It is designed for starter protection in motor branch circuits and general distribution panels. Its interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V, tapering to 30 kA at 500 V and 4.5 kA at 690 V — giving it strong selectivity headroom in low-voltage switchgear, especially at the 415 V common in industrial distribution.
Derating begins at 55 °C (194 A), dropping to 176 A at 70 °C. This matters when the breaker is enclosed in a crowded panel with limited airflow — the 70 °C curve applies in a typical NEMA 12 enclosure with multiple devices. Physical footprint: 105 mm wide, 158 mm high, 70 mm deep.
Auxiliary switch configuration and trip indication
The trip alarm signals a fault condition separate from manual open/close — useful for remote annunciation in a PLC-driven system.