Its ETU850 electronic trip unit provides adjustable protection curves and communication capability, making it suitable for selective coordination in industrial power systems where fault discrimination is critical. Breaking capacity reaches 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 17 kA at 690 V — figures that define the maximum fault current it can safely interrupt without upstream damage.
The 630 A rating holds at 40 °C ambient; above that, derate linearly: 600 A at 45 °C, 570 A at 50 °C, 540 A at 55 °C, 510 A at 60 °C, 480 A at 65 °C, and 450 A at 70 °C. In a warm enclosure, the effective continuous current drops — size the breaker for the actual ambient, not the nameplate. Maximum power loss is 164.5 W, which contributes to enclosure heat load.
Auxiliaries and integration
The basic switch is 3VA2463-5KP32-0AA0; the integrated auxiliary trip is 3VA9608-0BB25. The trip indicator is present, and the unit supports communication functions for remote monitoring. No phase failure detection or ground fault monitoring is built in; those functions require external modules.