Siemens MBK100M Main Breaker Kit
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Core Specs
See full specsSiemens MBK100M - 100A 2 Pole Main Breaker Kit
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Description
Built for residential service entrance applications, the Siemens MBK100M is a 100-amp, two-pole main breaker kit. It provides reliable thermal-magnetic protection and serves as the primary disconnect for the electrical panel. This plug-on unit is specifically designed to mount into Murray Rock Solid load centers. It is also recognized as a legacy replacement option, superseded by the MBK100A model for newer installations.Specifications
| Brand | Siemens |
|---|---|
| Series | MBK |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | MBK |
|---|---|
| Terminal Type | Lugs |
| For Use With | Murray Rock Solid 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 Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Mounting Hardware, Breaker, Lugs Included |
| Standards | UL 489, CSA C22.2 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Main Breaker Kit, 22kA Interrupt Rating |
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 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