SIEMENS SENTRON 5SY45166 MCB 4P C16 400V 6kA

The SIEMENS SENTRON 5SY45166 is a miniature circuit breaker (MCB) with 4 poles, C tripping characteristic, and 16 A rated current. It provides reliable overload and short-circuit protection in AC electrical installations up to 400 V.

Advantages

High switching capacity of 6 kA according to EN 60898-1. Suitable for DIN rail mounting (TH 35 mm). Screw terminals accept solid conductors up to 35 mm² and stranded up to 25 mm². Wide operating temperature range from -25 to +45 °C.

Suitable for

• Distribution boards in residential and commercial buildings
• Protection of circuits with moderate inrush currents (C characteristic)
• Three-phase and single-phase AC systems

Key specifications

• Number of poles: 4P
• Tripping characteristic: C
• Rated current: 16 A
• Rated voltage: 400 V AC
• Rated insulation voltage: 440 V
• Rated switching capacity: 6 kA
• Rated frequency: 50/60 Hz
• Mounting type: DIN rail (TH 35 mm)
• Degree of protection: IP20 (terminals), IP40 (with enclosure)
• Operating temperature: -25 to +45 °C
• Storage temperature: -40 to +75 °C
• Electrical endurance: 10,000 switching cycles
• Mechanical endurance: 20,000 switching cycles
• Terminal type: screw terminals
• Terminal cross-section (solid): 0.75 ... 35 mm²
• Terminal cross-section (stranded): 0.75 ... 25 mm²
• Standard compliance: EN 60898-1, IEC 60898-1

Recommendations

Use this MCB for protecting circuits with moderate inrush currents, such as lighting and socket outlets. Ensure proper DIN rail installation and torque settings for reliable connection.