SENTRON 3VA2140-7HM46-0AA0 — 40 A MCCB with Adjustable Trip and High Interrupting Capacity
The Siemens SENTRON 3VA2140-7HM46-0AA0 is a 4-pole molded case circuit breaker rated for 40 A continuous current at 40 °C through 70 °C, with a thermal-magnetic trip adjustable from 60 A minimum to 480 A maximum. Its interrupting capacity reaches 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V — figures that govern fault-clearing capability at the service-entrance or distribution point. Designed for line protection, this MCCB sits in the main or feeder position of a panelboard or switchboard, not as a branch device.
The 60–480 A adjustable trip range means this breaker can be set to protect a 60 A feeder or a 480 A main, but the 40 A continuous rating is the thermal limit — the frame and contacts are sized for 40 A continuous load, and the higher trip setting only applies to the magnetic (short-circuit) pickup. For a 40 A continuous load, the thermal element should be set near 40 A; the magnetic adjustment then determines the instantaneous trip threshold.
Lifecycle and Sourcing — Current Production, Quoted to Order
No official successor has been published, so the 3VA2140-7HM46-0AA0 remains the direct fit for any panel originally specified with this code.
Ground-Fault Monitoring and Environmental Limits
The ground-fault monitoring version uses summation current formation on the L + N conductor — it measures vector sum of line and neutral currents to detect leakage to ground. Maximum power loss is 1.6 W, negligible for panel thermal budgeting. The trip indicator is not present, so no local mechanical flag shows a trip event — the breaker relies on the handle position or an external auxiliary contact (not included).