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Siemens KM3T400 - Thermal Magnetic Circuit Breaker 400A 600V

Siemens
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Siemens KM3T400 is a three-pole molded case circuit breaker from the K Frame family, designed to provide thermal magnetic protection with LI (Long-Time and Instantaneous) functions for industrial power distribution systems. It is rated for a maximum amperage of 400A and a voltage rating of 600V, with an interrupting rating of 50kA at 480V. The unit weighs 3 lb and features a bolt-on mounting type, compatible with KM series frames. It is UL Listed per UL 489 standards, ensuring reliable overcurrent protection in commercial and industrial applications.

Key Features & Specifications
  • Type: Trip Units & Programmers
  • Family: K Frame
  • Weight: 3 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Protection: Thermal Magnetic
  • Compatible Frames: KM
  • Amperage Maximum: 400A
  • Interrupting Rating: 50kA at 480V
  • Mounting Type: Bolt-On
  • Certifications: UL Listed (per UL 489 standards)