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Siemens 5SY7304-8 — 3-Pole MCB (DIN Rail)

Siemens 5SY7304-8 SENTRON MCB, D-curve, 3P, 15/40 kA

MPN5SY7304-8

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Siemens SENTRON 5SY7304-8, miniature circuit breaker, 3-pole, D tripping characteristic, 15 kA (EN 60898-1) / 40 kA (IEC 60947-2), 400 V AC, 3 modular width units, halogen-free, silicon-free.

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Siemens 5SY7304-8 datasheet (PDF)

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

Specifications

5SY7304-8 — Identification
Parameter	Value
Brand name	SENTRON
Number of poles	3
Pole configuration	3P
Suitability for operation	Mechanical engineering / industry

5SY7304-8 — Protection
Parameter	Value
Tripping characteristic (curve)	D
Breaking capacity per EN 60898	15 kA
Breaking capacity per IEC 60947-2	40 kA
Overvoltage category	III
IP protection class	IP20, with connected conductors
Pollution degree	3

5SY7304-8 — Electrical
Parameter	Value
Rated voltage (AC, multi-phase)	440 V
Voltage type (AC/DC)	AC
Supply frequency range	50/60 Hz
Power loss per pole at rated current (AC, hot)	1.2 W
Mechanical service life (operating cycles, typ.)	10 000
Neutral conductor switching	No
Rated voltage (AC, single-phase)	440 V

5SY7304-8 — Mechanical
Parameter	Value
Modular width units	3
Mounting position	any
Width	54 mm
Height	90 mm
Depth	76 mm
Installation depth	70 mm
Terminal tightening torque, max.	75 °C
Terminal tightening torque, min.	-40 °C
Combined terminal, top	Yes
Combined terminal, bottom	Yes
Fastening method	Quick assembly system
Sealable	Yes
Accepts supplementary devices	Yes

5SY7304-8 — Environmental
Parameter	Value
Halogen-free	Yes
Silicone-free	Yes
Influence of surrounding temperature	max. 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 5SY7304-8 is a Siemens SENTRON miniature circuit breaker, 3-pole, with a D tripping characteristic. It is rated 15 kA breaking capacity per EN 60898-1 and 40 kA per IEC 60947-2 at 400 V AC; the 40 kA figure is the one that governs SCCR in an industrial panel where the prospective fault current may exceed the domestic standard. For DC circuits, it breaks 15 kA at up to 72 V DC.

Compliance documentation covers IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077. The part is halogen-free and silicon-free.

Panel integration

Height is 90 mm. No neutral conductor switching — this is a 3-pole device for three-phase circuits only. The sealable design allows panel builders to lock settings after commissioning.