BQ3B100 - 100Amp Circuit Breaker

BQ3B100 - 100Amp Circuit Breaker

The Siemens BQ3B100 is a 100-amp, 3-pole circuit breaker designed for use in 240-volt electrical distribution systems. It provides overcurrent and short-circuit protection for three-phase circuits and uses a common-trip design that opens all three poles at the same time when a fault occurs. This helps protect your wiring, equipment, and connected loads throughout the system.

Part of the Siemens Type BQ breaker family, the BQ3B100 is commonly installed in commercial buildings, warehouses, schools, manufacturing facilities, and other locations that rely on three-phase power. The bolt-on mounting design provides a secure connection in compatible panelboards, and load-side lugs are included to help simplify installation. With a 10kA interrupting rating, this breaker is suitable for a variety of branch circuit and feeder applications where a 100-amp, 3-pole breaker is specified.

Whether you're replacing an existing breaker or working on a new installation, the BQ3B100 offers the ratings and configuration needed for many everyday power distribution applications. Like other Siemens molded case breakers, it is built for long-term service and designed to meet the demands of regular operation.

Key Features and Benefits

• 100 amp continuous current rating
• 3-pole common-trip design
• Rated for 240 VAC applications
• 10kA interrupting capacity (AIR)
• Bolt-on mounting configuration
• Load-side lugs included
• Molded case circuit breaker construction
• Suitable for branch circuit and feeder protection
• Designed for three-phase electrical distribution systems
• UL 489 Listed

Technical Specifications

• Manufacturer: Siemens
• Catalog Number: BQ3B100
• Breaker Type: BQ
• Product Type: Molded Case Circuit Breaker (MCCB)
• Amp Rating: 100 Amps
• Number of Poles: 3
• Voltage Rating: 240 VAC
• Interrupting Rating: 10kA AIR
• Trip Type: Common Trip
• Connection Type: Bolt-On
• Width: 5 in.
• Height: 3.7 in.
• Depth: 13 in.
• Net Weight: 1.014 lb.
• UPC: 783643102668
• Country of Origin: Mexico

Material Compliance and Certifications

• UL 489 Listed
• Designed for low-voltage electrical distribution systems
• Export Classification: EAR99
• Manufactured in accordance with Siemens product standards

Where It Works Best

• The Siemens BQ3B100 is commonly used in panelboards and electrical distribution equipment serving commercial, industrial, institutional, and light manufacturing facilities. Typical applications include feeder circuits, branch circuits, HVAC equipment, motor loads, lighting systems, and general three-phase power distribution where a 100-amp, 3-pole circuit breaker is required.