SCLD69400NGT - 400Amp Circuit Breaker

SCLD69400NGT - 400Amp Circuit Breaker

The Siemens SCLD69400NGT circuit breaker is a 400-amp, 3-pole molded case circuit breaker (MCCB) designed for your compatible commercial and industrial electrical distribution systems. Part of the Siemens SENTRON family, this LD-frame circuit breaker features a 600V AC voltage rating, current-limiting breaking-capacity construction, and a SensiTrip electronic trip unit with LSIG protection functions. For facility managers, electricians, and maintenance professionals working with established electrical equipment, the SCLD69400NGT offers a specific combination of electrical ratings, protection characteristics, and physical dimensions for form, fit, and functional replacement evaluation.

Key Features and Benefits

• 400-Amp Current Rating: Designed for electrical distribution applications requiring a 400A molded case circuit breaker.
• Three-Pole Configuration: Intended for compatible three-phase commercial and industrial electrical systems.
• 600V AC Voltage Rating: Provides a defined voltage rating for evaluating use in qualifying low-voltage installations.
• Siemens SENTRON Product Family: Identifies the breaker as part of Siemens' low-voltage molded case circuit breaker lineup.
• LD-Frame Construction: Supports evaluation of mounting dimensions and equipment compatibility in approved LD-frame installations.
• SensiTrip Electronic Trip Unit: Uses Siemens electronic trip technology with the specified LSIG protection configuration.
• Long-Time Overcurrent Protection: Addresses sustained overload conditions according to the trip unit's operating characteristics.
• Instantaneous Short-Circuit Protection: Responds to high-level short-circuit conditions through the instantaneous trip function.
• Ground-Fault Protection: Incorporates a ground-fault trip function for electrical systems designed to use this protection.

Technical Specifications

• Manufacturer: Siemens
  
• Product Line: SENTRON
  
• Catalog Number: SCLD69400NGT
  
• Manufacturer Part Number (MFN): SCLD69400NGT
  
• 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: LSIG
  
• Long-Time Protection: Yes
  
• Short-Time Protection: Yes
  
• Instantaneous Protection: Yes
  
• Ground-Fault Protection: Yes
  
• 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: 783643217638
  
• Commodity Code: 8536200020
  
• Siemens Product Group: 3741
  
• Catalog ID: LV10.1
  
• Group Code: P360
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489: Siemens states that the SCLD69400NGT meets UL 489 requirements applicable to molded case circuit breakers.
• IEC 60947-2: The manufacturer identifies compliance with 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 references its duty to communicate information concerning substances on the applicable REACH candidate list.

Where It Works Best

• Legacy Siemens LD-Frame Breaker Installations
  
• Compatible Commercial Power Distribution Systems
  
• Industrial Electrical Distribution Equipment
  
• Three-Phase Feeder Circuit Applications
  
• 400-Amp Electrical Distribution Circuits
  
• Compatible 480V AC Power Systems
  
• Compatible 600V AC Power Systems
  
• Electrical Systems Requiring LSIG Trip Functions
  
• Installations with Ground-Fault Protection Requirements
  
• Approved Switchboard Assemblies
  
• Industrial Facility Maintenance Projects