LA36300 - 300 Amp Circuit Breaker

LA36300 - 300 Amp Circuit Breaker

Upgrade your power distribution with the Square D LA36300 I‑Line circuit breaker — engineered for dependable protection in demanding commercial and industrial settings. This 3‑pole, 300A breaker is purpose-built to guard circuits from overloads and short circuits, maintaining system stability and safety even under severe conditions.

Key Features and Benefits

• High Capacity Performance: Rated at 300 amps, this breaker handles heavy loads with confidence.
• Thermal‑Magnetic Trip Technology: Combines heat-sensitive overload protection with instantaneous magnetic trip for fast response to short circuits.
• I‑Line Plug‑in Design: Enables easy installation and integration into existing panelboards without rewiring.
• High Interrupting Rating: Delivers 22 kA at 600 VAC — ideal for robust protection in high-power environments.
• Built for Harsh Conditions: Durable construction resists wear, reducing long-term maintenance.
• Accessory Compatibility: Supports a wide range of field-installable add-ons to adapt to site-specific needs.

Technical Specifications

• Product Type: Molded‑case circuit breaker
  
• Trip Unit: Thermal‑magnetic
  
• Rated Current: 300 A
  
• Poles: 3 (three)
  
• Voltage Rating: 600 VAC / 250 VDC
  
• Breaking Capacity: 22 kA @ 600 VAC
  
• Mounting Mode: I‑Line plug‑in
  
• Line Connection: I‑Line on line side, lugs on load side
  
• Terminal Identifier: AL400LA
  
• Dimensions:
  • Height: 11 in (279.4 mm)
  • Width: 6 in (152.4 mm)
  • Depth: 5.84 in (148.34 mm)
• Weight: ~18.15 lbs (≈ 8.25 kg)
  

Material Compliance and Certifications

• Certifications: UL 489 Listed, CSA & IEC Certified — meets rigorous safety and performance standards.
• Environmental Compliance: Green Premium / RoHS / REACh Compliant — manufactured without hazardous substances like mercury, halogens, or PVC.
• Eco-conscious Design: Minimal recycling constraints and materials selected for environmental performance.

Where It Works Best

• The LA36300 I‑Line circuit breaker is perfect for high-demand commercial and industrial systems where reliability matters. Use it in distribution panels, equipment rooms, or critical load centers that require dependable overload and short-circuit protection. It’s especially suited for environments where retrofitting is needed—thanks to its plug-in I‑Line form factor. Whether you're installing new infrastructure or upgrading an existing setup, this breaker gives you the safety, flexibility, and performance your system deserves.