Siemens 5SY5104-6 Miniature Circuit Breaker 4 A, 1-Pole, B Characteristic, 6 kA, 230/400 V AC

The Siemens 5SY5104-6 is a 1-pole miniature circuit breaker (MCB) with B tripping characteristic, rated at 4 A and 230/400 V AC. It provides reliable protection against overload and short-circuit in residential and commercial electrical installations.

Advantages

This MCB offers a 6 kA rated switching capacity, ensuring safe interruption of fault currents. Its compact design fits standard 35 mm DIN rails, and screw terminals accommodate conductors from 0.75 to 35 mm² (solid) or 0.75 to 25 mm² (stranded).

Suitable for

• Protection of lighting and socket circuits
• Control circuits with moderate inrush currents
• Distribution boards in residential and commercial buildings

Key specifications

• Number of poles: 1
• Tripping characteristic: B
• Rated current: 4 A
• Rated voltage: 230/400 V AC
• Rated switching capacity: 6 kA
• Frequency: 50/60 Hz
• Mounting: DIN rail 35 mm
• Terminal capacity: 0.75–35 mm² solid, 0.75–25 mm² stranded
• Degree of protection: IP20 (terminals), IP40 (with cover)
• Electrical endurance: 10,000 switching cycles
• Mechanical endurance: 20,000 switching cycles
• Operating temperature: -25 to +45 °C
• Pollution degree: 3
• Overvoltage category: III

Recommendations

Choose this MCB for reliable protection of circuits with low inrush currents. Ensure proper sizing of conductors and compliance with local installation regulations.