QR23B175 - 175 Amp Circuit Breaker

QR23B175 - 175 Amp Circuit Breaker

Seeking a dependable 175A breaker for demanding applications? The QR23B175 from Siemens is engineered for stability under load, delivering reliable protection across three poles at 240 V AC. As part of the Siemens QR2 family, this unit inherits a design trusted by electricians and contractors. At just 7.0 inches tall and weighing approximately 4.5 pounds, it’s compact yet capable, and comes with load-side lugs installed to simplify wiring. With an HACR rating, it’s cleared for HVAC use along with standard electrical circuits — so you don’t need two separate breakers for heating and cooling systems.

Key Features and Benefits

• Supports 175 amps across three poles: suitable for balanced three-phase or multi-leg loads.
• 10 kA interrupting rating at 240 VAC: Ensures protection under fault conditions.
• HACR rating: Safe for HVAC, refrigeration, and general power circuits.
• Load-side lugs included: Wired straight out of the box without needing extra accessories.
• Slim, efficient footprint: (≈ 7.0 in height) yet durable molded-case construction.
• Push-to-trip testing capability: For field verification.

Technical Specifications

• Part Number: QR23B175
  
• Family / Frame: QR2 (molded case)
  
• Amperage: 175 A
  
• Poles: 3
  
• Voltage Rating: 240 VAC, 50/60 Hz
  
• Interrupting Capacity: 10 kA @ 240 VAC
  
• Mounting / Connection: Bolt-on panel / mechanical lugs
  
• Conductor Range: 2/0 AWG – 300 kcmil (Cu/Al)
  
• Ambient Rating: 40 °C
  
• Dimensions (H × W × D):
  • Height: 7.0 in
  • Width: 4.5 in
  • Depth: ~3.39 in
• Weight: ~4.5 lb (≈ 2.04 kg)
  
• Standards & Certs: UL 489 / CSA C22.2 / NOM-003
  

Material Compliance and Certifications

• This breaker is fully certified to UL 489, CSA C22.2, and NOM-003 standards, ensuring safe operation in North American and compatible markets.
• Its molded case is resistant to mechanical stress while providing insulation and longevity in real-world installations.
• The internal thermal-magnetic trip mechanism is designed for repeatability and consistency across the breaker’s service life.

Where It Works Best

• The QR23B175 shines in commercial panels, light industrial setups, and residential systems that demand a reliable 175 A trip unit. Its HACR rating makes it ideal for HVAC systems, chillers, refrigeration circuits, or any mixed electrical/HVAC installation. Use it in service disconnects, main feeders, or sub-panel protection where a three-pole, 240V breaker is required. Its compact form factor makes it a strong choice when space is at a premium, yet you still need complete rated protection.