What this MCCB is and what it protects
The Siemens SENTRON 3VA2325-5HN32-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at up to 70 °C ambient — meaning it can carry that load without derating across a warm panel environment, not just a climate-controlled one. It is designed for line protection, so its trip curve and interrupting capacity are tuned for feeder and main breaker duty rather than motor or generator protection. Breaking capacity reaches 187 kA at 240 V and 121 kA at 415 V, tapering to 75.6 kA at 500 V and 7.5 kA at 690 V — the high 240 V figure tells you this unit is built for high-fault北美 panels or industrial 480Y/277 V systems where the upstream transformer can deliver serious short-circuit current.
Auxiliary wiring and release configuration
Factory-fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ type) and a shunt trip release (STL). The shunt trip lets you remotely open the breaker from a PLC safety output or E-stop circuit — common in machinery where the MCCB sits upstream of a drive or control transformer and needs to drop out on a stop signal. No undervoltage release or ground-fault monitoring on this variant; if you need UVR or GF protection, you would be looking at a different suffix within the 3VA family.
Physical fit and panel integration
Dimensions are 248 mm high × 138 mm wide × 110 mm deep — a standard SENTRON 3VA frame size that fits the same cutout and bus-bar spacing as other 250 A 3-pole units in the series. Mounts on a DIN rail or directly to a panel backplate via the four corner slots; the 138 mm width occupies 5.43 in of rail space. Maximum power dissipation is 37.5 W at rated current — not negligible in a sealed enclosure; factor that into your thermal budget if the panel also contains drives or transformers.
Lifecycle and sourcing posture
If you are filling a BOM line that calls out the 3VA2325-5HN32-0HH0, the fit is direct — same frame, same aux configuration, same interrupting ratings as the factory order code.
Temperature range and storage limits
Operates from -25 °C to 70 °C ambient, with storage from -40 °C to 80 °C — the storage range is wider because the breaker is not dissipating heat; the operating limit of 70 °C is what governs real panel placement. The 250 A rating holds across the full operating range up to 70 °C — no derating curve to apply for high-temp environments, which simplifies panel design in hot climates or poorly ventilated cabinets.