Data Sheet

Typical wiring diagram for the Pololu RC Switch with Medium Low-Side MOSFET.

An onboard regulator allows the switch to be powered from voltages between 2.5 V and 16 V.

However, for most applications we recommend using a 4- or 5-cell NiMH or NiCD battery pack to

power the switch. The battery pack will typically be connected to an RC receiver or servo controller

[https://www.pololu.com/category/102/maestro-usb-servo-controllers], which passes the power on to the RC

switch. The switch can be plugged directly into the RC receiver using a Female-Female servo

extension cable. These can be found in our Servo Cables [https://www.pololu.com/category/112/servo-

cables] category.

The negative side of your load supply should connect to the GND pad on the top-right side of the

board, and the negative side of the load itself should connect to the LOAD LOW pin. The four pins

labeled LOAD HIGH are internally connected and intended to give you convenient connection points

for both your load and your load power supply. There is a flyback (also known as a “freewheeling”)

diode between the MOSFET output and LOAD HIGH, which allows you to safely connect an inductive

load such as a motor or relay. Alternatively, the positive side of the load could be directly connected to

the load supply off of the board. The board’s MOSFET can deliver up to 15 A with VCC at 5 V and can

4. RC Switch with Medium Low-Side MOSFET Page 22 of 45