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Siemens 5SY4304-8 3-Pole Miniature Circuit Breaker - 4A, 400V

Siemens 5SY4304-8 Miniature Circuit Breaker

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ManufacturerSiemens

Part number5SY4304-8

Poles 3

Current Rating 4A

Voltage Rating 400V AC

Breaking Capacity 10kA

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Veteran-owned

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3-pole design 4A current rating Type D tripping curve 10kA breaking capacity DIN rail mountable UL 1077 rated

Product description

The Siemens 5SY4304-8 is a 3-pole miniature circuit breaker designed for reliable overcurrent protection. It operates at 400V AC with a current rating of 4A and a short circuit breaking capacity of 10kA. This breaker features a Type D tripping characteristic, making it suitable for applications with high inrush currents.

This circuit breaker is ideal for use in industrial control panels, power distribution systems, and machinery where robust protection is essential. Its applications span across manufacturing, automation, and electrical infrastructure projects, ensuring safety and operational continuity.

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Technical specifications

Poles	3
Current Rating	4A
Voltage Rating	400V AC
Breaking Capacity	10kA
Tripping Characteristic	D
Mounting	DIN Rail
IP Rating	IP20

Common applications

Industrial Control Panels

Power Distribution

Machinery Protection

Automation Systems

Electrical Infrastructure

Compatible systems

General industrial automation systems, control panels, and electrical distribution boards.

Also known as

Siemens SENTRON 5SY4304-8 5SY4 Series Circuit Breaker Siemens 4A 3P MCB

Replaces / compatible with

Compatible with Siemens SENTRON 5SY series accessories. Consult manufacturer documentation for specific replacement information.

Technical note

Expert tip

The 5SY4304-8 is a supplementary protector (UL 1077 rated) and should be used in conjunction with a primary branch circuit protective device for complete protection.

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Frequently asked questions

What tripping characteristic does the Siemens 5SY4304-8 miniature circuit breaker have?

The Siemens 5SY4304-8 features a Type D tripping characteristic. This type is designed to handle higher inrush currents, making it suitable for applications involving motors, transformers, and solenoid valves without nuisance tripping.