Its interrupting capacity reaches 220 kA at 240 V, which drops to 154 kA at 415 V and 121 kA at 440 V — figures that matter when coordinating downstream devices in a high-fault panel.
At 240 V the 220 kA SCCR is the headline number, but the real-world selectivity window is at 415 V (154 kA) and 440 V (121 kA). At 500 V and 690 V the rating settles to 17 kA — still adequate for most 480Y/277 V distribution, but the drop tells you this breaker is optimized for low-voltage, high-fault applications rather than 690 V motor circuits.
That's a shallow derating curve — only 2 A lost over a 30 °C rise — which means the thermal-magnetic trip assembly is well-ventilated for a 70 mm deep package. Maximum power loss is 13.1 W, a figure to account for in enclosed panel heat budgets.
The undervoltage release (UVR) is factory-fitted; verify control voltage compatibility before energizing. The auxiliary switch block (2 aux + 1 trip alarm) provides dry contacts for remote status without additional interface relays.