The Siemens SENTRON 3VA2125-6HL32-0AA0 is a 3-pole molded case circuit breaker rated for 25 A continuous current, with an ETU320 electronic trip unit designed for line protection. The headline number here is the breaking capacity: 242 kA at 240 V AC, dropping to 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 3.7 kA at 690 V. The 25 A rating holds flat across the full ambient range from 40 °C to 70 °C, so no derating curve to calculate in a warm enclosure. Insulation voltage is rated 800 V, giving headroom for 480 V and 600 V class systems.
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep — a standard SENTRON 3VA frame size that fits existing Siemens MCCB mounting bases and busbar systems. Operating range spans -25 °C to 70 °C, storage from -40 °C to 80 °C.