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Siemens MBK100A Main Breaker Kit
Siemens
MBK100A
Main Breaker Kit
Brand
Siemens
SKU
MBK100A
Quantity
Core Specs
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Siemens MBK100A - 100A 2 Pole Main Breaker Kit
New
Quantity
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Description
Serving as a dedicated 100A main breaker conversion kit, the Siemens MBK100A delivers reliable power distribution for residential applications. This two-pole unit provides essential thermal-magnetic overcurrent protection. It mounts into Siemens Ultimate series load centers, allowing users to convert main lug panels or replace existing breakers. As an exact upgrade, this model replaces the older MBK100 kit. Rated for 22kAIC at 120/240VAC, it accepts 4 AWG to 3/0 AWG copper or aluminum wiring.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MBK100A |
| Series | MBK |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | MBK |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Ultimate Load Centers |
| Wire Gauge | 4 AWG - 3/0 AWG (Cu/Al) |
| Max Wire | 3/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch |
|---|---|
| Accessories | Mounting Hardware |
| Standards | UL 489, CSA C22.2 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Main Breaker Kit, 22kA Interrupting Rating |
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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.
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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
Review summary
Customers rate this product 4.9 out of 5 based on 8 reviews.
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Rating
8 reviews
- MEmichael e.Verified BuyerReviewingSiemens MBK150 - 150A 2 Pole Main Breaker KitI recommend this productRated 5 out of 5 stars9/28/26Excellent 👍
Came quickly, in great condition, worked perfectly
- RNRoderick N.Verified BuyerReviewingSiemens MBK200 2 Pole Circuit BreakerI recommend this productRated 5 out of 5 stars7/29/25Exact replacement!
Exact replacement 👍
- WKWilliam K.Verified BuyerReviewingSiemens MBK175A - 175A 2 Pole Main Breaker KitI recommend this productRated 5 out of 5 stars7/29/25Works perfey
Brand new, just as described. This was an odd amperage amount to stock, I'm glad they had this.
- MBMike B.ReviewingSiemens MBK200A - 200A 2 Pole Main Breaker KitI recommend this productRated 5 out of 5 stars3/11/21Classy Breaker
Brand new item, came packaged well. Quick deliverly
- FBFrank B.ReviewingSiemens MBK200A - 200A 2 Pole Main Breaker KitI recommend this productRated 5 out of 5 stars2/7/19Great company would like to
Great company would like to see orders shipped more quickly