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Siemens 5SY4432-8 — 4-Pole MCB (DIN Rail)

Siemens 5SY4432-8 SENTRON MCB, 4-Pole D Curve 32 A, 10 kA

MPN5SY4432-8
Active

Siemens SENTRON 5SY4432-8, 4-pole miniature circuit breaker, D tripping characteristic, 32 A rated current, 10 kA breaking capacity per EN 60898, 20 kA per IEC 60947-2, 4 modular width units (72 mm).

$344.94Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY4432-8 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY4432-8 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated voltage, AC (multi-phase)440 V
5SY4432-8 — Protection
ParameterValue
Tripping characteristic (trip curve)D
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
5SY4432-8 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Fastening / mounting methodQuick assembly system
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SY4432-8 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
5SY4432-8 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)2.1 W

Product details

The 5SY4432-8: At 400 VAC this handles most industrial distribution panel fault levels without cascading upstream. The dual standard also carries UL1077 recognition, so it qualifies as a supplementary protector in North American panels.

Panel fit and derating

Mounts in any position — no orientation restriction for the thermal-magnetic mechanism. Rated current derates with ambient temperature: 30.46 A at 40 °C, 28 A at 55 °C, 27.14 A at 60 °C.

Sourced to order against the BOM quantity. The sealable option allows the panel builder to lock the toggle position after commissioning, which some site safety procedures require.

Frequently asked questions

Is Siemens 5SY4432-8 UL1077 certified?

Yes, the 5SY4432-8 carries UL1077 recognition as a supplementary protector, per the dual standard listing IEC/EN 60898-1 and IEC/EN 60947-2 / UL1077. This allows its use in North American control panels where a branch-circuit rated breaker is not required.

MPN
5SY4432-8