The Siemens 5SL4140-0RC is a 40 A single-pole miniature circuit breaker with a Z characteristic and 10 kA breaking capacity. The Z curve trips between 2.5 and 5 times rated current, designed for semiconductor and control circuit protection where inrush is minimal but short-circuit discrimination matters. It snaps onto a DIN rail in a standard distribution board or sub-panel.
Siemens 5SL4140-0RC MCB, 40A 1P Z-Characteristic 10kA
MPN5SL4140-0RC
Siemens SENTRON 5SL4 series, Miniature Circuit Breaker, 40A, 1-pole, Z characteristic, 10kA breaking capacity, order code 5SL4140-0RC.
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
Product details
Frequently asked questions
What does the Z characteristic mean on this MCB?
The Z characteristic trips between 2.5 and 5 times the 40 A rated current, making it suitable for protecting semiconductor devices and control circuits that have low inrush but require fast short-circuit clearing.
Where can I buy 5SL4140-0RC and get current pricing?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
MPN
5SL4140-0RC