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Siemens 5SY4105-7 1-Pole Miniature Circuit Breaker — 0.5A

Siemens 1-pole Miniature Circuit Breaker, 0.5A, C-curve.

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ManufacturerSiemens

Part number5SY4105-7

Voltage 230/400 V

Breaking Capacity 10 kA

Poles 1

Curve Type C

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1-pole protection 10kA breaking capacity C-curve characteristic Low current rating Compact 70mm depth Siemens quality

Product description

The Siemens 5SY4105-7 is a precision 1-pole miniature circuit breaker designed for sensitive protection applications. It features a 10kA breaking capacity at 230/400V and a C-curve characteristic, providing a balance between sensitivity and inrush tolerance. This model is rated at 0.5A with a standard 70mm installation depth.

This C-curve breaker at a low 0.5A rating is ideal for protecting circuits with moderate inrush currents or for general-purpose protection in sensitive control systems. It's frequently used in building automation, control panels for specialized equipment, and lighting circuits where precise yet forgiving protection is needed.

Stanlo Automation, a veteran-owned supplier of industrial surplus parts, offers the Siemens 5SY4105-7. We are dedicated to providing reliable, high-quality components to ensure your automation systems operate efficiently and cost-effectively.

Technical specifications

Voltage	230/400 V
Breaking Capacity	10 kA
Poles	1
Curve Type	C
Current Rating	0.5 A
Depth	70 mm
Manufacturer	Siemens

Common applications

Control panels

Building automation

Lighting circuits

Low-power devices

Sensitive control systems

General purpose protection

Compatible systems

Low voltage control circuits Automation equipment Specialty lighting

Also known as

Siemens 5SY41057 Siemens 0.5A MCB Siemens small current breaker

Replaces / compatible with

Can replace older Siemens miniature circuit breakers or other brands with equivalent 1-pole, 0.5A C-curve ratings and dimensions.

Technical note

Expert tip

The 0.5A rating and C-curve of the 5SY4105-7 make it suitable for protecting sensitive control voltage circuits or small loads where precise overload detection is needed without susceptibility to minor transient surges.

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Frequently asked questions

What is the advantage of the C-curve on the Siemens 5SY4105-7 for low current applications?

The C-curve on the Siemens 5SY4105-7 (0.5A) offers a good balance for low-current applications. It provides protection against overloads and short circuits while tolerating moderate inrush currents typical of some control systems or lighting loads, preventing unnecessary tripping.