Line protection MCCB with ETU320 — 25 A fixed at 4 poles
The Siemens SENTRON 3VA2125-8HL42-0AA0 is a 4-pole molded case circuit breaker (MCCB) designed for line protection, carrying a rated continuous current of 25 A and an adjustable overcurrent release range from 38 A minimum to 300 A maximum via the ETU320 electronic trip unit. Breaking capacity reaches 440 kA at 240 V AC, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V — numbers that define where this breaker can be applied without cascading upstream in a fault scenario. Rated insulation voltage is 800 V, and the front face carries IP40 protection — suitable for enclosed panel mounting where the front is operator-accessible but not washdown.
Physical fit — panel and enclosure integration
Dimensions are 86 mm deep, 140 mm wide, and 181 mm high — a 4-pole MCCB footprint that fits standard Siemens SENTRON 3VA panel-mounting cutouts and busbar systems. No undervoltage release, no communication function, and no ground-fault monitoring version fitted on this variant — it is a straight line-protection breaker with the ETU320 electronic trip.