QBHW1055 - 55 Amp Circuit Breaker

QBHW1055 - 55 Amp Circuit Breaker

The QBHW1055 is a 55-amp, single-pole thermal-magnetic circuit breaker with a bolt-on connection. It is rated at 22 kA at 120 VAC and is part of the QBHW breaker family. If you're replacing an existing breaker, those details are worth checking closely. A similar-looking breaker isn't always the right match.

This breaker uses thermal-magnetic protection to handle two common electrical problems. The thermal element responds to sustained overloads, while the magnetic element reacts to short-circuit conditions. The QBHW1055 is also HACR rated, so it can be used in applicable heating, air-conditioning, and refrigeration applications where a HACR-rated breaker is specified.

Space is another practical consideration. The breaker measures 3.41 inches high, 1 inch wide, and 2.92 inches deep, giving it a fairly compact footprint. It also carries a 40°C ambient temperature rating. For maintenance work or replacement projects, the QBHW1055 offers a straightforward combination of a 55A rating, a single-pole configuration, a bolt-on design, and a 22kA interrupting capacity.

Key Features and Benefits

• 55-amp rating for compatible circuits requiring 55-amp overcurrent protection.
• Single-pole design for applicable 120VAC applications.
• 22kA interrupting rating at 120VAC for systems requiring this level of fault-current interruption.
• Thermal-magnetic trip mechanism protects against sustained overloads and short circuits.
• A bolt-on connection provides a secure attachment to compatible electrical equipment.
• HACR rated for applicable heating, air-conditioning, and refrigeration applications.
• 40°C ambient rating for the specified operating conditions.
• At only 1 inch wide, the breaker takes up relatively little panel space.

Technical Specifications

• Part Number: QBHW1055
  
• Type: QBHW
  
• Amperage: 55A
  
• Poles: 1
  
• Voltage: 120VAC
  
• A.I.C. Rating: 22kA at 120VAC
  
• Trip Type: Thermal Magnetic
  
• Connection: Bolt-On
  
• HACR Rated: Yes
  
• Ambient Rating: 40°C
  
• Dimensions:
  • Height: 3.41 in.
  • Width: 1.00 in.
  • Depth: 2.92 in.

Material Compliance and Certifications

• The QBHW1055 is HACR-rated, an important consideration when the breaker is used with applicable heating, air-conditioning, or refrigeration equipment.
• No other material-compliance or certification information was included in the supplied specifications. For applications that require a specific listing, certification, or material compliance standard, confirm those requirements against the breaker's markings and the appropriate manufacturer documentation.

Where It Works Best

• The QBHW1055 works best in compatible panelboards and electrical distribution equipment that specifically call for a 55-amp, 1-pole QBHW bolt-on circuit breaker with a 22kA rating at 120VAC. Its HACR rating also makes it appropriate for qualifying HVAC and refrigeration applications.