Siemens MP230240CT2 30/40A Quadplex Miniature Circuit Breaker
- 30/40A
- 4 Pole
- Plug-On
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Siemens MP230240CT2 - 30/40A Quadplex Miniature Circuit Breaker
New
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Description
Maximizing panel capacity, the MP230240CT2 delivers two separate 240V circuits within a compact two-space footprint. It features a 40A inner and 30A outer common trip configuration. Designed for plug-on installation, this quadplex unit mounts into legacy Murray and current Siemens load centers. It serves as an exact match for older systems and is officially replaced by the Q23040CT2. With a 10kAIC rating and HACR certification, it safely handles heavy-duty HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MP230240CT2 |
| Series | MP |
| Amperage | 30/40A |
| Poles | 4 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | MP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Murray Load Centers, Siemens Load Centers |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Special Classification | Quadplex |
|---|---|
| Available Options | Padlock Attachment |
| Standards | HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
6 answersCan I use the MP230240CT2 to replace an older Murray quad breaker?
Yes, this breaker is designed for use in Murray load centers. Siemens acquired Murray, and this MP-T series breaker is the direct replacement for legacy Murray MH-T quadplex breakers with the same amp ratings.
What is the Siemens equivalent to the MP230240CT2?
The direct Siemens equivalent is catalog number Q23040CT2. Both are manufactured by Siemens and share identical internal components, but the Q23040CT2 is UL listed specifically for Siemens panels under the QT frame type.
How much panel space does this quadplex breaker require?
It requires two standard 1-inch spaces. The quadplex design allows you to fit two independent 2-pole circuits into the physical space normally occupied by a single 2-pole breaker, maximizing panel density.
What does the CT2 suffix mean on this breaker?
The CT2 suffix indicates that both the inner and outer circuits feature an internal common trip. If a fault occurs on one leg of either the 30A or 40A circuit, both legs of that specific circuit will trip simultaneously to prevent a partial power condition on 240V loads.
Does this breaker have a rejection clip?
Yes, this is a Class CTL (Circuit Total Limiting) breaker and features a rejection clip. It can only be installed in load center slots specifically notched to accept tandem or quadplex breakers.
Can I install this Murray MP-T breaker in a Siemens load center?
While Siemens manufactures both brands, you must check your specific Siemens load center wiring diagram. Many Siemens panels list Murray MP-T breakers as acceptable, but if your panel only lists Siemens Type QT, you should use the Q23040CT2 instead to maintain UL compliance.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
- JVJulie V.Verified BuyerReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/5/26on breaker
so far so good on the refurbished breaker
- JFJon F.ReviewingSiemens / Murray MP250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/17/20Sales
Fantastic group to work with...
- DSDavid S.ReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars1/5/20Thank you so much for
Thank you so much for sending me a 100 amp breaker that was in the condition that you said it would be in.With out your breaker I would still be in the dark Thank you David
- RARichard A.ReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/13/19Awesome!
Your prices and number of available items to choose from is Awesome!