HB3B040 - 40Amp Circuit Breaker

HB3B040 - 40Amp Circuit Breaker

The Siemens HB3B040 is a 40 Amp, 3-pole BQ bolt-on molded case circuit breaker designed for use in compatible Siemens electrical distribution equipment. Rated for 240V AC with a 65kA interrupting capacity (AIC), it provides branch circuit protection by helping disconnect power during overloads and short circuits. Whether you're replacing a worn breaker or maintaining an existing electrical system, the HB3B040 is intended as a form, fit, and functional replacement for applications requiring the same electrical ratings, pole configuration, and mounting style.

Key Features and Benefits

• 40 Amp current rating
• Three-pole common-trip design
• Rated for 240V AC applications
• Bolt-on mounting for compatible Siemens panelboards
• BQ molded case circuit breaker
• Load-side lugs included
• Helps protect branch circuits from overloads and short circuits
• Form, fit, and functional replacement for compatible equipment
• Built to last for long-term use in properly matched electrical systems
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HB3B040
  
• Manufacturer Part Number (MFN): HB3B040
  
• Product Family: Branch Circuit Breakers
  
• Series: HBQ / BQ
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Design: BQ
  
• Poles: 3
  
• Trip Type: Common Trip
  
• Current Rating: 40 Amps
  
• Voltage Rating: 240V AC
  
• Interrupting Capacity: 65kA AIC
  
• Connection Type: Bolt-On
  
• Application: Electrical Distribution
  
• Load-Side Lugs: Included
  
• Dimensions: 3 in. D × 3 in. W × 4 in. H
  
• Package Dimensions: 2.756 in. L × 2.756 in. W × 3.937 in. H
  
• Net Weight: 1.124 lb.
  
• UPC: 783643111288
  
• Commodity Code: 8536200020
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489 Listed
• REACH Article 33 information available from the manufacturer
• RoHS compliance information not published by the manufacturer
• SCIP number not published by the manufacturer
• Install in accordance with applicable electrical codes and manufacturer instructions.
  

Where It Works Best

The Siemens HB3B040 is designed for use in compatible Siemens BQ bolt-on panelboards and electrical distribution systems requiring a 40 Amp, 3-pole, 240V circuit breaker with a 65kA interrupting capacity. It is well suited for maintenance, repairs, and replacing an existing breaker with the same electrical ratings and bolt-on configuration.