40 A continuous, no derating through 70 °C
The Siemens SENTRON 3VA2140-5MN32-0AF0 is a 3-pole molded case circuit breaker rated for 40 A continuous current across the full operating temperature range from -25 °C to 70 °C — no derating curve to manage, which simplifies panel thermal budgeting. Interrupting capacity reaches 187 kA at 240 V, stepping down to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. Designed for motor protection, with integrated phase failure detection and a trip indicator.
Maximum power loss is 1.6 W, negligible for enclosure thermal calculations.