Siemens 3VM1450-5GD42-0AA0 — 500 A SENTRON MCCB with TM210 Release
The Siemens 3VM1450-5GD42-0AA0 is a 4-pole SENTRON molded case circuit breaker rated for 500 A continuous at 40 °C, using a TM210 thermal-magnetic overcurrent release. This is a line-protection design — no undervoltage release, no ground-fault monitoring, no communication module — built for straightforward branch-circuit and feeder protection in LV distribution panels. Interrupting capacity is the headline: 187 kA at 240 V AC, 121 kA at both 415 V and 440 V, and 76 kA at 500 V. That puts it in the high-fault region — suitable for service-entrance or main-switch positions where available fault current exceeds 100 kA. The 500 A continuous frame means it can feed a large motor control center or a sub-distribution board without needing a fused disconnect upstream. Thermal derating is published: the breaker holds 500 A from 40 °C through 50 °C, then steps down to 488 A at 55 °C, 476 A at 60 °C, 464 A at 65 °C, and 452 A at 70 °C. If your panel ambient runs above 50 °C, size the load side accordingly — the 500 A rating is not valid at elevated temperatures without applying the derating curve.
Sourcing & Lifecycle — Active Production, Quoted to Order
For a BOM-freeze or panel-shop buying this MCCB in quantity, the active lifecycle means no forced redesign for the foreseeable future. The TM210 release is a standard thermal-magnetic type, widely accepted in IEC 60947-2 installations across Europe, Asia, and the Middle East.
Dimensions & Panel Fit — 110 mm Depth, 184 mm Width
Physical footprint: 248 mm height, 184 mm width, 110 mm depth. The 184 mm width is the critical dimension for DIN-rail or mounting-plate layout — it occupies roughly 7.24 inches of rail space. Depth of 110 mm (4.33 in) means the breaker body projects about 4.3 inches from the mounting surface, which matters when sizing gland plates or rear-panel clearance in shallow enclosures. Front protection is IP40 — suitable for general indoor panel environments where tools or fingers might contact the front face, but not rated for washdown or dust ingress. The 4-pole design with 100% N-conductor protection means the neutral pole is fully rated and switches with the phases, common in TN-S or TN-C-S systems where the neutral must be disconnected.
Comparison with 3VA1112-5EE32-0AA0 — Frame Size and Rating Difference
The closest functional peer in the SENTRON family is the 3VA1112-5EE32-0AA0, but it is a fundamentally different frame size. The 3VM1450-5GD42-0AA0 is a 500 A frame with 187 kA interrupting capacity; the 3VA1112-5EE32-0AA0 is a smaller 100 A frame with lower interrupting ratings. They are not panel-drop-in interchangeable — the 3VM1450 requires wider bus spacing, larger lug landing area, and more enclosure volume. If your panel was specified around the 3VA1112, the 3VM1450 will not fit without re-engineering the bus bars and enclosure.