Littelfuse, Inc. Monitor - Relay Output ECSW4LADT

The ECSW4LADT is a single-phase AC window current sensor for over- and undercurrent protection, operating from 120VAC with a current range of 0.5 to 5 A. It features a built-in toroidal sensor, adjustable trip delay from 0.15 to 7 s, and a 2 s sensing delay on startup. Output is an isolated SPDT relay rated at 10A resistive at 240VAC, with switch-selectable latching or auto-reset operation and zero current detection. Terminal blocks accept up to #12 AWG wire. Visual LEDs indicate fault status and adjustment. The unit is surface-mounted, measuring 88.9 mm H × 63.5 mm W × 44.5 mm D, and is encapsulated for shock, vibration, and humidity resistance. It meets IEEE C62.41-1991 Level A surge standards and operates from -40°C to 60°C.