LH26400AC - 400 Amp Circuit Breaker

LH26400AC - 400 Amp Circuit Breaker

Meet the LH26400AC, a high-capacity molded-case circuit breaker engineered to deliver dependable protection for heavy duty electrical systems. With a rating of 400 A and dual-pole design, this breaker safeguards against overloads and short circuits across both AC and DC circuits. It’s built to handle demanding environments with confidence while ensuring safe, consistent performance.

Key Features and Benefits

• Thermal-Magnetic Trip Mechanism: Combines thermal sensing for sustained overloads with magnetic response to instantaneous surges, delivering balanced, all-around protection.
• High Fault Current Handling: Delivers up to 25 kA interrupting capacity at 600 VAC, and up to 50 kA at 250 VDC, making it capable of interrupting substantial fault currents.
• I-Line Design for Ease: Line side uses I-Line plug-in architecture while load side uses lug connections, simplifying mounting and wiring workflows.
• Push-to-Trip Function: Allows manual tripping for testing or maintenance without exposing live parts, boosting user safety and convenience.
• Built with Eco-Conscious Materials: Manufactured free of mercury, halogens, and PVC, and designed to meet restrictive substance standards as part of sustainable product practices.

Technical Specifications

• Rated Current: 400 Amps
• Maximum Voltage: 600 VAC, 250 VDC
• Number of Poles: 2 (dual pole)
• Interrupting Capacity:
  • 25 kA @ 600 VAC
  • 50 kA @ 250 VDC
• Line Connection: I-Line plug-in
• Load Connection: Mechanical lugs
• Mounting Mode: I-Line style
• Magnetic Hold Current: 2,000 A
• Magnetic Trip Current: 4,000 A
• Torque Rating: 115.06 lbf·in (≈13 N·m)
• Dimensions:
  • 11 in × 6 in × 5.84 in (279.4 mm × 152.4 mm × 148.34 mm)

Material Compliance & Certifications

• RoHS / REACh Conformant: Constructed without substances restricted by European chemical directives.
• UL 489 Listed: Certified for safety in molded-case circuit breaker applications.
• CSA and IEC Standards: Meets applicable Canadian and international electrotechnical standards.
• Green-Premium / Eco Design Focus: Engineered with lower environmental impact in mind, using materials and processes aligned with sustainability goals.

Where It Works Best

• This breaker excels in industrial or commercial settings where high fault currents and strict safety requirements are present. It’s ideal for applications such as factories, data centers, heavy machinery rooms, switchgear systems, and other installations needing reliable, high-capacity protection. Wherever you need dependable circuit interruption under heavy load or fault conditions, the LH26400AC is an excellent fit.