Siemens SENTRON 5SY4101-6 Miniature Circuit Breaker 1 A, 1-Pole, B-Characteristic, 6 kA, 230/400 V AC

Protect your electrical circuits from overload and short-circuit damage with the Siemens SENTRON 5SY4101-6 miniature circuit breaker. This 1-pole MCB with B-characteristic trips quickly on high inrush currents, making it ideal for residential and commercial installations where reliable protection is essential.

Who is it for

Electricians, panel builders, and maintenance technicians who need a dependable DIN rail-mounted circuit breaker for single-phase circuits up to 1 A. It suits distribution boards, control panels, and machinery with moderate inrush loads.

Main features

• 1-pole design for single-phase protection
• B tripping characteristic for standard cable and lighting circuits
• Rated current 1 A, rated voltage 230/400 V AC
• Breaking capacity 6 kA according to IEC 60898-1
• Screw terminals accept solid wires 0.75–35 mm² and stranded 0.75–25 mm²
• DIN rail mounting for quick installation
• Mechanical and electrical service life of 10,000 switching cycles

Specifications

• Series: SENTRON
• Number of poles: 1
• Tripping characteristic: B
• Rated current: 1 A
• Rated voltage: 230/400 V AC
• Rated switching capacity: 6 kA
• Frequency: 50/60 Hz
• Mounting type: DIN rail
• Terminal type: Screw terminals
• Degree of protection: IP20 (terminals), IP40 (with enclosure)
• Operating temperature: -25 to +45 °C
• Storage temperature: -40 to +75 °C
• Standard compliance: IEC 60898-1

Tips

Ensure the circuit breaker's rated current matches the load to avoid nuisance tripping. For higher inrush currents, consider a C or D characteristic. Always install in a suitable enclosure to achieve IP40 protection.