Siemens 3VA2140-6JQ32-0DH0 — 40 A MCCB with flat thermal derating to 70 °C
The Siemens SENTRON 3VA2140-6JQ32-0DH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a full-scale value of 40 A and a minimum trip setting of 1.5 A. Breaking capacity reaches 242 kA at 240 V, stepping down to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That gives you headroom for high-fault installations without oversizing the frame.
The UVR ensures the breaker trips on loss of control voltage — standard for emergency-stop chains or safety isolation where you need the load guaranteed off when the control supply drops. Communication function is built in, so it can report status to a higher-level system without an add-on module. A trip indicator is present for visual confirmation at the panel face.
Maximum power loss is 4.1 W, which keeps internal enclosure temperature rise manageable even in a densely packed cabinet.