DC Solid State Relay SSR-40DD. Features: Optical isolation between the control loop and the load loop. Thyristor output with zero current shutdown and zero crossing. Use a suitable radiator when operating; add forced air cooling if necessary. Control signals are compatible with TTL logic. Flame retardant engineering plastic shell with metal base plate. Specifications: Place of Origin: Mainland China. Contact Form: Normally Open. Power Mode: Direct Current. Input Parameters: Control Voltage: 3-32VDC. Input Current: 10mA. LED On/Off Time: 10ms. Reliable Shutdown Voltage: Less than 0.8VDC. Output Parameters: Output Voltage Range: 12-480VDC. Maximum Withstand Voltage: 1700VDC. Rated Operating Current: 10A, 15A, 25A, 40A, 60A, 80A, 100A. On-state Voltage Drop: 0.70V. Minimum On Current: 50mA. Off-state Leakage Current: 10mA. Maximum Inrush Current (10ms): 10 times rated operating current. Performance Parameters: Isolation Withstand Voltage: 2500VAC (1 minute). Insulation Voltage: 2500V. Insulation Resistance: 100MΩ. Operating Temperature: -35°C to +75°C. Power Frequency: 50/60Hz. Heat Dissipation Requirements: Radiator required for 25A; fan cooling recommended for 40A and above. Load Current Safety Factor: 50% for resistive loads, 30% for inductive loads. Derate for frequent switching or harsh environments. Dimensions: 65.5mm (L) x 45.0mm (W) x 23.5mm (H). This product ships from an international warehouse. Please allow up to 14 business days for delivery due to current global shipping delays.