HJD63B400 - 400Amp Circuit Breaker

HJD63B400 - 400Amp Circuit Breaker

When a replacement circuit breaker is needed, matching your existing system specifications is the key to a proper fit. The Siemens HJD63B400 is a 400-amp, 3-pole molded-case circuit breaker designed for applications using the Siemens JD frame configuration. With line- and load-side lugs included, the HJD63B400 is designed for use in compatible commercial and industrial electrical distribution systems where maintaining the original breaker style, ratings, and connection setup is important.

Key Features and Benefits

• 400 amp, 3-pole molded case circuit breaker for compatible commercial and industrial electrical systems
• Siemens JD frame design for matching existing JD series breaker installations
• Thermal-magnetic trip unit for overload and short-circuit protection
• 600V AC rating for properly specified electrical applications
• Includes load side lugs (TA2J6500) for compatible installations

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HJD63B400
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: JD
  
• Number of Poles: 3
  
• Amperage Rating: 400 Amps
  
• Voltage Rating: 600 VAC
  
• Interrupting Capacity: 35kAIC at 600V / 65kAIC at 480V
  
• Trip Unit Type: Thermal-Magnetic
  
• Standards: UL 489 / IEC 60947-2
  
• Lug Type: TA2J6500 Load Side Lugs
  
• Copper Wire Range: 3/0 AWG - 500 kcmil
  
• Aluminum Wire Range: 4/0 AWG - 500 kcmil
  
• Dimensions: 7.5 in. W x 11 in. H x 4 in. D
  
• Weight: 0.022 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens HJD63B400 is part of the Siemens SENTRON low-voltage molded-case circuit breaker family and is designed for applications requiring compliance with recognized electrical industry standards.

Certifications and standards include:

• UL 489 — Molded Case Circuit Breakers and Circuit Breaker Enclosures
• IEC 60947-2 — Low-voltage switchgear and controlgear circuit breaker standard

Where It Works Best

The Siemens HJD63B400 works best in commercial and industrial electrical distribution applications where a matching 400-amp, 3-pole JD frame molded-case circuit breaker is required. It is commonly used in maintenance and replacement situations involving compatible switchboards, distribution equipment, and electrical systems designed around Siemens JD frame breakers.