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Siemens 5SY6440-7 4-Pole Miniature Circuit Breaker - 40A 400V

Siemens 5SY6440-7 4-Pole Miniature Circuit Breaker

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ManufacturerSiemens

Part number5SY6440-7

Poles 4

Voltage 400V AC

Current 40A

Breaking Capacity 6kA

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4-pole design C-trip characteristic 6kA breaking capacity 400V AC rated voltage DIN rail mountable Halogen-free

Product description

The Siemens 5SY6440-7 is a 4-pole miniature circuit breaker offering robust protection for electrical circuits. It features a C-trip characteristic, a rated current of 40A, and a 6kA breaking capacity at 400V AC. This breaker is designed to prevent damage from overloads and short circuits.

This 4-pole configuration is ideal for applications requiring complete isolation of all phases, such as in three-phase systems or where a neutral conductor needs to be switched alongside live conductors. It's widely used in industrial facilities, commercial buildings, and manufacturing plants.

Stanlo Automation, your trusted veteran-owned surplus parts distributor, offers the Siemens 5SY6440-7. We ensure that you receive high-quality components essential for your automation projects.

Technical specifications

Poles	4
Voltage	400V AC
Current	40A
Breaking Capacity	6kA
Trip Characteristic	C
Mounting	DIN Rail
Series	5SY6

Common applications

Three-phase power systems

Industrial control panels

Building distribution boards

Machinery protection

Automation systems

Compatible systems

Compatible with standard DIN rail systems and suitable for integration into various industrial and commercial electrical panels.

Also known as

Siemens SENTRON 5SY6 4P 40A Siemens MCB 5SY6440-7 4-pole circuit breaker 40A

Replaces / compatible with

This circuit breaker is suitable for replacing other Siemens 5SY6 series 4-pole circuit breakers with identical ratings. Always confirm electrical and physical compatibility.

Technical note

Expert tip

This 4-pole breaker offers enhanced safety by ensuring complete isolation of the circuit, including the neutral conductor when applicable, in three-phase or specific single-phase applications.

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Frequently asked questions

What is the breaking capacity of the Siemens 5SY6440-7?

The Siemens 5SY6440-7 miniature circuit breaker has a breaking capacity of 6kA according to EN 60898. This specification ensures it can safely interrupt fault currents up to this level, providing essential protection.