ABB 1SDA071831R1 E4.2S 4000 Ekip Dip LI 4p F HR 85kA Air Circuit Breaker

The ABB 1SDA071831R1 is a SACE Emax 2 E4.2S 4000 Ekip Dip LI 4p F HR air circuit breaker, the selective (S-class) variant of the E4.2 frame, between N and H performance levels. Rated 4000 A (Iu) and 85 kA Icu at 400 V AC, it is a fixed 4-pole unit with rear horizontal terminals and an electronic Ekip Dip LI release for overload (L) and instantaneous (I) short-circuit protection.

Technical Specifications

Selection Notes

The S performance class sits between the N-class (66 kA Icu) and H-class (100 kA Icu) siblings, giving 85 kA Icu at 400 V with a 66 kA/1 s Icw suited to selective coordination with downstream breakers. The Ekip Dip LI release combines L (overload, long-time) and I (instantaneous) functions only — pick the LSI version of this frame if short-time delayed tripping is needed for selective coordination with downstream breakers. Supplied as a complete fixed breaker with rear horizontal terminals, it mounts directly into a vertical busbar connection without a separate cradle — the WMP variant of this same frame covers installations where the switchboard already holds a fixed part. In the 4-pole configuration, this unit suits a 4-wire (with switched neutral) distribution; choose the 3p sibling instead for a phase-only circuit. At 4000 A rated current, this is the 4000 A variant of the E4.2 frame — the frame's 3200 A sibling is the lower-current option where full 4000 A continuous loading is not required.