What this MCCB carries and where it fits
The Siemens 3VA2025-8KP32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 25 A continuous current on a 3-pole frame, fitted with an ETU850 electronic trip unit. The 440 kA interrupting capacity at 240 V and 330 kA at 415 V mean it can clear high-fault currents without upstream coordination issues in most industrial distribution panels. The 800 V insulation voltage (rated value) supports 480/600 V line-to-line systems with margin. Front IP40 protection is standard for enclosed panel mounting — not rated for washdown or outdoor exposure.
Trip unit and selectivity
The ETU850 is an electronic trip unit with communication and measurement functions — it reports current values and can communicate trip events, which matters for a plant engineer who wants to log fault data or coordinate with upstream breakers. The 25 A continuous rating holds across the full ambient range from -25 °C to 70 °C (no derating needed up to 70 °C). Minimum trip setting is 38 A; maximum is 300 A, giving a wide adjustment band for cable or load protection.
Physical footprint
Dimensions are 181 mm high, 105 mm wide, 86 mm deep. The 105 mm width is a standard 3-pole MCCB footprint for panel cutouts and busbar spacing. Depth of 86 mm leaves clearance for rear-mounted accessories or wiring troughs.