RXD63B180 - 1800Amp Circuit Breaker

RXD63B180 - 1800Amp Circuit Breaker

When you're maintaining a large electrical distribution system, choosing the right circuit breaker means paying attention to every detail—from frame size and trip configuration to voltage and interrupting ratings. The Siemens RXD63B180 is an 1800-amp, 3-pole molded-case circuit breaker from the Siemens SENTRON family, designed for electrical systems that require an RD-frame breaker with thermal-magnetic overcurrent protection. Rated for applications up to 600V AC, it provides an interrupting capacity of 25kA at 600V AC and 50kA at 480V AC, making it suitable for installations where those specific ratings meet the electrical system's requirements.

Key Features and Benefits

• 1800-Amp Current Rating: Designed for electrical distribution applications requiring an 1800A molded case circuit breaker.
• 3-Pole Configuration: Provides three-pole overcurrent protection for compatible three-phase electrical systems.
• Thermal-Magnetic Trip Protection: Combines thermal response to sustained overloads with magnetic response to short-circuit conditions.
• Siemens RD Frame: Provides a specific frame configuration for compatible Siemens electrical distribution equipment.
• Non-Interchangeable Trip Unit: Maintains the manufacturer's specified fixed trip-unit configuration for installations requiring this breaker design.
• No Lugs Installed: Supplied without terminal lugs, allowing installation requirements to be addressed using manufacturer-approved connection hardware.

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: RXD63B180
  
• Manufacturer Article Number: US2
  
• Product Series: SENTRON
  
• Product Family: RD6, 25kAIC, 600V AC
  
• Product Type: Molded Case Circuit Breaker (MCCB)
  
• Frame Type: RD
  
• Rated Current: 1800 Amps
  
• Number of Poles: 3
  
• Maximum Rated Voltage: 600V AC
  
• Interrupting Rating at 600V AC: 25kA (25,000 Amps)
  
• Interrupting Rating at 480V AC: 50kA (50,000 Amps)
  
• Breaking Capacity Classification: Standard
  
• Trip Mechanism: Thermal-Magnetic
  
• Trip Unit Configuration: Non-Interchangeable
  
• Temperature Calibration: 40°C
  
• Terminal Lugs: Not Installed
  
• Width: 9 inches
  
• Height: 16 inches
  
• Depth: 6.19 inches
  
• Net Weight: 59.789 lb
  
• Applicable Standards: UL 489 / IEC 60947-2
  
• UPC: 783643247604
  
• Country of Origin: Mexico
  
• Commodity Code: 85362099
  
• Siemens Catalog ID: LV10.1
  
• Product Group: 3741
  

Material Compliance and Certifications

The Siemens RXD63B180 molded case circuit breaker meets UL 489 and IEC 60947-2 standards, which address requirements for low-voltage circuit breakers and their electrical protection functions. These standards are particularly relevant when verifying equipment specifications for industrial and commercial electrical distribution systems.

The manufacturer also provides the following environmental compliance information:

• RoHS Compliance: Siemens reports compliance with applicable substance restrictions under the RoHS directive since April 2, 2009.
• REACH Article 33: Manufacturer REACH information is referenced, but specific substance details are not included in the supplied specifications.

Where It Works Best

• Existing Siemens RXD63B180 Circuit Breaker Replacements
  
• Compatible Siemens SENTRON Electrical Distribution Equipment
  
• Legacy Electrical Systems Using RD-Frame Breakers
  
• 1800-Amp Three-Phase Electrical Distribution
  
• Industrial Power Distribution Equipment
  
• Commercial Electrical Distribution Systems
  
• 480V AC Systems Requiring 50kA Interrupting Capacity
  
• 600V AC Systems Requiring 25kA Interrupting Capacity
  
• Electrical Equipment Maintenance and Repair