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Siemens 5SY4308-7 — 3-Pole MCB (DIN Rail)

Siemens SENTRON 5SY4308-7 MCB, 3P C-curve, 10 kA IEC 60898-1

MPN5SY4308-7

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Siemens SENTRON 5SY4308-7, 3-pole miniature circuit breaker, C-curve, 10 kA (IEC 60898-1) / 20 kA (IEC 60947-2) / 5 kA (UL 1077), 400 V AC, 60 V DC, 3 MW units wide.

$52.07Ref. price · indicative, final on quote

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Siemens 5SY4308-7 datasheet (PDF)

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

Specifications

5SY4308-7 — Identification
Parameter	Value
Brand name	SENTRON
Number of poles	3
Pole configuration	3P
Suitability for operation	Mechanical engineering / industry

5SY4308-7 — Protection
Parameter	Value
Tripping characteristic (curve)	C
Breaking capacity per EN 60898	10 kA
Breaking capacity per IEC 60947-2	20 kA
Overvoltage category	III
IP protection class	IP20, with connected conductors
Energy limitation class	3
Pollution degree	3

5SY4308-7 — 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)	0.9 W
Mechanical service life (operating cycles, typ.)	10 000
Neutral conductor switching	No
Rated voltage (AC, single-phase)	440 V

5SY4308-7 — 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

5SY4308-7 — 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

It carries a 10 kA breaking capacity per IEC 60898-1, 20 kA per IEC 60947-2, and 5 kA per UL 1077 — so the same unit covers both residential-style and industrial coordination requirements without swapping parts.

The quick-assembly fastening system and any-position mounting let a wireman drop it into a crowded gland plate without reworking the backplane layout.

The dual-standard rating is the main event here. Under IEC 60947-2 that jumps to 20 kA, which is what an industrial MCC or a machine builder's panel with high fault current needs. The UL 1077 supplementary-protector rating of 5 kA keeps it legal for North American OEM machinery. One part, three coordination envelopes.