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Siemens 5SY4203-6CC — 2-Pole MCB (DIN Rail)

Siemens SENTRON 5SY4203-6CC MCB, 2P, B-Curve, 3 A, 400 V, 10

MPN5SY4203-6CC

Siemens SENTRON 5SY4203-6CC, miniature circuit breaker, 2-pole, B-curve, 3 A rated current at 400 V AC, 10 kA breaking capacity (EN 60898), 5 kA (UL 1077), IP20 with conductors, 36 x 90 x 76 mm.

Siemens 5SY4203-6CC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4203-6CC — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY4203-6CC — Electrical
ParameterValue
Number of poles2
5SY4203-6CC — Protection
ParameterValue
Tripping characteristic classB
Overvoltage categoryIII
5SY4203-6CC — Mechanical
ParameterValue
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors
5SY4203-6CC — Environmental
ParameterValue
Pollution degree3

Product details

The Siemens SENTRON 5SY4203-6CC is a 2-pole miniature circuit breaker with a B-curve trip characteristic, rated at 3 A and 400 V AC. Its 10 kA breaking capacity per EN 60898 covers most commercial and light industrial fault levels; the UL 1077 listing at 5 kA extends its use into North American panel builds. The 2-pole version switches both phase conductors, with no neutral switching built in. Operating temperature range spans -40 °C to 75 °C, with humidity derating above 55 °C. Vibration resistance per IEC 60068-2-6 covers ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz — suitable for machine-mounted enclosures.

Integration Notes

The sealable design supports anti-tamper requirements in metered or shared-access panels.

Frequently asked questions

How do I get current pricing and availability for 5SY4203-6CC?

Submit an RFQ through this listing. Pricing and stock are confirmed at quote time — the 3 A B-curve 2-pole variant is a less common line item, so availability is verified per request rather than published as a static figure.

What is the closest functional alternative to 5SY4203-6CC — for example, 5SY3132-6?

The 5SY3132-6 is a 1-pole B-curve 32 A breaker — different pole count and rating entirely. For a 2-pole 3 A B-curve, the 5SY4203-6CC is the correct order code within the SENTRON 5SY4 series. No direct drop-in second source exists; the 5SY4 family shares the same 36 mm per-pole width and DIN-rail mount, so a 2-pole unit from the same series is the only form-fit-functional match.

What compliance documentation does Siemens provide for 5SY4203-6CC?

The breaker carries EN 60898 (10 kA) and UL 1077 / CSA C22.2 No.235 (5 kA) certifications. It is halogen-free and silicon-free. Standard Siemens documentation includes CE declaration of conformity and, on request, the UL/CSA file number for panel acceptance.

Will 5SY4203-6CC drop into a panel specified around 5SY3132-6 without rewiring?

No — the 5SY3132-6 is a 1-pole breaker, while the 5SY4203-6CC is 2-pole. The DIN-rail footprint and per-pole width (36 mm) are the same, but the 2-pole unit occupies 2 width units instead of 1, and the wiring scheme differs (switched phase vs. both phases). Panel layout and busbar arrangement would need adjustment.

MPN
5SY4203-6CC