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Siemens 5SY4406-8 — 4-Pole MCB (DIN Rail)

Siemens 5SY4406-8 SENTRON 4P MCB, 6A D-Curve 400V

Name: 5SY4406-8
Brand: Siemens
SKU: 5SY4406-8
Availability: LimitedAvailability
Author: Shenzhen Shu

MPN5SY4406-8

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Siemens SENTRON 5SY4406-8 miniature circuit breaker, 4-pole, 6 A, 400 V AC, D-tripping characteristic, breaking capacity 10 kA EN 60898 / 35 kA IEC 60947-2.

$338.66Ref. price · indicative, final on quote

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Siemens 5SY4406-8 datasheet (PDF)

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

Specifications

5SY4406-8 — Identification
Parameter	Value
Type / order code	5SY4
Brand name	SENTRON
Application suitability	Mechanical engineering / industry

5SY4406-8 — Ratings
Parameter	Value
Number of poles	4
Pole configuration	4P
Rated current (In), AC	400 V
Rated current (In), AC	6 A
Rated voltage, AC (multi-phase)	440 V
Rated voltage, AC (single-phase)	440 V
Rated voltage, DC (max.)	72 V
Voltage type	AC
Rated frequency	50/60 Hz

5SY4406-8 — Protection
Parameter	Value
Tripping characteristic (trip curve)	D
Rated breaking capacity (Icn), per EN 60898	10 kA
Rated breaking capacity, per IEC 60947-2	35 kA
Breaking capacity, AC (UL 1077 / CSA C22.2 No.235)	5 kA
Overvoltage category	III
Pollution degree	3
Degree of protection (IP)	IP20, with connected conductors
Neutral conductor switching	No
Touch protection	Yes

5SY4406-8 — Mechanical
Parameter	Value
Width in modular units	4
Width	72 mm
Height	90 mm
Depth	76 mm
Installation depth	70 mm
Mounting position	any
Combined terminal, top	Yes
Combined terminal, bottom	Yes
Tightening torque, max.	75 °C
Tightening torque, min.	-40 °C
Sealable	Yes

5SY4406-8 — Environmental
Parameter	Value
Halogen-free	Yes
Silicone-free	Yes
Influence of ambient temperature (derating)	max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C

5SY4406-8 — Performance
Parameter	Value
Mechanical service life (switching cycles, typ.)	10 000

Product details

The Siemens 5SY4406-8 is a 4-pole miniature circuit breaker from the SENTRON 5SY4 series, rated 6 A at 400 V AC with a D-curve tripping characteristic — designed for high inrush loads like motors and transformers. D-curve tripping characteristic suits high inrush loads like motors and transformers. Breaking capacities: 10 kA, 35 kA, 5 kA, and 15 kA at DC.

Width of 72 mm (4 width units), depth 76 mm, height 90 mm. Mounts via quick-assembly system on DIN rail; installation depth is 70 mm. Any mounting position works, so no de-rating for horizontal orientation. Touch protection IP20 with connected conductors keeps fingers away from live parts.

Halogen-free and silicon-free construction, sealable for tamper-evident applications. Suitable for mechanical engineering and general industrial environments per the manufacturer's specification.