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Siemens
5SY4203-7
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Check similar products or call us on +44 20 4570 3439 for assistance
This part is currently sold out
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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 5SY4203-7 |
| Alternative Part Number | 5SY42037 |
| Manufacturer | Siemens |
| Product Type | Miniature Circuit Breaker |
| Rated Voltage | 400 V |
| Interrupt Rate | 10 kA |
| Dimensions | 90 x 36 x 76 mm |
| Number of Poles | 2-pole |
| Tripping Characteristic | Type C |
| Rated Current | 3 A |
| Installation Depth | 70 mm |
| Mounting | Quick assembly system |
| Mounting Position | Any |
| Environmental Conditions | Operable in diverse environmental conditions with temperature influence resistance |
| Mechanical Operating Cycles | Typically 20,000 |
| Insulation Voltage | Rated at 440 V for multi-phase operation with AC |
| Connectable Conductor | Solid/stranded: 0.75 - 35 mm², Finely stranded with core end processing: 0.75 - 25 mm² |
| Tightening Torque | 2.5 - 3.5 N·m (22 - 31 lbf·in) |
| Product Features | Halogen-free, silicon-free, and sealable |
| Compliance | Complies with IEC/EN 60898-1, IEC/EN 60947-2 / UL1077 standards |
| Vibration Resistance | In accordance with IEC 60068-2-6 |
| Ambient Operating Temperature | -40 °C to +70 °C |
| Ambient Storage Temperature | -40 °C to +75 °C |
| Pollution Degree | 3 |
| Overvoltage Category | 3 |
| Product Approvals | General Product Approval, EMC Declaration of Conformity, and various international certifications |
The Siemens 5SY4203-7 is a robust miniature circuit breaker designed to provide reliable overcurrent protection in a variety of applications. Engineered for performance, this 400 V, 2-pole circuit breaker is capable of interrupting short-circuit currents up to 10 kA, ensuring the safety and integrity of electrical systems. With a compact form factor measuring 90 x 36 x 76 mm and an installation depth of 70 mm, it is an ideal solution for space-constrained environments.
This circuit breaker features a C tripping characteristic, which allows it to handle transient current spikes without tripping unnecessarily, making it suitable for applications with moderate inrush currents such as small motors and lighting circuits. The 3 A current rating of this device makes it well-suited for protecting circuits with lower current demands.
The 5SY4203-7 is designed with user convenience in mind, featuring a quick assembly system for ease of installation and maintenance. It is also characterised by its versatility, being suitable for use in any mounting position. The device is halogen-free and silicon-free, minimising environmental impact and ensuring compliance with stringent industry standards.
With its combination of compact size, reliable protection, and ease of use, the Siemens 5SY4203-7 miniature circuit breaker is a dependable choice for electrical protection in industrial, commercial, and residential settings.
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Frequently Asked Questions
What type of circuit breaker is this?
This is a miniature circuit breaker designed for quick assembly with a C tripping characteristic, suitable for AC/DC applications.
What are the voltage specifications for this circuit breaker?
The circuit breaker is rated for a supply voltage of 400V for AC, with multi-phase operation also at a rated value of 400V.
What is the interrupt rate of this circuit breaker?
The interrupt rate, or breaking capacity, for AC according to EN 60898 is 10 kA, and for DC in accordance with IEC 60947-2, it is 15 kA.
Can this circuit breaker be mounted in any position?
Yes, the circuit breaker is designed to be mounted in any position, providing flexibility in installation.
What is the rated current for this circuit breaker?
The rated current for this circuit breaker is 3A.
What are the dimensions of this circuit breaker?
The dimensions are 90 mm in height, 36 mm in width, and 76 mm in depth, with a mounting depth of 70 mm.
What is the tripping characteristic of this circuit breaker?
It has a C tripping characteristic, which means it is designed to trip at a current rating of 5 to 10 times its rated current, making it suitable for higher inrush currents typically found in inductive and motor loads.
Is this circuit breaker suitable for both residential and commercial applications?
Yes, with its C tripping characteristic and a breaking capacity of 10 kA, it is suitable for a variety of applications in both residential and commercial settings.
What is the significance of the 'C' in the tripping characteristic?
The 'C' in the tripping characteristic indicates that the circuit breaker is designed to withstand sudden high inrush currents, such as those caused by motor starts or inductive loads, without tripping unnecessarily.
How does the quick assembly system benefit installation?
The quick assembly system allows for faster and more efficient installation, reducing downtime and simplifying maintenance procedures.
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