Littelfuse TDR4A22 is an octal 8-pin plug-in time delay relay with an output load rating of 10 A resistive @ 120/240 V ac and 30 V dc. It can handle 1/3 hp @ 230 V ac. The relay offers a repeat accuracy of ±0.1% or 20 ms, insulation resistance of ≥100, and a power consumption of ≤2 VA. With a reset time of ≤150 ms and a recycle time of ≤500 ms, it provides efficient performance. The time delay type is microcontroller-based. This relay has a long life expectancy of electrical: 1 x 10⁵ cycles and mechanical: 1 x 10⁷ cycles. It has undervoltage trip voltage settings from 0.23 s to 1 s increments and an accuracy of ≤±2% or 50 ms. The indication LEDs include an input green LED that turns on when input voltage is applied and a relay red LED that indicates when the output relay energizes.