Siemens 5SY4320-7 Miniature Circuit Breaker 20 A 3-Pole C

The Siemens 5SY4320-7 is a high-quality miniature circuit breaker (MCB) designed for reliable protection of electrical installations. With a rated current of 20 A and a 3-pole configuration, it ensures safe operation in commercial and industrial applications. This MCB features a C tripping characteristic, making it suitable for circuits with moderate inrush currents, such as lighting and motor loads.

Advantages

Robust construction and compliance with IEC 60898-1 guarantee long-term performance and safety. The compact design allows for easy installation on DIN rails, saving space in distribution boards. With a high breaking capacity of 6 kA, it provides effective protection against short circuits and overloads.

Suitable for

• Lighting circuits
• Motor protection
• General electrical distribution
• Commercial and industrial buildings

Key specifications

• Rated current: 20 A
• Number of poles: 3
• Tripping characteristic: C
• Rated switching capacity: 6 kA at 230/400 V AC
• Rated voltage: 230/400 V AC
• Rated insulation voltage: 440 V
• Rated impulse withstand voltage: 4 kV
• Frequency: 50/60 Hz
• Mounting type: DIN rail (EN 60715)
• Degree of protection: IP20 (terminals), IP40 (with enclosure)
• Ambient operating temperature: -25 to +45 °C
• Mechanical service life: 10,000 switching cycles
• Electrical service life: 10,000 switching cycles
• Standard compliance: IEC 60898-1
• Terminal type: Screw terminals
• Terminal capacity (solid wire): 0.75 - 35 mm²
• Terminal capacity (stranded wire): 0.75 - 25 mm²
• Power loss: approx. 5.1 W at rated current

Recommendations

For optimal performance, ensure proper installation by a qualified electrician. Use appropriate wire sizes and torque settings as per manufacturer guidelines.