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Siemens 5SY4250-7KK11 — 2-Pole MCB (DIN Rail)

Siemens 5SY4250-7KK11 SENTRON MCB, 2P C-curve 50 A, 10/15 kA

MPN5SY4250-7KK11

Siemens SENTRON 5SY4250-7KK11, 2-pole miniature circuit breaker, C-curve, 50 A rated, 10 kA (EN 60898) / 15 kA (IEC 60947-2), designed for railway applications.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY4250-7KK11 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY4250-7KK11 — Electrical
ParameterValue
Number of poles2
5SY4250-7KK11 — Protection
ParameterValue
Tripping characteristic classC
Overvoltage categoryIII
5SY4250-7KK11 — Mechanical
ParameterValue
Modular width units2
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors
5SY4250-7KK11 — Environmental
ParameterValue
Pollution degree3
5SY4250-7KK11 — Specifications
ParameterValue
Energy Limitation Class3

Product details

That 15 kA IEC rating means it can handle higher prospective fault currents typical in industrial and traction power panels — useful when coordinating with upstream distribution gear.

The 50 A rating holds at 35 °C ambient. At 40 °C it derates to 47.6 A, at 50 °C to 45.1 A, and at 60 °C to 42.4 A.

Fastens via the quick-assembly system — snaps on and off without tools. The 76 mm overall depth includes the front projection. Touch protection is built in.

Frequently asked questions

Where can I buy 5SY4250-7KK11 and 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 breaking capacity of 5SY4250-7KK11?

10 kA per EN 60898 and 15 kA per IEC 60947-2. The higher IEC figure applies in industrial panels where the prospective fault current is greater than the domestic standard covers.

What compliance documentation does Siemens provide for 5SY4250-7KK11?

The breaker is designed for railway applications (per the product designation), halogen-free and silicon-free, with IP20 protection (with connected conductors). Standard Siemens SENTRON documentation includes the declaration of conformity and CE marking; specific RoHS/REACH/UL statements are available from the manufacturer upon request.

MPN
5SY4250-7KK11