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Siemens 5SY4340-7 - Thermal Magnetic Breaker 40A 400V 3-Pole

Siemens
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Siemens 5SY4340-7 Circuit Breaker is a thermal-magnetic miniature circuit breaker designed for overcurrent protection in industrial electrical systems. It is rated for 400V AC, 3-phase operation, with a continuous current rating of 40A, providing long-time and instantaneous (LI) protection functions. The unit features a 3-pole, feed-thru connection configuration, weighing 1 lb, and is part of the 5SY4 series with a compact frame size for panel mounting. It complies with applicable IEC standards for industrial circuit protection. Typical applications include motor control centers, distribution panels, and machinery requiring reliable short-circuit and overload protection in 3-phase systems.

Key Features & Specifications
  • Type: Thermal Magnetic Miniature Circuit Breaker
  • Voltage Rating: 400V AC
  • Current Rating: 40A
  • Poles: 3
  • Phase: 3
  • Protection: LI (Long-Time and Instantaneous)
  • Connection: Feed-Thru
  • Weight: 1 lb
  • Family: 5SY Series
  • Type: 5SY4
  • Functions: LI - Long-Time and Instantaneous


Product Identification
  • UPC: 75455487640
  • GTIN: 00754554876405