LD63B400 Interchangeable Trip Circuit Breaker – Molded Case Circuit Breaker

The Siemens LD63B400 is a 3-pole interchangeable trip molded case circuit breaker designed for low voltage electrical distribution and protection applications. It is suitable for use by electrical distributors, lighting solutions providers, wire and cable specialists, and switchgear suppliers requiring reliable circuit protection up to 600 Volt AC and 500 Volt DC. This breaker features thermal magnetic trip technology with a standard breaking capacity, supporting continuous current ratings up to 400 Amps at 40°C ambient temperature.

Specifications

• Manufacturer: Siemens
• Frame Type: LD
• Current Rating: 400 Amp @ 40¬∞C
• Number of Poles: 3
• Interrupting Rating: 25 kA at 600 Volt AC / 500 Volt DC
• Voltage Rating: 600 Volt AC 50/60 Hz, 500 Volt DC
• Dimensions (W x D x H): 9 in x 7 in x 15 in
• Terminal Type: Line and Load Lug
• Wire Size Compatibility: 3/0 AWG to 500 kcmil Copper, 4/0 AWG to 500 kcmil Aluminum
• Approval: UL 489 Listed
• Compliance: REACH/WEEE Compliant
• Product Weight: 19.268 lbs
• Label Color: Blue

Features

• Interchangeable trip unit allows for flexible breaker configuration and maintenance
• Thermal magnetic trip technology provides reliable overcurrent and short-circuit protection
• Compact 3-pole design suitable for panelboards and switchgear applications
• High interrupting capacity supports industrial and commercial electrical systems
• Compatible with a wide range of copper and aluminum conductor sizes
• Designed for use in standard 40¬∞C ambient temperature environments
• UL 489 certification ensures compliance with North American safety standards

Downloads & Links

• Catalog
• Specification/Technical
• Installation/Operator