What this MCCB delivers
The Siemens SENTRON 3VA2025-6HN32-0AA0 is a 3-pole molded case circuit breaker rated for 25 A continuous current across the full ambient range of 40 °C to 70 °C — no derating needed up to that ceiling. Its interrupting capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V — figures that cover most low-voltage fault scenarios in industrial distribution. The ETU350 electronic trip unit provides adjustable overload and short-circuit protection, making this a line-protection breaker suited for feeder circuits in panelboards and switchgear.
Mounting and integration
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard SENTRON 3VA footprint that fits existing DIN-rail or screw-mount panel layouts without rework. Front face carries IP40 protection, sufficient for enclosed panel environments; no additional sealing required for typical industrial control cabinets. Rated insulation voltage of 800 V aligns with 690 V system applications, and the 300 A maximum/minimum frame rating indicates this is a 300 A frame size, not a 25 A frame — meaning the physical footprint is the same as higher-current siblings in the same frame.