201A AU Series - 3-Phase Voltage/Phase Monitor

Series: 201A AU
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The 201A-AU is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-480VAC, 50/60Hz motors regardless of size. Has user adjustable 1-30 second trip delay, manual or 1-500 second restart delay, and 2-8% voltage unbalance trip point. The product also provides a user selectable nominal voltage setpoint and the voltage monitor automatically selects between the 200V and 400V range. The Model 201A-AU includes advanced single LED diagnostics, where five different light patterns distinguish between faults and normal conditions.

This unique microcontroller-based voltage and phase-sensing device constantly monitors the 3-phase voltages to detect harmful power line conditions. When a harmful condition is detected, the 201A-AU's output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to acceptable levels.

Product Literature

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Call +1 800-832-3873 or email us at relays@littelfuse.com 

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)		Output
Form		Mounting MethodDimensionsWeight (lbs/g)HumidityInput AC Line Frequency (Hz)Maximum Input PowerOutput Load Rating (VA)Overvoltage Reset Voltage (%)Overvoltage Trip Voltage (%)Restart Delay RangeStorage Temperature (F/C)Trip Delay RangeTrip Point Accuracy (%)StockSamplesCompare
201-575-AU-OT475 - 600 VacForm CDIN rail or surface mount (plug into OT08-PC socket)1.75 H x 2.38 W x 4.13 D in. (44.5 x 60.3 x 104.8 mm)0 Kg10 - 95% non-condensing per IEC 68-2-350 / 605Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac107%110%Manual; 1 - 500 s adjustable-40° to 80°C (-40° to 176°F)Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed±1%CheckOrder
201575-AU475 - 600 VacForm CDIN rail or surface mount (plug into OT08-PC socket)1.75 H x 2.38 W x 4.13 D in. (44.5 x 60.3 x 104.8 mm)0 Kg10 - 95% non-condensing per IEC 68-2-350 / 605Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac107%110%Manual; 1 - 500 s adjustable-40° to 80°C (-40° to 176°F)Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed±1%CheckOrder
201A-AU190 - 480 VacForm CDIN rail or surface mount (plug into OT08-PC socket)1.75 H x 2.38 W x 4.13 D in. (44.5 x 60.3 x 104.8 mm)0 Kg10 - 95% non-condensing per IEC 68-2-350 / 605Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac107%110%Manual; 1 - 500 s adjustable-40° to 80°C (-40° to 176°F)Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed±1%CheckOrder
201A-AU-OT190 - 480 VacForm CDIN rail or surface mount (plug into OT08-PC socket)1.75 H x 2.38 W x 4.13 D in. (44.5 x 60.3 x 104.8 mm)0 Kg10 - 95% non-condensing per IEC 68-2-350 / 605Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac107%110%Manual; 1 - 500 s adjustable-40° to 80°C (-40° to 176°F)Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed±1%CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
201A-AU 3-PHASE PLUG-IN VOLT MON/ 190- RoHS No 12/14/2020 PbFree No 12/14/2020 CoC_RoHS9_201A-AU Yes
12/14/2020
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