M-Frame
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M-Frame (300–800 Amperes) | |
Product Description
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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
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- | -------------------- | |
300 | MDL2300 | MDL3300 |
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350 | MDL2350 |
MDL3350 |
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400 | MDL2400 |
MDL3400 |
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450 | MDL2450 |
MDL3450 |
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500 | MDL2500 |
MDL3500 |
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600 | MDL2600 |
MDL3600 |
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700 | MDL2700 |
MDL3700 |
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800 | MDL2800 |
MDL3800 |
Types MDLB Thermal-Magnetic Circuit Breakers with Non-Interchangeable Trip Units
(300–800 Amperes)
(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)
(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)
(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
MD Frame, Two and Three Pole