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Siemens 5SY6 1+N-Pole Miniature Circuit Breaker, 40A, C Curve

Siemens 5SY6 miniature circuit breaker, 1+N-pole, 40A, Type C.

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ManufacturerSiemens

Part number5SY6540-7

Voltage 230V

Current 40A

Poles 1+N

Breaking Capacity 6kA

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1+N-pole configuration 6kA breaking capacity Type C tripping curve for high inrush loads Compact 70mm width High amperage rating

Product description

The Siemens 5SY6540-7 is a high-current miniature circuit breaker designed for robust protection in demanding electrical systems. This 1+N-pole device operates at 230V with a 6kA breaking capacity and features a Type C tripping characteristic, suitable for high inrush current applications. It is rated for 40A and fits standard 70mm DIN rail widths.

This breaker is designed for heavy-duty industrial and commercial applications, such as protecting main distribution circuits, large motor loads, and power distribution units where high currents are managed. The Type C curve ensures reliable operation by allowing for startup surges without triggering a fault.

Stanlo Automation, a veteran-owned specialist in surplus industrial automation parts, offers the Siemens 5SY6540-7. Secure this essential component to ensure the safety and reliability of your high-power systems.

Technical specifications

Voltage	230V
Current	40A
Poles	1+N
Breaking Capacity	6kA
Tripping Characteristic	C
Width	70mm

Common applications

Industrial Main Feeders

Large Motor Protection

Power Distribution Panels

Heavy Commercial Loads

Manufacturing Equipment

Compatible systems

Standard DIN rail mounting systems Siemens fuse and adapter systems

Also known as

Siemens 5SY6 MCB 5SY6340-7 40A 1+N Pole C Curve Breaker

Replaces / compatible with

This circuit breaker is designed to replace or complement existing 1+N pole circuit breakers with a Type C curve and 40A rating. It is compatible with standard Siemens DIN rail mounting accessories.

Technical note

Expert tip

For installations with potentially higher fault currents than 6kA, consider circuit breakers with a higher breaking capacity or appropriate upstream protective devices.

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Frequently asked questions

What is the breaking capacity of the Siemens 5SY6540-7?

The Siemens 5SY6540-7 has a breaking capacity of 6kA. This means it can safely interrupt a fault current up to 6,000 amperes at its rated voltage, providing essential protection against severe short circuits.