The **MA12TBD-R** is a specific electronic component typically identified as a **Miniature Toggle Switch** manufactured by **Mountain Switch** (often distributed by Mouser and other major suppliers). It belongs to a series of reliable, board-mounted switches used for signal switching and power control in compact devices. --- ### 1. General Specifications The following table outlines the primary electrical and mechanical characteristics of the MA12TBD-R: | Feature | Specification | | :--- | :--- | | **Circuit Type** | SPDT (Single Pole Double Throw) | | **Switch Function** | ON-ON | | **Current Rating** | 6A @ 125VAC / 3A @ 250VAC | | **Contact Material** | Silver Plated (Standard) | | **Mounting Type** | Through-hole (PCB Mount) | | **Terminal Type** | PC Pin | | **Actuator Style** | Standard Round Toggle | --- ### 2. Detailed Part Breakdown The alphanumeric code "MA12TBD-R" identifies specific attributes of the switch: * **MA Series:** Indicates the Miniature Toggle series. * **12:** Refers to the internal wiring configuration (SPDT). * **T:** Represents the actuator style (Toggle). * **BD:** Typically refers to the terminal and bushing style (Standard threaded bushing with PCB pins). * **-R:** Generally signifies compliance with **RoHS** (Restriction of Hazardous Substances) standards. --- ### 3. Key Components & Materials To understand the "parts" of this electronic component, it is helpful to look at its construction: 1. **Actuator (Lever):** Usually made of chrome-plated brass. This is the part the user flips. 2. **Bushing:** The threaded part that allows the switch to be secured to a panel (if using a nut). 3. **Housing:** A high-temperature diallyl phthalate (DAP) case which provides excellent insulation. 4. **Contacts:** Moving and stationary contacts made of silver or gold-plated copper alloy to ensure low contact resistance. 5. **Terminals:** PCB pins designed for soldering directly into a printed circuit board. --- ### 4. Common Applications Due to its small footprint and SPDT configuration, the MA12TBD-R is frequently used in: * **Audio Equipment:** To toggle between input sources or bypass circuits. * **Telecommunications:** For signal routing. * **Instrumentation:** Power on/off switches for handheld testing devices. * **Industrial Controls:** Low-power logic switching. ---