LJA36400U33X - 400 Amp Circuit Breaker

LJA36400U33X - 400 Amp Circuit Breaker

Protect your electrical systems reliably with the LJA36400U33X circuit breaker from Schneider Electric. Designed for commercial and industrial environments, this 400-amp, 3-pole breaker handles demanding loads with ease, delivering dependable performance, enhanced safety, and advanced monitoring capabilities.

Key Features and Benefits

• High-Load Capacity: At 400 A and up to 600 VAC, this breaker can support heavy-duty systems without strain.
• Precision Protection: The built-in MicroLogic 3.3S electronic trip unit gives you fine control over long-time, short-time, and instantaneous trip settings, helping to prevent nuisance trips while offering safe protection.
• Durable Contact Design: Dual-break rotating contacts minimize peak currents during short circuit events, which extends the life of internal components.
• Easy Installation: I-Line mounting and mechanical lugs on the load side simplify integration and reduce installation time.
• Innovative Monitoring Options: With Modbus and Ethernet interfaces, you can monitor and control the breaker remotely for real-time diagnostics.
• Continuous Performance: Rated for 80% continuous operation, it can handle sustained loads without overheating or degradation.

Technical Specifications

• Voltage Rating: 600 VAC
  
• Interrupting Capacity: 25 kA at 600 VAC
  
• Poles: 3
  
• Trip Unit: MicroLogic 3.3S
  
• Continuous Current Rating: 80%
  
• Dimensions (H × W × D): 13.39″ × 5.51″ × 4.33″ (340 × 140 × 110 mm)
  
• Weight: 13.67 lb (6.2 kg)
  
• Mounting: I-Line bracket, mechanical lugs on load side
  
• Phase Connection: A, B, C
  
• Communication Interfaces: Modbus, Ethernet
  

Material Compliance and Certifications

• Safety Approvals: Certified to UL 489, CSA, NEMA, IEC 60947-2, and CE, meeting global electrical safety norms.
• Environmental Standards: Fully compliant with RoHS and REACh, underscoring its low ecological impact.
• Ingress Protection: Front cover rated IP40, suitable for controlled indoor enclosures.
• Operating & Storage Range: Functions reliably from –25 °C to 70 °C (–13 °F to 158 °F); safe storage from –50 °C to 85 °C (–58 °F to 185 °F).

Where It Works Best

• This breaker shines in industrial control panels, main disconnects, and commercial power distribution systems where both high current capability and reliable protection are required. Whether used as a main breaker or as part of a distribution array, it is well suited to harsh electrical environments and demanding load conditions. Pairing it with compatible accessories and remote monitoring tools further boosts flexibility and diagnostic reach.