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Universal 443-L-SLH-TC-P Magnatek Fluorescent F40T12 Ballast

3.40 LBS
Ships within 24 to 48 hours. Product may be out-of-stock or back-ordered without notice. Please call for immediate availability.

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Product Description

Sorry Friend, the Universal 443-L-SLH-TC-P ballast has been DISCONTINUED by the manufacturer.

But we got plenty of the Robertson RSS240T12MVIP in stock and ready to ship!

Your warehouse is stocked with boxes of replacement T12 fluorescent tubes to last for the next few years. Though that lamp type is being phased out, you don't have the budget to retrofit the entire facility with more efficient T8 or LEDs. Enter the bottom-dollar 2 bulb 40-watt rapid start magnetic T12 ballast from Universal Lighting Technologies. 

The 443-L-SLH-TC-P has an utterly simple bare-bones design gets those T12 fixtures burning bright again without hassle. It only works with 277-volt alternating currents, which is perfect for most industrial complexes and warehouses in North America. Its patented core-and-coil design has been trusted by the lighting industry since the 1930s and it can be used with most PLC and IR building control systems for increased energy efficiency. 


  • Lamp Type: T12
  • Lamp Wattage: 40
  • Ballast Type: Magnetic
  • Parallel Lamp Connection Series
  • Start Method: Rapid Start
  • Operates two F40T10, F40T12 or F40T12ES tubes 
  • Min Temp: 60° F
  • Single wire 277vAC input
  • : 60Hz cycles
  • "A" Sound Rating for near silent operation
  • Class P, Outside Type 1
  • Can be installed up to 20 feet from the lamp source
  • Compatible with automated PLC and IR control systems
  • Manufactured in North America
  • 36-month Factory Warranty

Call us...you know you want to!


If you know any lighting geeks, they'll tell you that magnetic ballasts are dinosaurs. But hey, why buy a more expensive electronic ballast if you're just replacing a few worn out fixtures? Your coworkers aren't going to notice the difference, and any inspector will be quickly pacified by the UL and CSA listings clearly stamped on the front.

This electromagnetic fluorescent T12 ballast is also rated for light hazardous locations, where explosive dust or vapors are present in the air. It is also designed for environments that tend to stay around 60° F and has a tremendous temperature ceiling of nearly 200°! 


External Specifications

To meet the demands of ULs Class P rating, the 443-L-SLH-TC-P is housed in a black metal case which protects the inside coils from damp weather. The ballast is completely free of lead or PCBs so it is not harmful to humans and does not require special disposal. Two mounting feet on either end of the case can be used to connect the unit to a fixture or to an adjacent support beam for remote use.

Electrical Specifications

This 40-watt T12 Universal ballast can be tied into your buildings Programmable Logic Controller (PLC) system which monitors the output and regulates several ballasts at once. The 443-L-SLH-TC-P uses a "Rapid" start method which heats the lamp electrodes before the inrush of voltage is supplied. Bulbs will start with a brief delay, but without the annoying flash of "Preheat" start types and an extended lamp life over "Instant" start types.


  • Width: 9.5”
  • Height: 1.5"
  • Depth: 2.38”
  • Mounting Height: 8.9"


  • UL Listed Class P, Outdoor Type 1
  • CSA 654 Standards for fluorescent ballast efficacy 
  • Meets National Appliance Energy Conservation Act (US Law 100-357)
  • ANSI Standard C82.11 for low THD
  • FCC Part 18 Class B (Consumer Limitations)

Warranty Information

The manufacturer warrants to the purchaser that each magnetic ballast will be free from defects in material or workmanship for a period of 36-Months from the manufacturing date. Warranty only applies to ballasts installed in accordance with the National Electric Code.

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