FLB Series Explosionproof Circuit Breakers


FLB Circuit Breakers are used:

  • For service entrance, feeder or branch circuit protection for lighting, heating, appliance and motor circuits
  • To provide disconnect means, short circuit protection and thermal time delay overload protection
  • Indoors or outdoors at petroleum refineries, chemical and petrochemical plants and other process industry facilities where similar hazards exist
Frame Sizes 100 or 225A
Number of Poles 1; 2; 3
Enclosure Hub Sizes 3/4"; 1"; 1 1/2"; 1 1/4"; 2 1/2"; 3"
Circuit Breaker Amperages 15; 20; 30; 40; 50; 70; 90; 100; 125; 150; 175; 200; 225A
Body, Cover, and Operating Handle Material Copper-free aluminum
Operating Shaft Material Stainless steel
Interior Parts Material Sheet steel
Available Options Lugs for neutral connections; breather/drains; auxiliary switches


  • Semi-cylindrical body shape for maximum strength at lowest practical weight
  • Round threaded covers at each end, set at an angle to provide ready access to interior for ease of wiring
  • Breaker is operated by an external handle which can be padlocked in either "ON" or "OFF" positions; breaker is trip-free of the handle and will open under short circuit or overload even if the handle is locked in the "ON" position
  • Bodies have vertical through feed conduit hubs of sizes given in the listings