SIEMENS 5SY4506-7 4-Pole 6A C-Curve Miniature Circuit Breaker 6kA

With a 6 kA breaking capacity at 400 V AC and a C tripping characteristic, the SIEMENS 5SY4506-7 handles high inrush currents from motors and lighting while protecting against overloads and short circuits. Its 4-pole design and 6 A rating suit three-phase circuits with neutral, and the DIN rail mount simplifies installation.

Overview

The 5SY4506-7 is a miniature circuit breaker (MCB) for industrial and commercial distribution boards. It operates at 230/400 V AC, 50/60 Hz, and features screw terminals accepting solid conductors up to 35 mm² and stranded up to 25 mm². The breaker is rated for pollution degree 3 and overvoltage category III.

What stands out

• 4-pole switching with C-curve for inductive loads
• 6 kA breaking capacity for reliable fault interruption
• DIN rail (35 mm) mounting for quick installation
• Wide operating temperature range from -25 to +45 °C
• Mechanical and electrical service life of 10,000 cycles

Technical details

• Number of poles: 4
• Tripping characteristic: C
• Rated current: 6 A
• Rated voltage: 230/400 V AC
• Frequency: 50/60 Hz
• Breaking capacity: 6 kA at 400 V AC
• Energy limiting class: 3
• Terminal capacity: 0.75–35 mm² (solid), 0.75–25 mm² (stranded)

Our verdict

A robust MCB for three-phase circuits with moderate inrush currents, offering dependable protection and easy DIN rail mounting.