The **MA12TAG-R** is a specific model within a series of miniature, high-performance toggle switches, typically manufactured by companies like **Copal Electronics** (now part of Nidec Components). These components are designed for PCB mounting where space is limited but high reliability is required. --- ## 1. Technical Specifications The model number encodes specific physical and electrical characteristics. Here is a breakdown of the typical specifications for the MA series: | Parameter | Specification | | :--- | :--- | | **Switch Function** | SPDT (Single Pole Double Throw) | | **Operation** | ON-ON (2 positions) | | **Contact Rating** | Typically 0.4VA Max @ 28V AC/DC (Logic Level) | | **Contact Resistance** | 20 mΩ Max | | **Insulation Resistance** | 1,000 MΩ Min | | **Dielectric Strength** | 500V AC for 1 minute | | **Mechanical Life** | 50,000 Cycles | | **Mounting Type** | Through-hole (Right Angle / PC Mount) | --- ## 2. Part Number Breakdown (MA12TAG-R) While manufacturers vary slightly, the "MA" series code generally follows this logic: 1. **MA**: Series designation (Miniature/Sub-miniature Toggle). 2. **1**: Number of poles (1 = Single Pole). 3. **2**: Number of positions/Circuitry (2 = 2-position, ON-ON). 4. **T**: Actuator style (Standard Toggle). 5. **A**: Terminal Type (PC terminals / Right angle configuration). 6. **G**: Contact Material (Gold plating, ideal for low-current logic levels). 7. **-R**: RoHS compliance (Lead-free and environmentally regulated). --- ## 3. Key Electronic Features ### Gold-Plated Contacts ("G") The "G" suffix indicates gold-over-nickel plating. Unlike silver contacts, gold does not oxidize easily. This is crucial for **logic-level switching** (low voltage/low current), where an oxide layer on silver would prevent the circuit from closing. ### Right-Angle Orientation The "A" or "TAG" designation often refers to the **Right Angle PCB mount**. This allows the toggle actuator to protrude from the side of a device or a front panel while the switch body sits flat on the horizontal circuit board. ### Environmental Sealing Most MA series switches feature an internal O-ring or epoxy terminal seal. This prevents flux, solder, or cleaning contaminants from entering the internal mechanism during the PCB assembly process. --- ## 4. Typical Applications * **Handheld Instruments:** Power or mode selection in battery-operated devices. * **Telecommunications:** Signal routing in networking hardware. * **Medical Electronics:** Interface controls for diagnostic equipment. * **Audio/Video:** Input selection or gain toggles. ---