CND63B100 - 1000Amp Circuit Breaker

CND63B100 - 1000Amp Circuit Breaker

The CND63B100 Siemens SENTRON molded case circuit breaker is a 1000 Amp, 3-pole ND frame breaker built for high-capacity power distribution systems where larger electrical loads need dependable protection and consistent system operation. In real-world use, this breaker is typically found in main service switchboards, industrial distribution equipment, and large commercial electrical systems running on 480V and 600V AC power.

In practice, this is the type of breaker you’ll see in established electrical infrastructure rather than small or standalone setups. It’s commonly used in Siemens ND frame assemblies, where maintaining system compatibility is important during replacement or maintenance work. Instead of redesigning a panel, this breaker fits into existing equipment to help keep systems running the way they were originally configured.

This unit is 40°C rated and comes with line and load side lugs (TA4N8500), helping simplify installation in compatible Siemens equipment. It accepts 250–500 kcmil copper or aluminum conductors, making it suitable for larger feeder applications where heavier wiring is required. The 3-pole design ensures all phases disconnect together during a fault, which is standard in three-phase distribution systems.

At its core, the CND63B100 is used to keep existing Siemens ND frame systems operating as intended — matching form, fit, and function in established electrical infrastructure.

Key Features and Benefits

• 1000 Amp, 3-pole Siemens ND frame molded case circuit breaker
• Designed for Siemens SENTRON power distribution systems
• Thermal-magnetic trip unit for overload and short-circuit protection
• Current-limiting design for controlled fault response
• High interrupting ratings: 100kA @ 480V, 65kA @ 600V
• Includes line and load side lugs (TA4N8500)
• Accepts 250–500 kcmil Cu/Al conductors
• 40°C rated for defined operating conditions
• 3-pole simultaneous disconnect for three-phase systems
• Used in feeder and main service applications
• Built for compatibility with existing ND frame installations

Technical Specifications

• Catalog Number: CND63B100
• Product Type: Molded Case Circuit Breaker
• Frame Type: ND Frame
• Amperage Rating: 1000 Amps
• Poles: 3
• Voltage Rating: 600V AC
• Interrupting Rating: 100kA @ 480V; 65kA @ 600V
• Trip Unit: Thermal-Magnetic
• Temperature Rating: 40°C
• Conductor Range: 250–500 kcmil Cu/Al
• Included: Line and load side lugs (TA4N8500)
• Dimensions: 9 in W x 16 in H x 6 in D
• Net Weight: 54 lb

Material Compliance and Certifications

The CND63B100 Siemens SENTRON breaker is designed to meet UL 489 and IEC 60947-2 standards for industrial molded case circuit breakers used in electrical distribution systems. It is intended for installation in compatible Siemens ND frame assemblies and should always be installed by qualified electrical personnel following applicable codes and manufacturer guidelines.

Where It Works Best

• Commercial and industrial power distribution systems
• Siemens SENTRON switchboards and panelboards
• Main service and feeder circuit protection
• Large facilities with high electrical load demand
• 480V and 600V three-phase systems
• Electrical infrastructure maintenance and replacement work
• Engineered distribution systems requiring high fault capacity coordination