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Now In: Low Voltage Transformers  >  Electronic Transformers  >  300-Watt 12-Volt Round Electronic Low Voltage Transformer, Lightech

Product Overview:
  • Minimum watts: 50
  • Maximum watts: 300
  • Dimmable
  • UL recognized
  • 3-Year warranty
  • Learn More

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300-Watt 12-Volt Round Electronic Low Voltage Transformer, Lightech

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300-Watt 12-Volt Round Electronic Low Voltage Transformer, Lightech

Item #LET-301-12V-AC
AvailabilityUsually ships in 2-3 business days
Quantity  Add to cartAdd to Wishlist

About our 300-Watt 12-Volt Round Electronic Low Voltage Transformer, Lightech

This 300-watt low voltage electronic transformer will power your 12-volt halogen or xenon lighting systems. Electronic transformers are generally smaller, lighter, quieter, and cooler than magnetic transformers.

  • Uses: used to power 12-volt halogen or 12-volt xenon lighting systems.
  • Maximum 300 Watts of Load: 300 watts maximum of lighting load. Unlike most magnetic transformers, these electronic transformers can be used to power the maximum wattage. [Caution: Always attach the load to the transformer before connecting the transformer to power.]
  • Minimum 50 Watts of Load: unless this transformer is powering at least 50 watts of lighting load it will not work properly
  • Input: 120 volts AC, 60 Hz, 2.5 amps
  • Input Leads: one 6-inch 18 AWG white wire (neutral) and one 6-inch 18 AWG black wire (hot)
  • Output: 11.75 volts AC, 24.4 amps [Caution: a standard AC voltmeter cannot measure the output of a high frequency electronic transformer; instead, a special "true RMS" voltmeter must be used.]
  • Output Leads: two 6-inch 12 AWG blue wires [Suggestion: Use a terminal block for each connection in the 12V output circuit and make certain that these connections are very tight and secure. Also, be sure that the gauge of the electrical wire used in the output circuit is not less than 12 AWG.]
  • Installation: the transformer and all of the hardwired electrical splices (connections) should be stored in an enclosed metal junction box (not included)
  • Compact Size: 3-11/16in(Diameter) x 1-3/8in(Thick)
  • Weight: 15.4 oz
  • Dimmable: fully dimmable using a dimmer designed for an electronic transformer. An electronic transformer can sometimes work with a standard incandescent dimmer. However, to ensure that your lighting system works effectively with the greatest dimming range we recommend that you use a dimmer that was specifically designed to control an electronic low voltage transformer. Additionally, using this type of dimmer will diminish the possibility of an audible hum when the dimmer is used especially at low light levels. [Caution: dimmer should always be connected to the input side, 120V side, of a transformer.]
  • Short Circuit Protection: yes with auto-reset
  • Overload Protection: yes with auto-reset
  • Thermal Shutdown Protection: yes with auto-reset
  • Color: black
  • UL Recognized: UL recognized in USA and Canada
  • Brand: Lightech
  • 3-Year Warranty: this electronic low voltage transformer carries a 3-year warranty
  • Large Quantity Discount: If you would like us to quote on a large quantity of 300W 12V AC Electronic Low Voltage Transformers, please call us at our toll-free number or use the online Quotation Request for Large Quantities form. We are always happy to provide you with our best large quantity pricing.

    UL Recognized  3-Year Warranty  Satisfaction Guarantee    Installation Difficulty

Product Reviews
300-Watt 12-Volt Round Electronic Low Voltage Transformer, Lightech
4.5 Stars based on 2 Review(s)
Evansville, IN
5 Stars
I would recommend this item to a friend.

300 Watt Electronic Transformer
January 6, 2013
Works great Fits in a small enclosure, which is what I needed

Garry Waters
Baltimore, MD
4 Stars
I would recommend this item to a friend.

Assistant Director Electrical Distributions and Building Envelope
September 14, 2012
This item is totally new to me but was easy to install.
How compact this unit is.

Questions & Answers
By Mike Muha from California on November 7, 2012
[Caution: Not recommended for low voltage cable lighting systems that use cables suspended between walls to support and power decorative low voltage light fixtures hanging from the cables.]

Why not?
By Jacob from Pegasus Lighting on November 8, 2012


You would likely have a problem known as voltage drop if you used this transformer with a low voltage cable lighting system. Lights on the far end of the cable would appear dimmer than the lights nearest the transformer.

By Ray from Boston Ma on September 1, 2013
What would you recommend for a transformer to power low voltage cable lighting? I need a 200 watt unit.
By Jacob from Pegasus Lighting on September 2, 2013

I would recommend a transformer with multi-tap/boost tap built in to compensate for voltage drop. See our items here -

By Armand Deny from Pasadena, CA on April 27, 2013
Can this product be used with a 12 volt ac 12 amp magnetic drive water pump?
By Jacob from Pegasus Lighting on April 28, 2013


This transformer is designed for lighting load and not water pumps.

If your water pump requires 12V AC and if the water pump does not use more than 300W, then this item MIGHT work.

I would suggest contacting the manufacturer of your water pump to see exactly why type of transformer is required.

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