BQ3B090 - 90Amp Circuit Breaker

BQ3B090 - 90Amp Circuit Breaker

The Siemens BQ3B090 is a 90 amp, 3-pole molded case circuit breaker designed to provide dependable overcurrent protection in commercial and industrial electrical distribution systems. Built as part of Siemens' trusted Type BQ breaker family, this common-trip breaker is rated for 240 VAC operation and features a 10 kA interrupting capacity, helping protect your conductors and connected equipment from overloads and short circuits. Whether you're using it for branch circuits, feeder applications, or equipment protection, the BQ3B090 delivers the performance and reliability electrical professionals expect from Siemens circuit protection products.

Key Features and Benefits

• 90 amp continuous current rating for demanding electrical distribution applications
• 3-pole common-trip design helps disconnect all phases simultaneously during a fault condition
• Rated for 240 VAC systems
• 10 kA interrupting capacity (AIR)
• Bolt-on mounting design provides a secure and stable installation
• Load-side lugs included for added installation convenience
• Siemens Type BQ molded case circuit breaker construction
• Suitable for branch circuit protection and power distribution applications
• UL 489 listed for compliance with recognized safety standards
• Compact design fits compatible Siemens panelboards and distribution equipment

Technical Specifications

• Manufacturer: Siemens
• Catalog Number: BQ3B090
• Product Family: Branch Circuit Breakers
• Breaker Type: BQ
• Ampere Rating: 90 Amps
• Number of Poles: 3
• Voltage Rating: 240 VAC
• Interrupting Rating: 10 kA AIR
• Trip Type: Common Trip
• Connection Type: Bolt-On
• Electrical Distribution Application: Yes
• Load Side Lugs: Included
• Depth: 3 in.
• Width: 3 in.
• Height: 4 in.
• Net Weight: 1.014 lb.
• Country of Origin: Mexico

Material Compliance and Certifications

• UL 489 Listed
• Manufactured to Siemens quality standards for low-voltage power distribution applications
• Classified as a molded case circuit breaker (MCCB)
• Active Siemens product lifecycle status
• Designed for use in accordance with applicable electrical installation codes and equipment specifications

Where It Works Best

• The Siemens BQ3B090 is commonly used in commercial buildings, retail facilities, schools, office complexes, light industrial environments, and other electrical distribution systems requiring reliable three-phase circuit protection. It is well suited for branch circuits, feeder circuits, distribution panels, HVAC equipment, motor-related applications, and general power distribution where a 90 amp, 3-pole, 240-volt circuit breaker is specified.