Kailh 4.0 Red Mouse Switch

Kailh GM 4.0 Red mouse microswitch for click repair and mouse mods. This is the red GM-series Kailh mouse switch: a crisp-feeling, high-cycle replacement switch rated by Kailh for 60,000,000 mechanical cycles.

Why use the GM 4.0 Red?

• Crisp tactile click: Kailh describes the GM micro-switch feel as uniform force with no hysteresis and a controlled 25% CR value.
• High-use durability: the GM 4.0 Red is positioned by Kailh as a gaming-mouse micro switch, with contact/spring changes aimed at reducing wear during fast repeated clicking.
• Drop-in repair candidate: use it when your mouse PCB accepts this style of soldered mouse microswitch and you want a firmer, clickier replacement than many stock switches.

Specifications

• Model / MPN: Kailh GM 4.0 Red
• Electrical rating: 30V DC / 0.1A maximum
• Operating force: 65±15gf
• Release force: 25gf minimum
• Operating position: 6.90±0.2mm
• Withstand voltage: 500V AC, 50-60Hz
• Mechanical life: 60,000,000 cycles minimum

Fitment and alternatives

Best for mouse-button repair and mouse modding where the original switch footprint matches the Kailh GM mouse-switch body. If you are shopping for printer endstop-style microswitches instead, compare our live D2FC-F-7N Microswitch and Omron D2F-5L Microswitch.

Gotchas

• This is a clicky mechanical microswitch, not a silent mouse switch.
• Installation normally requires opening the mouse and solder/desolder work; confirm your mouse PCB footprint before buying.
• Despite the old store vendor field, this listing is for a Kailh/Kaihua GM 4.0 Red switch, not an Omron-branded switch.