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ABB S5N400TW-4 - Molded Case Circuit Breaker 400A 600V

ABB
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ABB S5N400TW-4 is a 400A molded case circuit breaker from the SACE Isomax family, designed for thermal magnetic overcurrent protection with LI (Long-Time and Instantaneous) trip functions. This four-pole, three-phase unit is rated for 600VAC and delivers a 35kA interrupting capacity at 480VAC, with a bolt-on connection type for secure installation. The S5N frame construction weighs 12 lb and provides robust physical durability for industrial environments. It complies with industry standards for molded case circuit breakers, ensuring reliable performance in power distribution systems. Typical applications include industrial panelboards, switchboards, and motor control centers requiring precise overload and short-circuit protection.

Key Features & Specifications
  • Type: Molded Case
  • Family: SACE Isomax
  • Frame Size: S5
  • Current Rating: 400A
  • Voltage Rating: 600VAC
  • Poles: 4
  • Phase: 3
  • Protection: Thermal Magnetic
  • Trip Functions: LI - Long-Time and Instantaneous
  • Interrupting Capacity: 35kA@480V
  • Connection: Bolt-On
  • Weight: 12 lb