Skip to content
Free Economy Shipping Available! | Refer to FAQ For Additional Information | websales@breakerhunters.com | 877-963-4543
Free Economy Shipping Available! | Refer to FAQ For Additional Information | websales@breakerhunters.com | 877-963-4543

Westinghouse: MA Frame Circuit Breakers

M-Frame Circuit Breakers

  • HMAM3800 1500-3000 THERMAL-MAG W/ UVR M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 1000VAC @ 50/60HZ, Interrupting Ratings: 14 Kiloampere @ 1000VAC, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    HMAM3600 1500-3000 Thermal-Mag w/UVR

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 600 Ampere at 40 Degree Ce...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • HMAM3800 1500-3000 MAG-ONLY Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 1000VAC @ 50/60HZ, Interrupting Ratings: 14 Kiloampere @ 1000VAC, No Lugs Standard. 1 Year Warranty.

    HMAM3800 1500-3000 Mag-Only

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Magnetic Only Trip Unit, 800 Ampere at 40 Degree Celsius, 3...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • HMAM3800 1500-3000 MAG-ONLY W/ UVR M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Magnetic Only Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 1000VAC @ 50/60HZ, Interrupting Ratings: 14 Kiloampere @ 1000VAC, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    HMAM3800 1500-3000 Mag-Only w/UVR (2609D60G57)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Magnetic Only Trip Unit, 800 Ampere at 40 Degree Celsius, 3...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • HMAM3800 1500-3000 THERMAL-MAG M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 1000VAC @ 50/60HZ, Interrupting Ratings: 14 Kiloampere @ 1000VAC, No Lugs Standard. 1 Year Warranty.

    HMAM3800 1500-3000 Thermal-Mag

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 800 Ampere at 40 Degree Ce...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • HMAM3800 1500-3000 THERMAL-MAG W/ UVR M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 1000VAC @ 50/60HZ, Interrupting Ratings: 14 Kiloampere @ 1000VAC, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    HMAM3800 1500-3000 Thermal-Mag w/UVR

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 800 Ampere at 40 Degree Ce...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • HMAM3800 1500-3000 THERMAL-MAG W/ UVR M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 1000VAC @ 50/60HZ, Interrupting Ratings: 14 Kiloampere @ 1000VAC, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    HMAM3800 1500-3000 Thermal-Mag w/UVR & 1A/1B Aux

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 800 Ampere at 40 Degree Ce...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • HMAM3800 2000-4000 THERMAL-MAG W/ UVR M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 1000VAC @ 50/60HZ, Interrupting Ratings: 14 Kiloampere @ 1000VAC, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    HMAM3800 2000-4000 Thermal-Mag w/UVR

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal-Magnetic Only Trip Unit, 800 Ampere at 40 Degree Ce...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3600 1500-3000 MAG-ONLY M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Magnetic Only Trip Unit, 600 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, Interrupting Ratings: 42 Kiloampere @ 240VAC, 30 Kiloampere @ 480VAC, 22 Kiloampere @ 600VAC, No Lugs Standard. 1 Year Warranty.

    MAM3600 1500-3000 Mag-Only

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Magnetic Only Trip Unit, 600 Ampere at 40 Degree Celsius, 3...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3600 1500-3000 THERMAL-MAG (5685D48G72) M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 600 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, No Lugs Standard. 1 Year Warranty.

    MAM3600 1500-3000 Thermal-Mag (5685D48G72)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 600 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3600 1500-3000 THERMAL-MAG W/ UVR (2609D60G19) M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 600 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, 120v UVR installed, No Lugs Standard. 1 Year Warranty.
    Call for Price

    MAM3600 1500-3000 Thermal-Mag w/UVR (2609D60G19)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 600 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Call for Price
    Delivery
    Free with $500 Order
    Get it by
  • MAM3600 3000-6000 THERMAL-MAG M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 600 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, Interrupting Ratings: 42 Kiloampere @ 240VAC, 30 Kiloampere @ 480VAC, 22 Kiloampere @ 600VAC, No Lugs Standard. 1 Year Warranty.

    MAM3600 3000-6000 Thermal-Mag

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 600 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3600 3000-6000 THERMAL-MAG W/ UVR M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 600 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    MAM3600 3000-6000 Thermal-Mag w/UVR

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 600 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 1500-3000 MAG-ONLY (2609D60G46) M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, No Lugs Standard. 1 Year Warranty.

    MAM3800 1500-3000 Mag-Only (2609D60G46)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 1500-3000 MAG-ONLY W/ UVR (2609D60G47) M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    MAM3800 1500-3000 Mag-Only w/UVR (2609D60G47)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 1500-3000 THERMAL-MAG M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, No Lugs Standard. 1 Year Warranty.

    MAM3800 1500-3000 Thermal-Mag

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 1500-3000 THERMAL-MAG W/ UVR M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    MAM3800 1500-3000 Thermal-Mag w/UVR

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 2000-4000 MAG-ONLY (2609D60G48) M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, No Lugs Standard. 1 Year Warranty.

    MAM3800 2000-4000 Mag-Only (2609D60G48)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 2000-4000 MAG-ONLY W/ UVR (2609D60G49) M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    MAM3800 2000-4000 Mag-Only w/UVR (2609D60G49)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 2000-4000 THERMAL-MAG (5685D48G71) M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, No Lugs Standard. 1 Year Warranty.

    MAM3800 2000-4000 Thermal-Mag (5685D48G71)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 2000-4000 THERMAL-MAG W/ UVR & AUX M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, 120v UVR installed, 1A-1B Auxiliary Installed, No Lugs Standard. 1 Year Warranty.

    MAM3800 2000-4000 Thermal-Mag w/UVR & 2A-2B Auxiliary

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 2000-4000 THERMAL-MAG W/ UVR (2609D60G20) M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    MAM3800 2000-4000 Thermal-Mag w/UVR & Lugs (2609D60G20)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 2000-4000 THERMAL-MAG W/ UVR (2609D60G20) M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    MAM3800 2000-4000 Thermal-Mag w/UVR (2609D60G20)

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 3000-6000 MAG-ONLY M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, No Lugs Standard. 1 Year Warranty.

    MAM3800 3000-6000 Mag-Only

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by
  • MAM3800 3000-6000 MAG-ONLY W/ UVR M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius, 3 Pole, 600VAC @ 50/60HZ, 120v UVR installed, No Lugs Standard. 1 Year Warranty.

    MAM3800 3000-6000 Mag-Only w/UVR

    Westinghouse

    Product Description M Frame Style, Molded Case Mining Circuit Breaker, Interchangeable Thermal Magnetic Trip Unit, 800 Ampere at 40 Degree Celsius...

    View full details
    Delivery
    Free with $500 Order
    Get it by
    Delivery
    Free with $500 Order
    Get it by

Let customers speak for us

from 175 reviews

Always a pleasure buying from Breaker Hunters

Jeffrey Seeley
MXD63B800
Great Store

Took them awhile to find an OLD breaker for me but they did come up what I needed. Great service. Highly recommend.

Wayne Nelsen
Q20
Great!!!

My salesperson was very helpful and worked with me nicely to get the Breaker I need and out to me in a really quick fashion. Thanks again!!

John Thyen
NCG31200F w/1000A Rating Plug
Great service

The service was excellent and very fast delivery, highly recommend.

Tim McGregor
W200M2CFC
Excelente Servicio

Muy cumplidores en sus despachos, los productos impecables Muchas Gracias

EximtecSpA att Marie Mayo
V201K5CJZ1

B10.2

Tom Vanderburg
B10.2
Fast and efficient

very fast and efficient

Tim McGregor
NDA Shipping
Great job

I ordered 9 starter switches and they were next day delivery. Installed and worked great. I am in the process of ordering spare ones now. Definitely recommend

Tim McGregor
W200M1CFC
STARTER REPLACEMENT

Had to replace an older starter. Communication with the company was easy and accurate. Customer service worked with me to ensure the order was correct and shipped on time. Highly recommend reaching out with any questions, great company.

ADAM JEFFREY
509-FOD

CHND312T33W

Jonathan Ragland
CHND312T33W

Great service, exactly what I ordered, thanks

Frank Roush
SEDA36AT0060 w/SRPE60A40

QUICK SERVICE, EXCELLENT PRODUCT. CUSTOMER IS VERY HAPPY !

Susan Sandridge
RD316T33WS21

Excellent service very happy with the product

Brent Hickman
LG3450S03

PAF361000

Cindy Miller
PAF361000

QUICK. SMOOTH. AND EASY. THANK YOU

Nationwide Electric Supply Co., Inc.
CHND312T33W