Siemens SENTRON 5SY4 MCB 20A 1-Pole C 6kA Miniature Circuit Breaker

The Siemens SENTRON 5SY4 series miniature circuit breaker (MCB) is a high-performance protective device designed for reliable overcurrent and short-circuit protection in electrical installations. With a rated current of 20 A and a tripping characteristic of C, this 1-pole breaker ensures safe operation for a wide range of applications. Compliant with IEC/EN 60898, it offers a rated switching capacity of 6 kA, making it suitable for residential, commercial, and industrial environments.

Advantages

This MCB provides thermal-magnetic protection, combining a bimetallic strip for overload protection and an electromagnetic coil for short-circuit protection. Its compact design allows for easy installation on DIN rails, saving space in distribution boards. The screw terminals accommodate conductors from 0.75 to 35 mm², ensuring secure connections. With a mechanical and electrical service life of 10,000 switching cycles, it guarantees long-term reliability.

Suitable for

• Overcurrent and short-circuit protection in lighting circuits
• Protection of socket outlets and small appliances
• Control and auxiliary circuits in industrial panels
• Residential and commercial distribution boards

Key specifications

• Rated Current: 20 A
• Number of Poles: 1
• Tripping Characteristic: C
• Rated Switching Capacity (Icn): 6 kA
• Rated Voltage (AC): 230/400 V
• Frequency: 50/60 Hz
• Mounting Type: DIN rail
• Degree of Protection: IP20
• Terminal Type: Screw terminals
• Terminal Capacity: 0.75 - 35 mm²
• Mechanical Service Life: 10,000 switching cycles
• Electrical Service Life: 10,000 switching cycles
• Ambient Operating Temperature: -25 to +45 °C
• Standard Compliance: IEC/EN 60898
• Energy Limiting Class: 3
• Overvoltage Category: III
• Product Series: SENTRON 5SY4
• Type of Release: Thermal-magnetic

Recommendations

For optimal performance, ensure that the MCB is installed by a qualified electrician and that the system's prospective short-circuit current does not exceed 6 kA. Regular testing of the breaker's functionality is recommended to maintain safety standards.