The Siemens 5SL4340-6CC is a 3-pole miniature circuit breaker rated 400 V with a 10 kA interrupting capacity, B-curve trip characteristic, and 40 A current rating. The B-curve (3–5× In) means it trips fast on short circuits but tolerates moderate inrush — typical for resistive and lighting loads, not motor starts. The 3-pole configuration handles three-phase circuits (, L2, L3) with a common trip mechanism — if one phase faults, all three open, which is required for multi-phase motor and heater circuits per IEC 60947-2.
Compliance documentation
RoHS compliant since June 2013. REACH candidate list information is available on request. Export control classification: AL N / ECCN N — no license required for most destinations.