Smraza
Smraza 5.1V 3A Power Supply Compatible with Raspberry Pi 4 ON/Off Switch
Bottom line: The Smraza 5.1V 3A Power Supply ($8.99 on Amazon as of 2026-10-22 10:13 UTC): Delivers 5.1V at 3A, matching the Raspberry Pi 4's 3.0A USB-C power requirement; main trade-off: raspberry Pi 5 is not listed as a compatible board.
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*Price sourced from Amazon.com. Last updated 2026-10-22. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Delivers 5.1V at 3A, matching the Raspberry Pi 4's 3.0A USB-C power requirement
- ✓ On/off switch on the cable lets you power-cycle the Pi without unplugging USB-C
- ✓ 5ft (1.5m) cable reaches shelves, TV backs and cases away from the outlet
- ✓ ETL Listed, with a copper wire core and drop-tested housing per the listing
- ✓ Accepts a 100-240V AC, 50-60Hz input range
Cons
- ✗ Raspberry Pi 5 is not listed as a compatible board
- ✗ 3A output leaves little headroom for USB drives powered through the Pi
- ✗ Pi 3 micro-USB support is unclear; confirm the connector before buying for a Pi 3
- ✗ No warranty terms stated; the listing only offers a general satisfaction promise
Manufacturer description
The Smraza 5.1V 3A power supply is a USB-C adapter built for the Raspberry Pi 4 Model B. It works with the 1GB, 2GB, 4GB and 8GB versions. The Pi 4 draws more power than earlier boards and needs a 3.0A USB-C supply. This unit delivers 5.1V at 3A from a 100-240V AC, 50-60Hz wall input. The standout feature is the on/off switch on the cable. You don't have to pull the USB-C plug every time you want to restart or power down your board. You flip the switch instead, which also means less wear on the Pi's power port. The 5ft (1.5m) cable gives you room to put the Pi on a shelf, behind a TV or…
SpecPicks Verdict
SpecPicks scored Smraza 5.1V 3A Power Supply using a rating × review-volume × price-fit model applied to published specs and reviews across the single-board computers category. Smraza's single-board computers lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for single-board computers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Will this Smraza power supply work with my Raspberry Pi 4 8GB?
Yes. The listing names the Raspberry Pi 4 Model B in 1GB, 2GB, 4GB and 8GB versions. It outputs 5.1V at 3A over USB-C, which meets the Pi 4's 3.0A USB-C power requirement.
Can I use this power supply with a Raspberry Pi 5?
The Raspberry Pi 5 is not listed as compatible. The supply is rated at 5.1V 3A and designed for the Pi 4. If you have a Pi 5, check its official power requirements before buying.
Does it work with the Raspberry Pi 3?
The listing calls it a Pi 4/3 power supply and mentions both USB-C and Micro-USB. The Pi 3 uses a micro-USB power port, so check on the product listing that a micro-USB connector or adapter is included before you order it for a Pi 3.
Is it safe to turn off the Pi with the on/off switch?
The switch cuts power to the board right away. To avoid corrupting the SD card, shut down the operating system first (for example, with sudo shutdown now). Then use the switch to turn off power, and flip it again to boot.
How long is the cable and what input voltage does it accept?
The cable is 5ft (1.5m) long. The adapter accepts 100-240V AC at 50-60Hz with a 0.8A input rating. The plug type isn't listed in the specs, so check the product listing if you plan to use it outside North America.
Key Features
- Raspberry Pi 4/3 Power Supply - USB-C & Micro-USB power supply specially designed and tested for the Raspberry Pi 4. Compatible with (RPi 4 Model B), 1GB / 2GB / 4GB Version
- Pi 4B & PI 3 Power Supply with ETL Certification - ETL Listed. Input 100-240V AC, 50-60Hz, 0.8A. Output 5.1V 3A. Cable length 5ft/1.5m
- Raspberry Pi 4/3 Charger with on/off Design - With on/off switch, it's convenience to power on and power off your Raspberry Pi 4
- Raspberry Pi 4/3 Adapter Use Premium Material - Special design and high quality materials ensure that the adapter is kept in low temperature to charge safely
- If for ANY reason you aren't completely satisfied with the power supply, please let us know and we will give you a satisfy solution
Full Specifications
| ASIN | B07VFDYNL4 |
|---|---|
| Brand | Smraza |
| Color | Black |
| Wattage | 15.3 watts |
| Amperage | 3 Amps |
| Portable | No |
| Power Plug | No Plug |
| Item Weight | 0.11 Kilograms |
| Manufacturer | Smraza |
| Model Number | SD04 |
| Power Source | Corded Electric |
| Input Voltage | 240 Volts |
| Mounting Type | Wall Mount |
| Built-In Media | '1* 5.1V 3A type-c power supply, 1*Micro Usb Adapter' |
| Connector Type | USB Type C |
| Output Current | 3 Amps |
| Output Voltage | 5.1 Volts |
| Frequency Range | 50-60 Hz |
| Number of Items | 1 |
| Total USB Ports | 1 |
| Full listing title | Smraza 5.1V 3A Power Supply Compatible with Raspberry Pi 4 ON/Off Switch, USB-C Pi 4 Charger Raspi 4B Adapter for Raspberry Pi 4 Model B 1GB 2GB 4GB 8GB Version |
Ready to buy?
Smraza 5.1V 3A Power Supply Compatible with Raspberry Pi 4 ON/Off Switch, USB-C Pi 4 Charger Raspi 4B Adapter for Raspberry Pi 4 Model B 1GB 2GB 4GB 8GB Version is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-22. Price and availability subject to change.
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