PB3900 - 900 Amp Circuit Breaker

PB3900 - 900 Amp Circuit Breaker

When your electrical system demands reliable power and smooth maintenance, the PB3900 900 Amp Circuit Breaker has your back. Tailored for industrial and commercial environments, this sturdy 3‑pole thermal‑magnetic breaker is built to handle high loads with safety and precision. Its rear‑connected design and 40 °C temperature rating make it a perfect drop‑in swap for existing systems—no sweeping upgrades needed—and it delivers dependable protection where you need it most.

Key Features and Benefits

• Reassuring 900 Amp Rating — Handles substantial electrical loads without breaking a sweat, keeping your systems safe and efficient.
• Thermal‑Magnetic Tripping Tech — Smartly merges thermal overload and magnetic short‑circuit protection to shield your circuits from damage and reduce downtime.
• Rear‑Connected Setup — Quickly slides into place in existing electrical panels, speeding up maintenance and avoiding unnecessary rework.
• High Temperature Tolerance — Rated for 40 °C environments, so it performs consistently even under warm conditions.

Technical Specifications

• Poles: 3
  
• Amperage: 900 A
  
• Interrupting Capacity (A.I.C.):
  • 100 kA @ 600 VAC
  • 100 kA @ 480 VAC
  • 125 kA @ 240 VAC
• Frame Type: PB
  
• Connection: Rear‑Connected
  
• Weight: Approx. 170 lb (77 kg)
  
• Dimensions:
  • Width: 12.06 inches
  • Length: 22.13 inches
  • Depth: 9.06 inches

Material Compliance and Certifications

• Built from high-quality components and tested against rigorous industry curves, the PB3900 meets global safety benchmarks to give you peace of mind. Each breaker is crafted to last, undergoes strict quality control, and complies with leading international standards for circuit protection.

Suitability

• Industrial Facilities — For maintenance teams replacing parts in heavy-duty electrical systems—without having to overhaul panel setups.
• Commercial Buildings — A great fit for electrical upgrades or equipment swaps in large-scale operations like shopping centers, office blocks, or data centers.
• Retrofitting and Upgrades — Perfect when you need a dependable replacement without changing everything else—just snap it in and get back up and running.