Siemens HEG3B100L Circuit Breaker 100A 3P 480V

Product Description

The SIEMENS HEG3B100L is a 3-pole, 100-amp molded case circuit breaker rated for 480 volts AC. It provides overcurrent and short-circuit protection in commercial and industrial power distribution systems. The HEG frame series is designed for higher-demand applications where reliable interruption capacity is required. Licensed electricians and electrical contractors install this breaker in panelboards, switchboards, and motor control centers. At 3 pounds, it is a compact unit for its amperage class. This breaker is suitable for branch-circuit and feeder protection in facilities where 480V three-phase power distribution is standard.

The HEG3B100L is used in commercial and light industrial settings where three-phase 480-volt distribution is required. Typical applications include feeder protection for HVAC equipment, motor loads, and general electrical distribution panels. It fits installations governed by NEC requirements for overcurrent protection on 480V three-phase circuits. Electrical contractors and licensed electricians working on commercial buildouts, equipment rooms, and mechanical systems will encounter this breaker in standard panelboard and switchboard assemblies.

Key Features

• 100-amp continuous current rating for branch and feeder circuit protection
• 3-pole configuration provides overcurrent protection on all three phases simultaneously
• 480-volt AC rating suitable for commercial and industrial three-phase distribution
• Molded case construction for durability in panel and switchboard enclosures
• HEG frame series designed for higher-demand overcurrent protection applications

Compatibility

Designed as an OEM-style replacement or direct-install molded case circuit breaker for commercial and industrial panelboards and switchboards accepting HEG-frame 3-pole breakers rated at 480 volts.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the panel or switchboard before handling or installing this breaker. Verify that the enclosure and busbar assembly are rated to accept the HEG frame before mounting. Do not exceed the breaker's rated ampacity when sizing the protected circuit.

Technical Specifications

• Amperage: 100 amps
• Poles: 3
• Voltage Rating: 480 volts AC
• Frame Series: HEG
• Weight: 3 pounds
• UPC: 78364352052

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: HEG3B100L