Siemens 5SL6420-7MB — 4-pole C-curve MCB, 20 A, 6 kA
The Siemens 5SL6420-7MB is a SENTRON 5SL miniature circuit breaker, 4-pole (4P), C-curve, rated 20 A at 400 V AC, with a 6 kA breaking capacity per EN 60898. It's designed for residential and infrastructure branch-circuit protection — the C-curve means it handles moderate inrush (motor starts, capacitor banks) without nuisance tripping, while still clearing a 6 kA fault fast enough to protect downstream wiring.
DIN-rail fit and wiring
Width 72 mm (4 width units), depth 76 mm, installation depth 70 mm. Terminal accepts solid or stranded 0.75 to 25 mm², torque 2.5–3 N·m.
Lifecycle and sourcing
Production status is active — this is a current-catalog SENTRON 5SL6 part. Available through independent distribution; pricing and lead time confirmed against an RFQ.