Littelfuse 201A-AU is a versatile and reliable voltage monitoring relay suitable for various applications. It features an output load rating of 480 VA @ 240 Volts B300 for pilot duty and 10 A @ 240 Volts for general purpose. With an input AC line frequency of 50/60 Hz, it can operate effectively in most power systems. The device has a wide humidity range of 10 - 95% non-condensing and complies with IEC 68-2-3 standards. It offers adjustable trip delay ranging from 1 to 30 seconds for under/over and unbalance voltage, as well as 1 second fixed for single-phase faults. The product supports a maximum input power of 5 VA. The restart delay range is adjustable between 1 to 500 seconds, and undervoltage reset voltage is set at 93%. The voltage unbalance trip point is adjustable between 2-8%, while the overvoltage trip voltage is set at 110%. The voltage unbalance reset is set at trip setting minus 1% for 5-8% and trip setting minus 0.5% for 2-4%. It offers a ±1% trip point accuracy. Moreover, the product has an overvoltage reset voltage of 107%.