Eaton Molded Case Circuit Breaker Series-C, 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
Standards and Certifications
- CE marked
Types MDL and HMDL Thermal-Magnetic Circuit Breakers with Interchangeable Trip Units—Two-Pole
| Maximum Continuous Ampere Rating at 40°C |
Standard Interrupting Capacity 600 Vac Rated 50 kAIC at 480 Vac |
High Interrupting Capacity 600 Vac Rated 65 kAIC at 480 Vac |
Thermal-Magnetic Trip Unit Only For Use with Standard or High or Ultra High Interrupting Frames |
Standard Terminals Only(1) |
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| Factory Assembled Circuit Consisting of Frame, Trip Unit and Terminals |
Frame Only | Factory Assembled Circuit Consisting of Frame, Trip Unit and Terminals |
Frame Only | Magnetic Trip Range is 5–10 Up Through 600A; 4–8 on 700 and 800A x Continuous Ampere Rating |
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| 300 | MDL2300 | MDL2800F | HMDL2300 | HMDL2800F | MT2300T | TA700MA1 |
| 350 | MDL2350 | HMDL2350 | MT2350T | TA700MA1 | ||
| 400 | MDL2400 | HMDL2400 | MT2400T | TA700MA1 | ||
| 450 | MDL2450 | HMDL2450 | MT2450T | TA700MA1 | ||
| 500 | MDL2500 | HMDL2500 | MT2500T | TA700MA1 | ||
| 600 | MDL2600 | HMDL2600 | MT2600T | TA700MA1 | ||
| 700 | MDL2700 | HMDL2700 | MT2700T | TA700MA1 | ||
| 800 | MDL2800 | HMDL2800 | MT2800T | TA800MA2 | ||
Types MDL and HMDL Thermal-Magnetic Circuit Breakers with Interchangeable Trip Units—Three-Pole
| Maximum Continuous Ampere Rating at 40°C |
Standard Interrupting Capacity 600 Vac Rated 50 kAIC at 480 Vac |
High Interrupting Capacity 600 Vac Rated 65 kAIC at 480 Vac |
Thermal-Magnetic Trip Unit Only For Use with Standard or High or Ultra High Interrupting Frames |
Standard Terminals Only(1) |
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| Factory Assembled Circuit Consisting of Frame, Trip Unit and Terminals |
Frame Only | Factory Assembled Circuit Consisting of Frame, Trip Unit and Terminals |
Frame Only | Magnetic Trip Range is 5–10 Up Through 600A; 4–8 on 700 and 800A x Continuous Ampere Rating |
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| 300 | MDL3300 | MDL3800F | HMDL3300 | HMDL3800F | MT3300T | TA700MA1 |
| 350 | MDL3350 | HMDL3350 | MT3350T | TA700MA1 | ||
| 400 | MDL3400 | HMDL3400 | MT3400T | TA700MA1 | ||
| 450 | MDL3450 | HMDL3450 | MT3450T | TA700MA1 | ||
| 500 | MDL3500 | HMDL3500 | MT3500T | TA700MA1 | ||
| 600 | MDL3600 | HMDL3600 | MT3600T | TA700MA1 | ||
| 700 | MDL3700 | HMDL3700 | MT3700T | TA700MA1 | ||
| 800 | MDL3800 | HMDL3800 | MT3800T | TA800MA2 | ||
NOTES:
(1) Two terminals are required per pole.
Types MDLB and HMDLB Thermal-Magnetic Circuit Breakers with Non-Interchangeable Trip Units—Two-Pole(1)
| Maximum Continuous Ampere Rating at 40°C |
Standard Interrupting Capacity 600 Vac Rated 50 kAIC at 480 Vac Factory Assembled Circuit Consisting of Frame, Trip Unit and Terminals |
High Interrupting Capacity 600 Vac Rated 65 kAIC at 480 Vac Factory Assembled Circuit Consisting of Frame, Trip Unit and Terminals |
Standard Terminals Only(2) |
| 300 | MDLB2300 | HMDLB2300 | TA700MA1 |
| 350 | MDLB2350 | HMDLB2350 | TA700MA1 |
| 400 | MDLB2400 | HMDLB2400 | TA700MA1 |
| 450 | MDLB2450 | HMDLB2450 | TA700MA1 |
| 500 | MDLB2500 | HMDLB2500 | TA700MA1 |
| 600 | MDLB2600 | HMDLB2600 | TA700MA1 |
| 700 | MDLB2700 | HMDLB2700 | TA700MA1 |
| 800 | MDLB2800 | HMDLB2800 | TA800MA2 |
Types MDLB and HMDLB Thermal-Magnetic Circuit Breakers with Non-Interchangeable Trip Units—Three-Pole(1)
| Maximum Continuous Ampere Rating at 40°C |
Standard Interrupting Capacity 600 Vac Rated 50 kAIC at 480 Vac Factory Assembled Circuit Consisting of Frame, Trip Unit and Terminals |
High Interrupting Capacity 600 Vac Rated 65 kAIC at 480 Vac Factory Assembled Circuit Consisting of Frame, Trip Unit and Terminals |
Standard Terminals Only(2) |
| 300 | MDLB3300 | HMDLB3300 | TA700MA1 |
| 350 | MDLB3350 | HMDLB3350 | TA700MA1 |
| 400 | MDLB3400 | HMDLB3400 | TA700MA1 |
| 450 | MDLB3450 | HMDLB3450 | TA700MA1 |
| 500 | MDLB3500 | HMDLB3500 | TA700MA1 |
| 600 | MDLB3600 | HMDLB3600 | TA700MA1 |
| 700 | MDLB3700 | HMDLB3700 | TA700MA1 |
| 800 | MDLB3800 | HMDLB3800 | TA800MA2 |
NOTES:
(1) Factory sealed for reverse feed application.
(2) Two terminals are required per pole.
Types MDL and HMDL Electronic Circuit Breakers with Interchangeable Trip Units—Three-Pole
| Maximum Continuous Ampere Rating at 40°C(1) |
Circuit Breaker Frame Only | Digitrip RMS 310 Trip Unit Only | Digitrip RMS 310 Rating Plug Only | |||
| Standard Interrupting Capacity 600 Vac Rated 50 kAIC at 480 Vac |
High Interrupting Capacity 600 Vac Rated 65 kAIC at 480 Vac |
L – Adjustable Long Delay Pickup (by
Adjustable Rating Plug) S – Adjustable Short Delay Pickup with Fixed Short Delay Time (I2t Response) or Adjustable Short Delay Time (Flat Response) I – Adjustable Instantaneous Pickup by Setting Short Delay Time to Instantaneous G – Adjustable Ground Fault Pickup with Adjustable Ground Fault Delay (Flat Response) |
Ampere Rating |
Fixed Rating Plug |
Ampere Rating | |
| 800 | MDL3800F | HMDL3800F | MES3800LS | 400 | 8MES400T | 400/500/600/800 A8MES800T |
| MES3800LSI | 500 | 8MES500T | ||||
| MES3800LSG | 600 | 8MES600T | 620/640/660/680 A8MES600T5 |
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| MES3800LSIG | 700 | 8MES700T | ||||
| — | 800 | 8MES800T | 720/740/760/780 A8MES700T5 |
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Types MDLB and HMDLB Electronic Circuit Breakers with Non-Interchangeable Trip Units(3)
| Maximum Continuous Ampere Rating at 40°C(1) |
Factory-Assembled Circuit Breaker Consisting of Frame and Trip Unit | |||
| LS | LSI | LSG | LSIG | |
| Three-Pole Standard Interrupting Capacity 600 Vac Rated 50 kAIC at 480 Vac | ||||
| 800 | MDLB3800T33W | MDLB3800T32W | MDLB3800T35W | MDLB3800T36W |
| Three-Pole High Interrupting Capacity 600 Vac Rated 65 kAIC at 480 Vac | ||||
| 800 | HMDLB3800T33W | HMDLB3800T32W | HMDLB3800T35W | HMDLB3800T36W |
NOTES:
(1) Ampere rating is established by rating plug.
(2) For AC use only.
(3) Factory sealed, suitable for reverse feed application. CMDLB and CHMDLB are also available.
100% Rated Types CMDL and CHMDL Electronic Circuit Breakers with Interchangeable Trip Units—Three-Pole
The NEC allows the breaker to be rated at 100% of its frame size in an assembly, provided that 90°C wire is applied at the 75°C ampacity. All 100% rated circuit breakers have electronic trip units. Order as individual components: breaker frame, trip unit, rating plug and terminals.
| Maximum Continuous Ampere Rating at 40°C(1) |
Circuit Breaker Frame Only | Digitrip RMS 310 Trip Unit Only | Digitrip RMS 310 Trip Unit Only | ||||||
| Standard Interrupting Capacity 50 kAIC at 480 Vac |
High Interrupting Capacity 65 kAIC at 480 Vac |
Standard Adjustable Short Time Pickup with I2t Short Delay Ramp |
Options Independently Adjustable Short Time Pickup and Delay Ground Fault Protection |
Adjustable Short Time Pickup with I2t Short Delay and Ground Fault Protection |
Independently Adjustable Short Time Pickup and Ground Fault Protection |
Ampere Rating |
Ampere Rating |
Adjustable Rating Plug Ampere Rating |
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| 800 | CMDL3800F | CHMDL3800F | MES3800LS | MES3800LSI | MES3800LSG | MES3800LSIG | 400 | 8MES400T | 400/500/600/800 A8MES800T |
| 500 | 8MES500T | ||||||||
| 600 | 8MES600T | 620/640/660/680 A8MES600T5 |
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| 700 | 8MES700T | ||||||||
| 800 | 8MES800T | 720/740/760/780 A8MES700T5 |
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Molded Case Switches
Eaton’s molded case switches are used as compact switches in applications requiring high current switching capabilities. Molded case switches are constructed of circuit breaker components and are of the high instantaneous automatic type. Molded case switchesare listed in accordance with Underwriters Laboratories Standard UL 489.
| Maximum Continuous Ampere Rating at 40°C |
600 Vac Maximum, 250 Vdc Circuit Breaker Only without Line and Load Terminals |
| Two-Pole | |
| 800 | MDL2800WK |
| MDLB2800WK(3) | |
| HMDLB2800WK | |
| Three-Pole | |
| 800 | MDL3800WK |
| MDLB3800WK(3) | |
| HMDL3800WK | |
NOTES:
(1) Ampere rating is established by rating plug.
(2) For AC use only.
(3) MDLB and HMDLB are suitable for reverse feed applications.
Molded case switch may trip above 6000 amperes.
Accessories Selection Guide and Ordering Information
Line and Load Terminals
M-Frame circuit breakers use Cu/AI terminals as standard. When optional copper or Cu/ AI terminals are required, order by catalog number. Specify if factory installation is required.
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| TA700MA1 | TA800MA2 | TA801MA |
Line and Load Terminals
| Maximum Breaker Amperes |
Terminal Body Material |
Wire Type |
AWG Wire Range/No. Conductors |
Terminal | Terminals with Control Wire Termination |
| Standard Cu/AI Pressure Terminals | |||||
| 700 | Aluminum | Cu/AI | 1–500 kcmil (2) | TA700MA1 | TA700MA1CWT |
| 800 std. | Aluminum | Cu/AI | 3/0–400 kcmil (3) | TA800MA2 | TA800MA2CWT |
| 800 | Aluminum | Cu/AI | 500–750 kcmil (2) | TA801MA | TA801MACWT |
| Optional Copper and Cu/AI Pressure Type Terminals | |||||
| 600 | Copper | Cu | 2/0–500 kcmil (2) | T600MA1 | — |
| 800 | Copper | Cu | 3/0–300 kcmil (3) | T800MA1 | — |