Circuit Breakers Overview

Circuit Breakers

Our extensive P&B circuit breaker product line includes thermal and magnetic types. Termed secondary breakers by UL, they protect equipment rather than branch circuits in buildings. One- to four-pole models are available in current ratings from milliamps through 50 amps.

Thermal Circuit Breakers   
Due to their relatively low cost, thermal breakers are applied more broadly than magnetic breakers. Thermal applications include:

• Line Conditioning
• Treadmills
• HVAC (Transformer)
• Appliance (Range Hood)
• Cable TV Converters
• Spa Controls
• Uninterruptible Power Supplies
• RVs (HVAC system)
• Appliance (Range)
• Test and Measurement
• Pool Heaters
• Bowling Pin Spotters
• Copy Machines
• Vending Machines
• General Aviation Aircraft
• Medical Equipment

• Medical/Dental Diagnostic Equipment
• Automation Robotics
• Welders
• Elevators

M9/W9 Series Standard Size Magnetic Circuit Breakers
(Approx. 0.75 x 2.5 x 2.1d [19 x 63.5 x 53.3d] per pole)  

M6/W6 Series Compact Size Magnetic Circuit Breakers
(Approx. 0.75 x 2.0 x 1.64d [19 x 50.8 x 41.7d] per pole)