Siemens 5SY41028 MCB 1-Pole C 2A 230/400V 6kA

Electricians and panel builders often need a reliable miniature circuit breaker for protecting control circuits and lighting loads in residential and commercial installations. The Siemens 5SY41028 is a 1-pole MCB with a rated current of 2 A and tripping characteristic C, making it suitable for circuits with moderate inrush currents. It is designed for DIN rail mounting and provides a rated switching capacity of 6 kA.

Key specifications

• Number of poles: 1
• Rated current: 2 A
• Tripping characteristic: C
• Rated voltage: 230/400 V AC
• Rated switching capacity: 6 kA
• Frequency: 50/60 Hz
• Mounting: DIN rail (EN 60715)
• Terminal type: screw terminals
• Terminal cross-section solid: 0.75–35 mm²
• Terminal cross-section stranded: 0.75–25 mm²
• Degree of protection: IP20 (terminals)
• Operating temperature: -25 to +45 °C
• Storage temperature: -40 to +75 °C
• Electrical endurance: 10,000 switching cycles
• Mechanical endurance: 10,000 switching cycles
• Standards: IEC/EN 60898-1

Why choose it

The 5SY41028 combines compact design with proven Siemens quality. Its C characteristic ensures reliable protection against overload and short-circuit while allowing normal inrush currents. The screw terminals accept a wide range of conductor sizes, and the device is built for long-term durability with high electrical and mechanical endurance.

Ideal use cases

• Protection of control circuits in industrial panels
• Residential and commercial lighting circuits
• Socket outlet circuits with moderate inrush loads
• Distribution boards requiring DIN rail mountable MCBs

Good to know

The device complies with IEC/EN 60898-1 and is suitable for use in ambient temperatures from -25 °C to +45 °C. It is intended for installation in distribution boards with IP20 protection at the terminals.