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Siemens / Murray MP240GF GFCI Miniature Circuit Breaker
- 40A
- 2 Pole
- Plug-On
Siemens / Murray
MP240GF
GFCI Miniature Circuit Breaker
Brand
Siemens / Murray
SKU
MP240GF
Quantity
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Siemens / Murray MP240GF - 40A GFCI Miniature Circuit Breaker
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Siemens / Murray MP240GF - 40A GFCI Miniature Circuit Breaker
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| Brand | Siemens / Murray |
|---|---|
| Part Number | MP240GF |
| Series | MP |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | MP |
|---|---|
| Terminal Type | Box 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 | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Special Classification | GFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral |
| Standards | CSA C22.2, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
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Siemens / Murray MP240GF - 40A GFCI Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens / Murray |
|---|---|
| Part Number | MP240GF-R |
| Series | MP |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | MP |
|---|---|
| Terminal Type | Box 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 | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Special Classification | GFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral |
| Standards | CSA C22.2, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
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Description
A drop-in replacement for older Murray and Siemens load centers, the MP240GF delivers reliable 5mA Class A ground-fault protection. This 2-pole, 40-amp plug-on breaker features a pigtail neutral connection and is rated for 10kAIC at 120/240VAC. Built to meet strict NEC requirements for wet and damp locations, it ensures personnel safety by detecting dangerous ground faults. Note that this is a legacy component; for new installations or modern upgrades, the QF240A is the recommended substitute.Specifications
| Brand | Siemens / Murray |
|---|---|
| Part Number | MP240GF-R |
| Series | MP |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | MP |
|---|---|
| Terminal Type | Box 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 | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Special Classification | GFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral |
| Standards | CSA C22.2, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
6 answersCan I use the Murray MP240GF in a modern Siemens load center?
Yes. Siemens acquired Murray, and Siemens load centers that accept QP-type breakers will accept MP-type breakers like the MP240GF. Siemens has issued a substitution letter confirming this interchangeability.
What is the modern Siemens equivalent for the Murray MP240GF?
The Siemens QF240A is the recommended modern substitute for the legacy Murray MP240GF. Both are 40A, 2-pole, Class A GFCI breakers with a pigtail neutral.
Does the MP240GF provide Class A ground-fault protection?
Yes. The MP240GF is a Class A GFCI breaker. It is designed to trip when a ground fault of 5mA is detected, ensuring personnel safety in wet or damp locations as required by the NEC.
How is the pigtail neutral wired on the MP240GF?
The coiled white pigtail wire must be connected directly to the neutral bus bar in the load center. The load neutral wire from the branch circuit connects to the designated neutral lug on the breaker.
Can the MP240GF be installed in a plug-on neutral panel?
The MP240GF features a pigtail neutral and does not utilize plug-on neutral (PON) connections. It can be installed in a PON panel only if wired conventionally to the standard neutral bus bar.
Can the MP240GF be used for a standard 120V single-pole circuit?
No. The MP240GF is a 2-pole breaker designed for 120/240VAC applications. It requires two panel spaces and is intended for 240V loads or multi-wire branch circuits that require ground-fault protection.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
Total 5 star reviews: 4 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
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!