Siemens SENTRON 5SY5 MCB 1-Pole C 4A 10kA 230/400V AC/DC 5SY5104-7

The Siemens 5SY5104-7 is a 1-pole miniature circuit breaker from the SENTRON 5SY5 series, offering all-current sensitivity for both AC and DC circuits. Its C tripping characteristic and 4 A rated current make it suitable for protecting control circuits, PLCs, and other sensitive loads where moderate inrush currents are expected. With a 10 kA breaking capacity and compliance with IEC 60898-1, it provides dependable protection in industrial and commercial installations.

Highlights

• 1-pole MCB with C characteristic and 4 A rated current
• All-current sensitive: suitable for 230/400 V AC and 220 V DC systems
• 10 kA rated switching capacity for reliable fault interruption
• DIN rail mounting (TH 35 mm) for quick installation
• Screw terminals accept solid conductors up to 35 mm² and stranded up to 25 mm²

In daily use

Install the 5SY5104-7 on a standard 35 mm DIN rail in distribution boards or control panels. Its compact 1-pole design saves space, while the screw terminals ensure secure wiring. The breaker trips magnetically on short circuits and thermally on overloads, with a C curve that tolerates moderate inrush currents from transformers or lighting loads. Operating temperature range is -25 °C to +45 °C, making it suitable for a variety of environments.

Full specifications

• Series: SENTRON 5SY5
• Number of poles: 1
• Tripping characteristic: C
• Rated current: 4 A
• Rated voltage: 230/400 V AC, 220 V DC
• Rated switching capacity: 10 kA
• Frequency: 50/60 Hz
• Mounting: DIN rail TH 35 mm
• Degree of protection: IP20 (terminals), IP40 (with enclosure)
• Operating temperature: -25 °C to +45 °C
• Storage temperature: -40 °C to +75 °C
• Mechanical service life: 10,000 switching cycles
• Electrical service life: 10,000 switching cycles
• Terminal type: screw terminals
• Terminal capacity (solid): 0.75–35 mm²
• Terminal capacity (stranded): 0.75–25 mm²
• Standard: IEC 60898-1

Final note

The Siemens 5SY5104-7 combines all-current sensitivity with a robust 10 kA breaking capacity, making it a dependable choice for protecting both AC and DC circuits in industrial control applications.