Direct current transformer

DC transformers are specially designed for LED lighting with an input voltage of 12 or 24 volts. These are electronic transformers and are also referred to as LED drivers, LED ballasts or LED power supplies. They convert the house voltage of 230V, which is present in the German power grid, into the 12V AC (alternating voltage) required for the operation of the LEDs. This is the only way to ensure the correct function and long service life of LED lamps or LED lamps without an integrated rectifier, since they would only glow or burn out directly if connected to 230V. Depending on the area of application, direct current transformers are available as "Trafo Indoor" (indoor area), "Trafo Outdoor" (waterproof for outdoor use with protection class IP65 or IP67) or as "Transformer for DIN rails" for placement in fuse boxes.

Topangebot 12V/24V Transformers for DIN Rail 35mm | Control Transformer from 13.19
 
available
Topangebot LED transformer WTN-D 12V | power supply for LED lighting from 7.49
 
available
Topangebot LED transformer round 0.5-12W | 230 Volt to 12 Volt 9.69
 
available
Topangebot LED transformer/driver | 12-80W | 220-240V/12VDC | indoor from 10.59
 
available
Topangebot Slim LED transformer | 12V/24V | 6/12/15/20/30/50W | indoors from 14.99
 
available
Topangebot LED transformer 230V to 12V | LED transformer for indoor use from 9.99
 
available
Super SlimLine-Trafo WTN-FLAT | LED power supply from 11.99
 
available
LED transformer 12V, 0-10/15W | Ø55mm for flush boxes from 13.19
 
available
Electronic halogen transformer 12V AC 10-105/120W from 12.99
 
available
Topangebot Mean Well LED trafo | 12V | water resistant | 18/36/60W from 13.59
 
available
LED transformer 230V to 12V | 12 Volt  transformer indoor from 9.99
 
available
LED transformer 12V DC | 100/200/300W | transformer 12V LEDs from 18.49
 
available
LED power supply 12V/15W, foot switch, transformer 9.99
 
available
LED transformer 12V DC | 6/12/20W | EVG trafo for LEDs from 9.99
 
available
12W LED transformer - round -, max. 1A 12V DC, Trafo 9.99
 
available
LED transformer SUPER SLIM | 20/50W | 12V, 1.67-4.2A from 17.39
 
available
Topangebot LED transformer 20/30/50/100W | 12V DC, 85~264V | IP65 from 14.39
 
available
Topangebot LED transformer 20W Driver, 12V DC, IP67, trafo 13.99
 
available
LED transformer, secondary dimmable, 1-45W, 12V DC, IP40 54.79
 
available
LED transformer | 0-15W | 12V DC | for inside 10.79
 
available
Topangebot Mean Well LED transformer, 24V 0,75A/18W,  IP67 from 12.19
 
available
LED transformer | 150W | 12V DC | IP20 20.69
 
available
Topangebot Flat-Slim LED transformer 12V | ballast extra flat 12 volts from 7.29
 
available
12V transformer for DIN-rails, max.54W/ 0-4,5A 37.59
 
available
LED transformer 24V DC | 3.75A / 90W | IP67 61.89
 
limited stock
Universal bell transformer for DIN rail | 230V to 8V/ 12V from 24.99
 
available
Neuheit Slim-Long LED trafo, LED power supply, super flat LED driver from 41.29
 
available
LED transformer | 60W | 12V DC | not dimmable 20.49
 
available

Comparison of direct current transformer and electronic ballast (EVG)


Halogen lights often already have an electronic ballast (EVG). If these are to be exchanged for energy-saving LED lamps, the question often arises as to whether the existing transformer must be exchanged. Electronic ballasts require a minimum load for operation so that the output voltage levels out exactly. While this is negligible for halogen lamps and does not limit functionality, voltage spikes with LED lamps can cause them to just glow, hum, flash or burn out immediately. In order to be able to enjoy the new LED lighting for a long time, existing electronic ballasts (EVG) should always be replaced with LED direct current transformers.

 

How is the correct power of the LED transformer determined?


To determine the correct power of the required LED transformer, in addition to the total power of the LED lamps to be used, a reactive power of at least 30% (comes from the mains and flows back there again) must be taken into account.

In order to determine the total output of the LEDs, the individual output of each LED light source must be added up. If, for example, 6 lamps with 3 watts each are to be used, this results in a total output of 18 watts. The reactive power of 30% results in 6 watts and therefore an LED power supply unit with at least 24 watts is required. If a more powerful LED ballast is used, the LEDs can be expanded in the future or replaced with lamps with a higher output.

* all prices including VAT and excluding shipping cost; minimum order 10 euros
** Valid for deliveries for standard shipping within Germany. Delivery times for other countries and information on the calculation of delivery, see here.
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