What this MCCB carries and where it fits
The 3VA1025-3ED46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated 25 A at 40 °C, with a TM210 thermal-magnetic overcurrent release and 4-pole configuration for three-phase-plus-neutral line protection. Breaking capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — enough to handle high-fault industrial distribution panels without cascading upstream. Rated insulation voltage is 800 V, and the front face carries IP40 protection — sealed against tools and fingers, not washdown, so this lives inside a dry enclosure.
Thermal derating and real-world current
Full 25 A holds from 40 °C through 50 °C; at 55 °C it derates to 24 A, and at 70 °C it drops to 23 A. That means a 40 °C panel ambient keeps the full rating, but a hot control room near a kiln or furnace costs you 1–2 A. Maximum power loss is 8.5 W — negligible for panel heat budget, but worth noting if you pack twenty of these in a sealed cabinet.
Mounting and integration
Footprint is 101.6 mm wide, 130 mm tall, 70 mm deep — a standard 4-pole MCCB envelope that fits most DIN-rail or panel-mount backplates without re-drilling. Operating range spans -25 °C to 70 °C; storage from -40 °C to 80 °C. The TM210 release is fixed, no communication module, no undervoltage release — a straightforward thermal-magnetic breaker for basic feeder protection.