HJD63B300L - 300Amp Circuit Breaker

HJD63B300L - 300Amp Circuit Breaker

When you're replacing a circuit breaker, the right frame style, ratings, and connection configuration matter most. The Siemens HJD63B300L molded-case circuit breaker is designed for electrical systems that require a 300-amp, 3-pole breaker in the Siemens JD frame family. This low-voltage SENTRON circuit breaker features a thermal-magnetic trip unit, a 600V AC rating, and interrupting capacity ratings of 35kAIC at 600V and 65kAIC at 480V. With both line- and load-side lugs included, the HJD63B300L provides a practical replacement for compatible commercial and industrial electrical distribution equipment when maintaining the existing system configuration is important.

Key Features and Benefits

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

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HJD63B300L
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: JD
  
• Number of Poles: 3
  
• Amperage Rating: 300 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 Line and 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: 19.533 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens HJD63B300L 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 HJD63B300L works best in commercial and industrial electrical distribution applications where a matching 300-amp, 3-pole JD frame molded-case circuit breaker is required. It is suited for maintenance and replacement projects involving compatible switchboards, distribution equipment, and electrical systems designed around Siemens JD frame breakers.