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Siemens 5SY4304-8CC11 — 3-Pole MCB (DIN Rail)

Siemens 5SY4304-8CC11 SENTRON MCB, 3P D 4A 10kA 400V

MPN5SY4304-8CC11

Siemens SENTRON 5SY4304-8CC11, miniature circuit breaker, 3-pole, D tripping characteristic, 4 A rated current, 10 kA breaking capacity at 400 V AC, for railway applications.

Siemens 5SY4304-8CC11 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4304-8CC11 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY4304-8CC11 — Protection
ParameterValue
Tripping characteristic (curve)D
Breaking capacity per EN 6089810 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Pollution degree3
5SY4304-8CC11 — Electrical
ParameterValue
Rated voltage (AC, multi-phase)440 V
Voltage type (AC/DC)AC
Supply frequency range50/60 Hz
Power loss per pole at rated current (AC, hot)1.2 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY4304-8CC11 — Mechanical
ParameterValue
Modular width units3
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Terminal tightening torque, max.75 °C
Terminal tightening torque, min.-40 °C
Combined terminal, topYes
Combined terminal, bottomYes
Fastening methodQuick assembly system
SealableYes
Accepts supplementary devicesYes
5SY4304-8CC11 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
Vibration resistance (IEC 60068-2-6)±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz

Product details

The breaker is sealable — you can lock the toggle in the OFF position for lockout/tagout compliance.

Electrical ratings and selectivity

Rated operational voltage is 400 V AC (440 V max for both single-phase and multi-phase operation). Frequency range 50/60 Hz. DC rating tops out at 72 V — this is primarily an AC breaker; don't spec it for a 110 V DC control bus. The D-curve's magnetic trip threshold (10–20× In) means it won't trip on motor or transformer inrush, but coordination with upstream fuses or an MCCB should still be verified per IEC 60947-2.

Frequently asked questions

What is the breaking capacity of the 5SY4304-8CC11?

10 kA at 400 V AC, rated per EN 60898. That's the standard branch-circuit fault level for most industrial and railway distribution boards.

Will the 5SY4304-8CC11 drop into a panel built for the 5SY4304-7CV?

Both are 3-pole SENTRON MCBs with the same 54 mm width (3 MW) and DIN-rail mounting, so the mechanical fit is identical. The 8CC11 carries a D-curve and 4 A rating; the 7CV variant uses a different characteristic and current — verify the tripping curve and ampacity match your branch circuit before swapping.

Where can I buy the 5SY4304-8CC11?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
5SY4304-8CC11