Siemens SENTRON 5SY41025 MCB, 1-Pole, C Curve, 2 A, 230/400 V AC, 6 kA, 1 Module

With a rated switching capacity of 6 kA, the Siemens SENTRON 5SY41025 miniature circuit breaker provides robust short-circuit protection for residential and commercial electrical installations. This 1-pole MCB with C tripping characteristic is rated for 2 A and operates at 230/400 V AC, making it suitable for a wide range of circuits.

Overview

The Siemens SENTRON 5SY41025 is a compact, DIN rail-mountable miniature circuit breaker (MCB) designed to protect electrical circuits from overload and short-circuit currents. Its C characteristic ensures reliable tripping for moderate inrush currents, typical of lighting and socket circuits. With a width of just 1 module (18 mm), it optimizes space in distribution boards.

What stands out

• High breaking capacity of 6 kA for enhanced safety
• Wide operating temperature range from -25°C to +45°C
• Long mechanical and electrical service life of 10,000 switching cycles
• Accepts conductor cross-sections up to 35 mm² (solid/stranded)
• Pollution degree 3 and overvoltage category III for demanding environments

Technical details

• Product type: Miniature circuit breaker (MCB)
• Series: SENTRON
• Number of poles: 1
• Tripping characteristic: C
• Rated current: 2 A
• Rated voltage: 230/400 V AC
• Rated switching capacity (Icn): 6 kA
• Frequency: 50/60 Hz
• Installation width: 1 module (18 mm)
• Mounting type: DIN rail (TH 35 mm)
• Terminal type: Screw terminal
• Conductor cross-section (solid/stranded): 0.75 - 35 mm²
• Conductor cross-section (fine-stranded with end sleeve): 0.75 - 25 mm²
• Protection class (terminals): IP20
• Protection class (with enclosure): IP40
• Mechanical service life: 10,000 switching cycles
• Electrical service life: 10,000 switching cycles
• Ambient operating temperature: -25 to +45 °C
• Pollution degree: 3
• Overvoltage category: III

Our verdict

The Siemens SENTRON 5SY41025 is a reliable and compact MCB that combines high breaking capacity with a wide temperature range, making it a solid choice for protecting circuits in residential and light commercial settings.