ECSW Series - Current Sensor

Series: ECSW
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The ECSW Series of single-phase, AC window, current sensors includes adjustable overcurrent and undercurrent trip points. Detects locked rotor, jam, loss of load, an open heater or lamp load, a broken belt, or loss of suction. LED’s aid in trip point adjustment and provide fault indication. The built-in toroidal sensor eliminates the need for an external current transformer. The output can be electrically latched after a fault, or automatically reset. Remote resetting of a latched output by removing input voltage. The unit includes switch selectable zero current detection and normally de-energized or energized output operation. Time delays are included to improve operation and eliminate nuisance tripping.


See datasheet for operation detail.

Product Literature

For Technical Questions

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		Time Delay RangeTermination TypeMounting MethodDimensionsWeight (lbs/g)CircuitryHumidityInput AC Line Frequency (Hz)Input Tolerance (%)Insulation ResistanceLifeOutput Load Rating (VA)Output TypeStockSamplesCompare
ECSW3LABT24 VdcIsolated SPDT0.15 - 7 s adjustable0.197 in. (5 mm) terminal blocks for up to #12 (3.2 mm²) AWG wireSurface mount with two #6 (M3.5 x 0.6) screws3.5 H x 2.5 W x 1.75 D in. (88.9 x 63.5 x 44.5 mm)0 Kg95% non-condensing-15% - 20%≥10010 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/2 hp @ 250 VacElectromechanical relayCheckOrder
ECSW4HBHT120 VacIsolated SPDT0.5 - 50 s adjustable0.197 in. (5 mm) terminal blocks for up to #12 (3.2 mm²) AWG wireSurface mount with two #6 (M3.5 x 0.6) screws3.5 H x 2.5 W x 1.75 D in. (88.9 x 63.5 x 44.5 mm)0 Kg95% non-condensing50 / 60-20% - 10%≥10010 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/2 hp @ 250 VacElectromechanical relayCheckOrder
ECSW4LADT120 VacIsolated SPDT0.15 - 7 s adjustable0.197 in. (5 mm) terminal blocks for up to #12 (3.2 mm²) AWG wireSurface mount with two #6 (M3.5 x 0.6) screws3.5 H x 2.5 W x 1.75 D in. (88.9 x 63.5 x 44.5 mm)0 Kg95% non-condensing50 / 60-20% - 10%≥10010 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/2 hp @ 250 VacElectromechanical relayCheckOrder
ECSW4LBHT120 VacIsolated SPDT0.5 - 50 s adjustable0.197 in. (5 mm) terminal blocks for up to #12 (3.2 mm²) AWG wireSurface mount with two #6 (M3.5 x 0.6) screws3.5 H x 2.5 W x 1.75 D in. (88.9 x 63.5 x 44.5 mm)0 Kg95% non-condensing50 / 60-20% - 10%≥10010 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/2 hp @ 250 VacElectromechanical relayCheckOrder
ECSW4MACT120 VacIsolated SPDT0.15 - 7 s adjustable0.197 in. (5 mm) terminal blocks for up to #12 (3.2 mm²) AWG wireSurface mount with two #6 (M3.5 x 0.6) screws3.5 H x 2.5 W x 1.75 D in. (88.9 x 63.5 x 44.5 mm)0 Kg95% non-condensing50 / 60-20% - 10%≥10010 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/2 hp @ 250 VacElectromechanical relayCheckOrder
ECSW4MBGT120VACIsolated SPDT0.5 - 50s adjustable0.197 in. (5 mm) terminal blocks for up to #12 (3.2 mm2) AWG wireSurface mount with two #6 (M3.5 x 0.6) screws3.50 x 2.50 x 1.75 in. (88.9 x 63.5 x 44.5 mm)≅6.4oz (181g)Encapsulated95% relative non-condensing-20% - 10%≥100 MΩMechanical - 1 x 106; Electrical - 1 x 10510A resistive @ 240VAC; 1/4 hp @ 125VAC; 1/2 hp @ 250VACElectromechanical relay
ECSW4MBHT120 VacIsolated SPDT0.5 - 50 s adjustable0.197 in. (5 mm) terminal blocks for up to #12 (3.2 mm²) AWG wireSurface mount with two #6 (M3.5 x 0.6) screws3.5 H x 2.5 W x 1.75 D in. (88.9 x 63.5 x 44.5 mm)0 Kg95% non-condensing50 / 60-20% - 10%≥10010 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/2 hp @ 250 VacElectromechanical relayCheckOrder
ECSW6MBHT230 VacIsolated SPDT0.5 - 50 s adjustable0.197 in. (5 mm) terminal blocks for up to #12 (3.2 mm²) AWG wireSurface mount with two #6 (M3.5 x 0.6) screws3.5 H x 2.5 W x 1.75 D in. (88.9 x 63.5 x 44.5 mm)0 Kg95% non-condensing50 / 60-20% - 10%≥10010 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/2 hp @ 250 VacElectromechanical relayCheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
ECSW6MBHT WINDOW CURRENT SENSOR RoHS No 05/14/2021 PbFree No 05/14/2021 CoC_RoHS9_ECSW6MBHT Yes
05/14/2021
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