The Siemens SENTRON 3VA1225-5EF32-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 250 A at 40 °C through 50 °C without derating — at 55 °C it still holds 243.3 A, dropping to 223 A at 70 °C, so the thermal curve stays flat across typical panel ambient. The interrupting ratings are what decide panel SCCR: 187 kA at 240 V AC, 121 kA at 415 V AC, 36 kA at 440 V AC, and 17 kA at 690 V AC — the 415 V figure is the one most European industrial panels will reference for fault current coordination.
The 3VA1225-5EF32-0KH0 measures 70 mm deep, 105 mm wide, and 158 mm high — a standard SENTRON 3VA frame size that fits DIN-rail or screw-mount panel layouts. The 105 mm width is the critical fill-factor dimension for multi-breaker rows; at 250 A continuous, it occupies the same footprint as lower-rated 3VA frames, so a panel originally laid out for a 160 A or 200 A 3VA unit will accept this breaker without re-drilling the mounting plate. The shunt trip (STL) release is factory-installed; verify the coil voltage matches the control circuit before wiring.
The product designation is molded case circuit breaker under the SENTRON brand.