SCLD69400NT - 400Amp Circuit Breaker

SCLD69400NT - 400Amp Circuit Breaker

The Siemens SCLD69400NT circuit breaker is a 400-amp, 3-pole molded-case circuit breaker (MCCB) for your compatible commercial and industrial electrical distribution systems. Part of the Siemens SENTRON low-voltage circuit breaker lineup, this model combines a 600V AC voltage rating, LD-frame construction, and SensiTrip LSI electronic trip protection. For electricians, facility maintenance teams, and electrical contractors working with established equipment, the SCLD69400NT offers clear electrical and physical specifications to evaluate form, fit, and functional replacement.

Key Features and Benefits

• 400-Amp Current Rating: Designed for electrical distribution circuits requiring a 400A molded case circuit breaker.
• Three-Pole Configuration: Provides three-pole circuit protection for compatible three-phase electrical systems.
• 600V AC Voltage Rating: Suitable for evaluation in low-voltage electrical installations operating within the specified voltage rating.
• Siemens SENTRON Construction: Part of Siemens' established low-voltage molded case circuit breaker family.
• LD-Frame Design: Identifies the breaker frame and physical configuration for evaluating compatibility with existing equipment.
• SensiTrip Electronic Trip Unit: Incorporates Siemens electronic trip technology with the specified LSI protection functions.
• Long-Time Overload Protection: Addresses sustained overcurrent conditions according to the trip unit's operating characteristics.
• Short-Time Protection: Provides a timed trip response for qualifying overcurrent conditions, an important consideration in protective coordination.
• Instantaneous Short-Circuit Protection: Responds to high-level short-circuit conditions through the instantaneous trip function.
• Included TA2J6500 Lugs: Features line-side and load-side lugs for connections within the specified conductor ranges.

Technical Specifications

• Manufacturer: Siemens
  
• Product Line: SENTRON
  
• Catalog Number: SCLD69400NT
  
• Manufacturer Part Number (MFN): SCLD69400NT
  
• Siemens Article Number: US2
  
• Product Type: Molded Case Circuit Breaker (MCCB)
  
• Breaker Frame: LD
  
• Rated Current: 400 Amps
  
• Number of Poles: 3
  
• Rated Voltage: 600V AC
  
• Interrupting Capacity at 600V AC: 100kAIC
  
• Interrupting Capacity at 480V AC: 150kAIC
  
• Trip Unit Type: Electronic Trip Unit (ETU)
  
• Trip Technology: Siemens SensiTrip
  
• Trip Configuration: LSI
  
• Long-Time Protection: Yes
  
• Short-Time Protection: Yes
  
• Instantaneous Protection: Yes
  
• Ground-Fault Trip Function: Not included in the specified LSI configuration
  
• Breaking-Capacity Design: Current Limiting
  
• Standard Breaker Temperature Reference: 40°C
  
• Line-Side Lug Type: TA2J6500
  
• Load-Side Lug Type: TA2J6500
  
• Copper Conductor Range: 3/0 AWG–500 kcmil
  
• Aluminum Conductor Range: 4/0 AWG–500 kcmil
  
• Width: 7.50 inches
  
• Height: 17.86 inches
  
• Depth: 4.00 inches
  
• Net Weight: 34.00 lb
  
• UPC: 783643217621
  
• Commodity Code: 8536200020
  
• Siemens Product Group: 3741
  
• Catalog ID: LV10.1
  
• Group Code: P360
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens SCLD69400NT circuit breaker includes manufacturer-published standards and environmental information to support electrical equipment documentation and project-specific compliance reviews.

• UL 489: Siemens states that the SCLD69400NT meets UL 489 requirements applicable to molded case circuit breakers.
• IEC 60947-2: Siemens identifies the breaker as meeting IEC 60947-2, the international standard addressing low-voltage circuit breakers.
• RoHS Directive: Siemens reports compliance with applicable substance restrictions since March 30, 2009.
• REACH Article 33: Siemens provides a reference to its duty to communicate information about substances on the applicable REACH candidate list.
• WEEE Directive (2012/19/EU): Siemens lists take-back obligation classification 5 for this product.

Where It Works Best

• Legacy Siemens LD-Frame Breaker Installations
  
• Compatible Commercial Electrical Distribution Systems
  
• Industrial Power Distribution Equipment
  
• Three-Phase Feeder Circuit Applications
  
• 400-Amp Electrical Distribution Circuits
  
• Compatible 480V AC Electrical Systems
  
• Compatible 600V AC Electrical Systems
  
• Electrical Systems Designed for LSI Trip Protection
  
• Installations Requiring Long-Time and Short-Time Protection
  
• Approved Switchboard Assemblies
  
• Industrial Facility Maintenance Projects
  
• Existing Electrical Equipment Requiring Matching Breaker Dimensions