## Overview of WJM-1BG-R The **WJM-1BG-R** is a specific variant of a mechanical/electrical component, typically associated with **Microswitches** or **Limit Switches** often used in industrial controls, home appliances, or automotive assemblies. The suffix "-R" generally denotes specific compliance (like RoHS) or a specific orientation/actuator type (Right-hand or Roller). --- ### Technical Specifications Below are the typical electronic and physical parameters associated with this class of switch: | Parameter | Specification (Typical) | | :--- | :--- | | **Switch Type** | Microswitch / Snap Action | | **Contact Form** | SPDT (Single Pole Double Throw) | | **Current Rating** | 5A to 16A (depending on voltage) | | **Voltage Rating** | 125V / 250V AC | | **Operating Force** | 0.49N to 1.47N | | **Terminal Type** | Solder or Quick Connect (#187) | | **Durability** | 100,000+ Cycles (Electrical) | --- ### Internal Electronic Construction The internal mechanism of the WJM-1BG-R consists of three primary conductive parts: 1. **Common (COM):** The input terminal where power enters the switch. 2. **Normally Closed (NC):** The circuit is complete when the switch is in its resting state. 3. **Normally Open (NO):** The circuit is completed only when the actuator is pressed. #### The Snap-Action Mechanism The "Electronic" part of the switch relies on a **beryllium copper spring**. When the external plunger is depressed, the spring reaches a trip point and "snaps" the contacts from the NC position to the NO position. This rapid movement prevents "arcing," which protects the contacts from burning out under high electrical loads. --- ### Common Applications * **Door Interlocks:** Detecting if a microwave or washing machine door is closed. * **End-of-Travel Sensing:** Used in 3D printers or CNC machines to prevent the motor from moving too far. * **Safety Cut-offs:** Automatically cutting power if a panel is removed from industrial equipment. --- ### Wiring Diagram Example ```text [External Actuator] | V (COM) ----/ ---- (NC) <-- Default Path \ \---- (NO) <-- Path when pressed ```