LGA36400U31XYP - 400 Amp Circuit Breaker

LGA36400U31XYP  - 400 Amp Circuit Breaker

When safety and reliability are non‑negotiable, the Schneider Electric LGA36400U31XYP 400 Amp 3‑pole circuit breaker delivers peace of mind. Engineered for industrial and commercial power systems, this PowerPact L breaker features a MicroLogic 3.3 electronic trip unit, built‑in current limiting, and a padlockable handle to support secure operations. Whether it's installed in a large switchboard, feeder panel, or critical backup line, it’s designed to protect your assets from overloads, short circuits, and fault currents with accuracy and confidence.

Key Features and Benefits

• 400 A, 3‑Pole Capacity — Supports three‑phase loads in demanding installations.
• PowerPact L with I‑Line Mounting — Saves panel space and fits common retrofit or new build switchgear.
• MicroLogic 3.3 Electronic Trip Unit (LI Mode) — Allows precise protection settings, enhanced diagnostics, and overcurrent control with less nuisance tripping.
• Current Limiting Design — Limits let‑through energy in fault events, reducing stress on downstream conductors and equipment.
• Padlockable Handle — Enables mechanical lockout for safe maintenance or regulatory compliance.
• High Interrupting Ratings — Built to interrupt high fault currents at multiple system voltages without compromise.

Technical Specifications

• Rated Current (In): 400 A
• Poles: 3
• Voltage Rating: Up to 600 V AC (50/60 Hz)
• Interrupting / Breaking Capacity (AIC):
  • 65 kA @ 240 V AC
  • 35 kA @ 480 V AC
  • 18 kA @ 600 V AC
• Continuous Rating: 80% of nominal current (320 A)
• Trip Unit: MicroLogic 3.3 LI (electronic, current limiting)
• Conductor Size: AWG 3/0 to 500 kcmil, copper or aluminum
• Dimensions:
  • ~13.4 in H
  • 5.50 in W
  • 6.00 in D (~340 × 140 × 150 mm)
• Termination & Mounting: I‑Line terminals (line side), lug connections (load side), padlockable OFF/ON handle

Material Compliance and Certifications

• Certifications: This circuit breaker meets strict global standards. It is UL 489 listed, CSA certified, and conforms to IEC 60947‑2/‑3. It also carries CE marking, VDE, CCC, NMX, and NEMA ratings.
• Environmental Compliance: The front cover provides IP40 protection (suitable for enclosed switchgear use). Environmentally, it is RoHS‑compliant (with applicable exemptions) and satisfies REACH regulations.
• Operating Conditions: It functions reliably up to 2,000 m altitude without derating, and with adjustment can operate up to 5,000 m. Ambient temperature range: about –2 °C to +70 °C.

Where It Works Best

• This breaker is ideal for industrial power distribution, three‑phase service feeders, and critical equipment protection. It integrates smoothly into I‑Line panels and switchboards, especially in retrofit or expansion projects. Because of its high interrupting rating, it’s perfect for systems with potential fault currents such as main feeders, motor loads, or service entries. Use it in installations that demand precise protective control—where downstream equipment is sensitive to disturbances and nuisance trips must be minimized. The padlockable handle also makes it suited for environments with strict lockout/tagout or safety compliance protocols.