The Siemens 5SY4640-7 is a 3+N-pole miniature circuit breaker rated at 400 V and 40 A, with a breaking capacity of 10 kA and a device depth of 70 mm. It features a C-curve tripping characteristic and is ideal for applications with moderate inrush currents. Designed for easy DIN rail mounting, this modular breaker ensures quick installation and reliable circuit protection against overloads and short circuits in low-voltage distribution systems.
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