MJA36400 - 400 Amp Circuit Breaker

MJA36400 - 400 Amp Circuit Breaker

Looking for a circuit breaker that doesn’t just do the job, but does it right every time? The MJA36400 400A circuit breaker is engineered to keep your electrical systems protected and running smoothly in even the most demanding industrial environments. It’s rated for 600 VAC, handles up to 25 kA of interrupting current, and features a 3-pole configuration ideal for high-power distribution systems. What makes this model stand out is its ET 1.0 electronic trip unit, which delivers accurate protection against overloads and short circuits — helping you avoid costly downtime or equipment damage. Built with I-Line terminations on the line side and mechanical lugs on the load side, installation is straightforward and secure. Whether you’re upgrading an old panel or setting up a new system, this breaker is designed for fast, clean installs and easy maintenance. Plus, it meets top industry safety standards, so you can be confident it’s built to perform.

Key Features and Benefits

• Serious protection where it counts: 25kA interrupting rating at 600 VAC handles tough electrical faults with ease.
• Smarter trip unit: The ET 1.0 electronic trip unit gives you accurate, reliable fault detection without nuisance tripping.
• Tough and reliable: Built to last in industrial settings, with performance that holds up under pressure.
• Simple setup: I-Line bracket and mechanical lugs make for a quick, solid installation every time.
• Certified safe: Complies with UL, CSA, NOM, and IEC standards — no guesswork on safety or performance.

Technical Specifications

• Product Line: PowerPacT MJA Series
• Application: Electrical distribution
• Current Rating: 400 Amps
• Voltage Rating: 600 VAC (50/60 Hz)
• Interrupting Capacity: 25,000 Amps
• Poles: 3
• Trip Unit: ET 1.0 Electronic
• Magnetic Trip Setting: 4000 A
• Continuous Current Rating: 80%
• Insulation Voltage: 750 V
• Mounting: I-Line Bracket
• Dimensions (H × W × D): 12.86" × 8.27" × 8.05"
• Weight: 29 lb (13.15 kg)

Certifications & Compliance

• This breaker checks all the boxes — UL, CSA, NOM, CE, and IEC 60947-2 certified. It’s also RoHS and REACH compliant, and carries Schneider’s Green Premium label for eco-conscious manufacturing.
• The IP40 rating gives you peace of mind in areas with moderate dust exposure.

Where It Works Best

• The MJA36400 is an excellent fit for factories, commercial buildings, data centers, and industrial facilities where reliable power protection is non-negotiable. Whether you're managing complex electrical loads or just need a circuit breaker that’s going to hold up day after day, this unit delivers the performance and peace of mind you need.