BQD120 - 20Amp Circuit Breaker

BQD120 - 20Amp Circuit Breaker

Looking for a BQD120? You're probably replacing an existing breaker or confirming a part number before starting a job. This 20 amp, single-pole Siemens circuit breaker is part of the BQD series and is rated for 277VAC with a 14kA interrupting capacity. If those specifications match what's already installed, you're on the right track.

The BQD120 uses a thermal-magnetic trip unit and is designed for compatible Siemens panelboard applications. It's commonly found protecting lighting and branch circuits in commercial buildings where 277-volt systems are used.

Whether you're servicing a school, office building, warehouse, healthcare facility, or retail property, matching the original breaker is often the easiest way to keep a project moving. The BQD120 is built to last and intended for equipment that requires a 20 amp, 1-pole, 277VAC breaker with a 14kA interrupting rating.

Key Features and Benefits

• 20 amp current rating
• Single-pole configuration
• Rated for 277VAC applications
• Siemens BQD series breaker
• Thermal-magnetic trip unit
• 14kA interrupting capacity
• Panelboard mounting design
• Low-tab electrical connection
• Molded case circuit breaker construction
• Designed for applications requiring BQD-series compatibility
• Built to last

Technical Specifications

• Manufacturer: Siemens
• Catalog Number: BQD120
• Product Series: BQD
• Circuit Breaker Type: Molded Case Circuit Breaker
• Poles: 1
• Amperage Rating: 20 Amps
• Voltage Rating: 277VAC
• Interrupting Capacity: 14kA
• Frequency Rating: 50/60 Hz
• Trip Unit Type: Thermal-Magnetic
• Mounting Style: Panelboard Mount
• Electrical Connection Type: Low Tab
• Frame Size: 100A
• Maximum Ambient Operating Temperature: 40°C
• Dimensions: 4 in. D × 3 in. W × 1 in. H
• Approximate Weight: 0.584 lbs.
• Country of Origin: Mexico

Material Compliance and Certifications

• UL 489 Listed
• CSA C22.2 Compliant
• IEC 60947-2 Compliant
• RoHS Compliant
• REACH Information Available
• WEEE Take-Back Obligations Applicable

Where It Works Best

• Common applications include lighting panels, control circuits, panelboards, and electrical distribution equipment in offices, schools, hospitals, retail buildings, warehouses, and manufacturing facilities.
• For replacement projects, the most important details are usually the breaker series, amperage rating, voltage rating, pole count, and interrupting capacity. The BQD120 matches equipment designed around those specifications.