The **MA73FCX-R** is a specific electronic component typically identified as a **tactile switch** (or tact switch) manufactured by companies like **Marushin Electric Mfg**. It is designed for PCB mounting and is commonly used in consumer electronics for user interface control. --- ### 1. Technical Specifications Below are the general electrical and mechanical characteristics of the MA73FCX-R series: | Property | Specification | | :--- | :--- | | **Component Type** | Tactile Switch (Push-to-make) | | **Mounting Type** | Through-hole (Radial lead or standard pins) | | **Contact Arrangement** | SPST (Single Pole Single Throw) | | **Contact Rating** | Usually 12V DC, 50mA | | **Operating Force** | 1.0N to 1.6N (100gf - 160gf) | | **Travel (Stroke)** | ~0.25mm | | **Operating Life** | ~100,000 cycles | --- ### 2. Key Features and Materials The "R" suffix often indicates compliance with environmental standards or specific packaging (like Radial Taping). * **Tactile Feedback:** Provides a distinct "click" sensation to the user when the switch is actuated, confirming the contact. * **Small Footprint:** Designed to occupy minimal space on a Printed Circuit Board (PCB). * **Contact Material:** Typically silver-plated copper alloy to ensure low contact resistance and high reliability. * **Environmental Compliance:** Generally **RoHS compliant**, meaning it is free from hazardous substances like lead and cadmium. --- ### 3. Pin Configuration and Circuitry The device operates as a **Normally Open (NO)** momentary switch. The circuit is only completed while the button is physically depressed. ```mermaid graph LR A[Pin 1] --- B((Switch)) B --- C[Pin 2] style B fill:#f9f,stroke:#333,stroke-width:2px ``` --- ### 4. Common Applications Due to its reliability and small size, the MA73FCX-R is found in various devices: 1. **Consumer Electronics:** Remote controls, microwave panels, and audio equipment. 2. **Computing:** Reset buttons or power buttons on motherboards and peripherals. 3. **Industrial:** Control panels for machinery and instrumentation. 4. **Automotive:** Dashboard controls and steering wheel buttons.