SIEMENS SENTRON 5SY4 Interruttore automatico magnetotermico (MCB) 3 poli B 20A 5SY4320-6

The SIEMENS SENTRON 5SY4 5SY4320-6 is a high-quality 3-pole miniature circuit breaker (MCB) with B tripping characteristic and a rated current of 20 A. Designed for reliable overcurrent protection in residential, commercial, and industrial installations, this MCB ensures safe operation and equipment protection. Manufactured by Siemens, a global leader in electrical engineering, the 5SY4320-6 meets international standards and offers robust performance.

Advantages

This MCB provides reliable protection against overloads and short circuits, with a B characteristic suitable for resistive and light inductive loads. Its compact design saves space on DIN rails, and the screw terminals ensure secure and easy wiring. With high switching capacity and long electrical endurance, it guarantees long-lasting performance.

Suitable for

• Overcurrent protection in distribution boards
• Lighting circuits, socket outlets, and small appliances
• Commercial and industrial control panels
• Residential electrical installations

Key specifications

• Product Type: Miniature Circuit Breaker (MCB)
• Series: SENTRON 5SY4
• Number of Poles: 3-pole
• Tripping Characteristic: B
• Rated Current: 20 A
• Rated Voltage (AC): 400 V
• Rated Switching Capacity (IEC 60898-1): 6 kA
• Rated Frequency: 50/60 Hz
• Installation Type: DIN rail (EN 60715)
• Degree of Protection: IP20 (terminals), IP40 (with cover)
• Ambient Temperature (Operation): -25 to +45 °C
• Ambient Temperature (Storage): -40 to +75 °C
• Electrical Endurance: 10,000 switching cycles
• Mechanical Endurance: 20,000 switching cycles
• Connection Type: Screw terminals
• Conductor Cross-section (Solid): 0.75 ... 35 mm²
• Conductor Cross-section (Stranded): 0.75 ... 25 mm²
• Tightening Torque: 2.5 ... 3 Nm
• Mounting Depth: 70 mm

Recommendations

For optimal protection, always select the correct rated current and tripping characteristic according to the load type. Ensure proper installation by a qualified electrician and comply with local regulations.