Siemens / ITE HJD63B300 300A 3 Pole MCCB – Bolt On – 600V

The Siemens / ITE HJD63B300 is a high interrupting capacity molded case circuit breaker engineered for robust protection in industrial and commercial electrical systems. Featuring a 300A thermal magnetic interchangeable trip unit, it delivers precise and reliable protection against overloads and short circuits. Built on the durable HJD (J Frame) platform, this breaker ensures strong fault-clearing capability and consistent performance under heavy electrical loads. Its bolt-on mounting design allows secure installation, while its multi-voltage compatibility supports a wide range of power distribution applications.

Product Specification:

• Manufacturer: Siemens / ITE
• Model: HJD63B300
• Frame Type: J Frame (HJD)
• Type: Molded Case Circuit Breaker (MCCB)
• Amperage: 300A at 40°C
• Poles: 3 Pole
• Connection Type: Bolt On
• Trip Unit: Thermal Magnetic Interchangeable
• Standard Lug Type: Line and Load Standard
• Warranty: 1 Year

Technical Specification:

• Interrupting Capacity: 100 kA @ 240V AC
• Interrupting Capacity: 65 kA @ 480V AC
• Interrupting Capacity: 35 kA @ 600V AC
• Interrupting Capacity: 30 kA @ 250V DC
• Trip Setting Range: 1250–2500
• Frequency: 50/60 Hz
• Frame Style: HJD (J Frame High Interrupting)
• Operating Mechanism: Fixed MCCB with interchangeable trip unit
• Terminal Type: Line and Load End Terminals

Voltage and Ratings:

• Rated Voltage: 240V AC / 480V AC / 600V AC
• DC Rating: 250V DC
• Maximum Voltage: 600V AC
• Rated Current: 300A
• Interrupting Ratings: 100kA / 65kA / 35kA (AC) and 30kA (DC)

Product Data:

• Product Type: High Interrupting Molded Case Circuit Breaker
• Application: Industrial and Commercial Electrical Protection
• Mounting Type: Bolt On
• Configuration: 3 Pole System
• Construction: Heavy-duty J Frame design
• Accessories: Compatible with configurable accessories (installation support available)
• Terminal Design: Standard Line and Load Terminals
• Warranty Support: 1-year in-house warranty for new and certified reconditioned units

Important Note:
This circuit breaker must be installed by a qualified electrician in accordance with electrical standards and system requirements. Improper installation or incorrect selection may result in equipment damage or safety hazards. Always verify voltage ratings, current capacity, and interrupting capacity before installation and operation.