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CanaKit 5V 2.5A Raspberry Pi 3 B+ Power Supply / Adapter (UL Listed)

by CanaKit

1,103 customer reviews

| 43 answered questions

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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.

WARNING: California’s Proposition 65

Product description

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.

Product information

Technical Details

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Other Technical Details

Brand Name

CanaKit

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

Additional Information

ASIN

B00MARDJZ4

Customer Reviews

1,103 customer reviews

4.5 out of 5 stars

Best Sellers Rank

#2 in Computers & Accessories > Computer Components > Internal Components > Internal Power Supplies

Shipping Weight

3.2 ounces (View shipping rates and policies)

Domestic Shipping

Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.

International Shipping

This item can be shipped to select countries outside of the U.S. Learn More

Date First Available

July 31, 2014

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

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1,103 customer reviews

By customer groups & interests

Arduino

4.4

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4.2

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Chris Satterlee

IV Curve

April 4, 2016

Verified Purchase

The attached image shows measured IV curves for this power supply compared to a 2.0A power supply (Kootek). I generated these with a RPi-based IV curve tracer that I built for solar panels (search for "IV Swinger" on YouTube and/or GitHub if you're interested in knowing more about it). It's not intended for such small voltages, but it worked pretty well.

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.

268 people found this helpful

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Comment

Amazon Customer

Failed after only 1 day, and not eligible for return. Buyer beware!

February 5, 2017

Verified Purchase

Throwing my name into the bucket for failed power supplies. Bought this along with a RBP 3B, and after only a single day the power supply failed. Plugging the Pi into my Samsung phone charger boots up just fine, but no red LED or heat at all with this power supply.

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.

14 people found this helpful

Helpful

Comment

Sam

Definitely NOT low noise, nor filtered

May 18, 2018

Verified Purchase

I purchased this power supply because it purported to have filtering and be "low noise" because I needed it for an audio application (an Echo Dot connected to high quality external speakers). It is definitely NOT low noise: you can hear faint 60 Hz harmonics through the speakers (which points to inadequate filtering on the Echo Dot, too, frankly).

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.

4 people found this helpful

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Comment

J Pass

Not the proper voltage for Raspberrypi

May 31, 2017

Verified Purchase

puts out less than 4.6volts. Not a 5 volt supply you can use on a Raspberrypi, especially the 3.

5 people found this helpful

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Comment

At Home

Corrected Instability Issues

February 21, 2018

Verified Purchase

I haven’t tried the official Raspberry Pi psu, but of all the ones I have tried (including a 3a charger I bought from WD specifically to run a hard drive and a Pi) this is the only one that has offered clean power with no brown outs and no low voltage notifications.

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.

One person found this helpful

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Comment

amazoner

A good choice for power. UPDATE - not anymore.

February 2, 2016

Verified Purchase

UPDATE 09/18/2017:
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.

UPDATE 03/23/17:
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.

Original Review:
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.

10 people found this helpful

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Comment

Amazon Customer

Great dependable power supply - if you're getting a Pi, get a kit that bundles this in!

July 26, 2017

Verified Purchase

This really saved me in the nick-of-time - not all Raspberry Pi boards come with any kind of power supply, so when I realized I had ordered just a Pi without this crucial cable, it was really convenient to find a cheap one boxed up and ready to go. Great product works very much so as expected. I would recommend that if you are purchasing a new raspberry pi as well, that you simply get the CanaKit package that includes the Pi and the power supply and 2 small heat sinks - it will save you some packaging and potentially a couple extra purchases.

One person found this helpful

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Comment

Joseph K.

Over time I noticed that I had a lightning bolt ...

November 6, 2017

Verified Purchase

Over time I noticed that I had a lightning bolt appear in the upper right corner of my screen when working on my rasp pi. I did some research and discovered that this is a warning that only appears when the raspberry pi is underpowered. I have had a lot of problems with my pi, and i'm starting to think that this is reason why. This power supply was advertised as being compatible with the pi, but it doesn't appear to be.

3 people found this helpful

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CanaKit 5V 2.5A Raspberry Pi 3 B+ Power Supply / Adapter (UL Listed)

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CanaKit 5V 2.5A Raspberry Pi 3 Power Supply / Adapter / Charger

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