Littelfuse TSB634 is a compact and efficient thermal time-delay relay. It has a steady state output load rating of 1 A and can handle an inrush current of up to 10 A at 60°C. The relay features 0.25 in. male quick connect terminals for easy installation. It operates at an input AC line frequency of 50/60 Hz with a tolerance of ±20%. With its encapsulated circuitry, it offers excellent protection against moisture with a humidity rating of 95% relative non-condensing. The relay has a repeat accuracy of ±2% or 20 ms, whichever is greater, ensuring reliable and precise operation. It has a high insulation resistance of at least 100 and a setpoint variance of ≤±10% in relation to ambient temperature and operating voltage. With a power consumption of ≤2 VA, it is energy-efficient. The relay offers fast reset times of ≤150 ms and has a time delay tolerance of ±5%. It has a dielectric breakdown rating of ≥2000V between terminals and mounting surface, ensuring safe operation. The relay's output voltage drop is approximately 2.5 V at 1 A, and it has an open state leakage current of approximately 5 A at 230 V AC.