TJD422300 **Older Style** - 300Amp Circuit Breaker

TJD422300 **Older Style** - 300 Amp Circuit Breaker

The TJD422300 Older Style Black Face molded case circuit breaker is designed for dependable circuit protection in your commercial and industrial electrical distribution systems, where compatibility with existing equipment is important. Built as part of the trusted Q-Line family, this 2-pole, 300-amp breaker features an internal common trip mechanism that helps you to protect connected systems during overloads and short-circuit conditions. Its bolt-on mounting configuration provides a secure installation fit, while the included load-side lugs simplify wiring connections in applicable panelboard and switchgear setups. With HACR rating capabilities, the TJD422300 is well-suited for HVAC-related applications along with a wide range of power distribution environments. The older-style black-face design also makes it a practical, form-, fit-, and function-compatible replacement option for maintaining legacy electrical systems that already use this breaker style. Built to last and engineered for long-term serviceability, this breaker remains a reliable choice for maintaining existing infrastructure.

Key Features and Benefits

• 300 Amp Molded Case Circuit Breaker: Designed for commercial and industrial power distribution applications requiring dependable circuit protection.
• 2-Pole Configuration: Suitable for 240VAC applications where coordinated dual-pole protection is required.
• 22k A.I.C. Rating: Rated at 22kA @ 240VAC for interrupting fault currents within the specified capacity.
• Older Style Black Face Design: Helps maintain compatibility with legacy electrical systems using this breaker style.
• Bolt-On Mounting Style: Provides a secure installation fit in applicable panelboards and distribution equipment.
• Internal Common Trip Mechanism: Enhances coordinated circuit protection during overload and short-circuit conditions.
• HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment applications.
• Includes Load-Side Lugs: Simplifies field wiring connections in compatible installations.
• Q-Line Design Compatibility: Commonly used in panelboards, switchboards, and distribution equipment.
• Built for Long Service Life: Engineered for durability in demanding electrical environments.
  

Technical Specifications

• Part Number: TJD422300
  
• Product Type: Molded Case Circuit Breaker
  
• Series / Type: TJD
  
• Frame Style: Older Style Black Face
  
• Poles: 2
  
• Amperage Rating: 300 Amps
  
• Voltage Rating: 240VAC
  
• A.I.C. Rating: 22kA @ 240VAC
  
• Mounting Type: Bolt-On
  
• Trip Type: Internal Common Trip
  
• HACR Rated: Yes
  
• Included Accessories: Load-Side Lugs
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: Rated for use with heating, air conditioning, and refrigeration equipment applications.
• Manufacturing Standards: Manufactured for use in accordance with applicable molded case circuit breaker standards.
• Q-Line Compatibility: Designed for compatibility with Q-Line distribution equipment and related electrical systems.
• Professional Installation: Intended for installation and servicing by qualified electrical professionals in accordance with local and national electrical codes.
  

Where It Works Best

• The TJD422300 circuit breaker is commonly used in commercial buildings, industrial facilities, HVAC systems, manufacturing environments, and electrical distribution panels requiring a 2-pole 300A breaker with bolt-on installation. It is particularly useful for maintaining or servicing existing systems that use older-style black-face TJD breakers, where matching form and fit are important for continued operation and equipment compatibility.