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

Siemens 5SY4432-8FA SENTRON MCB, 32 A D-curve 4-pole, 10 kA

MPN5SY4432-8FA

Siemens SENTRON 5SY4432-8FA, 4-pole miniature circuit breaker, 32 A rated current, D tripping characteristic, 10 kA breaking capacity at 400 V AC, 4 module widths (72 mm).

Siemens 5SY4432-8FA datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4432-8FA — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY4432-8FA — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC400 V
Rated current (In), AC32 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Rated voltage, DC (max.)72 V
Voltage typeAC
Rated frequency50/60 Hz
5SY4432-8FA — Protection
ParameterValue
Tripping characteristic (trip curve)D
Rated breaking capacity (Icn), per EN 6089810 kA
Overvoltage categoryIII
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SY4432-8FA — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
SealableYes
5SY4432-8FA — 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
5SY4432-8FA — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

32 A D-curve 4-pole MCB for industrial branch circuits

The Siemens 5SY4432-8FA is a SENTRON miniature circuit breaker rated 32 A with a D tripping characteristic, 4 poles, and a 10 kA breaking capacity at 400 V AC per EN 60898. Rated voltage is 400 V AC across poles, with a maximum DC rating of 72 V. The 4-pole configuration (4P) switches all phases and does not switch the neutral — confirmed by the neutral conductor switching function being set to No. This is typical for 3-phase industrial loads where the neutral is bonded at the panel.

DIN-rail footprint and wiring

The quick-assembly mounting system snaps onto the rail without tools. Accepts solid or stranded conductors from 0.75 to 35 mm² at the screw terminals, torqued to 3.5 N·m. Mounting position is any, which helps in tight enclosures.

Construction features

Sealable design allows locking the breaker in the ON or OFF position for lockout/tagout compliance. Touch protection is integrated on the terminals.

Frequently asked questions

What is the breaking capacity of 5SY4432-8FA?

10 kA at 400 V AC per EN 60898. That is the standard interrupting rating for this class of MCB in industrial branch circuits.

What wire sizes does 5SY4432-8FA accept?

Solid or stranded conductors from 0.75 mm² up to 35 mm² at the screw terminals, torqued to 3.5 N·m.

Where can I buy 5SY4432-8FA and how is it quoted?

Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or prices are published here.

What is the physical size of 5SY4432-8FA?

72 mm wide (4 module widths), 90 mm tall, 76 mm deep. Installation depth is 70 mm on the DIN rail.

MPN
5SY4432-8FA