PD63B120 - 1200 Amp Circuit Breaker

PD63B120 - 1200 Amp Circuit Breaker

Upgrade your electrical system’s protection with the Siemens PD63B120 — a high‑capacity, low‑voltage molded case breaker built for serious commercial and industrial use. This dependable circuit breaker delivers reliable performance under heavy loads, giving you peace of mind that your wiring and equipment are safeguarded against overloads and short circuits. Engineered to meet rigorous safety standards, the PD63B120 is an excellent fit whenever reliability and compliance matter.

Key Features and Benefits

• High Current Capacity: With a 1200 A rating, this breaker is capable of handling large electrical loads, making it ideal for heavy‑duty industrial panels and main distribution systems.
• Thermal‑Magnetic Trip Unit: The built‑in thermal‑magnetic mechanism provides accurate, dual‑mode protection, responding swiftly to both overload and short‑circuit conditions.
• Strong Interruption Capability: Rated for 25 kAIC at 600 V and 50 kAIC at 480 V, this breaker ensures safe interruption of high fault currents to protect equipment and wiring.
• Space‑Saving Design: At just 9" × 16" × 6.19", the compact form factor makes installation into existing switchboards or panel boards straightforward — even in tight enclosures.
• Durable Construction: Built from high‑quality materials engineered for longevity, the PD63B120 performs well under demanding conditions, offering dependable service over time.

Technical Specifications

• Frame Type: PD Frame
  
• Current Rating: 1200 A
  
• Poles: 3
  
• Trip Unit: Thermal‑Magnetic
  
• Breaking Capacity:
  • 25 kAIC @ 600 V
  • 50 kAIC @ 480 V
• Dimensions:
  • Width: 9.0 inches
  • Height: 16.0 inches
  • Depth: 6.19 inches
• Wire Range: 300–600 KCM (Cu/Al)
  
• Lug Configuration: Line and load side lugs (TA5P600)
  

Material Compliance and Certifications

• UL Standards: The PD63B120 is engineered to meet industry‑leading safety and performance benchmarks. It complies with UL 489, the standard for molded case circuit breakers.
• IEC Standards: Meets IEC 60947‑2, which governs low-voltage switchgear and controlgear. These certifications mean the breaker adheres to strict requirements for interruption performance, thermal endurance, and overall reliability — assuring you that it’s built to perform safely under demanding conditions.

Where It Works Best

• The Siemens PD63B120 shines in environments where high current capacity and dependable protection are critical. It works particularly well in commercial buildings, industrial facilities, and large-scale panel boards — including main service panels, switchboards, and distribution panels. If your operation demands heavy-duty circuit protection for motors, HVAC systems, large machinery, or other substantial electrical loads, this breaker is a solid, safety‑conscious choice.