|Item model number||DCAR-RSP-2A5|
|Item Weight||3.2 ounces|
|Product Dimensions||3.8 x 2.8 x 1.2 inches|
|Item Dimensions L x W x H||3.75 x 2.75 x 1.25 inches|
CanaKit 5V 2.5A Raspberry Pi 3 B+ Power Supply / Adapter (UL Listed)
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- Tested with all versions of the Raspberry Pi including the Pi 2 and Pi 3
- UL Listed
- 5 Feet cord length
- Micro USB plug
- Output 5V DC 2.5A Regulated Input 100V to 240V AC
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From the manufacturer
CanaKit 5V 2.5A Raspberry Pi 3 Power Supply / Adapter / Charger
The CanaKit 2.5A Raspberry Pi power supply differs from typical standard 5V USB power supplies in the market in that it can deliver a full 2.5A and still output a voltage well within the USB minimum voltage specifications. This adapter has been incorporated as an inline noise filter for highest stability and reliable operation.
The power supply still has about 0.5A of output power to spare, so even at the maximum current supported by the Raspberry Pi 3, the power supply is not at it's absolute maximum. It is also ideal for use by anyone over-clocking the Raspberry Pi which causes higher power requirements that a lower power adapter may not be able to supply. With this power supply, you can power the Raspberry Pi 3 at full load as well as up to 1.2A across the four USB ports.
- This adapter has been specially designed and tested for the new Raspberry Pi 3.
2.5A is now a requirement for the Raspberry Pi 3. The CanaKit 2.5A Raspberry Pi power supply / adapter has been specially designed and tested for the new Raspberry Pi 3 and incorporates an inline noise filter for highest stability and reliable operation.
This power supply differs from typical standard 5V USB power supplies in the market in that it can deliver a full 2.5A and still output a voltage well within the USB minimum voltage specifications. Standard 5V USB power supplies in the market have a high voltage drop when the full current is drawn from them which may cause the Raspberry Pi to reboot unexpectedly.
With this power supply, you can power the Raspberry Pi 3 at full load as well as up to 1.2A across the four USB ports. The power supply still has about 0.5A of output power to spare, so even at the maximum current supported by the Raspberry Pi 3, the power supply is not at its absolute maximum.
It is also ideal for use by anyone over-clocking the Raspberry Pi which causes higher power requirements that a lower power adapter may not be able to supply.
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The IV curves show the current (I) and voltage (V) for different resistances (R). This tells the story about how the supply delivers power for different loads (power = I * V).
You can see that both supplies have an open-circuit voltage of 5.3V. That is the lower rightmost point. R = ∞Ω, I = 0A, P = 0W.
The upper left points of each curve are the closest to R = 0 (short circuit) that we can measure (R = 0.94Ω due to wiring resistance). You can see that the Kootek delivers just about 3A of current and the Canakit delivers about 3.8A. But at this point both are way below 5V (below 3V, in fact.).
An interesting point is where the curves cross their rated current values. The Kootek 2.0A supply crosses 2.0A at about 4.6V (2.0*4.6 = 9.2W). The Canakit 2.5A supply crosses 2.5A at about 4.5V (2.5*4.5 = 11.25W). Both of these are well below 5V. Probably high enough that the RPi won't crash, but cutting it close.
Another interesting point is where the curves cross 5.0V. The Kootek 2.0A supply crosses 5.0V at about 0.8A (0.8*5.0 = 4.0W). The Canakit 2.5A supply crosses 5.0V at about 1.0A (1.0*5.0 = 5.0W).
People who are claiming that this supply doesn't deliver 2.5A are correct - if they are expecting it to deliver 2.5A at 5.0V. But what is important is whether the supply is sufficient for the RPi 3. All I can say for sure is that it does deliver proportionally more power than a 2.0A-rated power supply that has worked fine for me with the Gen 1 RPi B+. For that reason, I'm giving it four stars.
For anyone with specific voltage requirements at the rated (or other) current, you can read the values off the IV curve in my attachment.
Unfortunately, I simply looked at the average rating and number of reviews, without taking the time to look at all of the 1 star reviews mentioning how often these fail. Also, Amazon buyers beware: This item IS NOT ELIGIBLE FOR RETURN. So I'm stuck with a worthless paperweight.
I spent a lot of time making sure the 60 Hz hum wasn't coming from the 3.5 mm cord itself. (The hum is greatly reduced, though not eliminated, if I use the USB power supply that came with my tablet.)
Disappointed with the lack of quality on this power supply and failure to meet its marketing specs.
I was having freezes and crashes before, thought it might be the sd card or pi board itself, but this psu corrected all of that. Running very stable now.
If you’re having similar issues, defibitely give this psu a try.
Down to two stars. One of them is causing the yellow lightening bolt to appear on screen on my Pis. This means it's browning out. Testing it on my old first gen Model B with LibreElec on it, it is causing pretty severe visual distortions (green lines, audio popping sounds). 2.5A... I doubt that now. Highly doubt that. I will be looking for another brand when I buy my next power adapter.
I have ordered a total of three of these now. I do have to bump the rating down to 4 stars seeing as number 3 works really intermittently. As in it does not work most of the time. A replacement is on its way for that one.
Works great, overall cord length is good. Output is amazing. When I got my first Raspberry Pi Model B, the best thing I could find at the time was an EasyAcc 5v 2a charger. It's been chugging along great and is still powering my old Model B. Now though this CanaKit 5v 2.5a costs about the same and provides better amperage for the same price. It was an obvious choice to go with for by Pi 2. Been constantly powering my Pi 2 for months with it now.