Siemens 5SY45107 MCB 1+N Pole C 10A 10kA 230V DIN Rail Miniature Circuit Breaker

The Siemens 5SY45107 is a high-quality miniature circuit breaker (MCB) from the 5SY series, designed for reliable overcurrent protection in residential and commercial electrical installations. With a rated current of 10 A and a tripping characteristic of Type C, it provides optimal protection for circuits with moderate inrush currents, such as lighting and small motor loads. The 1+N pole configuration includes a switched neutral, ensuring safe isolation. This MCB is suitable for DIN rail mounting and complies with EN 60898-1, offering a high breaking capacity of 10 kA at 230/240 V AC.

Advantages

This Siemens MCB ensures reliable protection against overloads and short circuits, with a compact design that saves space in distribution boards. The Type C characteristic is ideal for applications with moderate surge currents, reducing nuisance tripping. The 1+N pole design provides both phase and neutral switching for enhanced safety. With a high breaking capacity of 10 kA, it is suitable for use in systems with high fault currents. The device is easy to install on standard DIN rails and features screw terminals for secure wiring.

Suitable for

• Residential and commercial electrical panels
• Lighting circuits
• Small motor protection
• General-purpose overcurrent protection

Key specifications

• Rated current: 10 A
• Tripping characteristic: Type C
• Number of poles: 1+N (1-pole + switched neutral)
• Rated voltage: 230/240 V AC
• Rated switching capacity (Icn): 10 kA (EN 60898-1)
• Frequency: 50/60 Hz
• Installation: DIN rail
• Degree of protection: IP20 (terminals), IP40 (with enclosure)
• Mechanical/electrical service life: 10,000 cycles
• Ambient temperature: -25 to +45 °C
• Terminal type: Screw terminals
• Conductor cross-section (solid): 0.75 ... 35 mm²
• Conductor cross-section (stranded): 0.75 ... 25 mm²
• Mounting position: Any
• Overvoltage category: III
• Pollution degree: 3
• Energy limiting class: 3

Recommendations

For optimal performance, ensure that the MCB is installed by a qualified electrician and that the system's short-circuit capacity does not exceed 10 kA. Use appropriate wire sizes as specified in the technical data. This device is not suitable for DC applications.