What this MCCB delivers — and what the ratings mean for your panel
The Siemens 3VA2225-5JQ32-0HL0 is a 3-pole SENTRON molded case circuit breaker rated for 250 A continuous current at 40 °C, with an ETU560 electronic trip unit that provides adjustable overload and short-circuit protection. The 187 kA breaking capacity at 240 V means it can safely interrupt a fault current up to that level without upstream devices needing to clear — critical for high-fault installations like transformer secondaries or large motor control centers. At 690 V the interrupting rating drops to 5.1 kA, so verify the available fault current at your service voltage before specifying. The breaker carries a shunt trip release (STL) and auxiliary contacts configured as 2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ. The communication function allows integration with higher-level monitoring systems, though the specific protocol is not detailed here — confirm compatibility with your BMS or PLC network. Temperature derating is linear from 40 °C to 70 °C: the breaker holds 250 A up to 50 °C, then drops to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If your panel ambient runs above 50 °C, size the breaker for the actual load at the operating temperature, not the nameplate 250 A.
Mounting and integration notes
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA footprint that fits existing Siemens panel layouts and DIN-rail adapters. The 3-pole design with line protection version suits feeder and branch-circuit protection in distribution panels, motor control centers, and switchgear assemblies.