Built for circuit protection, the Siemens MBK200 is a 2-pole main breaker kit rated for 200A and 120/240VAC. It has an interrupting rating of 22kA at 240VAC and a single-phase configuration. The breaker uses plug-on mounting and has a depth of 3.18 in. Its thermal magnetic trip provides long-time and instantaneous protection (LI) against overloads and short circuits.
How should I use the Siemens MBK200's 200A rating when selecting it?
The 200A rating is the breaker's rated current, not its fault-interrupting capacity. Use it when coordinating circuit load, conductor ampacity and overcurrent protection requirements.
How does the 22kA interrupting rating affect breaker selection?
The MBK200 has a 22kA interrupting rating at 240VAC. Compare that rating with the available fault current at the installation point; the available fault current must not exceed the applicable interrupting rating.
What circuit arrangement should I select the MBK200 for?
The MBK200 is a 2-pole, single-phase breaker rated 120/240VAC. Use those characteristics to select it for the circuit's voltage, phase arrangement and required number of protected poles.
What protection does the thermal-magnetic LI trip provide?
The thermal-magnetic trip combines delayed thermal response to sustained overloads with instantaneous magnetic response to short-circuit current. LI means long-time and instantaneous protection, guiding selection where those two protective functions are required.
How much depth should I account for when planning the installation?
The MBK200 has a depth of 3.18 in. Account for that dimension when checking installation space, along with the clearances required for the installation.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 9 reviews.
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
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
RN
Roderick N.
Verified Buyer
Reviewing
Siemens MBK200 - 200A 2 Pole Main Breaker Kit
I recommend this product
Rated 5 out of 5 stars
7/29/25
Exact replacement!
Exact replacement 👍
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.
MB
Mike B.
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