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Siemens 5SY4203-8CC — 2-Pole MCB (DIN Rail)

Siemens 5SY4203-8CC SENTRON MCB, 2P D 3A, 10kA

MPN5SY4203-8CC

Siemens SENTRON 5SY4203-8CC miniature circuit breaker, 2-pole, D tripping characteristic, 3 A rated current, 400 V AC, 10 kA breaking capacity per EN 60898, 2 modular width units.

Siemens 5SY4203-8CC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4203-8CC — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY4203-8CC — Electrical
ParameterValue
Number of poles2
5SY4203-8CC — Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY4203-8CC — 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
5SY4203-8CC — Environmental
ParameterValue
Pollution degree3
5SY4203-8CC — Specifications
ParameterValue
At AC rated value400 V
According to EN 60898 rated value10 kA
With single-phase operation at AC rated value440 V

Product details

D-curve 3 A MCB for inductive and motor loads

The D-curve trips between 10× and 20× rated current, so it avoids nuisance trips on inductive startup surges while still protecting the branch circuit. Rated 400 V AC with a 10 kA breaking capacity per EN 60898, it can safely interrupt fault currents up to that level in a 50/60 Hz system. The 2-pole design (2P) switches both phase and neutral — no neutral conductor switching on this variant.

Integration and mounting notes

Snap-on DIN rail mount, any orientation. Halogen-free and silicon-free construction meets low-smoke, low-corrosion requirements for clean-room or marine environments.

Frequently asked questions

What is the breaking capacity of 5SY4203-8CC?

10 kA per EN 60898 at 400 V AC, and 5 kA per UL 1077 / CSA C22.2 No. 235.

Where can I buy 5SY4203-8CC?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time. No stock figures or lead-time numbers are listed here.

Will 5SY4203-8CC drop into a panel specified for 5SY4116-6CC?

Both are 2-module-width SENTRON MCBs on the same DIN-rail footprint, so mechanical fit is identical. Verify the rating: 5SY4203-8CC is 3 A D-curve, while 5SY4116-6CC is a different rating and curve — confirm the branch circuit protection requirements before substituting.

MPN
5SY4203-8CC