The TK05 at an angle: a black board with a gold-plated border, a square black self-locking switch with a round black button near the top, two tiny resistors beside it, a small LED below, two big mounting holes, LATCHING SWITCH and ACTIVE HIGH printed along the edges, and a right-angle four-pin header labelled GND, VCC, NC and SIGNAL.

You have thistk05

Latching Button

A push-on, push-off switch with its pull-down and a red indicator LED already fitted: one press turns SIGNAL HIGH and it stays HIGH, through a reset or a power cut, until the next press.

Switch: 12× 12 mm, push on, push off
Pull-down: 10kΩ fitted, on reads HIGH
Force: 700gf, a firm press
Wires: 3GND, VCC, SIGNAL

Start here · 01 The four pins Open the board in 3D

Turn it over and see the three holes to wire: GND, VCC and SIGNAL. VCC sets the voltage SIGNAL reads when the switch is on, so match it to your board. NC is connected to nothing.

Product questions & answers ↓

The whole handbook9 articles · 40 min Quick referencePDF · 470 KB Latching Button model (GLB)GLB · 911 KB Latching Button CAD (STEP)ZIP · 772 KB Latching Button drawing (PDF)PDF · 2.2 MB Latching Button drawing (DXF)ZIP · 32 KB Pinout and specsThe pin table, and the questions people ask first

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Latching Button

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Need another

Not on general sale yet. Reply to your order and we will sort out a spare — quote tk05.

Order or missing parts?

Email us or reply to your order, and quote tk05 — that identifies the product. If something is missing from the bag, your order is the record of what shipped.

Take it with you

Point a phone camera at the code and this page opens there. It is the same address as the one printed on your box, so it is also what to show someone you are passing the board to.