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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 DC2. Contact Rating: 30A/14V DC or 21A/120V AC3. 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 Characteristics1. Input Voltage: 12V DC2. Input Current: 40mA ± 10%3. Contact Voltage: 14V DC or 120V AC4. Contact Current: 30A (DC) or 21A (AC)Physical Characteristics1. Package Type: Plastic case with 5 pins2. Dimensions: 29.5 x 19.5 x 15.5mm3. Weight: 15g (approx.)Applications1. 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.Benefits1. High Reliability: Long lifespan and high switching cycles2. Low Power Consumption: Low input current and voltage3. High Isolation: Electrical isolation between input and output4. Easy to Use: Simple wiring and control scheme