Monoprice USB-C Female to USB-A Male, 3.1 Gen 2 Adapter
Product # 35254
UPC # 889028104439
$9.99
*Affirm is not available for business or international orders
Qty:
Out of Stock
ETA: TBD
Note:
Due to limited supply, all products are sold on a first-come first-serve basis. Auto Notification does not guarantee either availability or price. All prices are subject to change without notice.
*Your information will only be used to notify you when this item becomes available.
Qty: 1
$9.99
Qty: 2-9
$9.97
Qty: 10-19
$9.95
Qty: 20-49
$9.93
Qty: 50+
$9.91
Customers Also Shopped For
Questions and Answers
Do not include HTML, links, references to other stores, pricing or contact info.
My question is about:
If your question is about more than one item, click + to add them.
Browse 20 questions
Browse 20 questions
and 34 answers
Will this adapter pass video through from the USB-A to the USB-C into DVI/HDMI/VGA?
New User U
on Jul 2, 2019
BEST ANSWER: In my experience, no. I am using it with a 2015 Mac Book Air and the Consul Series: Premium & Compact Aluminum USB-C Adapter from Monoprice. All of the other ports work for me.
- Reply
- Inaccurate
- Fred R on Jul 2, 2019
- Purchased on Apr 18, 2019
BEST ANSWER: In my experience, no. I am using it with a 2015 Mac Book Air and the Consul Series: Premium & Compact Aluminum USB-C Adapter from Monoprice. All of the other ports work for me.
- Reply
- Inaccurate
- Fred R on Jul 2, 2019
- Purchased on Apr 18, 2019
No, USB-A has no built-in support for video, and this is merely a Male USB-A Female USB-C adapter - no other electronics involved.
- Reply
- Inaccurate
- Kevin E on Jul 3, 2019
- Purchased on Apr 3, 2019
From my experience I wasn't able to get video to work with my Dell dock.
- Reply(1)
- Inaccurate
- Satvir M on Jul 2, 2019
- Purchased on Dec 30, 2018
Thanks! I haven't been able to find any adapter like this that will pass video through. I think it is a limitation of all adapters like this.
- Reply
- New User U on Jul 3, 2019
It didn't work for me. I bought a dock instead with the proper ports.
- Reply
- Inaccurate
- David B on Jul 2, 2019
- Purchased on Apr 3, 2019
Don't see why not.
- Reply(1)
- Inaccurate
- James F on Jul 2, 2019
- Purchased on Jan 7, 2019
That was my thinking, until I couldn't get the video to work on one of my USB-C Multiport Adapters with HDMI. Then I found that it explicitly says that Video is not passed through. And when I checked other similar adapters, they all said the same thing, no Video pass through capability. I don't think any adapters of this type do. Sigh...
- Reply
- New User U on Jul 3, 2019
Vote for the best answer above!
Will this work with a USB Ethernet adapter? (e.g. Product # 34185)
A shopper
on Jan 2, 2020
Monoprice USB-C Female to USB-A Male, 3.1 Gen 2 Adapter
Monoprice Consul Series USB-C Gigabit Ethernet Adapter
BEST ANSWER: Yes, it will work just fine. Although I would recommend buying USB 3.0 to Gigabit Ethernet Adapter
Product # 11195 instead of the 2 units. Much cheaper and less prone to disconnecting
Product # 11195 instead of the 2 units. Much cheaper and less prone to disconnecting
- Reply
- Inaccurate
- Jerome D on Jan 3, 2020
Monoprice USB 3.0 to Gigabit Ethernet Adapter
BEST ANSWER: Yes, it will work just fine. Although I would recommend buying USB 3.0 to Gigabit Ethernet Adapter
Product # 11195 instead of the 2 units. Much cheaper and less prone to disconnecting
Product # 11195 instead of the 2 units. Much cheaper and less prone to disconnecting
- Reply
- Inaccurate
- Jerome D on Jan 3, 2020
Monoprice USB 3.0 to Gigabit Ethernet Adapter
I have never tried with that adapter. But I did find that if you use just one USB-A, it will only transfer data and not video.
- Reply
- Inaccurate
- John B on Jan 3, 2020
- Purchased on Feb 15, 2019
I believe that will work but why not just get an Ethernet adapter with a USB A connector?
- Reply
- Inaccurate
- George C on Jan 2, 2020
Vote for the best answer above!
Is this a passive device? I.e. no electronics,; only wires between the connectors.
Paul G
on Dec 24, 2021
BEST ANSWER: Correct, this is an un-powered, passive USB adapter. Although I have not measured the throughput, it works as advertised.
- Reply(1)
- Inaccurate
- Michelle K on Dec 24, 2021
- Purchased on Jun 14, 2021
BEST ANSWER: Correct, this is an un-powered, passive USB adapter. Although I have not measured the throughput, it works as advertised.
- Reply(1)
- Inaccurate
- Michelle K on Dec 24, 2021
- Purchased on Jun 14, 2021
Only passive,, basically just switches lines inside between two connectors on a pcb
- Reply
- Inaccurate
- Lawrence G on Dec 28, 2021
- Purchased on Jun 28, 2021
Paul, It is just a single connector/adapter : there is *no* wire.
- Reply
- Inaccurate
- Barry J on Dec 28, 2021
- Purchased on Jul 30, 2021
No wires, just plug it in and it works
- Reply
- Inaccurate
- Hbo on Dec 25, 2021
- Purchased on Mar 18, 2021
Vote for the best answer above!
Our sailboat has combo 110v/USB-A outlets installed in its salon, galley and heads. Is there a way to fasten these to the outlet faceplate screw or other location (such as the bulkhead next to the outlet) so they can be handy for USB-C charging when needed but not get lost or "get legs and walk away" when not used? Is there another adapter more suitable for this application?
Warren N
on Sep 14, 2021
BEST ANSWER: I have this device. Considering your desired application, I do not think this would work for you. You would need to find another solution.
- Reply
- Inaccurate
- Gantt E on Sep 14, 2021
- Purchased on Oct 27, 2020
BEST ANSWER: I have this device. Considering your desired application, I do not think this would work for you. You would need to find another solution.
- Reply
- Inaccurate
- Gantt E on Sep 14, 2021
- Purchased on Oct 27, 2020
Not with this adapter. It sounds like a usb combo outlet is what you need. A quick Google search and you see one pop up
- Reply
- Inaccurate
- Juan M on Sep 14, 2021
- Purchased on Nov 3, 2020
For power only use you could buy outlets that have two 110v outlets along with 1 USB-A and 1 USB-C
- Reply
- Inaccurate
- David K on Jan 5, 2022
- Purchased on Oct 14, 2020
Vote for the best answer above!
Will this work with a 2018 ipad pro 11"?
Eric C
on Dec 27, 2018
BEST ANSWER: Thank you for your question.
This item would not have any lightning connections so it would not connect to an iPad.
This item would not have any lightning connections so it would not connect to an iPad.
- Reply
- Inaccurate
- Tyler C Staff on Aug 14, 2019
BEST ANSWER: Thank you for your question.
This item would not have any lightning connections so it would not connect to an iPad.
This item would not have any lightning connections so it would not connect to an iPad.
- Reply
- Inaccurate
- Tyler C Staff on Aug 14, 2019
It won't connect to the iPad Pro directly, but if you are looking to connect it to your computer with a USB-A port, it would work. A better solution would probably be a USB-A to USB-C cable (like product 24287)
- Reply
- Inaccurate
- Rob P on Feb 1, 2021
- Purchased on Jun 18, 2020
Vote for the best answer above!
Will Monoprice USB-C Female to USB-A Male, 3.1 Gen 2 Adapter adapt Wavlink USB 3.1 GEN 1 docking station cable to my Dell XPS 8700 (windows 10) computer?
A shopper
on Jan 15, 2019
BEST ANSWER: Thank you for your question.
So long as both devices have the proper ports this will connect and pass the signal.
So long as both devices have the proper ports this will connect and pass the signal.
- Reply
- Inaccurate
- Tyler C Staff on Aug 15, 2019
BEST ANSWER: Thank you for your question.
So long as both devices have the proper ports this will connect and pass the signal.
So long as both devices have the proper ports this will connect and pass the signal.
- Reply
- Inaccurate
- Tyler C Staff on Aug 15, 2019
It will adapter the USB ports, but will not pass any video signal (HDMI).
- Reply
- Inaccurate
- Rob P on Feb 1, 2021
- Purchased on Jun 18, 2020
Vote for the best answer above!
Does it work with Apple CarPlay?
Aaron R
on Sep 22, 2021
BEST ANSWER: I have had no problems using it in my 2020 Ford Escape Hybrid.
- Reply
- Inaccurate
- STEPHANIE Y on Sep 23, 2021
- Purchased on Mar 20, 2021
BEST ANSWER: I have had no problems using it in my 2020 Ford Escape Hybrid.
- Reply
- Inaccurate
- STEPHANIE Y on Sep 23, 2021
- Purchased on Mar 20, 2021
Vote for the best answer above!
I have a Lenovo universal docking station with a USB-C connection cable. One of my laptops will only dock with a USB-A cable. Will this adapter transmit video signals from the laptop to the docking station?
Fred G
on Jan 19, 2022
BEST ANSWER: We use these with ASUS mobile monitors that only come with a USB-C cable but our Lenovo laptop requires USB-A. Although we aren't using it exactly like you, we are still using it to transmit video. I think it would work. The only problem you might run into is if you have 3 displays. I've ran into that issue when using USB-A instead of USB-C.
- Reply
- Inaccurate
- Internal I on Jan 20, 2022
- Purchased on Nov 18, 2021
BEST ANSWER: We use these with ASUS mobile monitors that only come with a USB-C cable but our Lenovo laptop requires USB-A. Although we aren't using it exactly like you, we are still using it to transmit video. I think it would work. The only problem you might run into is if you have 3 displays. I've ran into that issue when using USB-A instead of USB-C.
- Reply
- Inaccurate
- Internal I on Jan 20, 2022
- Purchased on Nov 18, 2021
No, this didn’t work for me; I had to connect the HDMI cable directly to the laptop, it didn’t come through the adapter
- Reply
- Inaccurate
- Emily B on Jan 21, 2022
- Purchased on Nov 19, 2021
Vote for the best answer above!
Could I connect my Apple IPad Pro 3 gen to my desktop with this?
Jeffrey B
on Apr 13, 2022
BEST ANSWER: My iPad's connection won't accept a USB C.
- Reply
- Inaccurate
- Robert G on Apr 19, 2022
- Purchased on Aug 4, 2021
BEST ANSWER: My iPad's connection won't accept a USB C.
- Reply
- Inaccurate
- Robert G on Apr 19, 2022
- Purchased on Aug 4, 2021
Vote for the best answer above!
Will this work to connect a USB-C webcam to a USB-A port?
Stephen J
on Feb 16, 2023
BEST ANSWER: Yes, it should work just fine. I have used the adapter for a variety of USB-C basic devices and it worked just plug and play with no drivers needed. The challenge would be if you're trying to run a device needing USB specific support but a typical webcam should work fine
- Reply
- Inaccurate
- Terence S on Feb 16, 2023
- Purchased on Mar 21, 2022
BEST ANSWER: Yes, it should work just fine. I have used the adapter for a variety of USB-C basic devices and it worked just plug and play with no drivers needed. The challenge would be if you're trying to run a device needing USB specific support but a typical webcam should work fine
- Reply
- Inaccurate
- Terence S on Feb 16, 2023
- Purchased on Mar 21, 2022
Vote for the best answer above!
Will this work with USB-C earbuds? To attach them to a computer without USB-C connector?
john j
on Jan 20, 2019
BEST ANSWER: Yes. It is perfect for adapting usb-c devices to computers that have usb-a, but no usb-c.
- Reply
- Inaccurate
- James F on Jan 20, 2019
- Purchased on Jan 7, 2019
BEST ANSWER: Yes. It is perfect for adapting usb-c devices to computers that have usb-a, but no usb-c.
- Reply
- Inaccurate
- James F on Jan 20, 2019
- Purchased on Jan 7, 2019
Vote for the best answer above!
I have a few power related questions:
If this adapter is plugged into a normal usb 3 port, can my device, through the adapter, draw the normal 900 mA of current?
If the adapter is plugged into a normal usb 2 port, will my device, through the adapter, see it's connection as usb 2, so it knows to draw less power (500 mA is the max for normal usb 2)?
And lastly, if I plug this into a dedicated usb charging port (USB Dedicated Charging Port), is this device capable of passing through the extra power that those ports can supply? Because that would be nice for charging my phone if I get one that uses the USB C current capabilities.
Thank you!
If this adapter is plugged into a normal usb 3 port, can my device, through the adapter, draw the normal 900 mA of current?
If the adapter is plugged into a normal usb 2 port, will my device, through the adapter, see it's connection as usb 2, so it knows to draw less power (500 mA is the max for normal usb 2)?
And lastly, if I plug this into a dedicated usb charging port (USB Dedicated Charging Port), is this device capable of passing through the extra power that those ports can supply? Because that would be nice for charging my phone if I get one that uses the USB C current capabilities.
Thank you!
A shopper
on Dec 12, 2019
BEST ANSWER: Regarding "if I plug this into a dedicated usb charging port (USB Dedicated Charging Port), is this device capable of passing through the extra power that those ports can supply? Because that would be nice for charging my phone if I get one that uses the USB C current capabilities."
A USB-A charger normally runs 5V, and its power capacity (W) is limited by the charger's max current, whether 6W if the charger can manage 1.2A, or maybe 10W if the charger can pump out 2A. Few phones and even cables can manage that much current, so their power is limited, and thus their battery filling speed (fewer W means fewer percent per hour).
To deliver more W and fill your battery faster, many USB-A chargers and many phones licensed Qualcomm's QuickCharge protocol. That lets the charger and the phone negotiate higher V so they can deliver more W without increasing the A.
There are some alternatives to QC, but that was common among Android phones in the US that had a USB-B Micro port for charging and data.
USB-C defined a new charging method called Power Delivery (PD) that more-or-less unifies the voltage negotiation process.
During USB-C's infancy and the transitional period from USB-A to USB-C, a very few chargers and a very few devices implemented QC over USB-C, without PD.
But if you have a modern phone with a USB-C charging port, it's very very unlikely to support both QC and PD.
If you plug your USB-C phone (through an adapter like this, or through a converter cable) into a USB-A charger, you'll almost certainly find yourself charging at the USB standard 5V with no QC negotiations to increase the V.
A USB-A charger normally runs 5V, and its power capacity (W) is limited by the charger's max current, whether 6W if the charger can manage 1.2A, or maybe 10W if the charger can pump out 2A. Few phones and even cables can manage that much current, so their power is limited, and thus their battery filling speed (fewer W means fewer percent per hour).
To deliver more W and fill your battery faster, many USB-A chargers and many phones licensed Qualcomm's QuickCharge protocol. That lets the charger and the phone negotiate higher V so they can deliver more W without increasing the A.
There are some alternatives to QC, but that was common among Android phones in the US that had a USB-B Micro port for charging and data.
USB-C defined a new charging method called Power Delivery (PD) that more-or-less unifies the voltage negotiation process.
During USB-C's infancy and the transitional period from USB-A to USB-C, a very few chargers and a very few devices implemented QC over USB-C, without PD.
But if you have a modern phone with a USB-C charging port, it's very very unlikely to support both QC and PD.
If you plug your USB-C phone (through an adapter like this, or through a converter cable) into a USB-A charger, you'll almost certainly find yourself charging at the USB standard 5V with no QC negotiations to increase the V.
- Reply
- Inaccurate
- Bob S on Mar 1, 2021
Monoprice Essentials USB-C to USB-A 2.0 Cable - 480Mbps 3A 26AWG Black 4m (13.1ft)
BEST ANSWER: Regarding "if I plug this into a dedicated usb charging port (USB Dedicated Charging Port), is this device capable of passing through the extra power that those ports can supply? Because that would be nice for charging my phone if I get one that uses the USB C current capabilities."
A USB-A charger normally runs 5V, and its power capacity (W) is limited by the charger's max current, whether 6W if the charger can manage 1.2A, or maybe 10W if the charger can pump out 2A. Few phones and even cables can manage that much current, so their power is limited, and thus their battery filling speed (fewer W means fewer percent per hour).
To deliver more W and fill your battery faster, many USB-A chargers and many phones licensed Qualcomm's QuickCharge protocol. That lets the charger and the phone negotiate higher V so they can deliver more W without increasing the A.
There are some alternatives to QC, but that was common among Android phones in the US that had a USB-B Micro port for charging and data.
USB-C defined a new charging method called Power Delivery (PD) that more-or-less unifies the voltage negotiation process.
During USB-C's infancy and the transitional period from USB-A to USB-C, a very few chargers and a very few devices implemented QC over USB-C, without PD.
But if you have a modern phone with a USB-C charging port, it's very very unlikely to support both QC and PD.
If you plug your USB-C phone (through an adapter like this, or through a converter cable) into a USB-A charger, you'll almost certainly find yourself charging at the USB standard 5V with no QC negotiations to increase the V.
A USB-A charger normally runs 5V, and its power capacity (W) is limited by the charger's max current, whether 6W if the charger can manage 1.2A, or maybe 10W if the charger can pump out 2A. Few phones and even cables can manage that much current, so their power is limited, and thus their battery filling speed (fewer W means fewer percent per hour).
To deliver more W and fill your battery faster, many USB-A chargers and many phones licensed Qualcomm's QuickCharge protocol. That lets the charger and the phone negotiate higher V so they can deliver more W without increasing the A.
There are some alternatives to QC, but that was common among Android phones in the US that had a USB-B Micro port for charging and data.
USB-C defined a new charging method called Power Delivery (PD) that more-or-less unifies the voltage negotiation process.
During USB-C's infancy and the transitional period from USB-A to USB-C, a very few chargers and a very few devices implemented QC over USB-C, without PD.
But if you have a modern phone with a USB-C charging port, it's very very unlikely to support both QC and PD.
If you plug your USB-C phone (through an adapter like this, or through a converter cable) into a USB-A charger, you'll almost certainly find yourself charging at the USB standard 5V with no QC negotiations to increase the V.
- Reply
- Inaccurate
- Bob S on Mar 1, 2021
Monoprice Essentials USB-C to USB-A 2.0 Cable - 480Mbps 3A 26AWG Black 4m (13.1ft)
Vote for the best answer above!
Vote for the best answer above!
Will this work for display output from USB 3.0 (1st gen) to a device that requires USB-C 3.1 ?
Suzette N
on Feb 1, 2022
BEST ANSWER: This would not work. A USB 3.1 display would outpace the bandwidth of a USB 3.0 port, and the protocols aren't supported on USB 3.0 either. It wouldn't simply be a matter of working slower; it simply wouldn't work.
- Reply
- Inaccurate
- Ian T on Feb 3, 2022
- Purchased on May 18, 2021
BEST ANSWER: This would not work. A USB 3.1 display would outpace the bandwidth of a USB 3.0 port, and the protocols aren't supported on USB 3.0 either. It wouldn't simply be a matter of working slower; it simply wouldn't work.
- Reply
- Inaccurate
- Ian T on Feb 3, 2022
- Purchased on May 18, 2021
Vote for the best answer above!
This device work with Monoprice One-Click USB-C Wireless 4K Conferencing Presentation System - Screen Mirroring, Instant Meeting Launch, Includes 2 Transmitters, Works with Windows, Mac, iOS, Android, and Miracast?
New User U
on Jan 20, 2025
Monoprice USB-C Female to USB-A Male, 3.1 Gen 2 Adapter
Monoprice One-Click USB-C Wireless 4K Conferencing Presentation System - Screen Mirroring, Instant Meeting Launch, Includes 2 Transmitters, Works with Windows, Mac, iOS, Android, and Miracast
BEST ANSWER: Not much to say really, it's a cable adapter and it works just fine.
- Reply
- Inaccurate
- JEFF N on Jan 20, 2025
- Purchased on Mar 23, 2024
BEST ANSWER: Not much to say really, it's a cable adapter and it works just fine.
- Reply
- Inaccurate
- JEFF N on Jan 20, 2025
- Purchased on Mar 23, 2024
Vote for the best answer above!
Can I use this to connect a Logitech full HD camera with USB-C for live streaming to my Dell laptop’s USB-A port?
James R
on May 18, 2020
Your website says back in stock today 5/30/20. What is your next best ETA guess?
James R
on May 30, 2020
Will this work with the official Apple USB-C 3.5mm headphone jack adapter when plugged into a plain old USB 3.0 port (that being what my Z97 motherboard from 2014 has)?
Ronald B
on Nov 23, 2020
I would like to use my docking station to my PC. Will it give me the Audio and video and other devices capabilities?
A shopper
on Dec 1, 2021
This adapter works with Monoprice One-Click USB-C Wireless 4K Conferencing Presentation System - Screen Mirroring, Instant Meeting Launch, Includes 2 Transmitters, Works with Windows, Mac, iOS, Android, and Miracast?
A shopper
on Jan 20, 2025
Monoprice USB-C Female to USB-A Male, 3.1 Gen 2 Adapter
Monoprice One-Click USB-C Wireless 4K Conferencing Presentation System - Screen Mirroring, Instant Meeting Launch, Includes 2 Transmitters, Works with Windows, Mac, iOS, Android, and Miracast
Questions For Similar Products
Reviews
5.0 / 5.0
44 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
42
2
0
0
0
Rated 5 out of 5
Does the job perfectly
Sturdy connector.
Perfect tool if your cable bag has a mix of old & new cables
Perfect tool if your cable bag has a mix of old & new cables
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 5 out of 5
Monoprice USB-C Female to USB-A Male, 3.1 Gen 2 Adapter - main image Monoprice USB-C Female to USB-A Male, 3.1 Gen 2 Adapter Product # 35254
Working good , so far.
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 5 out of 5
Pump it up! (I use it for audio)
Great product. I use it to connect my MOMENTUM 3 Headphones to my PC. The sound really pumps!
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 5 out of 5
Hard-to-find adapter
This enabled me to connect my new webcam to my older computer--thank you!
- Was this review helpful? Yes (1) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (1) No (0)
- Flag as Inappropriate
Rated 5 out of 5
Plug changer
Works s advertised....best price I have found
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 5 out of 5
Works well but EVERYTHING about it confounds me!
I have SO many questions! The more I tested this cable, the more confused I became.
1) This cable DOES succeed in 10 Gbps data transfer (see picture with CrystalDiskMark results. (1000 MB/s is approximately equal to 10 Gbps).
2) This cable works equally well in either orientation of the adapter relative to attached USB-C cable. (While that seems like it should be a given, 2 other similar adapters from other companies only worked at 10 Gbps in one orientation of the adapter, so I'm very happy with this point on this adapter.)
3) BUT, when I connected this adapter (via a known/trusted/pre-tested Anker USB-C 4.0 cable) to a Treedix USB wire/pin tester, the test results are not showing ANY of the TX/RX pins being connected. That 'usually' means a cable is USB 2.0 only (without TX/RX wires in the cable at all). But this adapter definitely does use the TX/RX wires since it can do 10 Gbps speed. So why do USB pin testers not light the TX/RX wires? Is anything special going on in adapter that would explain this?
4) The 2 pictures from the other tester from Bit Trade also reflect only USB 2.0 wires being connected in the adapter. You can see the 'USB 2.0' lights are lit up, but the USB 3.2 lights (connected to the TX/RX lines) are not lit. But again, that can't be true based on this adapter's demonstrated 10 Gbps speed? What's going on?
5) Using the Bit Trade tester with a USB-C cable connected to the A-side of the tester on one end and the Monoprice adapter on the other end, the tester reads the adapter as advertising 2 different Rp pull-up resistors: A56 k Ohm resistor on one CC line and 22K ohm resistor on the other CC line. The 56 k Ohm resistor is expected, normal, and required by the USB-IF spec. But there is NOT supposed to be a 22 K ohm resistor here! A 22 k Ohm resistor is not allowed here by USB-IF spec and could cause a USB-A source port to try to send more power than it is capable of providing and overheat. I hope that somehow this tester reading is inaccurate since I really like this adapter but this seems like an issue.
6) When I connect the same cable/adapter connection to the B side of the Bit Trade tester, the MP adapter advertises a 5.1 K ohm pull-down resistor. This is surprising because I don't expect to see a change in the resistor just by switching from the A to B ports on the tester. A 5.1 k ohm resistor would be used when the USB-C side is the source/host side and the USB-A side is the device/sink side. So I wondered if this adapter was allowing power flow in BOTH directions (which I have not seen before with similar adapters). But when I tried testing power flow, it only worked in the expected USB-A to USB-C direction, but not from USB-C to USB-A.
So while I LOVE the speed of this adapter, I am very confused that it shows weird results for every test I tried. I hope Monoprice has some idea of why i see these things. And the tester seeing a 22 k ohm resistor is worrisome so I am especially interested in understanding why that is present.
1) This cable DOES succeed in 10 Gbps data transfer (see picture with CrystalDiskMark results. (1000 MB/s is approximately equal to 10 Gbps).
2) This cable works equally well in either orientation of the adapter relative to attached USB-C cable. (While that seems like it should be a given, 2 other similar adapters from other companies only worked at 10 Gbps in one orientation of the adapter, so I'm very happy with this point on this adapter.)
3) BUT, when I connected this adapter (via a known/trusted/pre-tested Anker USB-C 4.0 cable) to a Treedix USB wire/pin tester, the test results are not showing ANY of the TX/RX pins being connected. That 'usually' means a cable is USB 2.0 only (without TX/RX wires in the cable at all). But this adapter definitely does use the TX/RX wires since it can do 10 Gbps speed. So why do USB pin testers not light the TX/RX wires? Is anything special going on in adapter that would explain this?
4) The 2 pictures from the other tester from Bit Trade also reflect only USB 2.0 wires being connected in the adapter. You can see the 'USB 2.0' lights are lit up, but the USB 3.2 lights (connected to the TX/RX lines) are not lit. But again, that can't be true based on this adapter's demonstrated 10 Gbps speed? What's going on?
5) Using the Bit Trade tester with a USB-C cable connected to the A-side of the tester on one end and the Monoprice adapter on the other end, the tester reads the adapter as advertising 2 different Rp pull-up resistors: A56 k Ohm resistor on one CC line and 22K ohm resistor on the other CC line. The 56 k Ohm resistor is expected, normal, and required by the USB-IF spec. But there is NOT supposed to be a 22 K ohm resistor here! A 22 k Ohm resistor is not allowed here by USB-IF spec and could cause a USB-A source port to try to send more power than it is capable of providing and overheat. I hope that somehow this tester reading is inaccurate since I really like this adapter but this seems like an issue.
6) When I connect the same cable/adapter connection to the B side of the Bit Trade tester, the MP adapter advertises a 5.1 K ohm pull-down resistor. This is surprising because I don't expect to see a change in the resistor just by switching from the A to B ports on the tester. A 5.1 k ohm resistor would be used when the USB-C side is the source/host side and the USB-A side is the device/sink side. So I wondered if this adapter was allowing power flow in BOTH directions (which I have not seen before with similar adapters). But when I tried testing power flow, it only worked in the expected USB-A to USB-C direction, but not from USB-C to USB-A.
So while I LOVE the speed of this adapter, I am very confused that it shows weird results for every test I tried. I hope Monoprice has some idea of why i see these things. And the tester seeing a 22 k ohm resistor is worrisome so I am especially interested in understanding why that is present.
- Was this review helpful? Yes (4) No (0)
- Flag as Inappropriate
February 26, 2024
- Was this review helpful? Yes (4) No (0)
- Flag as Inappropriate
Rated 5 out of 5
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 5 out of 5
An important Adapter to have..
I've purchased a number of Monoprice USB-C Female to USB-A Male, 3.1 Gen 2 Adapters over the years. I'm always glad that I have one handy when I have a device with a USB-C Male connector cable that I need to plug into a device that has a Female USB-A outlet. These adapters make it unnecessary to carry around
the larger USB hubs.
the larger USB hubs.
- Was this review helpful? Yes (1) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (1) No (0)
- Flag as Inappropriate
Rated 5 out of 5
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 5 out of 5
Just what I needed!
Worked great! Adapters are great products.
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Response from Monoprice
Thank you for taking the time to review your product. We hope it continues to meet your expectations. Thank you for shopping with us!
June 26, 2023
Eli S
Reviews for Similar Products