By Intermatic
Part # 3571-10
Manufacturer Code 119T340
Intermatic 300W Transformer – 119T340
120V Primary | 60Hz | 300-Watt Output
✅ Reliable Power for Pool & Landscape Lighting Systems
The Intermatic 119T340 Transformer is a durable, high-performance 300-watt transformer designed for use in pool, spa, and landscape lighting systems. With a 120V primary input and heavy-duty construction, it ensures consistent and safe low-voltage power distribution for underwater lights and outdoor fixtures.
Product Features
✅ High-Capacity Output
➡️ 300-watt transformer handles multiple lighting loads
➡️ Suitable for pool, spa, and landscape lighting systems
✅ Standard Input
➡️ 120V, 60Hz primary voltage input
➡️ Compatible with typical residential power supplies
✅ Durable Design
➡️ Rugged construction for outdoor environments
➡️ Built for long-term performance and safety
Specifications
| Feature | Detail |
|---|---|
| Part Number | 119T340 |
| Power Output | 300 Watts |
| Input Voltage | 120V AC |
| Frequency | 60Hz |
| Brand | Intermatic |
| Application | Pool, Spa, Landscape Lighting |
Installation Notes
✅ Easy Integration
➡️ Designed for standard lighting systems
➡️ Use with Intermatic control systems or standalone installations
⚠️ Professional installation recommended for compliance with local electrical codes and to ensure safe operation in wet environments.
Is there a wiring diagram for Intermatic part number 119T340?
Reply
Click here for the wiring diagram.
Reply
will this replace old model 119t252 actown 120/12 volt 300 va transformer?
Reply
Hi Pete, As long as the 119T252 was 300 watt than this will be a direct replacement. The 119T340 is the same as the one which is in a PX300 transformer. It may be less expensive and more readily available by just getting the PX300 transformer.
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what's the difference between the Intermatic Transformer - 300 W, 120 V, 60 Hz - 119T340 and the Intermatic px300
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What could be the reasons the fuse keeps getting burned out... replaced fuse previously... one week later the fuse blew in the transformer again... could this be a current issue or just a old transformer (purchased in 2007).
Reply
Hi, Kelvin. The main reasons are high voltage or load, incorrect wiring including crossed wires. Test the voltage coming into the transformer and feeding the fuse.
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Less than 1 hr
Screwdriver, black tape
1 0
This was a very simple replacement. Turn off the breaker, Open up the Intermatic enclosure. Remove the two screws that hold the transformer in place. Remove the wire nuts and simply match wires. Also there are instructions that come with the transformer, and you can select different input wires to affect the output voltage in case of voltage loss. Replace the screws and turn on. Easy. I replaced my old transformer because it was buzzing and my LED light quit working so I was afraid that the output voltage was "Noisy' and prohibiting the LED light from working. The new transformer is actually much, much noisier.......and the led light that I got from here 2 years ago is just shot....only makes a dull green light. ;-)
2 to 4 hrs
Screwdriver, Nut Drivers, Wire nuts
2 0
A lightning strike zapped our transformer and pool lights (and much more). This was easy to replace. Turn off power to pool sub-panel. Remove breaker cover. Disconnect white wire from neutral bar. Disconnect 12/13/14 volt wire-whichever one you are using-from switch leg. Disconnect wires to pool lights. In my case, I removed metal covers and unscrewed transformer from back of panel. Screw new transformer to panel. Attach white wire to neutral bar. Connect 12/13/14 volt wire-whichever one you are using-to switch leg for lights. In my case, I have 2 lights, so I attached one wire to both black wires for lights, and the other wire to the white wire for lights. Re-install metal covers for transformer. Re-install breaker cover. Re-energize panel. Turn on lights, and Bingo!!, Bob's Your Uncle
