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Siemens SENTRON 5SY4340-7 3-Pole C Curve Miniature Circuit Breaker

Siemens 5SY4340-7 3-pole C-curve miniature circuit breaker.

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ManufacturerSiemens

Part number5SY4340-7

Voltage 400V AC

Current 40A

Poles 3

Tripping Characteristic C

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3-pole design Type C tripping curve 10kA breaking capacity DIN rail mountable Protects circuits with moderate inrush Industrial and commercial use

Product description

The Siemens 5SY4340-7 is a 3-pole miniature circuit breaker from the SENTRON 5SY4 series, featuring a Type C tripping characteristic. It operates at 400V with a 10kA breaking capacity. The Type C curve is ideal for circuits with moderate inrush currents, making it a versatile choice for various industrial and commercial applications.

This breaker is widely used for protecting circuits with inductive loads like motors, transformers, and lighting systems that experience higher starting currents. Its balanced tripping behavior ensures effective protection against overloads and short circuits without unnecessary tripping.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 5SY4340-7. We are committed to providing genuine, high-quality industrial automation components, ensuring you receive reliable parts for your maintenance and operational needs.

Technical specifications

Voltage	400V AC
Current	40A
Poles	3
Tripping Characteristic	C
Breaking Capacity	10kA
Series	5SY4
Mounting	DIN Rail

Common applications

Motor control

Industrial machinery

Heavy-duty lighting

Distribution boards

High-power commercial panels

Compatible systems

Standard DIN rail mounting systems

Also known as

Siemens 5SY43407 SENTRON 5SY4 C40 3P MCB 40A C

Replaces / compatible with

Compatible with Siemens SENTRON 5SY series accessories.

Technical note

Expert tip

This breaker is designed for DIN rail mounting and features a thermal-magnetic trip mechanism for reliable protection.

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Frequently asked questions

What is the breaking capacity of the Siemens 5SY4340-7?

The Siemens 5SY4340-7 has a breaking capacity of 10kA at 400V AC. This rating indicates its ability to safely interrupt fault currents, providing crucial protection against electrical hazards.