PXD63B120 - 1200 Amp Circuit Breaker

PXD63B120 - 1200 Amp Circuit Breaker

The Siemens PXD63B120 is a high-performance, low‑voltage molded case circuit breaker built to deliver dependable protection for demanding industrial and commercial electrical systems. Designed for 3‑pole applications at 1200 A, this breaker is equipped with a thermal‑magnetic trip unit that senses both overloads and short circuits — so you can trust it to react quickly and accurately if a fault arises. With a superior interrupting capacity of 25 kAIC at 600 V and 50 kAIC at 480 V, the PXD63B120 is engineered to manage heavy fault currents, safeguarding your electrical infrastructure and maintaining system reliability. Engineered to meet both UL 489 and IEC 60947‑2 standards, this breaker offers versatility and dependable performance for a broad range of installations.

Key Features and Benefits

• Thermal‑Magnetic Trip Unit: Combines overload and short‑circuit protection in one, giving you dependable safety and preventing damage from unexpected electrical surges.
• High Interrupting Capacity: With an interrupting rating of 25 kAIC at 600 V and 50 kAIC at 480 V, this breaker can safely clear high fault currents, protecting equipment and wiring downstream.
• Three‑Pole, 1200 Amp Rating: Ideal for heavy‑duty three-phase systems where substantial current loads are expected.
• Non‑Interchangeable Trip Mechanism: Prevents unauthorized trip unit swaps, ensuring system integrity and consistent protection over time.

Technical Specifications

• Rated Current: 1200 A
• Number of Poles: 3‑Pole
• Trip Unit Type: Thermal‑Magnetic
• Interrupting Capacity:
  • 25 kAIC @ 600 V
  • 50 kAIC @ 480 V
• Frame Size: PD
• Operating Temperature: Standard up to 40 °C
• Dimensions:
  • Height: 9 inches
  • Width: 16 inches
  • Depth: 6.19 inches
• Weight: 124.34 lb
• Lugs: Not included (breakers shipped without pre‑installed lugs)

Material Compliance and Certifications

• Industry Standards: The PXD63B120 meets critical safety and performance standards worldwide. It is UL‑listed under UL 489 for molded case circuit breakers and is compliant with IEC 60947‑2 requirements, making it suitable for installations that must adhere to stringent international electrical codes and regulations.

Where It Works Best

• Heavy‑duty manufacturing facilities and industrial plants powering large machinery.
• Commercial buildings and complexes with substantial three‑phase electrical loads.
• Data centers, warehouses, or facilities with critical infrastructure where high interrupting capacity is needed.
• Any installation requiring a durable, code‑compliant circuit breaker to ensure system protection, reliability, and long-term safety.