Omron
Kailh 4.0 Red Mouse Switch
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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.
Shipping & Returns
Returns:
Thank you for purchasing from dfh.fm. I want you to be completely satisfied with your purchase. If for any reason you are not satisfied, you may return your purchase within 60 days of the original purchase date.
Defective items: Please inspect items upon receipt. If you receive a defective item, you may return it for a full refund or replacement within 90 days of the original purchase date. Please contact me to initiate a return for a defective item.
Non-defective items: If you are not satisfied with a non-defective item, you may return it for a refund within 30 days of the original purchase date. A 20% restocking fee will be deducted from the refund amount, to offset the time and inconvenience, as I am the sole employee processing the return and restocking the item. The fee also covers the costs associated with processing the return. Refunds for non-defective items will be issued through the original payment method.
Preordered items: Due to the nature of preorders, delivery dates are subject to change. Please keep in mind that, If you have preordered an item, it is not eligible for a refund until after it has arrived at the store. Once the item arrives at the store and is inspected, you may request a refund within 30 days of the original purchase date. Please note that refunds for preordered items may take up to 10 days to be issued.
To initiate a return, please open a ticket on the shop’s discord channel, with your order number and the reason for the return. We will provide you with further instructions on how to return your purchase.
Thank you for shopping with us. If you have any questions or concerns, please don't hesitate to contact me, via Discord.
Order alterations and cancellations:
Once an order has ben submitted, no alterations can be made. This includes adding or removing items or canceling orders. You are welcome to return an order, once you have taken receipt, following the returns procedure listed above.
Shipping:
US Shipping is via UPS or USPS. The way it is set up shows the least expensive options for standard, priority and express shipping. I can not take special requests for specific carriers at this time.
International shipping is mostly UPS, as I utilize Zonos/UPS integration to tally extremely accurate import and shipping costs.
I require a telephone and email with international orders and you must make yourself available to the carrier or your customs, should they require more information. If you are unreachable and the package is discarded or rerturned, I will not be responsible for rerturning your shipping cost.
If there is a problem with an international order, it is my choice to refund part or all of the order, or send a replacement.
Addresses are verified through Shopify, but the customer is still responsible for inputting their address in the correct format. Any returns or lost shipments, due to incorrectly addressed packages, are the responsibility of the customer.
