What the ratings mean for fit
The 3VA1025-4ED32-0AH0: The 25 A rating holds flat from 40 °C through 50 °C, then derates gradually to 22.5 A at 70 °C. That thermal curve is the failure-mode gate: if your panel ambient runs above 50 °C, you lose headroom — size the upstream feeder accordingly. The TM210 trip unit is fixed thermal and magnetic; no adjustable long-time or short-time pickup, so coordination with downstream breakers depends on the inherent band. Rated insulation voltage Ui is 800 V, giving margin on 690 V systems. Breaking capacity spans 121 kA at 240 V down to 11.9 kA at 690 V. For a 480 V panel (common in North America), interpolate between the 415 V and 440 V figures — roughly 64 kA. That's enough for most industrial service-entrance or feeder positions without a current-limiting upstream fuse. The auxiliary contact block ships with 2 auxiliary switches plus 1 trip alarm switch (HQ configuration). That's enough for remote status and a separate trip-indication signal back to the PLC or annunciator panel. No undervoltage release, no shunt trip, no communication module — it's a straight thermal-magnetic breaker with basic aux contacts.
Panel fit and integration
Mounts on a DIN rail or can be screw-fixed to a backplate. Width is 76.2 mm (roughly 3 inches per pole), depth 70 mm, height 130 mm — standard 3-pole MCCB footprint for the SENTRON 3VA platform. Front IP40 protects against tool contact in a closed panel; no washdown rating, so keep it inside the enclosure.