Motor protection circuit breaker with MicroLogic 2.2 M trip unit
It carries an 85 kA Icu breaking capacity at 500 V AC (50/60 Hz) per IEC 60947-2, which means it can safely interrupt fault currents up to that level without upstream damage — critical for high-fault installations like motor control centers. The MicroLogic 2.2 M electronic trip unit provides L (long-time overload), So (short-time short-circuit with fixed delay), and I (instantaneous short-circuit) protection, with motor tripping classes 20, 5, and 10 selectable to match the thermal curve of the motor load.
The HB1 breaking capacity code (75 kA at 690 V AC) gives this breaker headroom for high-fault applications. At 500 V AC the Icu is 85 kA; at 525 V AC it's 80 kA; at 660/690 V AC it's 75 kA — all per IEC 60947-2. That means the part can be used in systems with available fault current up to those levels, simplifying selective coordination with downstream devices. The utilisation category A (non-selectivity for short-circuit) means it's intended for standalone or cascaded protection rather than full selectivity with an upstream breaker.
IP40 front-face protection and IK07 impact resistance suit enclosed panel environments — not washdown zones, but fine for dry indoor switchgear.
Relative humidity 0–95%. Overvoltage category III (fixed installation). Standards: EN/IEC 60947-2.