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Home » Categories » Connectors & Switches

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FingerTech Mini Power Switch
FingerTech Mini Power Switch
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• Has your robot been lacking a high-current power switch?  Tired of plugging and unplugging the battery during an intense competition? 
• 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


Specifications:
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)



Installation:
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.

Tip:
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.

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


Operation:
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.



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 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!


 
17 Product Reviews - Average rating 4.8 / 5 (Show All)

Click to review this product

GREAT

- 18th March 2017

Part of it was broken but as soon as I notified them they shipped a new one! Great switch and great customer service!

Very cool.

- 16th September 2016

Don't second guess this one. Buy it! Don't struggle with screws ductape or zip ties. R/C power switches are unreliable in battle. Being able to turn the bot on with a twist makes those stressful moments before a fight much calmer. It's weight is almost insignificant. Again if your thinking bout it.... Buy it.. Heck buy two at the price you won't regret it.

Great compact switch

- 03rd February 2016

Was able to run ~160A burst through the switch in my 15 pound robot without any issues. Very impressive, especially considering how small it is!

Great compact switch

- 03rd February 2016

Was able to run ~160A burst through the switch in my 15 pound robot without any issues. Very impressive, especially considering how small it is!

Works fine with 6s LiPo running 4 drill motors

- 03rd February 2016

I have a Mini switch in my 12lber that works fine for running 4 drill motors with a 6s LiPo (25.8v fully charged). I'm using 16 gauge wire, and it doesn't even get slightly warm.

My only issue is it seems like the power can turn off if I tighten the screw too much. I've never had it turn off on its own though.
[FTR: That sounds like it may be a problem with the individual switch. Contact us to get it fixed!]


Handles serious power

- 03rd February 2016

Ran this little switch in a 12lb combat robot at 28.8v and 70amp pulse current draw. 2 drill motors and a chunky brushless weapon motor. Switch preformed flawlessly. Easy to mount and solder.

Click to review this product

Hex WrenchHex Wrench - 0.95 CAD
• Hex Wrench (aka Allen Key)
• Used for various screws and setscrews (see details)
 
Price: 9.52 CAD
7.56 USD 6.49 EUR

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