Product identity and key ratings
The Siemens SENTRON 3VA2125-8JP32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection at 25 A continuous, with no derating across the full ambient range from 40 °C to 70 °C — the current rating holds flat at 25 A through 70 °C, which simplifies panel sizing in warm enclosures. Breaking capacity is 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 — these figures govern the available fault current the breaker can safely interrupt at each system voltage level. The ETU550 electronic trip unit provides adjustable overload and short-circuit protection curves, with communication function onboard and an optional motor drive for remote operation.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — the width is the critical panel cutout dimension for a 3-pole MCCB in a SENTRON distribution board or standalone enclosure. Front IP40 means protection against tools and small wires, but not against water ingress; suitable for indoor panel mounting where washdown is not required.
Selectivity and coordination note
The 25 A rating with ETU550 trip unit allows coordination with downstream and upstream breakers. The flat current rating across temperature means no thermal derating factor is needed.