The Siemens SENTRON 5SY5101-7CC11 is a 1-pole miniature circuit breaker rated 1 A with a C-curve tripping characteristic, designed for universal current operation on DC circuits up to 220 V (250 V max) and AC circuits at 230/400 V. Its 10 kA breaking capacity at 220 V DC per IEC 60947-2 means it can safely interrupt a fault current up to that level on a DC rail without cascading upstream — critical for protecting downstream loads in a DC distribution panel.
Siemens 5SY5101-7CC11 SENTRON MCB, 1A C-curve, 10kA DC, rail
MPN5SY5101-7CC11
Siemens SENTRON 5SY5101-7CC11, miniature circuit breaker, 1-pole, C-curve, 1 A, 10 kA DC at 220 V, for railway applications.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Number of poles | 1 |
| Parameter | Value |
|---|---|
| Tripping characteristic class | C |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Width | 18 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| IP protection class | IP20, with connected conductors |
| Halogen-free | Yes |
| Silicone-free | Yes |
Product details
Frequently asked questions
Where can I buy 5SY5101-7CC11 and how do I get a price?
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 is the closest functional second-source to 5SY5101-7CC11?
The 5SY7140-8CC is a peer in the same SENTRON family but differs in key ratings: it is an AC-only 40 A D-curve breaker with 15 kA at 400 V AC and a lower DC max of 72 V. It will not drop into a panel specified for the 5SY5101-7CC11 without rewiring because the DC voltage rating and tripping curve are different — the 5SY7140-8CC is not a functional substitute for a 1 A DC railway circuit.
What is 5SY5101-7CC11's listed depth?
The overall depth is 76 mm, with an installation depth of 70 mm behind the panel face.
What wire sizes does 5SY5101-7CC11 accept?
The screw-type terminals accept 0.75 to 35 mm² solid or stranded copper conductors.
Will 5SY5101-7CC11 drop into a panel specified around 5SY7140-8CC without rewiring?
No. The 5SY7140-8CC is an AC-only 40 A D-curve breaker with a 72 V DC max, while the 5SY5101-7CC11 is a 1 A C-curve breaker rated for 220 V DC railway service. The footprint (18 mm width, DIN rail) is the same, but the electrical ratings and application are incompatible — rewiring and possibly a different busbar arrangement would be required.
MPN
5SY5101-7CC11