5SY4640-7
The Siemens SENTRON 5SY4640-7 miniature circuit breaker features a 3P+N configuration, a C-type trip curve, a rated current of 40A, a rated voltage of 400V AC, a breaking capacity of 10kA, and a 35mm DIN rail mounting capability. It is suitable for overload and short-circuit protection of air conditioning, electric heating equipment, and power circuits.
Product Positioning
The 5SY4640-7 is a Siemens SENTRON 5SY4 series 3P+N miniature circuit breaker. It adopts a C-type tripping curve, has a rated current of 40A, a breaking capacity of 10kA, and an installation depth of 70mm. It is suitable for use in air conditioning, electric heating equipment, and power circuits.
Core Product Advantages and Features
C-type tripping curve
The instantaneous tripping current is approximately 5 to 10 times the rated current, which can withstand the inrush current of inductive loads such as motors and transformers, reducing false tripping.
3P+N four-line synchronous opening and closing
When all three phases plus the neutral line are disconnected simultaneously, the three-phase four-wire circuit can be completely isolated, making it suitable for three-phase power distribution with single-phase loads.
10kA interruption capacity
Rated short-circuit breaking capacity of 10kA according to IEC/EN 60898-1, suitable for power distribution in industrial and commercial buildings.
DIN rail quick installation
Standard 35mm DIN rail snap-fit installation; inlet and outlet terminals can be used with busbars, making installation and replacement convenient.