Mini Power Switch


The Fingertech Mini Power Switch

  • Tired of plugging and unplugging the battery during an intense competition?
  • Has your robot been lacking a high-current power switch?
  • Our Mini Switch can be activated with the simple twist of an allen key.
  • No other switch is as small, lightweight and powerful!
  • Read Servo Magazine’s keen review of the Mini Power Switch here: Servo 2013-04 Mini Switch Review.pdf

Also! Have you been mounting your switch to your chassis with hot glue? Duct Tape? Zip Tie? Maybe even a twist of wire? Go Pro! Get the right kind of screws, washers, and nuts in our simple mounting kit here! Let us make it easy for you, no need to research and buy more than you need.
With extra-long screws to mate with any kind of chassis.


135 in stock (can be backordered)

Product Documents

Drawings - CAD


The Fingertech Mini Power Switch

Material: High-temperature nylon, copper terminals, aluminum screw
Dimensions: 12.7 x 12.7 x 6.35mm (0.5 x 0.5 x 0.25in)
Copper terminals: 3.5mm x 1mm (0.138 x 0.04in) extend 6.35mm (0.25in) from switch body
Weight: 2.15grams (0.076oz)

Allowable soldering temperatures:
350C : continuous
400C : 1min
450C : 12s
480C : 8s

Current Ratings (using 16-gauge wire):
Rated Current: 40A
Burst: 100A for 10 seconds
*Keep in mind that the size of the wire and type of wire insulation is the main limiting factor.  More heat is generated in smaller wires and in poor connections.  We have tested the switch with 10ga wire and we were able to run 95A for 3 minutes.

Temperature Chart (click to enlarge):

*Note that the 16ga wires get uncomfortably hot at 40A and nearly untouchable at 50A.
For higher current applications, use heavier wire!


Installation:The Fingertech mini power switch CAD drawing
Two mounting holes, spaced 7.62mm (0.3in) apart, can pass-through 2mm or 2-56 screws, or can be tapped for 3mm or 4-40 screw threads.

 Connect the battery to the terminal closest to the screw head.  The screw head is part of the circuit (constant connection to the far terminal), so this will ensure it is not live when the robot is off.

To connect the two copper terminals, use a 3/32″ hex wrench to tighten the screw (clockwise).  We sell a long arm 3/32″ hex wrench for reaching switches buried deep inside the robot.
* It does not take a lot of force to make a good connection – just finger-tight.
(The nylon is undersized to keep the screw from backing out due to vibrations.)
One full rotation counterclockwise disconnects power.

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