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Siemens MBKED3125 Main Breaker Kit

Siemens MBKED3125
Main Breaker Kit
Brand Siemens
SKU MBKED3125
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Core Specs

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Amperage125A
SeriesMBK
Poles3
Mounting StyleBolt-On
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Siemens MBKED3125 - 125A 3 Pole Main Breaker Kit

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$1,294.24 Check Stock

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Description Specifications SuperClub Warranties Shipping Reviews 4.9 (9)

Description

Providing a complete primary protection solution, this 125A kit is specifically built for commercial and industrial applications. It features a 65kA interrupting rating at 240VAC to handle substantial fault currents safely. Designed to install into Siemens P1 panelboards, the package contains everything needed for setup. The assembly includes an ED43B125 thermal-magnetic breaker, mounting brackets, and straps. With its HACR rating and LI protection, this unit ensures reliable performance.

Specifications

Key specifications
Brand Siemens
Part Number MBKED3125
Series MBK
Amperage 125A
Poles 3
Mounting Style Bolt-On
Voltage 240VAC, 480VAC, 600Y/347VAC
Phase 3
AIC Rating 65kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600Y/347VAC
Fit and installation
Terminal Type Lugs
For Use With Siemens P1 Panelboards
Wire Gauge 3 AWG - 3/0 AWG (Cu), 1 AWG - 2/0 AWG (Al)
Max Wire 3/0 AWG (Cu), 2/0 AWG (Al)
Min Wire 3 AWG (Cu), 1 AWG (Al)
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed
Standards and features
Available Options Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release
Accessories Mounting Hardware, ED43B125 Circuit Breaker
Standards UL 489, CSA C22.2, HACR Rated
Approval CSA, UL
Temp Rating 40C
Construction Features Main Breaker, HACR Rated

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Free Shipping Policy

Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.

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We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.

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Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.

International Shipping

All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.

Reviews

4.9
Rated 4.9 out of 5 stars
Based on 9 reviews
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9 reviews
  • RR
    Richard R.
    Verified Buyer
    Reviewing
    Siemens MBK175A - 175A 2 Pole Main Breaker Kit
    I recommend this product
    Rated 5 out of 5 stars
    10/16/26
    Main breaker replacement

    I was in a real in real bind. I needed a main breaker in a size that everyone told me wasn’t available anymore . Mike at Super Breakers proved them wrong. They not only had the breaker in stock but I had it the next day.

    Thank you

    Richard Reeves

    Reeves Electric Inc

    Was this helpful?
  • ME
    michael e.
    Verified Buyer
    Reviewing
    Siemens MBK150 - 150A 2 Pole Main Breaker Kit
    I recommend this product
    Rated 5 out of 5 stars
    9/28/26
    Excellent 👍

    Came quickly, in great condition, worked perfectly

    Was this helpful?
  • RN
    Roderick N.
    Verified Buyer
    Reviewing
    Siemens MBK200 2 Pole Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    7/29/25
    Exact replacement!

    Exact replacement 👍

    Was this helpful?
  • WK
    William K.
    Verified Buyer
    Reviewing
    Siemens MBK175A - 175A 2 Pole Main Breaker Kit
    I recommend this product
    Rated 5 out of 5 stars
    7/29/25
    Works perfey

    Brand new, just as described. This was an odd amperage amount to stock, I'm glad they had this.

    Was this helpful?
  • MB
    Mike B.
    Flag of United States
    Reviewing
    Siemens MBK200A - 200A 2 Pole Main Breaker Kit
    I recommend this product
    Rated 5 out of 5 stars
    3/11/21
    Classy Breaker

    Brand new item, came packaged well. Quick deliverly

    Was this helpful?