Littelfuse ESDR421A4 is a compact and encapsulated solid-state relay. It features a 1A steady state output load rating and can handle up to 10A inrush at 45°C. Its termination type includes 0.25 in. male quick connect terminals. The relay operates at an input AC line frequency of 50/60 Hz with a tolerance of ±20%. It has a humidity rating of 95% relative (non-condensing) and offers a repeat accuracy of ±0.1% or 20 ms. The insulation resistance is ≥100. Its setpoint versus ambient temperature and operating voltage has ≤±2% deviation. The relay has a maximum power consumption of ≤2 VA and a time delay tolerance of ≤±5%. Its reset time is ≤150 ms and it boasts a dielectric breakdown of ≥2000V between terminals and mounting surface. The output voltage drop is 2.5V at 1A, and it has an open state leakage current of 2.5A at 230V AC. The relay has an electrical life of 1 x 10⁶ cycles and a mechanical life of 1 x 10⁷ cycles.