MDL3400 - 400 Amp Circuit Breaker

MDL3400 - 400 Amp Circuit Breaker

Delivering dependable protection without the fuss, the Eaton MDL3400 (Series C) molded case circuit breaker combines smart engineering with user‑friendly features. Designed for enterprise-grade electrical setups, this breaker brings solid safety performance and easy installation—all wrapped up in a clean, efficient package.

Key Features and Benefits

• High fault‑current toughness: Rated for an impressive 65 kAIC at 240 Vac and 50 kAIC at 480 Vac, this breaker can handle tough short‑circuit conditions with confidence.
• Consistent trip performance: Featuring fixed thermal and fixed magnetic trip settings that work reliably out‑of‑the‑box, no finicky calibrations needed.
• Built to endure: With a sturdy, well‑made build, the MDL3400 stands up to demanding conditions—ideal for both indoor and covered outdoor installations.
• Compact and manageable: At only 22.86 cm × 12.7 cm × 12.7 cm and weighing around 1.31 kg, it’s light enough for fast, hassle‑free mounting.
  
• Trusted legacy: Part of Eaton’s Series C line—renowned for performance—and backed by a warranty (one year from installation or eighteen months from shipment).
  

Technical Specifications

• Amperage Rating: 400 A
  
• Voltage Rating: 600 Vac and 250 Vdc
  
• Frequency: 50 / 60 Hz
  
• Interrupting Ratings:
  • 65 kAIC (240 Vac)
  • 50 kAIC (480 Vac)
• Poles: Three‑pole configuration
  
• Trip Mechanism: Fixed thermal and magnetic trip
  
• Frame Type: MDL
  

Material Compliance and Certifications

• UL Listed: Meets strict safety benchmarks for performance
• Compliant with Eaton Selling Policy 25‑000: Ensures consistent quality and reliability
  

Suitability

• If you're safeguarding critical electrical systems—whether in manufacturing plants, commercial buildings, or utility setups—the MDL3400 is the go‑to choice. It combines dependable fault protection with a compact, installation‑friendly design. No matter if you're working in a sprawling factory or a busy service space, this breaker gives you peace of mind with minimal hassle.