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Siemens LD63T400 - Thermal Magnetic Trip Unit 400A 600V

Siemens
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Siemens LD63T400 is a 3-pole thermal magnetic trip unit designed for overload and short-circuit protection within Siemens Sentron Series LD frame molded case circuit breakers. This interchangeable trip unit is rated for 400A continuous current and 600V AC operation, providing LI (Long-Time and Instantaneous) protection functions. Weighing 6 lb, it is compatible with LD, LXD, HLD, HLXD, HHLD, and HHLXD frame breakers, ensuring reliable performance in industrial and commercial power distribution systems. The unit meets industry standards for thermal magnetic protection, delivering consistent and accurate fault response in demanding electrical environments.

Key Features & Specifications
  • Type: LD
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Amperage Minimum: 400
  • Amperage Maximum: 400
  • Protection: Thermal Magnetic
  • Compatible Frames: LD, LXD, HLD, HLXD, HHLD, HHLXD, CLD
  • Weight: 6 lb
  • Continuous Current Rating: 400A
  • Mounting Type: Interchangeable Trip Unit
  • Interrupt Rating: 25kA at 600V
  • Application: Molded Case Circuit Breakers
  • Compatible Breaker Types: LD6 Series


Part Number: LD63T400