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Siemens 5SY4104-5 1-Pole Miniature Circuit Breaker — 4A

Siemens 1-pole Miniature Circuit Breaker, 4A, A-curve.

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ManufacturerSiemens

Part number5SY4104-5

Voltage 230/400 V

Breaking Capacity 10 kA

Poles 1

Curve Type A

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1-pole protection 10kA breaking capacity A-curve characteristic Fast tripping for sensitive loads Compact 70mm depth Siemens reliability

Product description

The Siemens 5SY4104-5 is a high-quality miniature circuit breaker designed for specialized protection needs. This 1-pole device features a 10kA breaking capacity at 230/400V and is equipped with an A-curve characteristic for rapid response to overcurrents. It has a rated current of 4A and a standard 70mm installation depth.

This A-curve breaker is specifically designed for circuits that require very sensitive protection against overloads and short circuits, such as those found in sensitive electronic equipment, instrumentation, or control systems where minimal inrush current is expected. It's critical for safeguarding delicate components in advanced industrial settings.

Stanlo Automation, a veteran-owned business specializing in surplus industrial parts, offers the Siemens 5SY4104-5. We ensure that our customers receive dependable components, backed by our commitment to quality and service, to maintain the efficiency of their operations.

Technical specifications

Voltage	230/400 V
Breaking Capacity	10 kA
Poles	1
Curve Type	A
Current Rating	4 A
Depth	70 mm
Manufacturer	Siemens

Common applications

Sensitive electronic circuits

Instrumentation

Control panels

Test equipment

Semiconductor protection

Low inrush applications

Compatible systems

Advanced electronics Scientific instrumentation Precision control systems

Also known as

Siemens 5SY41045 Siemens 4A mini breaker Siemens electronic breaker

Replaces / compatible with

Ideal for replacing older Siemens miniature circuit breakers or other brands that offer equivalent 1-pole, 4A A-curve protection.

Technical note

Expert tip

The A-curve of the 5SY4104-5 provides protection against overcurrents from 1 to 1.13 times the rated current, making it the most sensitive curve for safeguarding very delicate electronic circuits.

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Frequently asked questions

Why would I choose an A-curve breaker like the Siemens 5SY4104-5 for my application?

You would choose the Siemens 5SY4104-5 with an A-curve for applications where the protection of highly sensitive electronic components is paramount. This curve offers the quickest tripping response, protecting against even small overcurrents that could damage delicate circuitry, and is suitable for systems with minimal or no inrush current.