The 1-pole width (roughly 18 mm per pole) fits a single module slot. For a 3 A rail feeder, watch the load side — the B-curve may coordinate with downstream 6 A or 10 A MCBs if the fault current path is short; verify selectivity curves if feeding sub-circuits.
Siemens 5SY4103-6CC11 MCB, 230/400V 10kA 1-pole B 3A Railway
MPN5SY4103-6CC11
Siemens 5SY4103-6CC11 miniature circuit breaker, 230/400 V, 10 kA breaking capacity, 1-pole, B characteristic, 3 A rated current, for railway applications.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Product details
Frequently asked questions
Where can I buy the 5SY4103-6CC11 and get a price?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.
What does the 5SY4103-6CC11's B-curve and 10 kA rating mean for my application?
The B-curve trips at 3–5 times the rated current (9–15 A for this 3 A breaker), so it is suited for resistive loads or low-inrush circuits like lighting or control transformers. The 10 kA breaking capacity at 230/400 V means it can safely interrupt fault currents up to 10,000 A without welding contacts or cascading failure upstream.
What compliance documentation does Siemens provide for the 5SY4103-6CC11?
Siemens typically provides CE declaration of conformity for the Low Voltage Directive and RoHS compliance for this series. Specific certifications (UL, CSA, EAC) depend on the variant marking; verify the nameplate or request the manufacturer's declaration for your jurisdiction.
MPN
5SY4103-6CC11