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Siemens 5SY5250-6CC — 2-Pole MCB (DIN Rail)

Siemens 5SY5250-6CC SENTRON MCB, 2-pole DC, 50 A, B curve

MPN5SY5250-6CC

Siemens SENTRON miniature circuit breaker, 5SY5250-6CC, 2-pole DC, B characteristic, 50 A, 440 V DC, 10 kA interrupting capacity.

Siemens 5SY5250-6CC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5250-6CC — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY5250-6CC — Electrical
ParameterValue
Number of poles2
5SY5250-6CC — Protection
ParameterValue
Tripping characteristic classB
Overvoltage categoryIII
5SY5250-6CC — 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
5SY5250-6CC — Environmental
ParameterValue
Pollution degree3

Product details

DC-rated MCB for 50 A circuits

The Siemens SENTRON 5SY5250-6CC is a 2-pole DC miniature circuit breaker rated 50 A with a B tripping characteristic, built for 440 V DC systems and a 10 kA interrupting capacity per IEC 60947-2. The B curve (3-5 In) trips fast on moderate overloads, which suits resistive loads like heaters, lighting, or control power supplies where you don't want nuisance trips from inrush.

Panel fit and environmental tolerance

It's halogen-free and silicon-free, so outgassing won't foul sensitive contacts or optics in the same cabinet. The -40 °C to 75 °C operating range covers cold warehouse startups and hot summer days inside a non-climate-controlled panel.

Frequently asked questions

What is the 5SY5250-6CC used for?

It's a 2-pole DC miniature circuit breaker rated 50 A with a B characteristic, used to protect DC circuits up to 440 V from overloads and short circuits. Common applications include battery distribution, DC bus protection, and control power supplies where the B curve prevents nuisance tripping.

Will the 5SY5250-6CC drop into a panel specified for the 5SY5240-7?

Physically yes — same 76 mm depth, 36 mm width (2 MW), same DIN-rail quick-assembly mounting, same any-position orientation. The difference is the 5SY5240-7 is a C-curve 40 A AC/DC unit, while this is a B-curve 50 A DC-only breaker. Polarity must be observed on this DC part; the 5SY5240-7 accepts AC as required or DC with polarity observed. No rewiring of the busbar or mounting footprint needed.

Where can I buy the 5SY5250-6CC?

This part is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability.

MPN
5SY5250-6CC