The JQC-3FC(T73) is a 12V DC SPDT relay module, designed for automotive and industrial applications, featuring a high contact rating, low power consumption, and high isolation, making it suitable for controlling high-current devices.1. Operating Voltage: 12V DC 2. Contact Rating: 30A/14V DC or 21A/120V AC 3. Contact Type: SPDT (Single Pole Double Throw) 4. Coil Resistance: 180? ± 10% 5. Switching Time: 10ms (max) 6. Insulation Resistance: 100M? (min) 7. Dielectric Strength: 1500V AC (min) Electrical Characteristics 1. Input Voltage: 12V DC 2. Input Current: 40mA ± 10% 3. Contact Voltage: 14V DC or 120V AC 4. Contact Current: 30A (DC) or 21A (AC) Physical Characteristics 1. Package Type: Plastic case with 5 pins 2. Dimensions: 29.5 x 19.5 x 15.5mm 3. Weight: 15g (approx.) Applications 1. Automotive Systems: Headlights, fog lights, horn, etc. 2. Industrial Control: Motor control, lighting control, etc. 3. Home Automation: Lighting control, security systems, etc. 4. Robotics: Motor control, sensor control, etc. Benefits 1. High Reliability: Long lifespan and high switching cycles 2. Low Power Consumption: Low input current and voltage 3. High Isolation: Electrical isolation between input and output 4. Easy to Use: Simple wiring and control scheme