Siemens 5SL4202-8 SENTRON MCB — 2-pole D-curve 2 A for inductive and motor-start loads
The D-curve means it tolerates the inrush current of motor loads, transformers, or inductive equipment without nuisance tripping — the magnetic trip fires between 10× and 20× rated current, so a 2 A breaker holds through the start-up spike of a fractional-horsepower motor or a small solenoid bank.
Breaking capacity and voltage ratings — selectivity and SCCR headroom
Maximum operating voltage is 440 V AC in multi-phase operation, covering 400 V three-phase systems with headroom for nominal line variations. Compared to the C-curve 5SL6220-7 (same 2-pole, 2 MW, but 6 kA breaking capacity), the 5SL4202-8 offers the higher 10 kA rating and the D-curve — the choice hinges on whether your downstream load is resistive (C) or inductive/motor (D), and whether your available fault current exceeds 6 kA.
Integration and mounting — DIN-rail fit, sealable, supplementary devices
Sealable design (padlockable toggle) for lockout/tagout compliance; halogen-free and silicon-free construction for environments sensitive to outgassing (clean rooms, food processing).