The **A111K1CWCQ0Q** is a specific part number for a subminiature toggle switch manufactured by **TE Connectivity (Alcoswitch)**. It is designed for high reliability in compact electronic applications. --- ## 1. Technical Specifications The part number is a coded string that defines the physical and electrical characteristics of the switch. | Feature | Specification | | :--- | :--- | | **Circuit Type** | SPDT (Single Pole Double Throw) | | **Switch Function** | ON-ON (Two positions, latching) | | **Current Rating** | 6A @ 125VAC / 3A @ 250VAC | | **Contact Plating** | Silver (Q) - optimized for power switching | | **Terminal Type** | PC Pin (Through-hole mounting) | | **Actuator Style** | Standard Toggle (Locking/Standard) | | **Bushing Type** | Threaded (for panel mounting) | | **Environmental Rating** | IP67 (Splashproof/Dust-tight) | --- ## 2. Part Number Breakdown Understanding the alphanumeric code helps in identifying variations: * **A111**: Series prefix (Gemini A Series). * **K1**: Refers to the actuator (toggle) style and length. * **CW**: Indicates the bushing style (threaded vs. smooth). * **C**: Indicates PC terminal length/configuration. * **Q**: Contact material (Silver). * **0**: No special hardware or packaging. * **Q**: Standard RoHS compliant finish. --- ## 3. Key Electronic Characteristics ### Contact Configuration (SPDT) The switch has three terminals. In position one, the center pin (Common) is connected to Pin 1. In position two, the center pin is connected to Pin 3. This allows it to toggle between two different circuits. ### Material Science * **Contacts:** Typically silver-plated copper alloy. This provides excellent conductivity but is prone to oxidation in low-signal (dry circuit) applications. It is best used for power switching. * **Housing:** High-temperature Thermoplastic (UL94V-0 rated). * **Seal:** The "CW" variant often includes an O-ring seal in the bushing to prevent liquids from entering the internal mechanism. --- ## 4. Typical Applications Because of its small footprint and IP67 rating, this part is commonly used in: * **Industrial Control Panels:** For environment-exposed equipment. * **Medical Equipment:** Due to high reliability and easy cleaning. * **Test and Measurement:** Compact devices requiring durable input switches. * **Marine Electronics:** Where splash resistance is required.