What it is and what it does
The Siemens 3VA2325-5HL32-0CH0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That means it holds its full 250 A rating in a warm panel, which is the spec that matters when you're stacking breakers in a crowded enclosure. Three-pole design, configured for line protection — the standard role for a main or feeder breaker in a distribution panel. Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V. That 187 kA at 240 V is the headline number: it tells you this breaker handles high-fault scenarios at low voltage without needing an upstream current-limiting fuse.
Built-in auxiliaries and release
Comes with 2 auxiliary switches plus 1 trip alarm switch (HQ type) factory-fitted, and an undervoltage release (UVR) built in. That saves panel space and wiring time — no separate accessory kit to order and snap on. The UVR trips the breaker when control voltage drops, which is standard for emergency-stop or undervoltage protection schemes.
Physical fit and environment
Dimensions: 248 mm high, 138 mm wide, 110 mm deep. That 110 mm depth is the key number for enclosure selection — it dictates the minimum cabinet depth for the breaker plus wiring space behind it. Operating temperature range -25 °C to 70 °C, storage from -40 °C to 80 °C. Power loss max 40 W, so factor that into your thermal budget if the panel is tightly packed.