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Siemens 5SY4363-8 — 3-Pole MCB (DIN Rail)

Siemens 5SY4363-8 SENTRON MCB, 3-pole D-curve, 10kA/15kA

MPN5SY4363-8

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Siemens SENTRON 5SY4363-8, 3‑pole D‑curve miniature circuit breaker, 10 kA (EN 60898‑1) / 15 kA (IEC 60947‑2), halogen‑free, IP20.

$541.02Ref. price · indicative, final on quote

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

Specifications

5SY4363-8 — Identification
Parameter	Value
Brand name	SENTRON
Number of poles	3
Pole configuration	3P
Suitability for operation	Mechanical engineering / industry

5SY4363-8 — Protection
Parameter	Value
Tripping characteristic (curve)	D
Breaking capacity per EN 60898	10 kA
Breaking capacity per IEC 60947-2	15 kA
Overvoltage category	III
IP protection class	IP20, with connected conductors
Pollution degree	3

5SY4363-8 — 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)	5 W
Mechanical service life (operating cycles, typ.)	10 000
Neutral conductor switching	No
Rated voltage (AC, single-phase)	440 V

5SY4363-8 — 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

5SY4363-8 — 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 Siemens 5SY4363-8 is a 3-pole D-curve miniature circuit breaker in the SENTRON line, built for industrial panels and equipment. It carries a dual interrupting rating — 10 kA under EN 60898-1 and 15 kA under IEC 60947-2 — giving you headroom for high-fault installations. The D-curve handles the inrush of motor starters and lighting transformers without nuisance tripping. Rated for AC 400/440 V and DC 72 V, it covers both main feeder and control circuit isolation.

Terminal top and bottom accept combined conductors, and the neutral is fixed (no moving neutral contact).

Certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077; the UL break rating is 5 kA, while IEC 60947-2 gives 15 kA.