Siemens / Murray MP220240 20/40A Quadplex Miniature Circuit Breaker
- 20/40A
- 4 Pole
- Plug-On
Quantity
Siemens / Murray MP220240 - 20/40A Quadplex Miniature Circuit Breaker
New
Quantity
Description
Built for residential applications, the Siemens Murray MP220240 quadplex breaker maximizes panel density. It combines two independent 20A circuits and one 40A common-trip circuit into a compact two-space footprint. This plug-on breaker mounts into legacy Murray and Siemens load centers without adapters, serving as an exact replacement. It is cross-referenced to the modern Q24020CT2 substitute. Rated at 10kAIC at 120/240VAC, this thermal-magnetic breaker is HACR rated for HVAC use.Specifications
| Brand | Siemens / Murray |
|---|---|
| Part Number | MP220240 |
| Series | MP |
| Amperage | 20/40A |
| Poles | 4 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Murray Load Centers, Siemens Load Centers |
| Wire Gauge | Outer (20A): 14-8 AWG (Cu), 12-8 AWG (Al); Inner (40A): 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | Outer: 8 AWG; Inner: 4 AWG (Al) / 6 AWG (Cu) |
| Min Wire | Outer: 14 AWG; Inner: 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 | CSA C22.2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip (Inner Poles), Independent Trip (Outer Poles), HACR Rated |
Product FAQs
7 answersCan I install the Murray MP220240 in a Siemens load center?
Yes. Siemens acquired Murray and issued a UL substitution letter allowing Murray breakers to be used in Siemens load centers. The MP220240 can be installed in Siemens panels that accept Type MH-T or QT quadplex breakers.
What is the modern Siemens equivalent for the MP220240 quad breaker?
The direct Siemens replacement is the Q22040CT2 quadplex circuit breaker. It provides the exact same 20A outer and 40A inner pole configuration and mounts into the same load centers.
How much panel space does the MP220240 require?
This quadplex breaker requires two standard 1-inch panel spaces. It maximizes panel density by combining two independent 20A single-pole circuits and one 40A double-pole circuit into a compact footprint.
Is the MP220240 a CTL or non-CTL breaker?
The MP220240 is a CTL (Circuit Total Limiting) breaker. It features a rejection clip and can only be installed in load center slots specifically notched to accept tandem or quadplex breakers.
Is this breaker suitable for HVAC equipment?
Yes, the MP220240 is HACR rated. It is approved for use with heating, air conditioning, and refrigeration equipment, provided the equipment requires a 20A or 40A thermal-magnetic breaker.
What are the wire size requirements for the inner and outer poles?
Because of the different amperage ratings, the wire requirements vary. The outer 20A poles accept 14 to 8 AWG copper or 12 to 8 AWG aluminum wire. The inner 40A poles require heavier gauge wire, accepting 8 to 6 AWG copper or 8 to 4 AWG aluminum wire.
Does this quad breaker provide common-trip protection?
Yes, but only for the inner poles. The inner 40A poles feature an internal common trip for 240V applications. The outer 20A poles operate as independent single-pole circuits and do not share a common trip.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
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.
Same Day Shipping
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.
Expedited Shipments
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.
International Shipping
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 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!