The **7101L41CWCBE** is a specific part number for a miniature toggle switch manufactured by **C&K** (now part of Littelfuse). This component is widely used in industrial control panels, medical devices, and high-end audio equipment due to its sealing and durability. --- ## 1. Part Number Breakdown The nomenclature follows C&K’s 7000 Series standard. Here is the breakdown of the specifications: | Code | Segment | Description | | :--- | :--- | :--- | | **7101** | Series/Model | SPDT (Single Pole Double Throw) On-On Switch | | **L41** | Actuator | Flat handle (Lever), 13.49mm (0.531") height | | **CW** | Bushing | Threaded, 1/4-40, with internal O-ring seal | | **CB** | Contact Material | Gold plating over Nickel/Brass (Low power/dry circuit) | | **E** | Seal | Epoxy terminal seal (Bottom) | --- ## 2. Technical Specifications This switch is designed for low-power signal switching rather than high-voltage power mains. ### Electrical Characteristics * **Contact Rating:** 0.4 VA max @ 20 V AC or DC max. * **Contact Resistance:** Below 10 mΩ. * **Insulation Resistance:** $10^9$ Ω minimum. * **Dielectric Strength:** 1,000 Vrms at sea level. ### Physical & Environmental * **Operating Temperature:** -30°C to 85°C. * **Sealing:** IP67 rated. The "CW" designation includes an internal O-ring to prevent dust and water ingress through the front panel. * **Termination:** PC Thru-hole (Straight) with epoxy sealing to prevent flux contamination during soldering. --- ## 3. Key Electronic Components 1. **SPDT Mechanism:** A single input (Common) can be switched between two different outputs. Since it is "On-On," there is no center "Off" position. 2. **Gold Contacts:** Unlike silver contacts which require a "wiping" action to clear oxidation, gold is used here for "Dry Circuits" (very low voltage/current) because it does not corrode. 3. **The Bushing & O-Ring:** The "CW" variant is specifically designed for splash-proof applications, making it suitable for outdoor handheld devices or medical environments where sanitization is required. --- ## 4. Wiring Diagram (SPDT) The back of the switch typically features three pins: ```text [1] (Output A) [2] (Common / Input) [3] (Output B) Position Up: Connects Pin 2 to Pin 3 Position Down: Connects Pin 2 to Pin 1 ```