Breaking part for an existing MCCB assembly
The ABB 1SDA068167R1 is a breaking part for the XT2 frame — it replaces the switching mechanism inside an existing molded case circuit breaker housing, not a complete breaker unit. Rated Iu 160 A continuous current, this breaking part handles the thermal and magnetic trip functions for a 3-pole circuit on 690 V systems at 50 or 60 Hz. The interrupting rating Icu of 150 kA at 415 V means it can safely clear a bolted fault up to that level without external fuses — a key spec for high-fault panels where upstream breaker coordination depends on the full withstand.
What the interrupting rating means for panel coordination
Icu 150 kA at 415 V is the ultimate short-circuit breaking capacity — the breaker must be able to interrupt one fault at that level and then be replaced. For selectivity with upstream devices, the actual let-through energy at lower fault levels is what governs coordination; the 150 kA ceiling ensures the breaker itself survives the worst-case fault without catastrophic failure.
Active lifecycle and sourcing posture
Sourced to order against the BOM quantity through independent distribution; availability and current pricing confirmed at RFQ. No official cross-reference or successor — this is the current breaking part for the XT2 160 A frame.