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Siemens SENTRON 5SY4320-7 3-Pole C Curve Miniature Circuit Breaker

Siemens 5SY4320-7 3-pole C-curve miniature circuit breaker.

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ManufacturerSiemens

Part number5SY4320-7

Voltage 400V AC

Current 20A

Poles 3

Tripping Characteristic C

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Veteran-owned

CAGE: 9NK75

3-pole design Type C tripping curve 10kA breaking capacity DIN rail mountable Protects against overloads and short circuits High-quality Siemens component

Product description

The Siemens 5SY4320-7 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, designed for reliable protection against overloads and short circuits. The C-curve makes it suitable for circuits with moderate inrush currents.

This circuit breaker is widely used in industrial applications, motor control circuits, and lighting systems where higher inrush currents are expected compared to purely resistive loads. Its precise tripping behavior ensures optimal protection for equipment and personnel.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 5SY4320-7. We pride ourselves on providing genuine, high-quality components backed by exceptional service, ensuring you find the right automation parts efficiently.

Technical specifications

Voltage	400V AC
Current	20A
Poles	3
Tripping Characteristic	C
Breaking Capacity	10kA
Series	5SY4
Mounting	DIN Rail

Common applications

Motor control circuits

Lighting systems

Industrial machinery

Commercial electrical panels

Distribution boards

Compatible systems

Standard DIN rail mounting systems

Also known as

Siemens 5SY43207 SENTRON 5SY4 C20 3P MCB 20A C

Replaces / compatible with

Compatible with Siemens SENTRON 5SY series accessories.

Technical note

Expert tip

The 5SY4 series breakers are designed for 400V AC operation and feature a thermal-magnetic trip mechanism.

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Frequently asked questions

What applications are best suited for the Siemens 5SY4320-7 with a C-curve?

The C-curve is ideal for circuits with moderate inrush currents, such as those powering fluorescent lighting, motors, solenoids, or small transformers. It provides protection without nuisance tripping under normal operating conditions.