What this MCCB carries in the carton
The Siemens SENTRON 3VA2010-8KP42-0AA0 is a 4-pole molded case circuit breaker rated for 100 A continuous current, fitted with the ETU850 electronic trip unit. It's designed for line protection and includes onboard communication capability — no separate module needed for basic bus connectivity. The front face carries IP40 protection, so it's suited for enclosed panel mounting where tools or fingers won't reach live parts.
Breaking capacity — what the numbers mean for your fault level
This breaker delivers 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. Those are the maximum interrupting ratings at each voltage level — the actual available fault current at your panel's secondary must fall below these to maintain coordination. The 690 V figure is notably lower, so if your system runs at that voltage, verify the SCCR headroom before specifying.
Panel fit — dimensions and mounting
The breaker measures 86 mm deep, 140 mm wide, and 181 mm high. It's a standard SENTRON 3VA frame size, so it drops into the same panel cutout and bus-bar arrangement as other 3VA 4-pole units. No rewiring needed if you're swapping from a sibling with the same pole count and frame — the mounting footprint and terminal spacing are identical.
Trip unit and thermal performance
The ETU850 electronic trip unit provides adjustable overload and short-circuit protection curves. The breaker holds its full 100 A rating across the ambient temperature range from 40 °C through 70 °C — no derating required in a warm enclosure. Maximum power loss is 7.7 W, which is modest for a 100 A frame and keeps internal cabinet heating manageable.