## WJM-1C2-R: Electronic Component Overview The **WJM-1C2-R** is a specific model of a **Miniature Intermediate Power Relay**. These components are widely used in automation, household appliances, and industrial control systems to switch high-power circuits using a low-power control signal. --- ### 1. Key Technical Specifications Based on standard industry data for the WJM series, here are the typical specifications: | Feature | Specification | | :--- | :--- | | **Contact Form** | 1C (1 Form C / SPDT - Single Pole Double Throw) | | **Contact Material** | Silver Alloy (AgSnO2 or AgCdO) | | **Rated Load (Resistive)** | 7A to 12A @ 250VAC / 30VDC | | **Max Switching Voltage** | 250VAC / 110VDC | | **Coil Voltage Options** | 3V, 5V, 6V, 9V, 12V, 24V, 48V DC | | **Coil Power Consumption** | Approx. 0.36W to 0.45W | | **Mechanical Life** | 10,000,000 operations | | **Electrical Life** | 100,000 operations (at rated load) | --- ### 2. Part Number Breakdown Understanding the suffix code helps in identifying the exact variant: * **WJM**: Series designation (Subminiature Power Relay). * **1C**: Contact arrangement. "1C" means it has one set of changeover contacts (Common, Normally Open, and Normally Closed). * **2**: Often refers to the physical size or a specific sensitivity rating (varies by manufacturer). * **R**: Generally indicates **RoHS Compliance** (Restriction of Hazardous Substances) or "Sealed" type construction for wave soldering/cleaning. --- ### 3. Internal Schematic and Pinout The device operates using an electromagnetic coil. When voltage is applied to the coil, it creates a magnetic field that pulls the armature, moving the contact from the **NC (Normally Closed)** position to the **NO (Normally Open)** position. ```text Pin Layout (Typical Bottom View): _____ | 1 2 | <-- Coil Pins | 3 | <-- Common (COM) | 4 5 | <-- 4: NC, 5: NO ------- ``` --- ### 4. Common Applications * **Smart Home Devices:** Used in smart plugs and light switches. * **HVAC Systems:** Controlling fans, motors, or heating elements. * **Industrial Automation:** Acting as an interface between a PLC (Programmable Logic Controller) and a heavy motor or actuator. * **Automotive Electronics:** Powering auxiliary lights or small pumps. ---