Lighting Ballasts

A lighting ballast helps to safely start and operate lamps such as HID and fluorescent lamps. They provide it with the correct voltage for start-up and the running of the lamp.

How do they work?

Without a ballast to limit it is current, within seconds a fluorescent lamp would overheat and burn out. The ballast briefly supplies high voltage to establish an arc between the two lamp electrodes. Once the arc is established, the ballast quickly reduces the voltage and regulates the electric current to produce a steady light output. For more information on how it works, you can consult our complete Lighting Ballasts Guide.

Types of Ballasts

The most common types of ballasts are magnetic and electronic, and they come in several start technologies to suit different purposes.

  • Magnetic Ballasts – These ballasts are located inside your light sockets between the plug and the light bulb and the power cable. They convert mains electricity into a correct voltage to start, make sure that you always match the wattage of the ballast to the wattage of the lamp.
  • Electronic Ballasts – These ballasts alter the flow of electricity in the light bulb by using a series of induction coils that are separated from one another. They change the frequency of the electrical current without changing the voltage. While magnetic ballasts in fluorescent lamps work at a frequency of 60 Hz, electronic ballasts greatly increase that frequency of 20000 Hz. This high frequency ensures you will not see the lights flickering and will not hear a buzzing sound.


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Description Price Wattage Number of Lamps Ballast Type Supported Lamp Shape Supported Lamp Type Voltage Rating Dimmable High Frequency Length Width Height Minimum Operating Temperature Maximum Operating Temperature Dimming Protocol
RS Stock No. 781-2920
Mfr. Part No.22185151
BrandTridonic
SGD30.68
Each
units
39 W 1 Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 775-3972
Mfr. Part No.22185213
BrandTridonic
SGD39.09
Each
units
18 W 1 Electronic T8 Fluorescent 220 → 240 V No Yes 230 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 781-2958
Mfr. Part No.22185210
BrandTridonic
SGD60.17
Each
units
80 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 425 mm 30 mm 21mm -25°C +55°C -
RS Stock No. 781-2967
Mfr. Part No.22185211
BrandTridonic
SGD33.11
Each
units
14 W 3, 4 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 873-5076
Mfr. Part No.QT-FIT5 3X14 4X14 / 220-240v
BrandOsram
SGD19.45
Each
units
14 W - Electronic T5 Fluorescent 220 → 240 V No - 280 mm 40 mm 21mm -15°C +50°C -
RS Stock No. 873-5091
Mfr. Part No.QTP-DL 2x55/220-240 GII
BrandOsram
SGD28.61
Each
units
55 W 2 Electronic CFL Compact Fluorescent 220 → 240 V No - 423 mm 30 mm 21mm -20°C +50°C -
RS Stock No. 544-351
Mfr. Part No.PVC035ICDM
SGD35.37
Each
units
35 W 1 Electronic - Ceramic Metal Halide 220 → 240 V No Yes 188 mm 82.7 mm 35mm -20°C +45°C -
RS Stock No. 781-2942
Mfr. Part No.22185152
BrandTridonic
SGD37.11
Each
units
39 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 873-5041
Mfr. Part No.QTP-OPTIMAL 2x54-58
BrandOsram
SGD21.30
Each
units
54 W 2 Electronic T5 Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C -
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