SCLD69300NT - 300Amp Circuit Breaker

SCLD69300NT - 300Amp Circuit Breaker

The Siemens SCLD69300NT circuit breaker is a 300-amp, 3-pole molded case circuit breaker (MCCB) designed for compatible commercial and industrial electrical distribution systems. As part of the Siemens SENTRON product line, this LD-frame circuit breaker combines a 600V AC voltage rating, current-limiting breaking capacity, and electronic SensiTrip protection in a configuration designed for equipment requiring these characteristics. When you're maintaining an existing electrical installation, the right breaker is about more than amperage. Frame size, trip functions, interrupting ratings, conductor connections, and physical fit all matter.

Key Features and Benefits

• 300-Amp Current Rating: Designed for electrical circuits requiring a 300A molded case circuit breaker.
• Three-Pole Configuration: Intended for compatible three-phase power distribution applications.
• 600V AC Voltage Rating: Provides a defined voltage rating for applicable low-voltage electrical systems.
• Siemens SENTRON Construction: Identifies the breaker as part of Siemens' low-voltage molded case circuit breaker line.
• LD-Frame Design: Supports form and fit matching in electrical equipment approved for this frame and configuration.
• Electronic SensiTrip Unit: Provides the specified LSI overcurrent protection functions.
• Long-Time Protection: Addresses sustained overcurrent conditions according to the trip unit's operating characteristics.
• Short-Time Protection: Adds a separate short-time protection function for applicable short-circuit conditions.
• Instantaneous Protection: Responds to high-level short-circuit conditions through the instantaneous trip function.
• TA2J6500 Line and Load Lugs: Includes specified conductor connections on both sides of the breaker.

Technical Specifications

• Manufacturer: Siemens
  
• Product Line: SENTRON
  
• Catalog Number: SCLD69300NT
  
• Manufacturer Part Number (MFN): SCLD69300NT
  
• Article Number: US2
  
• Product Type: Molded Case Circuit Breaker (MCCB)
  
• Breaker Frame: LD
  
• Rated Current: 300 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 Protection: No
  
• 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: 783643217584
  
• Commodity Code: 8536200020
  
• Siemens Product Group: 3741
  
• Catalog ID: LV10.1
  
• Group Code: P360
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

Siemens provides standards and environmental compliance information for the SCLD69300NT 300-amp molded case circuit breaker. These details can assist electrical professionals and facility managers with product documentation and equipment selection.

• UL 489: Siemens states that the SCLD69300NT meets UL 489 requirements applicable to molded case circuit breakers.
• IEC 60947-2: Siemens identifies the product as meeting IEC 60947-2 requirements for low-voltage circuit breakers.
• RoHS Directive: Siemens reports compliance with applicable substance restrictions since March 30, 2009.
• REACH Article 33: Manufacturer documentation references the duty to inform concerning substances included on the applicable REACH candidate list.
• WEEE Directive (2012/19/EU): The manufacturer's take-back obligation field contains the value 5, without an explanation of its meaning. No specific take-back obligation is inferred from that entry.

Where It Works Best

• Compatible Commercial Electrical Distribution Systems
  
• Industrial Power Distribution Equipment
  
• Existing Siemens LD-Frame Breaker Installations
  
• Three-Phase Electrical Distribution Systems
  
• 300-Amp Feeder Circuit Protection
  
• Compatible 480V AC Electrical Systems
  
• Compatible 600V AC Electrical Systems
  
• Equipment Requiring LSI Electronic Trip Protection
  
• Legacy Switchboards Approved for This Breaker Configuration
  
• Commercial Facility Electrical Maintenance
  
• Industrial Facility Electrical Maintenance