SIEMENS SENTRON 5SY4 Miniature Circuit Breaker 5SY4350-7 C50A 3-Pole 10kA

The SIEMENS SENTRON 5SY4 miniature circuit breaker (MCB) is a high-performance protective device designed for industrial and commercial electrical installations. With a rated current of 50 A and a C-trip characteristic, it provides reliable overcurrent and short-circuit protection for circuits with moderate inrush currents, such as motor loads and lighting systems. The 3-pole configuration ensures simultaneous disconnection of all phases, enhancing safety during maintenance and fault conditions.

Advantages

This MCB offers a high short-circuit breaking capacity of 10 kA according to EN 60898-1, ensuring robust protection even in demanding environments. Its compact design saves space on DIN rails, and the screw terminals accommodate a wide range of conductor sizes for flexible installation. The device is built for long service life with 10,000 mechanical and electrical switching cycles, reducing maintenance costs.

Suitable for

• Industrial control panels and distribution boards
• Commercial building electrical systems
• Motor protection circuits with C-characteristic
• Lighting and general power distribution

Key specifications

• Product Type: Miniature Circuit Breaker (MCB)
• Series: SENTRON 5SY4
• Number of Poles: 3-Pole
• Tripping Characteristic: C-Characteristic
• Rated Current: 50 A
• Rated Voltage (AC): 230/400 V
• Short-circuit Breaking Capacity (EN 60898): 10 kA
• Frequency: 50/60 Hz
• Mounting Type: DIN Rail (EN 60715)
• Terminal Type: Screw Terminals
• Terminal Capacity (Solid Wire): 0.75 - 35 mm²
• Terminal Capacity (Stranded Wire): 0.75 - 25 mm²
• Degree of Protection (Terminals): IP20
• Degree of Protection (with cover): IP40
• Operating Temperature: -25 to +45 °C
• Storage Temperature: -40 to +75 °C
• Mechanical Service Life: 10,000 switching cycles
• Electrical Service Life: 10,000 switching cycles
• Standard: EN 60898-1

Recommendations

For optimal performance, ensure proper sizing of conductors and compliance with local electrical codes. This MCB is ideal for use in Siemens SENTRON distribution systems and compatible with standard DIN rail enclosures.