The **WJM-1CE-R** is a specific model of a **Miniature Intermediate Power Relay**, typically manufactured by companies like **Wanjia (WANJIA)**. It is designed for PCB mounting and is used to control higher voltage/current loads using a small electronic signal. --- ## 1. Technical Specifications The following table highlights the core electronic characteristics of the WJM-1CE-R: | Feature | Specification | | :--- | :--- | | **Contact Form** | 1C (SPDT - Single Pole Double Throw) | | **Contact Material** | Silver Alloy (AgSnO2 or AgCdO) | | **Max Switching Current** | 12A to 15A (Load dependent) | | **Max Switching Voltage** | 250VAC / 30VDC | | **Coil Nominal Voltage** | Options: 5V, 9V, 12V, 24V, 48V DC | | **Coil Power Consumption** | Approx. 0.36W to 0.45W | | **Dielectric Strength** | 2,500VAC (between coil and contacts) | | **Operational Life** | 10,000,000 (Mechanical) / 100,000 (Electrical) | --- ## 2. Key Component Parts The WJM-1CE-R consists of several internal electronic and mechanical sub-components: ### A. The Coil (Actuator) * **Function:** The input side of the relay. When DC current flows through this copper winding, it creates a magnetic field. * **Part Note:** The "R" in the suffix often denotes a specific sensitivity or a RoHS compliance standard depending on the manufacturer's series. ### B. The Contacts (Switching Element) * **Common (COM):** The moving terminal. * **Normally Closed (NC):** The terminal the COM touches when the relay is OFF. * **Normally Open (NO):** The terminal the COM touches when the relay is ON. * **Material:** Silver alloy is used to resist "arcing" and welding when switching heavy loads. ### C. The Armature & Spring * A mechanical linkage that pulls the contact toward the electromagnet when energized and returns it to the default position via spring tension when power is removed. --- ## 3. Terminal Layout (Pinout) The "1C" designation confirms a 5-pin configuration: 1. **Pin 1 & 2:** Coil Terminals (Non-polarized, usually). 2. **Pin 3:** Common (COM). 3. **Pin 4:** Normally Closed (NC). 4. **Pin 5:** Normally Open (NO). --- ## 4. Typical Applications * **Home Appliances:** Washing machines, air conditioners, and microwave ovens. * **Industrial Control:** PLC output modules and motor starters. * **Automotive Electronics:** Power windows or lighting control (if using the 12VDC variant). ---