TJJ436350WL **Older Style** - 350Amp Circuit Breaker

TJJ436350WL **Older Style** - 350 Amp Circuit Breaker

Designed for dependable protection in your commercial and industrial electrical systems, the TJJ436350WL molded case circuit breaker is a 3-pole, 350-amp breaker built for applications requiring consistent overload and short-circuit protection. This older-style black-face breaker features a thermal magnetic trip unit with internal common trip functionality, helping you to maintain circuit integrity across connected phases. Built for use in legacy distribution systems where form, fit, and function compatibility matter, this breaker is commonly used in switchboards, panelboards, motor control systems, and power distribution equipment operating at up to 600VAC. Its cable-in/cable-out lug-lug configuration simplifies installation, while the included line and load-side lugs provide added convenience for field replacement projects. With HACR rating capabilities and durable molded case construction, the TJJ436350WL is built to last in demanding electrical environments.

Key Features and Benefits

• 350 amp molded case circuit breaker: Designed for commercial and industrial power distribution.
• 3-pole configuration: Designed for multi-phase electrical systems.
• Older style black face design: Compatible with existing equipment layouts.
• Thermal magnetic trip unit: Protects against overloads and short circuits.
• Internal common trip mechanism: Helps disconnect all poles simultaneously during fault conditions.
• Cable-in/cable-out (lug-lug) connection style: Supports straightforward installation.
• Includes both line-side and load-side lugs: Provides added convenience for field replacement projects.
• HACR rated: Suitable for heating, air conditioning, and refrigeration applications.
• Molded case construction: Designed for long service life in demanding environments.
• Replacement compatibility: Suitable for applications requiring matching form and fit characteristics.
  

Technical Specifications

• Part Number: TJJ436350WL
  
• Type: TJJ
  
• Breaker Style: Older Style Black Face
  
• Poles: 3
  
• Amperage Rating: 350A
  
• Voltage & A.I.C. Ratings:
  • 22k A.I.C. @ 600VAC
  • 30k A.I.C. @ 480VAC
  • 42k A.I.C. @ 240VAC
• Trip Unit: Non-Interchangeable Thermal Magnetic
  
• Trip Function: Internal Common Trip
  
• Connection Type: Cable-In/Cable-Out (Lug-Lug)
  
• Dimensions:
  • Height: 10.13 in.
  • Width: 8.25 in.
  • Depth: 3.81 in.

Material Compliance and Certifications

• HACR Rated: Designed and manufactured for use in commercial and industrial electrical distribution systems.
• Molded case design: Intended for reliable circuit protection and code-compliant installations when properly applied.
  

Where It Works Best

• The TJJ436350WL is commonly used in electrical distribution systems that require a 350-amp, 3-pole breaker with thermal-magnetic protection. It is well-suited for switchgear, panelboards, industrial control panels, HVAC equipment, and commercial building power systems where maintaining compatibility with existing legacy equipment is important. Its lug-lug configuration and older-style black-face design make it a practical replacement option for facilities seeking matching installation characteristics without modifying existing electrical setups.