HLD63B350L - 350Amp Circuit Breaker

HLD63B350L - 350Amp Circuit Breaker

When you're replacing a circuit breaker in existing equipment, the details matter—and the Siemens HLD63B350L gives you a clearly defined set of specifications to match against your application. This SENTRON LD-frame molded case circuit breaker is rated at 350 amps, has 3 poles, and is designed for systems up to 600 VAC. Simply put, the HLD63B350L is built to last and makes sense when its exact electrical ratings, dimensions, connections, and LD-frame configuration match the system's requirements.

Key Features and Benefits

• 350A, 3-pole design for compatible three-phase electrical systems.
• Rated for applications up to 600 VAC.
• Uses a thermal-magnetic trip unit.
• Standard 40°C breaker configuration.
• Includes TA2J6500 line- and load-side lugs.
• Handles 3/0 AWG to 500 kcmil copper conductors.
• Handles 4/0 AWG to 500 kcmil aluminum conductors.
• Measures 7.5 × 11 × 4 inches, making physical dimensions easy to check against an existing installation.
• Meets UL 489 and IEC 60947-2 standards.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HLD63B350L
  
• Article Number: US2\:HLD63B350L
  
• Series/Product Family: HLD6
  
• Breaker Type: Molded Case Circuit Breaker
  
• Frame: LD
  
• Trip Type: Thermal-Magnetic
  
• Ampere Rating: 350A
  
• Poles: 3
  
• Maximum Voltage: 600 VAC
  
• Interrupting Rating at 600V: 35 kAIC
  
• Interrupting Rating at 480V: 65 kAIC
  
• Standard Temperature Rating: 40°C
  
• Line-Side Lugs: TA2J6500
  
• Load-Side Lugs: TA2J6500
  
• Copper Conductor Range: 3/0 AWG–500 kcmil
  
• Aluminum Conductor Range: 4/0 AWG–500 kcmil
  
• Dimensions (W × H × D): 7.5 × 11 × 4 in.
  
• Net Weight: 19.533 lb
  
• UPC: 783643008618
  
• Commodity Code: 8536200040
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The HLD63B350L complies with UL 489 and IEC 60947-2 standards. Those certifications are particularly useful when you're confirming that a replacement breaker meets the requirements of the equipment or application.

Manufacturer specifications also provide REACH Article 33 information. RoHS substance-restriction compliance information and a SCIP number are listed as unavailable in the supplied manufacturer data.

Where It Works Best

The Siemens HLD63B350L is a natural fit for maintenance and replacement jobs involving equipment designed around a 350A, 3-pole LD-frame breaker rated at 600 VAC. It's especially relevant in existing and legacy electrical systems where you're trying to preserve the original form, fit, and function rather than change the equipment configuration.

Before using one as a replacement, check more than the amperage printed on the breaker. The LD frame, three-pole configuration, voltage, interrupting rating, thermal-magnetic trip, lug arrangement, conductor range, and physical dimensions should all agree with the requirements of the existing installation. Breaker selection and installation should ultimately be confirmed by qualified electrical personnel and follow applicable equipment requirements and electrical codes.