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SmartPlug RV Power Inlet - 30 Amp - White

SmartPlug RV Power Inlet - 30 Amp - White

Item # SM57FR
Our Price: $113.90
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RV Power Inlets
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Get your ride SmartPlug ready. Replaces the fiddly twist lock inlet with a more secure and safe connection. Plug in with ease and have one less thing to worry about. Installs into the same footprint as a standard inlet with no modification needed. Great Prices for the best rv power inlets from SmartPlug. SmartPlug RV Power Inlet - 30 Amp - White part number SM57FR can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (135)
  • Q & A (0)
  • Videos (1)
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SmartPlug RV Power Inlets - SM57FR

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

Get your ride SmartPlug ready. Replaces the fiddly twist lock inlet with a more secure and safe connection. Plug in with ease and have one less thing to worry about. Installs into the same footprint as a standard inlet with no modification needed.


  • Inlet lets you plug in your SmartPlug cord to power your RV or boat
    • 3-Prong male inlet accepts SmartPlug 30-amp female connectors (sold separately)
    • Cables lock in place for secure connection
  • 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
  • Flat electrical pins increase contact area compared to curved pins in twist locks
    • Reduces heat caused by electrical resistance
  • Inlet cap snaps down onto plug body when in use to reduce strain
    • Helps stop plug from being yanked out accidentally
  • Rubber seal keeps inlet safe from the elements when not in use
  • High-quality materials hold up in 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 - sized to fit standard inlets so you can use the same screws and holes
  • White color
  • Made in the USA


  • Amperage: 30 amps
  • Voltage: 125 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.

BM30PW SmartPlug 30 Amp - Non-Metallic Inlet w/ White Cover Assembly

Video of SmartPlug RV Power Inlet - 30 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 - 30 Amp Power Inlet - SM57FR

Hi there, I'm Michael with Today we're gonna take a quick look at the SmartPlug 30 amp replacement power inlet. This inlet is gonna replace a 30 amp or 125 volt AC inlet on your RV or boat. And this will allow you to plug it in to shore power with a 30 amp SmartPlug power cord that is sold separately, but I do have an example here so you can see how this is gonna work. So these power cords do have a cap that you'll remove and that's gonna help protect them when they're being stored. But if you haven't already upgraded to the SmartPlug, one of the main benefits of this system is that it is going to be a straight plugin.

So unlike your twisting systems that are pretty common on your RVs, this is gonna be very simple to get plugged in even in the dark. You're not gonna have to be able to figure out where your L pin is and get it lined up properly. So you can only plug it in the one way and then it's gonna give you a nice secure attachment there. The straight-in connection is going to also create more connection. So it's about 20 times more contact than your curved system design.

So it's going to reduce the heat caused by electrical resistance with your traditional twist style connections. They don't really have a whole lot of contact, so there's a lot of heat that can build up with those and that can cause issues obviously. So this is going to be a much more secure option for you. That sleeved design is gonna help keep the weight and tension off the electrical pins. So this is going to be a very sturdy option for you.

It does also have triple weatherproof seals that prevent any water, corrosion, and overheating, that sort of thing. So you can see we've got that inner ring there that's going to fit inside here. And then we've got this inner portion so it is gonna be very secure and weatherproof. So again, we have the cap here that's going to help prevent that cord from coming out. So even if you we're to trip over the cord, you're not gonna pull it out.

It's gonna be very securely connected there. The cap also forms a weatherproof seal on the inlet. So when it's not in use, it's going to make sure that your connections stay nice and dry. No worries there. This is made here in the USA of high quality materials that are gonna hold up to your extreme climates, as well as being out on the water if you're installing this on a boat. So it will be very durable for you. The plastics are a UV and heat resistant VALOX 553U resin and our electrical pins are nickel-plated brass and we do have tinned wires that are gonna be resistant to corrosion. So very, very simple to get installed. It does fit right in place of your traditional twist type inlet. So all the holes are gonna line up. So basically just take your old one off and you'll be able to put this one in. You won't have to drill a new holes or anything like that. They do include instructions to show you how to get everything wired. You can see we got that gasket there to make sure we've got a nice tight seal on the backside. So overall, just a major improvement in how you're connecting to your shore power, giving you a much more solid connection, that you're not gonna have to worry about coming loose or getting damaged and also giving you more contact so that there's less resistance, less heat. That completes our look for today. Again, I'm Michael with Thanks for watching.

Customer Satisfaction Score:

Customer Reviews

SmartPlug RV Power Inlet - 30 Amp - White - SM57FR

Average Customer Rating:  4.8 out of 5 stars   (135 Customer Reviews)

Get your ride SmartPlug ready. Replaces the fiddly twist lock inlet with a more secure and safe connection. Plug in with ease and have one less thing to worry about. Installs into the same footprint as a standard inlet with no modification needed.


This Smart plug inlet plug is true to size. I've used the Smart Plug system on other RVs and am familiar with the better contact area. I was delighted to see that this plug fit inside the connection center of my campervan, and still be able to close cover with no bulging.


No complaints. Got what I ordered, installed it and it worked. SmartPlug 30amp white.


The old style RV plugs are prone to have connection problems which causes melting of the unit. That happened to me in below freezing weather and we lost power to our trailer. This new plug will not have that problem. It fits together solidly and I don't worry about any loose connection. I have seen that the SmartPlug is now standard equipment on Airstream trailers. That's quite an endorsement. You Cann't go wrong with the SmartPlug system.


When saw this of course I said I wanted it. This make hooking up a lot easier and I feel more secure about the electrical connection. Now my friend wants me to change his. The conversation was very simple.


I have on several occasions experienced times when my electricity inside our RV wasn't working. It would inevitably be because the connection from shore power to the camper was loose. I just installed my new SmartPlug today and already feel confident in the connection. Purchasing from etrailer was easy and the product shipped in a timely manner.


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!


Superior to all other shore power inlets! This system is amazing.


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


Purchased connector at customer's request. I'm impressed by the quality of the product.


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.


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.


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.


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


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!


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


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.


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


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.


very high quality and easy installation.


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


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.


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.


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.

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Info for this part was:

Employee Wilson B
Updated by:
Wilson B
Employee Cody B
Updated by:
Cody B
Employee Amanda M
Edited by:
Amanda M
Employee Jonathan Y
Video by:
Jonathan Y
Employee Halie H
Written by:
Halie H
Employee Michael B
Installed by:
Michael B
Employee Kevin C
Test Fit:
Kevin C

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