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Siemens 5SY7402-7 Miniature Circuit Breaker: 4-Pole, 2A, C-Curve

Siemens 5SY7402-7 4-Pole Miniature Circuit Breaker, 2A

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ManufacturerSiemens

Part number5SY7402-7

Voltage 400V

Breaking Capacity 15kA

Poles 4

Curve Type C

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4-pole protection 15kA breaking capacity Type C tripping characteristic 400V operational voltage 2A low current rating

Product description

The Siemens 5SY7402-7 is a 4-pole miniature circuit breaker offering comprehensive protection for circuits requiring four conductors. It is rated for 400V with a 15kA breaking capacity and features a Type C tripping characteristic, suitable for general inductive and capacitive loads. This model has a low current rating of 2A.

This 4-pole breaker is ideal for applications such as protecting three-phase circuits with a neutral conductor, or for single-phase applications requiring complete isolation of all conductors. It is commonly used in control systems, distribution boards, and specialized equipment.

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Technical specifications

Voltage	400V
Breaking Capacity	15kA
Poles	4
Curve Type	C
Current Rating	2A
Width	70mm

Common applications

Three-phase with neutral circuits

Control systems

Distribution boards

Sensitive electronic equipment

Industrial control panels

Compatible systems

Standard DIN rail mounting systems

Also known as

Siemens 5SY7402-7 MCB Siemens 2A 4-pole breaker 5SY7 series breaker

Replaces / compatible with

This 4-pole Type C circuit breaker can replace other Siemens 4-pole miniature circuit breakers with similar specifications. Consult Siemens documentation for precise compatibility.

Technical note

Expert tip

When used in 3-phase + neutral applications, ensure the neutral conductor is also properly protected by this 4-pole breaker.

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Frequently asked questions

What is the primary use case for a 4-pole miniature circuit breaker like the Siemens 5SY7402-7?

A 4-pole miniature circuit breaker like the Siemens 5SY7402-7 is typically used to protect three-phase circuits that include a neutral conductor. It provides simultaneous isolation of all four conductors (three phases and neutral) for safety during maintenance or in the event of a fault. It can also be used for specific single-phase applications requiring full isolation.