Siemens SENTRON 3VA2440-5MN32-0HA0 — 400 A Motor Protection MCCB with Shunt Trip
The Siemens SENTRON 3VA2440-5MN32-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated 400 A continuously at 40 °C, designed specifically for motor protection. It carries a maximum interrupting rating of 187 kA at 240 V AC, with 121 kA at 415 V and 75.6 kA at 500 V — figures that govern its fault-clearing capability on industrial distribution. The design includes phase failure detection and a factory-fitted shunt trip (STL) for remote tripping, but no auxiliary switch or undervoltage release. At 400 A, this MCCB handles the full-load current of a large motor or a feeder feeding multiple smaller motors. The 400 A rating holds across the full 40 °C to 70 °C ambient range — no derating needed up to 70 °C — which simplifies panel layout when the breaker sits near other heat sources. Maximum power loss is 63.5 W, a figure to factor into enclosure thermal calculations. The shunt trip (STL) allows a remote signal (e.g., from an E-stop or PLC) to open the breaker independently of the overcurrent trip mechanism. No auxiliary contacts are included, so if you need status feedback to a control system, plan for an external auxiliary switch block.
Interrupting Capacity — Where It Fits
The 187 kA at 240 V puts this breaker in the high-interrupting category for 240 V systems — suitable for large transformer secondaries or high-fault busways. At 415 V (common in European industrial), 121 kA covers most utility-fed plant mains. The 9 kA at 690 V is a steep drop; on 690 V systems, verify that the available fault current stays under that threshold, or step up to a higher-rated frame.
Integration Notes
Dimensions are 248 mm high × 138 mm wide × 110 mm deep (9.76 × 5.43 × 4.33 in). The 3-pole footprint matches the standard SENTRON 3VA frame; panel cutout and mounting hole pattern follow the 3VA family template. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. The breaker ships as a basic switch (base order code 3VA2440-5MN32-0AA0) with the shunt trip added.