Littelfuse TDB120AL is an octal 8-pin plug-in time delay relay with an output load rating of 10 A resistive at 120/240 V ac and 28 V dc. It also supports 1/3 hp at 120/240 V ac. The relay has a power consumption of ≤3.25 W and a reset time of ≤50 ms. It operates with an input AC line frequency of 50/60 Hz and an input tolerance of -20% to 10%. The repeat accuracy is ±0.1% or 20 ms, and the setpoint vs ambient temperature and operating voltage is ≤±5%. The relay has a life expectancy of 1 x 10⁶ electrical cycles and 1 x 10⁷ mechanical cycles. It supports undervoltage trip voltage in 1 s increments, with an initiate time of ≤60 ms and a recycle time of ≤150 ms. The time delay type is digital, and there is an LED indication to show when the relay is energized. The setting accuracy is ±2% or 50 ms.