The **MXAB-S2V1-R3** refers to a specific variation of the **Cherry MX Low Profile Speed** mechanical keyboard switch. This component is part of the Cherry MX low-profile series, designed for high-performance gaming and slim mechanical keyboards. Below is a breakdown of its technical specifications and electronic properties. ### 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Switch Type** | Mechanical (Low Profile) | | **Switching Characteristic** | Linear (Smooth, no click) | | **Actuation Force** | 45 cN (centinewtons) | | **Pre-travel (Actuation point)** | 1.0 mm | | **Total Travel** | 3.2 mm | | **Durability** | > 100 Million keystrokes | | **Contact Material** | Gold Crosspoint technology | --- ### 2. Key Electronic Components & Design #### Gold Crosspoint Contact The heart of the "R3" series is the gold crosspoint contact system. This involves two gold-plated triangular contacts that cross at right angles. This design ensures: * **High Reliability:** Gold does not oxidize, maintaining low contact resistance over time. * **Debounce Time:** Typically less than 1 ms, allowing for rapid signal processing by the keyboard controller. #### PCB Mounting & Pinout The MXAB-S2V1-R3 is designed for **SMT (Surface Mount Technology)**. * **LED Compatibility:** It features a transparent housing designed to work with SMD LEDs mounted directly on the PCB. * **Pins:** It typically features two metal pins for the electrical circuit and a central plastic "boss" for alignment on the PCB. #### Low Profile Geometry This part is ~35% shallower than standard Cherry MX switches. * **Height:** 11.9 mm (vs. 18.5 mm for standard MX). * **Efficiency:** The reduced travel distance (1.0 mm actuation) makes it an "electronic speed" switch, reducing the latency between the physical press and the electrical signal transmission. --- ### 3. Part Number Decoder (MXAB-S2V1-R3) | Segment | Meaning | | :--- | :--- | | **MX** | Product Family (Cherry MX) | | **A** | Low Profile Generation | | **B** | Linear switching characteristic | | **S** | "Speed" variation (1.0 mm actuation) | | **2V1** | Specific manufacturing/packaging revision | | **R3** | Refined version (usually indicating the 100-million-click durability update) | ---