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Siemens 5SY4432-8 4-Pole Miniature Circuit Breaker - 32A

Siemens 5SY4432-8 4-pole Miniature Circuit Breaker, 32A.

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ManufacturerSiemens

Part number5SY4432-8

Voltage 400V AC

Current 32A

Poles 4

Breaking Capacity 10kA

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4-pole protection D-curve tripping characteristic 10kA breaking capacity DIN rail mountable High inrush current handling

Product description

The Siemens 5SY4432-8 is a 4-pole miniature circuit breaker (MCB) engineered for reliable protection in applications with high inrush currents. It features a 400V voltage rating, a 10kA breaking capacity, and a D-curve tripping characteristic, making it suitable for loads that require significant starting current.

This breaker is designed for industrial environments and specialized automation systems where complete four-pole isolation and protection against overloads and short circuits are essential. The D-curve ensures that the breaker will not trip unnecessarily during the energization of inductive loads.

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Technical specifications

Voltage	400V AC
Current	32A
Poles	4
Breaking Capacity	10kA
Tripping Characteristic	D
Mounting	DIN Rail
Protection Class	IP20

Common applications

Industrial Automation

Motor Control

High Inrush Loads

Four-Pole Applications

Specialized Equipment

Compatible systems

Siemens SENTRON 5SY Series

Also known as

Siemens 5SY4 MCB 5SY4432-8 CB Siemens 32A D-curve Breaker

Replaces / compatible with

Compatible with Siemens 5SY4 series accessories and related components.

Technical note

Expert tip

The 5SY4432-8's D-curve magnetic trip point is optimized for industrial loads, typically triggering between 10 to 20 times the rated current.

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Frequently asked questions

What are the advantages of the D-curve on the Siemens 5SY4432-8?

The D-curve characteristic on the Siemens 5SY4432-8 is designed to accommodate high inrush currents commonly found in motor starting or transformer energization. This prevents nuisance tripping while still providing robust protection against overloads and short circuits.