TJD432300 **Older Style** - 300Amp Circuit Breaker

TJD432300 **Older Style** - 300 Amp Circuit Breaker

The TJD432300 Older Style Black Face molded case circuit breaker is designed for dependable protection in your commercial and industrial electrical distribution systems that require a compatible replacement breaker for existing equipment. Built as part of the trusted Q-Line family, this 3-pole, 300-amp bolt-on circuit breaker features an internal common trip mechanism that helps you to protect connected systems by disconnecting all poles simultaneously during overloads or short circuits. Its 22kA interrupting capacity at 240VAC makes it well-suited for demanding power distribution applications where consistent circuit protection is essential.

This breaker includes load-side lugs for easier installation and secure conductor termination, helping reduce installation time in panelboards and switchgear setups. The older style black face design is often preferred when matching existing electrical infrastructure, making it a practical choice for maintenance teams, contractors, and facility managers working with legacy systems. HACR rating compatibility also supports use in heating, air conditioning, and refrigeration equipment applications where properly rated overcurrent protection is required. Built with durable molded case construction, the TJD432300 is made for long-term service in environments where reliable electrical protection matters every day.

Key Features and Benefits

• 300 Amp Current Rating: For commercial and industrial power distribution applications.
• 3-Pole Configuration: Designed for three-phase electrical systems.
• 22kA Interrupting Capacity at 240VAC: Helps protect equipment during fault conditions.
• Older Style Black Face Design: Supports form, fit, and functional replacement needs in existing installations.
• Bolt-On Mounting Style: Provides secure installation in compatible panelboards and distribution equipment.
• Internal Common Trip Mechanism: Disconnects all poles simultaneously during overload or short circuit events.
• Includes Load-Side Lugs: For convenient wiring connections.
• HACR Rated: For use with heating, air conditioning, and refrigeration equipment applications.
• Part of the Q-Line Series: Commonly used in commercial and industrial electrical systems.
• Molded Case Construction: Built for lasting service life in demanding environments.
  

Technical Specifications

• Part Number: TJD432300
  
• Series: Q-Line
  
• Type: TJD
  
• Product Style: Older Style Black Face
  
• Poles: 3
  
• Amperes: 300A
  
• 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.
• Construction: Molded Case Circuit Breaker
  

Material Compliance and Certifications

• HACR Rated: Approved for HVAC and refrigeration applications.
• Commercial and Industrial Use: Manufactured for use in compatible commercial and industrial electrical distribution systems.
• Molded Case Construction: Designed to meet common industry installation requirements.
• Overcurrent Protection Applications: Suitable for applications requiring properly rated overcurrent protection equipment.
  

Where It Works Best

• The TJD432300 circuit breaker is commonly used in commercial buildings and office facilities, industrial manufacturing environments, HVAC distribution systems, motor control and equipment protection applications, electrical panelboards and switchboards, maintenance and retrofit projects involving legacy Q-Line equipment, and facilities requiring compatible bolt-on molded case circuit breakers for existing systems. Its older style black face configuration makes it especially useful when maintaining consistency within existing electrical assemblies and replacing breakers in established installations where matching form and fit is important.