The **ALTG-132-R** is a high-performance mechanical keyboard switch manufactured by **Akko**. It belongs to their specialized "Tactile" series, specifically designed for enthusiasts who prioritize tactile feedback and durability. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. Technical Specifications The following table summarizes the key electrical and physical properties of the ALTG-132-R switch: | Feature | Specification | | :--- | :--- | | **Switch Type** | Tactile | | **Operating Force** | 45gf ± 5gf | | **Tactile Force** | 60gf ± 5gf | | **Total Travel** | 3.3mm ± 0.3mm | | **Pre-Travel** | 2.0mm ± 0.3mm | | **Lifespan** | 50 Million Actuations | | **Contact Material** | Gold-plated copper alloy | --- ### 2. Electronic Component Composition From an electronic hardware perspective, the ALTG-132-R consists of several critical conductive parts that facilitate the signal transmission to the keyboard's PCB (Printed Circuit Board): #### A. The Leaf Spring (Contact Points) The heart of the switch's electronics is the **Gold-plated contact leaf**. - **Purpose:** When the stem is pressed down, it pushes the metal leaves together to complete the circuit. - **Material Logic:** Gold plating is used to prevent oxidation (rust) over time, ensuring a consistent low-resistance connection throughout its 50-million-click lifespan. #### B. Pin Configuration The ALTG-132-R typically uses a **3-Pin (Plate Mount)** configuration: - **Center Post:** Stability guide. - **Metal Pins (2x):** These are the electrical leads that are either soldered into the PCB or inserted into "Hot-Swap" sockets. #### C. Actuation Logic Unlike a linear switch, the ALTG-132-R has a "bump" on the stem. Electronically, the "Tactile Force" (60gf) occurs just before the electrical "Make" (the point where the circuit closes). This provides the user with physical confirmation that the keypress has been registered electronically. --- ### 3. Materials and Build The choice of materials affects both the sound and the electrical reliability: * **Stem:** POM (Polyoxymethylene) for low friction. * **Housing:** Usually a blend of Polycarbonate (top) and Nylon (bottom) to house the electronic components securely. * **Spring:** High-quality stainless steel that provides the return force to break the electrical connection. --- ### 4. Compatibility Note Because this is a standard mechanical switch, it is compatible with: 1. **LEDs:** Most housings feature a slot for through-hole LEDs or are transparent enough for SMD (Surface Mount Device) LEDs on the PCB. 2. **Voltage:** Designed for low-voltage DC signals (standard for USB keyboards, typically 5V or 3.3V logic).