What it is and what it does
The Siemens 3VA2025-6HM46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 25 A continuous current across its full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its 4-pole design with line protection suits it for main or feeder protection in distribution panels where ground-fault monitoring via summation current (L + N conductor) is required. The interrupting ratings tell the real story: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V — meaning it clears high-fault scenarios at typical industrial voltages without cascading upstream. No undervoltage release, no trip indicator, no communication module — this is a straightforward thermal-magnetic MCCB for hardwired protection.
Mounting and integration
The 3VA2025-6HM46-0AA0 measures 86 mm deep, 140 mm wide, and 181 mm high — a compact 4-pole footprint that fits standard panel-mount cutouts for SENTRON MCCBs. No DIN-rail clip; it bolts directly to the mounting plate. The 0.84 W maximum power loss keeps heat dissipation minimal inside the enclosure. Rated insulation voltage is 800 V, so it handles 690 V line-to-line applications within IEC 60947-2 margins.