© 2018 Littelfuse Protection Relays & Controls

www.littelfuse.com/

Rev: 1-A-062716

Protection Relays

Current Monitoring Relays and Transducers

www.littelfuse.com/ecs

ECS SERIES

Ordering Information

MODEL

SENSING

INPUT VOLTAGE

TRIP POINT ADJUSTABLE

TRIP DELAY

SENSING DELAY ON STARTUP

ECS20BC

Selectable, over or undercurrent

24VAC

0.5 - 5A

0.5 - 50s

1s

ECS21BC

Selectable, over or undercurrent

24VAC

2 - 20A

0.5 - 50s

1s

ECS2HBC

Selectable, over or undercurrent

24VAC

5 - 50A

0.5 - 50s

1s

ECS30AC

Selectable, over or undercurrent

24VDC

0.5 - 5A

0.150 - 7s

1s

ECS40A

Selectable, over or undercurrent

120VAC

0.5 - 5A

0.150 - 7s

0s

ECS40AC

Selectable, over or undercurrent

120VAC

0.5 - 5A

0.150 - 7s

1s

ECS40BC

Selectable, over or undercurrent

120VAC

0.5 - 5A

0.5 - 50s

1s

ECS41A

Selectable, over or undercurrent

120VAC

2 - 20A

0.150 - 7s

0s

ECS41AC

Selectable, over or undercurrent

120VAC

2 - 20A

0.150 - 7s

1s

ECS41BC

Selectable, over or undercurrent

120VAC

2 - 20A

0.5 - 50s

1s

ECS41BD

Selectable, over or undercurrent

120VAC

2 - 20A

0.5 - 50s

2s

ECS41BH

Selectable, over or undercurrent

120VAC

2 - 20A

0.5 - 50s

6s

ECS4HBC

Selectable, over or undercurrent

120VAC

5 - 50A

0.5 - 50s

1s

ECS4HBH

Selectable, over or undercurrent

120VAC

5 - 50A

0.5 - 50s

6s

ECS60AH

Selectable, over or undercurrent

230VAC

0.5 - 5A

0.150 - 7s

6s

ECS60BC

Selectable, over or undercurrent

230VAC

0.5 - 5A

0.5 - 50s

1s

ECS61BC

Selectable, over or undercurrent

230VAC

2 - 20A

0.5 - 50s

1s

ECS6HAH

Selectable, over or undercurrent

230VAC

5 - 50A

0.150 - 7s

6s

ECSH21F2.5C

Overcurrent

24VAC

2 - 20A

2.5s

1s

ECSH30AC

Overcurrent

24VDC

0.5 - 5A

0.150 - 7s

1s

ECSH31AD

Overcurrent

24VDC

2 - 20A

0.150 - 7s

2s

ECSH31F.08D

Overcurrent

24VDC

2 - 20A

0.08s

2s

ECSH3HF0.08D

Overcurrent

24VDC

5 - 50A

0.08s

2s

ECSH34F.08C

Overcurrent

24VDC

4A non-adjustable

0.08s

1s

ECSH40A

Overcurrent

120VAC

0.5 - 5A

0.150 - 7s

0s

ECSH40AC

Overcurrent

120VAC

0.5 - 5A

0.150 - 7s

1s

ECSH40AD

Overcurrent

120VAC

0.5 - 5A

0.150 - 7s

2s

ECSH41AC

Overcurrent

120VAC

2 - 20A

0.150 - 7s

1s

ECSH41AD

Overcurrent

120VAC

2 - 20A

0.150 - 7s

2s

ECSH41BC

Overcurrent

120VAC

2 - 20A

0.5 - 50s

1s

ECSH41F.08D

Overcurrent

120VAC

2 - 20A

0.08s

2s

ECSH4HAD

Overcurrent

120VAC

5 - 50A

0.150 - 7s

2s

ECSH4HF.08D

Overcurrent

120VAC

5 - 50A

0.08s

2s

ECSH61AD

Overcurrent

230VAC

2 - 20A

0.150 - 7s

2s

ECSL31A

Undercurrent

24VDC

2 - 20A

0.150 - 7s

0s

ECSL40AC

Undercurrent

120VAC

0.5 - 5A

0.150 - 7s

1s

ECSL40B

Undercurrent

120VAC

0.5 - 5A

0.5 - 50s

0s

ECSL40BH

Undercurrent

120VAC

0.5 - 5A

0.5 - 50s

6s

ECSL41A

Undercurrent

120VAC

2 - 20A

0.150 - 7s

0s

ECSL41AD

Undercurrent

120VAC

2 - 20A

0.150 - 7s

2s

ECSH4HAD

Overcurrent

120VAC

5 - 50A

0.150 - 7s

2s

ECSL41AH

Undercurrent

120VAC

2 - 20A

0.150 - 7s

6s

ECSL4HAC

Undercurrent

120VAC

5 - 50A

0.150 - 7s

1s

ECSL4HBH

Undercurrent

120VAC

5 - 50A

0.5 - 50s

6s

ECSL61AH

Undercurrent

230VAC

2 - 20A

0.150 - 7s

6s

ECSL6HAC

Undercurrent

230VAC

5 - 50A

0.150 - 7s

1s

If you don’t find the part you need, call us for a custom product 800-843-8848

Rev: 1-A-101218