201-XXX-SP-DPDT Series - Single-Phase Voltage/Phase Monitor

Littelfuse Voltage Monitoring Relays
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The 201-xxx-SP-DPDT is an 8-pin octal-base, plug-in voltage monitor designed to protect single-phase motors regardless of size. The 201-100-SP-DPDT is used on 95-120VAC, 50/60Hz motors to prevent damage caused by low voltage. The 201-200-SP-DPDT is used on 190-240VAC, 50/60Hz motors. The units feature two isolated sets of contacts that are ideal for use with two control circuits with different voltages.

The unique microcontroller-based voltage and voltage-sensing circuit constantly monitors the voltage to detect harmful power line conditions. When a harmful condition is detected, the relay’s output relays are deactivated after a specified trip delay. The output relays reactivate after power line conditions return to an acceptable level and a specified amount of time has elapsed (restart delay). The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Termination TypeMounting MethodDimensionsWeight (lbs/g)Compare
201-100-SP-DPDT95 to 120VACDPDTTorque: 12 in-lbs; Wire: Stranded or solid 10-22AWGDIN rail or surface mount (plug-in to OT08-PC socket)1.75 in H x 2.38 in W x 4.13 in D (44.5 x 60.3 x 104.8 mm)0.65 lb. (10.4 oz. 294.8 g)
201-200-SP-DPDT190 to 240VACDPDTTorque: 12 in-lbs; Wire: Stranded or solid 10-22AWGDIN rail or surface mount (plug-in to OT08-PC socket)1.75 in H x 2.38 in W x 4.13 in D (44.5 x 60.3 x 104.8 mm)0.65 lb. (10.4 oz. 294.8 g)