B234SR120M-A Universal Ballast - F34T12 or F40T12 Fluorescent Tubes

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  • B234SR120M-A Universal
  • B234SR120M-A Universal Ballast Wiring
  • B234SR120M-A Universal Ballast Dimensions
  • B234SR120M-A Universal
MSRP: $16.00
Now: $11.75
Was: $16.00
— You save $4.25


UNIVERSAL Electronic Fluorescent Ballast, 120V, Two F40T12, F40T12ES, F34T12, F32T12, or F40T10 Linear and U-bend Lamps, Rapid Start Ballast.

Universal Electronic Fluorescent F40T12 or F34T12 Replacement Ballast

Basic-12® ballasts are the ideal replacement for magnetic T12 ballasts. Save 20% on energy without changing the lamp or fixture! 

More than 500 in stock and ready to ship same day!

  • 20% increase in efficiency - lowers lighting operation cost
  • Full Light Output - same level as magnetic equivalent
  • Quite Operation - much quieter that magnetic equivalent
  • High Frequency Operation - no lamp flickering
  • Light weight and low profile case - simplifies install with less cover interference in fixture
  • Excellent 3 year warranty 
  • UL Listed (Class P, Type 1 Outdoor), CSA Certified
Equivalent Replacement for:
  • Osram Sylvania MB2X40/120RS, QTP2X40T12/120RSN-B
  • Advance Philips R-2S34-TP, R-2S40-TP, Mark III, R-2S40-1-TP, RK-2S34-TP, RK-2S40-TP, RELB-2S40-SC, RQM-2S40-3-TP
  • Hatch HL240RS/12/W
  • Howard M2/40RS-120
  • PLP/Sli/Valmont: 6G1020, 6G1022, 89G480, 89G999, 8G1018, 8G1021W, 8G1022W, 8G1023W, 8G1024W, 8G1025, 8G1028W, 8G1122W, RF-240, RFC-240, RFH-240, RFH-240ES, RHC-240, M28-120, M-28-120,
  • Sola E-420-F-234-IC, ERSF-240-TP
  • Universal \ MagneTek 446-L-SLH-TC-P, 438-L-TC-P, 420-L-TC-P, W589DTCP, 755-L-SLH-TC-P magnetic ballasts
  • Pacific EN-234-TP
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Additional Information

Our Part No:
Mfr Part #:
Input Voltage:
(2) F40T12ES, (2) F40T12, (2) F34T12, (2) F32T12, (2) F40T10. Also equivalent U-bend.
9.50" (L) x 1.70" (W) x 1.18" (H)
Product Data Sheet:
Meets Energy Star Requirements
Fixture Type:
Case Size:
Alternative Keywords:
B234SR120MA, B234SR120M-A0001, B234SR120M-A000I, B234SR120M-A010C
Number Of Lamps:
F32T12, F34T12, F40T12, F40T12ES
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15 Reviews

  • 5
    B234SR120M-A Universal Ballast

    Posted by Gary on Dec 27th 2019

    Perfect fit. Had plenty of extra wire to make easy splice. The website was easy to navigate and showed me all the replacement ballast for quick and easy install.

  • 5
    Excellent replacement

    Posted by David Stevenson on Dec 1st 2019

    Just a couple of usage notes. First, the old ballast is HEAVY. Be sure you have a good grip when unbolting it from the ceiling. Second, cut the old leads long until you work out the required lengths. All the tube leads are on the same end of this unit, so the yellows are a little short. Not a problem if you plan ahead... I was able to remove the socket assemblies from the fixture, so I could prewire the lamp connections (easier than working on the ceiling). This is a perfect fit for an old 10" ballast, and works great.

  • 5
    Replacement Ballasts

    Posted by Unknown on Oct 3rd 2019

    These were used to service a 25 year old fixture in my kitchen I had been advised by both a clerk at a big box store and a knowledgeable gentleman at my local hardware store I would either not be able to find replacements for or if I did would cost me more than purchasing an entire new fixture. The reasonable cost and prompt shipment of these correctly identified replacement parts solved my problem. Thank you.

  • 5
    Replacement Ballast

    Posted by John MCGuire on Sep 4th 2019

    New ballast works well. Installation was easy. I appreciated that the wire colors were exactly the same as on the old ballast.

  • 5
    This electronic ballast is the perfect replacement for the old magnetic ballast in older fluorescent fixtures. I bought LED replacement bulbs but they wouldn't play with the magnetic ballast and the fixture was old enough that newer un-shorted tombs

    Posted by Joseph Barrera on Aug 21st 2019

    Good product.

  • 5
    Fit into the device and works well

    Posted by Gerald Curran on Aug 13th 2019

    Fit into the device and works well

  • 5
    Great Replacement Ballast!

    Posted by William Lewis on Jul 28th 2019

    The magnetic ballasts in my light fixtures were giving me all kinds of problems. The fluorescent tubes would take forever to light up, especially in humid weather. So I ordered three B234SR120M-A's at BallastShop. They were very reasonably priced and arrived quickly. When I replaced the old ballasts, the difference was dramatic. Now the tubes light up instantly, and I am a VERY happy camper :-).

  • 5
    Electronic ballast

    Posted by Jim on Jul 18th 2019

    Part worked as a replacement for antique ballast. Hook up was simple and even better it worked.

  • 4
    Universal Ballast (Received 3 ballasts.)

    Posted by Robert Schepis on Jun 29th 2019

    1 ballast sealed in plastic wrap, the other 2 had rubber bands, wire lengths different on each one, making me wonder if they were all new or some refurbished. Had to shorten wires on one ballast, and splice extra wires on the other two. Having said that, they all work great, lights go on instantly, no flickering, and are brighter than before.

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