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Siemens 5SY4303-7 3-Pole Miniature Circuit Breaker — 3A

Siemens 5SY4303-7 3-pole miniature circuit breaker.

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ManufacturerSiemens

Part number5SY4303-7

Type Miniature Circuit Breaker

Manufacturer Siemens

Part Number 5SY4303-7

Poles 3

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3-pole protection 400V rated 10kA breaking capacity C-curve tripping 3A current rating 70mm depth

Product description

The Siemens 5SY4303-7 is a 3-pole miniature circuit breaker engineered for robust protection in three-phase electrical systems. It features a 400V rated voltage and a 10kA breaking capacity, incorporating a C-curve trip characteristic designed for loads with moderate inrush currents. This model is rated at 3A and has a standard 70mm installation depth.

This 3A, 3-pole circuit breaker with a C-curve is suitable for a variety of applications, including control circuits, small three-phase motors, lighting systems, and general power distribution where reliable protection against overloads and short circuits is necessary.

Stanlo Automation, a veteran-owned distributor of surplus industrial parts, offers the Siemens 5SY4303-7. We pride ourselves on providing quality components, competitive pricing, and efficient service to meet your industrial automation needs.

Technical specifications

Type	Miniature Circuit Breaker
Manufacturer	Siemens
Part Number	5SY4303-7
Poles	3
Rated Voltage	400V
Breaking Capacity	10kA
Current Rating	3A
Trip Curve	C
Depth	70 mm

Common applications

Control circuits

Small motor loads

Lighting control

Three-phase distribution

Automation panels

Commercial electrical systems

Compatible systems

Designed for integration into Siemens modular distribution boards and control panels.

Also known as

Siemens 5SY4303-7 MCB Siemens 3A 3-pole breaker 5SY43037

Replaces / compatible with

This Siemens 5SY4303-7 breaker is part of the 5SY4 series and can serve as a replacement for other 5SY4 3-pole breakers with similar ratings. It is compatible with Siemens switchgear accessories.

Technical note

Expert tip

Ensure the 5SY4303-7 is installed in an environment where the ambient temperature does not adversely affect its performance, per manufacturer guidelines.

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Frequently asked questions

What are the typical industrial uses for a Siemens 5SY4303-7 3A C-curve breaker?

The Siemens 5SY4303-7 is often used in industrial settings to protect three-phase control circuits, small motor applications, and lighting systems that experience moderate inrush currents. Its C-curve allows for reliable operation while safeguarding against overcurrents.