LAL36300 - 300 Amp Circuit Breaker

LAL36300 - 300 Amp Circuit Breaker

Engineered for demanding industrial environments, the Square D LAL36300 is a high-performance 3-pole molded-case circuit breaker rated at 300 A and 600 VAC (with 250 VDC capability). It delivers dependable protection against overloads and short circuits via a thermal-magnetic trip mechanism. Ideal for new installations or system upgrades, this breaker is built for long service life under heavy duty use.

Key Features and Benefits

• Dual-Mode Protection: Thermal element handles sustained overcurrent; magnetic trip instantly interrupts high fault currents, safeguarding sensitive components.
• Push-to-Trip Feature: Allows manual tripping without exposing live parts, making maintenance and testing safer and easier.
• Flexible Mounting Options: Compatible with both unit mount and I-Line configurations to fit diverse panel layouts.
• High Interrupting Capacity: Capable of interrupting fault currents up to 22 kA at 600 VAC and 10 kA at 250 VDC.
• Wide Wire Range Support: Accepts heavy conductors (e.g., AWG 1 to 600 kcmil line side, AWG 1 to 250 kcmil load side) with proper torque.
• HACR-Rated: Approved for use in heating, air conditioning, and refrigeration systems, offering broad HVAC compatibility.

Technical Specifications

• Amperage: 300 A
  
• Voltage Rating: 600 VAC / 250 VDC
  
• Poles: 3
  
• Interrupting Rating:
  • 22 kA @ 600 VAC
  • 10 kA @ 250 VDC
• Trip Technology: Thermal-magnetic
  
• Mounting: Unit mount / I-Line
  
• Wire Size Range: AWG 1 to 600 kcmil (line), AWG 1 to 250 kcmil (load)
  
• Dimensions (H × W × D):
  • Height: 11 in
  • Width: 6 in
  • Depth: 5.84 in
• Tightening Torque: ~13 N·m (115 lbf·in)
  
• Standards & Certifications: UL 489 Listed, CSA Certified, IEC Compliance, RoHS/REACH adherence
  

Material Compliance and Certifications

• RoHS & REACH: This circuit breaker complies with RoHS and REACH standards, meaning it's free from harmful substances and aligned with global environmental regulations.
• UL & CSA: It is UL 489 listed and CSA certified, affirming its safe operation under industrial settings.
• IEC Compliance: The design respects international IEC safety standards.
• Eco-Forward Design: As part of an eco-forward product line, it emphasizes transparency in environmental impact and long lifecycle value.

Where It Works Best

• The LAL36300 is ideal in industrial plants, manufacturing facilities, and large commercial electrical systems where high fault currents must be controlled reliably. Because of its HACR rating and strong interrupting power, it’s equally suited for HVAC control panels, motor control centers, switchgear, and power distribution boards. Whether protecting large machinery or central power buses, it’s a top choice for electricians and engineers who need consistent, dependable performance.