Littelfuse TRDU12D1 is an octal 8-pin plug-in device with an output load rating of 10 A resistive at 120/240 V ac and 28 V dc, or 1/3 hp at 120/240 V ac. It has an input tolerance of -15% to 20%, repeat accuracy of ±0.1% or 20 ms, and insulation resistance of ≥100. With a power consumption of ≤2 W and reset time of ≤50 ms, this microcontroller-based time delay relay offers a setting accuracy of ±1% or 50 ms. It has two LEDs for indicating input voltage and output relay status, and its adjustment type is a multiplier with 3 position DIP switches. It also provides the option of twenty-one single or dual functions with its five switches for time delay options. The TRDU12D1 has a long electrical and mechanical life, with electrical life at 1 x 10⁶ and mechanical life at 1 x 10⁷. Designed for convenience and reliability, this device ensures protection against reverse polarity for DC units.