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SmartPlug RV Power Inlet and Connector - 50 Amp - White

SmartPlug RV Power Inlet and Connector - 50 Amp - White

Item # SM46FR
Our Price: $266.05
RV Power Inlets
Shipping Weight: 2 lbs
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Easily replace your inlet and rewire your power cord for a SmartPlug connection that is both safer and easier to use. This package contains everything you need to upgrade your ride for a new generation of shore power connection. Great Prices for the best rv power inlets from SmartPlug. SmartPlug RV Power Inlet and Connector - 50 Amp - White part number SM46FR can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (120)
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  • Videos (1)
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SmartPlug RV Power Inlets - SM46FR

  • 50 Amp Male Plug
  • White
  • Power Inlets
  • SmartPlug
  • Square

Easily replace your inlet and rewire your power cord for a SmartPlug connection that is both safer and easier to use. This package contains everything you need to upgrade your ride for a new generation of shore power connection.


  • Inlet and connector upgrade your shore power setup to the SmartPlug system
    • 50-Amp Inlet replaces the existing socket on your boat or RV
    • 50-Amp connector lets you modify your favorite power cable
  • Straight-in, single-step operation means no more twisting or fiddling with locking rings
    • Plug shape takes guesswork out of connecting so it's simple to use, even in the dark
  • Multi-point locking system removes strain from connection points
    • Side levers snap with audible feedback and keep plug in place
    • Interior clamp bears weight of the cord to support wiring in the body
    • Inlet cap snaps down onto plug body when in use to hold cord in place and reduce strain
  • Integrated seals keep your equipment safe from the elements
    • Seals in plug face and around cord weatherproof your connection when in use
    • Inlet cap seal keeps out rain and debris when traveling
  • Flat electrical pins increase contact area compared to curved pins in twist locks
    • Reduces heat caused by electrical resistance
  • Blue LED light illuminates to indicate power is flowing
  • High-quality materials hold up to extreme climates or out on the water
    • Marine-grade stainless steel components hold up season after season
    • Nickel-plated brass electrical pins and tinned wires resist corrosion
    • Plastics are UV and heat resistant Valox 553U resins
  • Easy installation using included hardware and illustrated instructions
    • Inlet sized to fit standard flanges so you can use the same screws and holes
    • Cut the old twist lock style connector from your shore power cord to wire new plug
  • White color
  • Made in the USA


  • Amperage: 50 amps
  • Voltage: 125/250 volts
  • 7-Year warranty

SmartPlug vs. Twist Lock

RV and boat owners have long relied on Twist Lock style connections for powering their rides. For years, it has been the best option for connecting to shore power. It's been reliable, but most know it's not without disadvantages:

Twist-Type Design Problems

  • Curved pins make minimal surface contact, increasing the amount of heat generated
  • Locking ring can be prone to breaking, cross threading, and stripping out
  • Faulty locking ring puts strain on the connection
  • Wear and debris can loosen the fit, further decreasing surface contact
  • Circular plug shape isn't user friendly and takes some awareness of the orientation of the pins to insert correctly

SmartPlug's connector addresses each of these concerns and does all of the heavy lifting.

Locking arms grab the inlet, a clamp inside the plug body holds the cord, the inlet cap snaps to the top while in use, and the integrated seals weatherproof the connection. This helps prevent the wiggly, dirty connections that increase electrical resistance, which creates potentially dangerous heat.

Since it uses a square plug face, SmartPlug is able to use flat pins which create far more surface contact, further reducing the risk of high heat and electrical arcing. The square shape and flat pins also make it easy to plug in - no more twisting or guessing if the pins are lined up correctly.

B50ASSYPW SmartPlug 50 Amp - Female Connector & Non-Metallic Inlet / White

Video of SmartPlug RV Power Inlet and Connector - 50 Amp - White

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of SmartPlug RV Power Inlets - 50 Amp White Power Inlet and Cord Connector - SM46FR

Hi there, I'm Michael with Today, we're going to take a quick look at this SmartPlug 50 Amp Power Connector in White Inlet. This is going to upgrade your 50 amp 125 volt or 250 volt RV setup from your traditional twist type to take advantage of all the benefits of the SmartPlug system. This is going to provide the inlet for you to replace your current twist type inlet. So this does have the same mounting holes as your twist type holes. So it's very easy to get mounted in place and they do have the color coded wiring on the backside there.

So very easy to get wired. They also include instructions, walk you through how to get that all set up. So very easy to get that put in place. Your connector is going to wire to your existing power cord. So this will mount in place of your current connector and then like the inlet there, they do include instructions, help you get that all installed as well as your backing plugs, for your 115 and sorry, 125 and 250 volt backing cables there.

So that everything's going to be nice and water tight and sturdy for you. Now, the benefits of the SmartPlug system, this is going to be a straight in connection. So it's going to make plugging in much easier. If you get to your campsite late at night and it's dark, you're not going to have to worry about finding the right point to start your twist in. It's just going to fit in the one way, and then it's going to plug straight in.

So very easy to get connected there. The sleeved design is going to bear the weight of your cable, and if you we're to trip over it, that sort of thing. So all the weight is going to rest on the sleeve rather than on the pins themselves. So it's going to take a lot of strain off those pins, so that they're not going to become loose over time, like some of your other systems. Those pins are a straight nickel plated brass, that is going to maximize your electrical transfer.

It's actually going to provide about 20 times more contact than your curve style design. So you're gonna have less resistance, less heat buildup and it's gonna do a great job of allowing that electricity to flow through there. You can see, this does have a multi-point locking system that ensures that we're going to have a solid connection. So once we get that pushed in, it's going to click in place. And then we can also use the cap to make sure that the connector stays in place there. When we're ready to disconnect, just push on those Marine grade, 3/16 stainless steel tabs that will allow us to pull it out. I'm being kind of gentle because this face isn't connected. You will connect that after you get it wired up, using the hardware that they include. So just for demonstration purposes, I'm trying to be gentle with that, but once it's firmly attached, it's going to be very easy to put that in and pull it out. So very nice system here. It does have a triple waterproof seal to help prevent water corrosion from getting in there to your connections. And the white cap is going to form a weatherproof seal on the inlet when you're not using this. So a really nice system here. If you we're looking to upgrade to the SmartPlug technology. This is going to provide everything that you're going to need to convert that old system to the new. All these components are made here in the USA. So you can trust they're made to the high quality standards that we've come to know and trust for products that are made here in the US. And we do have several different options that are very similar to this with different colors. So white, isn't going to match your color scheme on your RV. We also have a black, a gray and a stainless steel. The black and gray are exactly the same materials, just a different color. That stainless steel is a metal. So just depending on what's going to match best to your aesthetics on your RV. But this is going to be a really nice system to allow you to convert a cable and switch out your inlet for you. So that's going to complete our look for today. Again, I'm Michael with Thanks for watching..

Customer Satisfaction Score:

Customer Reviews

SmartPlug RV Power Inlet and Connector - 50 Amp - White - SM46FR

Average Customer Rating:  4.9 out of 5 stars   (120 Customer Reviews)

Easily replace your inlet and rewire your power cord for a SmartPlug connection that is both safer and easier to use. This package contains everything you need to upgrade your ride for a new generation of shore power connection.


First purchase with Etrailer. Great experience. Packaging perfect. I’ll definitely use them again!


Nice plug it is very well made.



etrailer kept me in the loop on the backorder of the black SmartPlug, I understood the supply chain, but it was nice to be updated on the timeline for shipment. So nice for a company to keep you in the loop without having to chase the details!


I really like the SmartPlug! I kept noticing the old plug would turn sometimes in the socket and just about unplug itself. The SmartPlug is always secure and easy to unplug when you are ready.


Excellent customer service on the part of eTrailer. Had to exchange the stainless steel model for this one because of fitting issues. Product itself is well constructed and exceeds intended purpose!


Easy to Install. Clear instructions but you can also find install videos on YouTube. Stainless cost slightly more than the plastic version but looks great on my Airstream.


I found the installation of the inlet easy and the modification of the connector very easy. The instructions were very easy to follow and very comprehensive.

The only issue was the rear cover (pictured) for the inlet could not fit at the front location of may 2019 Airstream Flying Cloud 27 ft. FB. I also installed the cable port.


The SmartPlug installed great and after a year of heavy use continues to perform perfectly! Electrical hookups are now quick and positive with solid connections!


Can’t wait to get it installed. Looks like quality materials and ease of installation per videos.


E trailer is my go to shop for many of my components and appliances in my Van Builds. Their prompt delivery and customer service is excellent. Their consistency is something I can depend on Van to Van to Van.


Delivery was a few days later than it said at first. Otherwise, product was what I ordered. No hardware sent with the inlet which was frustrating, why on earth wouldn't the company include the mounting screws?! Works fine otherwise.


It's installed but still building trailer so have not gotten to use it yet. Will Update when i do!


Excellent product. Install was not difficult. .definitely an upgrade from the original 50 amp plug.


I received at least two emails updating me on the shipping dates and another one when it shipped. The Smartplug was on back order and they kept me up to date.


I had been looking at this plug for awhile before I bought it. I was living full time in my camper. And my old twist style plug kept blowing the breaker on the power box. Bought this to replace it. No problems at all cents then. Love it. Easy to in stall.


very high quality and easy installation.


Excellent part, excellent customer service and support. etrailer is my go to for parts.


This is a very well-built and designed product. I love the fact that it snaps securely to the inlet, and that the inlet closes securely when not in use. I got this to replace the mouse door that typically comes on campers (a huge hole port with a door that leaves a large gap while the cord is in use!). Keeping mice out is worth the price already, and this is a much better quality connector than I usually see on campers these days that use the detachable twist-lock type cords. Still working great after a year of use.


This is a very welcome improvement for our RV's Electrical hookup. Easy to install, took about an hour.
One concern, the connector instructions that I downloaded stated to cut back the cable outer jacket 1.25". The instructions that came with the connector stated to cut back the cable outer jacket to 1.75". I feel the 1.25" was correct. 1.75" does not really give you enough exposed outer jacket to achieve the required 1/4" grip by the cable clamp swing arm.


Easy to change cord plug. Outlet was a bit challenging as I couldn’t get wires pulled out far enough, so had service center do that part. It’s a little hard to push all the way in so side latches catch; but top latch secures.


The quality of products that etrailer provides, as well as the pricing are just two of the reasons I shop here first. I have found it’s the rare circumstance that etrailer may not carry an item I’m looking for. In most instances it’s because the manufacturer is behind on shipments or their inventory. They have provided a great service and I’m a very happy customer.


The Smart Plug is a quality upgrade to our Airstream. It looks good and was an easy quick install.


I Just installed this today. This plug is awesome! It is part of my mouse proofing project. Mice were coming in thru the the old cable opening. That is another story. The directions on this were easy to follow and clear. I didn’t think my cord would fit in the strain reliever but with enough soap it did. The only suggestion I have is that they include 4 stainless screws to fasten it to the camper. My only regret is not doing it sooner.


Excellent improvement over OEM 30A conn ection

Show More Reviews

See what our Experts say about this SmartPlug RV Power Inlets

  • Mounting Hole Dimensions of 50 Amp SmartPlug RV Power Inlet and Connector
    I sure can; I have added a photo for you with the dimensions of the mounting hole for the 50 amp SmartPlug inlet and connector. This comes in your choice of three different colors, and the dimensions are the same for each: - Black: SmartPlug RV Power Inlet and Connector - 50 Amp # SM76FR - Gray: SmartPlug RV Power Inlet and Connector - 50 Amp # SM66FR - White: SmartPlug RV Power Inlet and Connector - 50 Amp # SM46FR Overall the whole unit is 4-1/2 inches tall and 3-1/4 inches wide.
    view full answer...
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  • Is There 50 Amp SmartPlug Power Inlet & Outlet
    We do indeed have SmartPlug 50 amp inlets and outlets; you can even choose from your choice of color: - White: SmartPlug RV Power Inlet and Connector - 50 Amp # SM46FR - Gray: SmartPlug RV Power Inlet and Connector - 50 Amp # SM66FR - Stainless Steel: SmartPlug RV Power Inlet and Connector - 50 Amp # SM96FR
    view full answer...
  • Is There A SmartPlug 50 Amp To 15 Amp Adapter Cable Available
    Yes, you're looking for the SmartPlug RV Power Cord Adapter - 50 Amp Female to 15 Amp Male - 4' # SM93VR. This adapter will allow you to plug into the 50amp SmartPlug inlet # SM46FR on your trailer and convert down to a 15amp power source. That being said you since you are plugging into a 15amp power source you won't be able to run larger appliances and could potentially blow the circuit if you turn on too many things in your trailer. I'd keep it to just charging your trailer/letting...
    view full answer...

Do you have a question about this RV Power Inlet?

Info for this part was:

Employee Amanda M
Edited by:
Amanda M
Employee Halie H
Written by:
Halie H
Employee Michael B
Installed by:
Michael B
Employee Cody B
Updated by:
Cody B

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