Siemens MP220240CT2 20/40A Quadplex Miniature Circuit Breaker
- 20/40A
- 4 Pole
- Plug-On
Quantity
Siemens MP220240CT2 - 20/40A Quadplex Miniature Circuit Breaker
New
Quantity
Description
A practical solution for crowded panels, the MP220240CT2 quadplex breaker houses a 40A inner 2-pole circuit and a 20A outer 2-pole circuit in a standard two-pole space. Both circuits feature independent common trip mechanisms to ensure reliable multi-phase disconnects during overcurrent events. This plug-on unit fits legacy Murray load centers and is officially replaced by the Siemens Q22040CT2. It provides 10 kAIC interrupting capacity at 120/240V and carries HACR and SWD ratings.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MP220240CT2 |
| Series | MP |
| Amperage | 20/40A |
| 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 |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) / 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 8 AWG (Cu), 8 AWG (Al) / 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) / 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 |
| Accessories | Common Trip (Factory Configured) |
| Standards | CSA C22.2, HACR, SWD, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
6 answersWhat load centers are compatible with the MP220240CT2 quad breaker?
This plug-in circuit breaker is designed for use in legacy Murray load centers that accept MP frame breakers.
What is the modern Siemens replacement for the Murray MP220240CT2?
The modern Siemens cross-reference substitute for this breaker is the Q24020CT2.
What does the CT2 suffix mean on this Siemens quad breaker?
The CT2 suffix indicates that both the inner and outer circuits feature a common trip mechanism. Both poles of each respective circuit will trip simultaneously if a fault occurs.
How many panel spaces does the MP220240CT2 require?
This quadplex breaker provides four poles of protection but only requires two standard 1-inch panel spaces, maximizing panel density.
What wire sizes are accepted by the terminals on this breaker?
The terminals accept 14 to 8 AWG copper or 12 to 8 AWG aluminum wire for the 20A circuit, and 8 to 6 AWG copper or 8 to 4 AWG aluminum wire for the 40A circuit.
Do the 20A and 40A circuits trip together on this quadplex breaker?
No, the 20A and 40A circuits operate independently of each other. However, each individual 2-pole circuit features an internal common trip for its respective poles.
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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!