Intermatic 100 Watt Transformer - PX100



Part # PX100

By Intermatic

  4.86 Average  



Part # PX100

Alternate Part #'s 57-155-1000, INTPX100

Product Description

12V Galvanized Steel Intermatic Transformers PX100
These Safety Intermatic Transformers are specifically designed to supply 12 volts to pool/spa lights, submersible fixtures and outdoor garden lights. A grounded shield between the primary and secondary windings assures safe operation and the built-in circuit protection will disconnect power to the intermatic transformers in case of defect or overload.

Product Specs

  • 100 Watt, Beige Steel Enclosure
  • 120 V, 3 Amp
  • 12 or 13 V
  • Intermatic Transformers Dimensions: 7.25" (Height) 5.25" (Width) X 4.5" (Depth)


Product Specifications

12 V
100 W

?     Asked on 6/9/2021by Mark Farrell

Hi, Is this transformer suitable for use with: Pool Astrolite 12V 300W 100 Ft Cord SS - W3SP0581S100? I currently have a light using 120V and want to be safer with a 12V. Is this a good pairing? And I can simply replace the incandescent bulb it comes with and led version, correct? Thank you!

A  Answered on 6/10/2021 by InyoPools Product Specialist Craig C.

Hello Mark.  The Intermatic 100 Watt Transformer part #PX100 is compatible with the Hayward Astrolite 12V 300W Pool Light Fixture.  The 12V incandescent bulb that is installed in the fixture can be changed out to a 12V LED white or color bulb.  ColorSplash LXG LED Pool Lamp 12V - LPL-P2-RGB-12    PureWhite LED Pool Lamp 12V - LPL-P2-WHT-12

?     Asked on 8/15/2019by Richard

I am looking for the transformer only to replace a filed one, I already have the weatherproof beige box. Thank you

A  Answered on 8/16/2019 by Industry Professional

The internal transformer only is mfg part # 19T267

?     Asked on 7/19/2019by George Heine

we presently have three 100 W boxes. Thinking of using a 300 W box for the three but don't know how to wire, Box 100w has three wires but box 300 has four. How to wire??

A  Answered on 7/19/2019 by InyoPools Product Specialist Lennox H.

Hi, George. You will wire the box according to the output voltage, 12, 13, or 14. Reference the Intermatic PX100 & PX300 Installation Manual

?     Asked on 5/30/2019by Mike McDonald

will this transformer work with a PL5822?

A  Answered on 5/31/2019 by InyoPools Product Specialist Steve M.

Mike, yes, the PureColors LED Bulb & Pentair Amerlite Pool Light Fixture Kit 12V 100' Cord - PL5822 has a 35 watt LED in it. So, yes the Intermatic Intermatic 100 Watt Transformer will work with this light. Keep in mind this transformer is not to exceed a load capacity of 100w. 

?     Asked on 5/24/2019by PHILIP

Is the PX100 transformer a class 2 transformer (magnetic core, 12 V AC). Will it w?rk with the SR Smith Treo LED pool light?

A  Answered on 5/24/2019 by InyoPools Product Specialist Lennox H.

Hi, Philip. Yes, this Transformer can be used with the S.R. Smith Treo LED pool lights. 

?     Asked on 12/5/2018by krishna

Do the transformers have UL 379

A  Answered on 12/5/2018 by InyoPools Product Specialist Lennox H.

Hi, Krishna. The Intermatic Transformers are not UL 379 certified. 

?     Asked on 8/22/2018by Kevin

Can you get this or a similar transformer with a remote?

A  Answered on 8/22/2018 by InyoPools Product Specialist Lennox H.

Hi, Kevin. Unfortunately, this transformer is not available with a remote. You can purchase an external control that can control the circuit that powers this unit.

?     Asked on 4/16/2018by Chris

Should this transformer be wired in before the switch or after the switch? IE: should it always have power to it, or should the switch control whether or not the transformer gets power?

A  Answered on 4/17/2018 by InyoPools Product Specialist Lennox H.

Hi, Chris. The transformer will be placed after the switch. So the switch will control the transformer.

?     Asked on 3/11/2018by Sean

If I installed this transformer to my existing light which is 300 watts could I then use a lower wattage bulb?

A  Answered on 3/12/2018 by InyoPools Product Specialist Lennox H.

Hi, Sean. Yes, you can use a 100 Watt 12v bulb if one is available for your fixture or else you will have to replace the entire fixture. 

?     Asked on 8/18/2017by 2 questions: Compatibility and Future-Proofing

I have to 120V pool lights (2) that I want to convert to 12V to then install LEDs. Are there any transformer compatibility issues with these transformers and the LED drivers of different manufacturers? Also any reason not to spend the extra few $ to buy the 300W transformer to future proof i.e. when higher wattage LED pool lights are released?

A  Answered on 9/21/2017 by InyoPools Product Specialist Lennox H.

Hi. There is no compatibility issue with these Intermatic transformers and pool light. I would recommend getting the 300W unit because of its load capacity. 

?     Asked on 10/7/2016by MIKE NEUMANN

Is this transformer designed to be switched on and off? Or should the light switch be on the 12vdc side? Just wondering if anyone has had problems with the inrush current of the transformer? The reason I'm concerned is because the LED light I was looking at requires power to be switched on and off to change the color/light show.

A  Answered on 10/12/2016 by InyoPools Product Specialist Scott W.

Turning the light on and off as well as changing the colors is going to be done by switching the light switch on and off, the transformer does not have the switch for that.

?     Asked on 8/31/2016by Tony

Does it come with a built in timer?

A  Answered on 8/31/2016 by InyoPools Product Specialist Stacey M.

Hello Tony, this is just the transformer there is no timer.

?     Asked on 10/16/2013by Guest

How much does this weight?

A  Answered on 10/16/2013 by InyoPools Product Specialist Patrick P.

This tranformer is about six(6) pounds.

?     Asked on 12/16/2006by Guest

I am going to purchase two 12 Volt lights do I need to purchase a transformer with these lights?

A  Answered on 12/16/2006 by InyoPools Product Specialist Patrick P.

The power coming from your house is 120V so you will need to purchase a transformer to drop the voltage from 120V coming from your house down to 12V going to the pool light. We sell two transformers the PX100 which can handle up to 100 watts and the PX300 which can handle up to 300 Watts. You may also put multiple lights on one transformer, for example if you had two 50 watt lights then you would only need to purchase one PX100 transformer and wire both lights into this single transformer.

?     Asked on 6/5/2006by Guest

Is is this transformer weather proof?

A  Answered on 6/5/2006 by InyoPools Product Specialist Patrick P.

Yes the Intermatic transformer is weather proof.


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