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White rectangular wall adapter with Micro USB cable and inline on/off switch

Micro Connectors

Micro Connectors RAS-PWR03-PI 5V 2.5A Micro USB power adapter with on/off switch

SKU CH-KTKZ-E4YZC MPN RAS-PWR03-PI

A 5V 2.5A Micro USB power adapter with a built-in on/off switch, UL and FCC approved, DoE Level VI efficiency, and over-voltage and short-circuit protection for Raspberry Pi boards

  • Key featuresSpecifications: Input: AC 100-240 V / 50-60 Hz Output: DC 5
  • Stable 5 V 2.5 A output powers Raspberry Pi reliably
  • Built-in on/off switch removes need to unplug cable
  • UL and FCC approved for certified safety
  • DoE Level VI efficiency meets energy standards
  • Over-voltage and short-circuit protection guards connected hardware

Power adapter with on/off switch

This Micro Connectors 5V 2.5A Micro USB power adapter delivers a stable 12.5W output for Raspberry Pi boards and similar development devices. The integrated on/off switch lets you cycle power without unplugging the cable, reducing connector wear during frequent restarts. UL and FCC approvals plus over-voltage and short-circuit protection provide safe operation across 100-240V AC mains.

Thermals noise and power draw

The adapter meets DoE Level VI efficiency standards, limiting no-load and active-mode waste heat during continuous use. A 47-inch cable allows flexible placement away from the power strip, keeping the brick clear of other equipment. With a weight of 0.25 lb the unit adds negligible load to a bench or enclosure mount.

Upgrades from basic USB chargers

Makers who have relied on generic phone chargers gain a dedicated 2.5A supply rated for the full load of a Raspberry Pi 3, Pi 2, Pi 1 or Pi Zero. The inline switch eliminates the need to pull the Micro USB plug for every reboot, preserving the board's power port. Builders needing higher current for Pi 4 or USB-C devices should select a different adapter.

How it compares

Measured against everything we stock in Single-Board Computers & Dev Kits, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 97% of the 1,420 comparable items (median $44.99).

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Specifications

Product
Brand nameMicro Connectors
Model nameRAS-PWR03-PI
Size & build
Shipping weight0.09 kg
Package size157 × 64 × 38 mm

Questions about this item

How do I connect the Micro Connectors RAS-PWR03-PI to my Raspberry Pi without damaging the Micro USB port?

Plug the Micro USB connector into the Pi's power input, then use the inline on/off switch to control power instead of repeatedly unplugging the cable. The 47 inch cable provides enough length to position the adapter conveniently.

Will the cable or switch on the RAS-PWR03-PI wear out and need replacement?

The built-in on/off switch is designed to handle daily power cycling so the Micro USB connector does not take mechanical stress. The 3.9 foot cable is fixed to the adapter and not user-replaceable.

At what load does the RAS-PWR03-PI hit its thermal or current limit during sustained use?

The adapter delivers up to 2.5A at 5V (12.5W) continuously. Over voltage and short-circuit protection will activate if the connected draw exceeds the rated output or a fault occurs.

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