The **MA2L1FBA-R** is a specific electronic component primarily identified as a high-precision, sub-miniature **Pushbutton Switch** manufactured by **C&K Components** (now part of Littelfuse). Below is a detailed breakdown of its specifications, design features, and typical applications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Switch Type** | Pushbutton (Momentary) | | **Circuit Type** | SPDT (Single Pole Double Throw) | | **Switch Function** | On-Mom (Normally Open/Normally Closed) | | **Contact Rating** | 100mA @ 30V DC | | **Contact Resistance** | < 50 mΩ | | **Mechanical Life** | 100,000 Cycles | | **Mounting Type** | Through-hole (PCB) | | **Actuator Style** | Round, Plunger | --- ### 2. Physical and Design Features The "MA" series is known for its compact footprint, making it ideal for high-density printed circuit boards (PCBs). * **Sub-miniature Size:** Designed to occupy minimal board space. * **Tactile Feedback:** Despite its small size, it provides clear tactile feedback to the user, indicating the switch has been successfully actuated. * **Sealing:** These switches often feature a level of environmental protection (depending on the specific sub-series variant) to prevent flux contamination during soldering. * **Material:** Usually constructed with gold-plated contacts to ensure high reliability in low-current switching applications. --- ### 3. Part Number Breakdown (Typical C&K Logic) While full internal codes vary, the prefix and suffix generally indicate: * **MA:** Series identifier (Sub-miniature Pushbutton). * **2L:** Often refers to the specific plunger length or travel distance. * **FBA:** Refers to the contact material (e.g., gold) and the specific terminal style. * **-R:** Generally indicates **RoHS Compliance** (Restriction of Hazardous Substances). --- ### 4. Typical Applications Because of its high reliability and small size, the MA2L1FBA-R is commonly found in: 1. **Telecommunications:** Network routers, switches, and handheld communication devices. 2. **Instrumentation:** Control panels for medical devices or laboratory testing equipment. 3. **Consumer Electronics:** Reset buttons or mode-selection buttons in portable electronics. 4. **Industrial Controls:** Used as "Limit" or "Function" switches within larger automated systems. ---