What this MCCB is and what it does
The Siemens SENTRON 3VA2325-5MN32-0CL0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuously from 40 °C all the way up to 70 °C — no derating needed across that range. It's designed specifically for motor protection, with built-in phase failure detection and an undervoltage release (UVR) as standard. That UVR means if the control voltage drops, the breaker trips, which is exactly what you want on a motor circuit where a brownout could stall the load and cook the windings. The interrupting capacity is serious: 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V. That covers most industrial low-voltage distribution panels — if your fault current is within those numbers, this breaker clears it without welding its contacts shut. It comes with a full auxiliary switch complement: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch, plus the undervoltage release. That's enough to signal status back to a PLC or annunciator panel without adding external relays.
Mounting and panel fit
At 248 mm high, 138 mm wide, and 110 mm deep, this breaker fits a standard MCCB footprint. The 110 mm depth means it clears most shallow enclosures — you won't need a deep can for this one. No ground-fault monitoring module on this variant (that's the "Without" in the spec), so if you need GFCI, look at the 3VA2 family with the "-0BB0" suffix.
Environmental and thermal limits
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Max power loss is 40 W — that's the heat it dumps into the enclosure, so factor that into your panel cooling if you're packing several breakers side by side.
What's on the basic switch and auxiliary release
The basic switch is order code 3VA2325-5MN32-0AA0 — that's the base MCCB without the auxiliary switches. The 0CL0 variant adds the 2 auxiliary switches, trip alarm, electrical alarm, and undervoltage release. If you're retrofitting a panel that already has a basic switch, you can order the add-on kit separately.