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M-Frame

M-Frame (300–800 Amperes)
   Product Description
  • All Eaton M-Frame circuit breakers are HACR rated
  • MDL-Frame circuit breakers are available as individual components (frame, trip unit, terminals), or factory assembled complete breakers
  • MDLB, HMDLB-Frame circuit breakers with noninterchangeable trip units are suitable for reverse feed use
  • Learn more
M-Frame Circuit Breaker (Eaton, Cutler-Hammer, Westinghouse Series C®)
  

Types MDL Thermal-Magnetic Circuit Breakers with Interchangeable Trip Units
(300–800 Amperes)

 
Maximum
Continuous
Ampere Rating
@40°C
 -
Two Pole
600VAC Maximum
50kAIC @480VAC
 -
Three Pole
600VAC Maximum
50kAIC @480VAC
 - --------------------
               
  300   MDL2300   MDL3300
    
  350   MDL2350
   MDL3350
    
  400   MDL2400
   MDL3400
    
  450   MDL2450
   MDL3450
    
  500   MDL2500
   MDL3500
    
  600   MDL2600
   MDL3600
    
  700   MDL2700
   MDL3700
    
  800   MDL2800
   MDL3800
    
 
Types MDLB Thermal-Magnetic Circuit Breakers with Non-Interchangeable Trip Units
(300–800 Amperes)


Maximum
Continuous
Ampere Rating
@40°C
-
Two Pole
600VAC Maximum
50kAIC @480VAC
-
Three Pole
600VAC Maximum
50kAIC @480VAC 
-
 --------------------
               
  300    MDLB2300    MDLB3300     
  350    MDLB2350     MDLB3350     
  400    MDLB2400     MDLB3400     
  450   MDLB2450     MDLB3450     
  500    MDLB2500     MDLB3500     
  600    MDLB2600   MDLB3600     
  700    MDLB2700     MDLB3700     
  800    MDLB2800     MDLB3800     

 
 

Types HMDL Thermal-Magnetic Circuit Breakers with Interchangeable Trip Units
(300–800 Amperes)

Maximum
Continuous
Ampere Rating
@40°C
-
Two Pole
600VAC Maximum
65kAIC @480VAC
-
Three Pole
600VAC Maximum
65kAIC @480VAC
-
 --------------------
               
  300   HMDL2300   HMDL3300    
  350   HMDL2350   HMDL3350    
  400   HMDL2400   HMDL3400    
  450   HMDL2450   HMDL3450    
  500   HMDL2500   HMDL3500    
  600   HMDL2600   HMDL3600    
  700   HMDL2700   HMDL3700    
  800   HMDL2800   HMDL3800    
 
 
 
Types HMDLB Thermal-Magnetic Circuit Breakers with Non-Interchangeable Trip Units
(300–800 Amperes)

Maximum
Continuous
Ampere Rating
@40°C
-
Two Pole
600VAC Maximum
65kAIC @480VAC
-
Three Pole
600VAC Maximum
65kAIC @480VAC
-
 --------------------
               
  300    HMDLB2300    HMDLB3300     
  350    HMDLB2350    HMDLB3350     
  400    HMDLB2400    HMDLB3400     
  450    HMDLB2450    HMDLB3450     
  500    HMDLB2500    HMDLB3500     
  600    HMDLB2600    HMDLB3600     
  700    HMDLB2700    HMDLB3700     
  800    HMDLB2800    HMDLB3800     




Dimensions
Approximate Dimensions in Inches (mm) 
  
MD Frame, Two and Three Pole