The **7101T1CWCME** is a specific part number for a subminiature toggle switch manufactured by **C&K** (now part of Littelfuse). This part belongs to the **7000 Series**, which is widely used in industrial, medical, and telecommunications equipment. --- ## Technical Specifications Breakdown The part number follows a modular coding system. Here is the breakdown of the electronic and mechanical characteristics: | Code Segment | Feature | Description | | :--- | :--- | :--- | | **7101** | Function | **SPDT** (Single Pole, Double Throw) - On-None-On | | **T1** | Actuator | 0.487" high, large toggle (Standard round bat) | | **CW** | Bushing | Threaded, 0.250" diameter, with a "Flat" keyway | | **C** | Terminations | **PC Thru-hole** (Printed Circuit Board mounting) | | **ME** | Contact Material | **Gold over Silver** (RoHS Compliant, Power/Logic level) | --- ### 1. Electrical Ratings The contact material "ME" indicates a versatile switch that can handle both low-level signals and power: * **Power Level:** 5 Amps @ 120 V AC or 28 V DC; 2 Amps @ 250 V AC. * **Logic Level:** 0.4 VA max @ 20 V AC or DC max. * **Contact Resistance:** Below 10 mΩ typ. initial @ 2-4 V DC, 100 mA. * **Insulation Resistance:** $10^9$ Ω minimum. * **Dielectric Strength:** 1,000 Vrms minimum at sea level. ### 2. Mechanical Construction * **Operating Temperature:** -30°C to 85°C. * **Mechanical Life:** 40,000 make-and-break cycles. * **Bushing:** The "CW" designation typically implies a splash-proof or internal O-ring seal to provide basic environmental protection against dust and moisture. ### 3. Circuit Configuration (SPDT) The **7101** indicates a basic On-On function. It has three terminals: 1. **Terminal 2 (Common):** The input. 2. **Terminal 1 & 3:** The outputs. * When the toggle is in Position 1, Terminal 2 is connected to Terminal 3. * When the toggle is in Position 3, Terminal 2 is connected to Terminal 1. --- ## Common Applications Because of its high reliability and gold/silver plating, this switch is often found in: * **Control Panels:** Industrial automation interfaces. * **Instrumentation:** Test and measurement devices. * **Telecommunications:** Network switching equipment. * **Medical Equipment:** Diagnostic and surgical tools.