Littelfuse THDB421A is an encapsulated time-delay relay with a 6 A steady state and 60 A inrush output load rating. It features 0.25 in. male quick connect terminals and a wide input AC line frequency range of 50/60 Hz with a tolerance of ±20%. With a humidity resistance of 95% non-condensing and a repeat accuracy of ±0.5% or 20 ms, it ensures reliable performance. The relay has a power consumption of ≤2 VA and a reset time of ≤150 ms. It offers undervoltage trip voltage adjustment from 0.1 to 10 s externally. The THDB421A also provides reliable insulation with a dielectric breakdown of ≥2000V and has a minimal output voltage drop of ≅2.5 V at rated current.