1. Trailer Lights
  2. Optronics
  3. Clearance Lights
  4. Round
  5. Incandescent Light
  6. Amber
Optronics Trailer Clearance or Side Marker Light - Submersible - Incandescent - Round - Amber Lens

Optronics Trailer Clearance or Side Marker Light - Submersible - Incandescent - Round - Amber Lens

Item # MC57AB
lowest price pledge
Retail:$3.72
Our Price: $3.01
You Save: 19%
Trailer Lights
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.07 lbs
Quantity: 
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Videos

2-1/2" Diameter round. Waterproof, incandescent trailer light serves as a clearance or side marker light when properly mounted. Built-in reflex reflector. Recessed mount with grommet (sold separately). Accepts standard 2-prong plug. P2 rated. Lowest Prices for the best trailer lights from Optronics. Optronics Trailer Clearance or Side Marker Light - Submersible - Incandescent - Round - Amber Lens part number MC57AB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (48)
  • Q & A (15)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - MC57AB

  • Clearance Lights
  • Round
  • Incandescent Light
  • Amber
  • Recessed Mount
  • 2-1/2 Inch Diameter
  • Submersible Lights
  • Optronics
  • Rear Clearance
  • Side Marker

2-1/2" Diameter round. Waterproof, incandescent trailer light serves as a clearance or side marker light when properly mounted. Built-in reflex reflector. Recessed mount with grommet (sold separately). Accepts standard 2-prong plug. P2 rated.


Features:

  • Round trailer light functions as either a side marker or clearance light when properly mounted
  • Built-in reflex reflector removes the need for a separate reflector
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Incandescent bulb can be easily replaced
  • Durable polycarbonate housing and lens
  • Amber snap-on lens over incandescent bulb
  • Compatible with 12V DC electrical systems
  • Recessed mount with grommet (A55GB or A56GB - both sold separately)
  • Accepts industry standard 2-prong plug (A46PB or A86PB - sold separately)
  • DOT compliant
  • P2 rated


Specs:

  • Dimensions: 2-1/2" diameter x 11/16" thick
  • Bulb type: incandescent
  • Power draw at 12.8V: 0.2 amps
  • 3-Year warranty


Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # SR2500A
Wesbar # 223223
Truck Lite # 10205Y
Grote # 45813
Peterson # 143A


Optronics MC57 Series Marker Clearance Light Dimensions

Sonically Sealed, Waterproof Trailer Light

The waterproof construction of this light makes it ideal for use on trailers that may be submerged, like a boat trailer. The housing and lens are sonically sealed together to create a single unit, which means that water will not get into the light and damage the diodes or circuit board.


P2-Rated Lights

Diagram of light spread for P2 rated light

A P2-rated light produces a 45-degree angle of light to either side of its centerline for a total of 90 degrees of coverage. This beam pattern can be seen straight on, but it cannot be seen clearly from the side. So this type of light can be used as either a side marker light or a clearance light, but it cannot function as both. If you need both functions, then you must install 2 separate lights on your trailer - one as a front or rear clearance light and one as a side marker light.



MC57AB Optronics Trailer Clearance or Side Marker Light - Submersible - Incandescent - Round - Amber Lens - P2 Rated

Alternate part number: MC-57AB




California residents: click here



Customer Reviews

Optronics Trailer Clearance or Side Marker Light - Submersible - Incandescent - Round - Amber Lens - MC57AB

Average Customer Rating:  4.9 out of 5 stars   (48 Customer Reviews)

2-1/2" Diameter round. Waterproof, incandescent trailer light serves as a clearance or side marker light when properly mounted. Built-in reflex reflector. Recessed mount with grommet (sold separately). Accepts standard 2-prong plug. P2 rated.

- MC57AB
by:

Exactly what I needed. The websites showed me the breakdown of the part (exact size measurements) and I was able to order the correct replacements that I needed. Shipping was also very fast. 496151



- MC57AB
by:

E trailer did a fantastic job. Before order: Technical support / help was excellent. Goal, conversion of a 1998 Floe snowmobile trailer from surge to electric brakes. Problem, due to time and corrosion, I could only supply partial part numbers, spindle diameter. etrailer did a fantastic job, researching, and getting me the correct part numbers, so I could order. Julie did a great job. She was very timely, communicated clearly and honestly, and just “kept me in the loop”. I received the order came on the projected date, complete and undamaged. Excellent. I would highly recommend etrailer, for your part needs. 439122



- MC57AB
by:

Broke one of my warning lights and stretched out the rubber grommets. Perfect fit and matched my existing lights like nothing ever happened. Awesome price and was delivered quickly. You have a customer for life thank you. 461616



- MC57AB
by:

883980



- MC57AB
by:

Looks nice. Shipped and arrived quickly. I'll install them when it isn't so hot out. :) 862730



- MC57AB
by:

Exact match for what I was replacing. Seems to be a quality product. 847708



- MC57AB
by:

Fit on my 2004 Winnebago perfect as a front overhead marker light. Works great. 796747



- MC57AB
by:

All items ordered were in the box to do the needed repairs - I can't wait to get started - Parts look good - Thanks 681698



- MC57AB
by:

Great product and fit perfect. 672999



- MC57AB
by:

Functions as expected. 667368



- MC57AB
by:

A+ 606240



- MC57AB
by:

Works great 582650



- MC57AB
by:

3 x cheaper than any other place online and better quality. Definitely buying from here now. 582306



- MC57AB
by:

this is a great product, original equiptment priced $15.00 lower than other suppliers. I received the light in a couple of days and will use etrailer again. thanks guys 543838



- MC57AB
by:

Works as expected. Grommet not included FYI. 513529



- MC57AB
by:

Product as described 486785



- MC57AB
by:

Good service and product was as describ ed. 472160



- MC57AB
by:

Good product, in timely fashion for standard shipping, Thanks. 459656



- MC57AB
by:

A very good product and very fast shipping ! 451561



- MC57AB
by:

Great product at a great price. They fit perfect and I installed them in only a few minutes. 428287



- MC57AB
by:

The lights are fine but the 2 1/2" grommets are too small for PJ trailers. Had to reuse the old ones. 405819



- MC57AB
by:

Very good quality,,just like the OEM marker light that came on my trailer. 394810



- MC57AB
by:

Products came on time and were exactly as described. Great service and great quality. Willdo business with again. 355284



- MC57AB
by:

nice light works well 329986



- MC57AB
by:

Excellent service. 319512


25
48
Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Replacement Amber Clearance Light for Dutchman Kodiak
    The lenses on clearance lights are not generally removable as they are often "sonically sealed" such as the Optronics Trailer Clearance or Side Marker Light # MC57AB; this means they are submersible. Instead of buying a light and taking the lens off I strongly recommend an LED Trailer Clearance or Side Marker Light w/ Reflex Reflector # MCL59AB for your Dutchman trailer because an LED is a far better, much longer lasting option. You only need to make sure your existing lights have the...
    view full answer...
  • What Is Hole Size For Mounting 2 Inch Round Trailer Lights With Rubber Grommet
    The item you selected, Sealed 2-1/2 Trailer Light, part # MC57AB, is a 2-1/2 inch light that will mount into a 3 inch hole using 2-1/2 inch grommet, part # A55GB. The hole size to mount a 2 inch round light flush mounted would be 2-5/16 inches. The grommet you would need for a 2 inch light would be 2 Inch Round Grommet, part # A54GB. If you are flush mounting your lights, the 2 inch light will sit inside the grommet. A 2 inch light similar to the one you selected is part # MC53AB. We...
    view full answer...
  • Can Optronics Sealed 2-1/2 Inch Light be Mounted in a 2-7/8 Inch Hole
    In order to install this light, you will need a grommet to fit the hole. We have a grommet for a 2-25/32 hole, which is just under 2-7/8 as well as a grommet that fits a 3 inch hole. If you can re-measure the hole with something that has 16th inch or 32nd increments we can get a more accurate measure of the hole. If it is a 2-25/32 inch hole, you would use grommet # A57GB. If you find it is a 3 inch hole, you can use part # A55GB. Both of these grommets will work with the MC57AB.
    view full answer...
  • What Size Hole is Needed to Mount Optronics 2-1/2 Inch Side Marker Light with Reflector and Grommet
    The Optronics Sealed 2-1/2 Inch Round Trailer Clearance, Side Marker Light # MC57AB along with the Round Grommet - Floush Mount # A55GB will require you to cut a 3 inch diameter mounting hole. You will also need the Right Angle 2-Wire Pigtail Plug # A46PB to pair with the female connection on the Optronics light. I have attached video reviews of these products for you to look at.
    view full answer...
  • 2-1/2 Inch Amber Clearance Light Recommendation for Trailer
    For an amber clearance light that is 2-1/2 inches in diameter that uses a grommet for installation you would want the part # MC57AB. For a grommet you would want the part # A55GB and then for a pigtail part # A46PB.
    view full answer...
  • What Size Hole Drilled to Install the Side Marker Light Part # MC57AB with Round Grommet # A55GB
    The recommended grommet to go with the Side Marker Light Part # MC57AB that you referenced is the Round Grommet # A55GB which will require a 3 inch hole.
    view full answer...
  • What Size Hole Is Needed For Mounting Optronics Trailer Light, # MC57AB, In A Rubber Grommet
    To mount the Optronics Trailer Light, # MC57AB, in a rubber grommet you would use the Optronics 2-1/2 Inch Round Grommet - Flush Mount, # A55GB. This grommet will require a 3 inch mounting hole. To mount the Optronics Miro-Flex, Sealed, 4 Inch Round, Stop/Turn/Tail Light Trailer Light, # STL23CCRB, in a rubber grommet you would use the Optronics Rubber Grommet for 4 Inch Round Trailer Tail Lights, # A45GB. This will require a 4-1/2 inch mounting hole.
    view full answer...
  • Diameter of Rough Opening Needed for Optronics MC57AB Trailer Clearance/Side Marker Light
    The lamp you've looked at, part # MC57AB is designed to be mounted in a 3 inch diameter rough opening. The lamp is designed to be used with a grommet, part # A55GB. You'd also need a # A86PB wiring pigtail. If you would reply with the dimension of the rough opening in the trailer where the light would mount, I'd be happy to make a suggestion. I've linked you to product description videos for the lamp, grommet and wiring pigtail.
    view full answer...
  • Availability of Rubber Grommet to Install Round Trailer Lamp in 3 Inch Rough Opening
    We don't have a grommet that will secure a 2 inch lamp in a 3 inch rough opening, but the Optronics # A55GB rubber grommet will work with a 2-1/2 inch diameter lamp like the # MC57AB you'd looked at. The 2-1/2 inch diameter lamp is also available in red as part # MC57RB. Each lamp would use a # A86PB pigtail, which is sold separately.
    view full answer...
  • Replacement Clearance Light for my 2004 Winnebago Minnie Winnie
    The Optronics Trailer Clearance or Side Marker Light part # MC57AB can be used with or without a grommet it is a standard size type light that can be utilized many different ways. As for the pigtail as you said in theory should be there but it always varies and in some cases it won't be there. I would pick one up and add it regardless just to make changing it in the future much easier if need be. The Right Angle 2-Wire Pigtail for Optronics Trailer Lights part # A46PB is the one to use.
    view full answer...
  • Replacement Boat Trailer Lights for 2-3/4" Rough Cutout and 2-1/4" Grommet
    I have a solution for you, but we do not have any replacement lights that will fit in those grommets. Instead, you can use the LED Clearance or Side Marker Light # MCL002AXB (amber) and # MCL002RXB, which require a rough cutout dimension of 2-3/4", so they'll fit in your existing holes and provide you with the light solution you're looking for. These are waterproof LED lights so they're the perfect solution for a boat trailer as long as the rest of your lights are already LED. If your...
    view full answer...
  • Looking for Trailer Clearance/Marker Light to Replace Trucklite Model 10
    According to my research, I have found that the Trucklite model 10 clearance/side marker light measures 2-1/2 inches in diameter. Because the Optronics # MC53AB measures 2 inches in diameter, it would not be a good replacement. The Optronics # MC57AB, with its 2-1/2 inch diameter, would be the correct replacement. If you need a mounting grommet, it is available as part # A55GB. The two pin wiring pigtail is also available as part # A46PB.
    view full answer...
  • Replacement Clearance Light with a Reflective Lens for a Horse Trailer
    The Optronics light, MCL71AB, does not have a reflector in the lens. I made a short video that shows the light with the lens off. It would be a fairly water resistant light. A better option may be # MC35AB. It is about the same size and it has a reflector in the lens. It is not as low profile as the flush mount light you referenced. If you are not opposed to switching to round we have # MCL59AB or # MC57AB which has a reflector in the lens and can be flush mounted using harness #...
    view full answer...
  • Availability of Mounting Bracket for 2-1/2 Diameter Round Sealed Trailer Lights
    We do indeed have a bracket designed for 2-1/2 inch diameter trailer lights, part # BK55BB. You would also need the rubber grommet, part # A57GB. The bracket and grommet would work with a 2-1/2 inch diameter lamps like part # MC57RB or # MC57AB.
    view full answer...
  • Marker Light to Replace Peterson 143 on 2007 Fleetwood Pop Up Camper
    I did some research, and found that the Peterson 143 is a flush grommet mount lamp, not a flange mount. The lamp itself is 2-1/2 inches in diameter. The Optronics # MC57AB would be a comparable replacement. You'd also need a # A57GB grommet and a # A46PB pigtail. If the # MC57AB doesn't match your lamp, please send me a reply email with a photo of the lamp attached, and I'd be happy to try to find a replacement for you.
    view full answer...

Do you have a question about this Trailer Light?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer lights for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer light information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Expert Research:
Patrick B
Expert Research:
Jeff D
Expert Research:
Reno H
Expert Research:
Jameson C
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Brian T
Installed by:
Cole B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 800-298-8924