Q340H - 40Amp Circuit Breaker

Q340H - 40Amp Circuit Breaker

When you're looking for a Q340H circuit breaker, getting the specifications right matters. The Q340H is a 40-amp, 3-pole, Type QPH plug-in circuit breaker rated for 240VAC, with an interrupting capacity of 22kA at 240VAC. Its plug-in configuration makes it a practical choice for compatible electrical distribution equipment, while the three-pole design provides simultaneous protection across three poles. The breaker is also HACR-rated and rated at 40°C, making it suitable for qualifying heating, air-conditioning, and refrigeration applications where these specifications are required. Measuring approximately 3.13 inches high, 3.00 inches wide, and 2.56 inches deep, the Q340H packs the required circuit protection into a compact footprint. Whether you're replacing an existing breaker or matching a breaker to specified electrical equipment, the key is compatibility; confirm the Q340H part number, QPH type, amperage, voltage, pole count, interrupting rating, and mounting style before installation.

Key Features and Benefits

• 40-amp rating designed to provide overcurrent protection for applications requiring a 40A circuit breaker.
• Provides coordinated protection across three poles in compatible electrical systems.
• 22kA AIC at 240VAC offers a 22,000-amp interrupting capacity, an important consideration when matching a breaker to the system's available fault-current requirements.
• Built for applications requiring a breaker rated for operation at 240 volts AC.
• Clearly identified as part of the QPH breaker family, helping simplify specification and replacement matching.
• Plug-in configuration designed for convenient installation into compatible electrical distribution equipment.
• HACR-rated, suitable for qualifying heating, air-conditioning, and refrigeration applications when the electrical system calls for an HACR-rated breaker.
• The breaker's amperage rating is specified at a 40°C ambient temperature.
• Measuring just 3.13" H x 3.00" W x 2.56" D, the Q340H provides three-pole protection in a compact package.

Technical Specifications

• Part Number: Q340H
  
• Type: QPH
  
• Amperage: 40 Amps
  
• Poles: 3
  
• Voltage: 240VAC
  
• A.I.C. Rating: 22kA @ 240VAC
  
• Mounting Style: Plug-In
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 3.13 in.
  • Width: 3.00 in.
  • Depth: 2.56 in.

Material Compliance and Certifications

• The Q340H is part of a circuit breaker family associated with recognized electrical safety standards, including UL 489 and CSA C22.2 No. 5. The breaker family is also HACR-rated, and available product documentation identifies the Q340H as REACH-compliant.
  Because circuit breakers are safety-critical electrical components, specifications should always be verified before installation. Check the exact part number, breaker type, amperage, number of poles, voltage, AIC rating, mounting configuration, panel compatibility, and applicable electrical requirements. Installation and servicing should be handled by qualified electrical personnel.

Where It Works Best

• The Q340H 40 amp 3-pole circuit breaker is a strong fit when your electrical equipment specifically calls for a QPH plug-in breaker with a 40A rating, three poles, 240VAC rating, and 22kA interrupting capacity. It can also serve qualifying HVAC and refrigeration applications where an HACR-rated breaker with these electrical characteristics is specified.