It carries a 330 kA interrupting capacity at 240 V, stepping down to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 5.25 kA at 690 V — numbers that tell you this breaker is built for high-fault panels where upstream coordination demands extreme short-circuit headroom. The ETU350 electronic trip unit handles the overcurrent release, and an undervoltage release is integrated from the factory. Maximum power loss is 6.5 W.
The 63 A continuous rating holds flat from 40 °C through 50 °C, then derates to 60.6 A at 55 °C and 53.6 A at 70 °C, so ambient temperature inside the enclosure matters when sizing for continuous load. The ETU350 overcurrent release provides electronic trip curves — not the fixed thermal-magnetic of the 3VA1 frame. That matters if you need adjustable long-time, short-time, or instantaneous pickup settings for selective coordination downstream.
Deployment context
The UVR coil draws from the control circuit; verify polarity and voltage rating before energizing.