Electronic ballasts

KST’s range of over 25 types of electronic ballasts for lighting applications  - with T8 or T5 fluorescent lamps – we can meet all your needs as well as all specific standards and technical specifications required and imposed by the railway sector.


Nominal input voltage (VDC) Input voltage range (VDC)
  Min Max
24VDC 16.8VDC 35VDC
72VDC 50VDC 100VDC
110VDC 75VDC 140VDC

General characteristics

  • Low power variation : max 25 % of nominal power
  • Operating temperature : -25° to +70°C (Peak of +85°C – T3 Class in conformity with EN 50155)
  • High number of ignitions (>100.000) – optimal preheating for an increased lamp lifetime
  • High resistance to vibrations and shocks (in conformity with EN 61373)
  • EMC Electromagnetic compatibility  (in conformity with EN 50121-3-2)
  • Fire and smoke approval (in conformity with EN 45545)
  • Conformity to standard railway norms

Protection against

  • Input polarity reversal
  • Open-circuit and low voltage conditions
  • Short-circuit on the ouput terminals
  • Internal short-circuit (fuse protection)
  • Lamp failure

Our different series

CTL serie

Input supply voltage :
DC (24V/72V/110V)

Standard dimensions :
(L) 260 x (W) 64 x (H) 40 mm

CTL T serie

Input supply voltage :
DC (24V/72V/110V)

Standard dimensions :
(L) 195 x (W) 35 x (H) 30 mm

CTL M serie

Input supply voltage :
DC (24V/72V/110V)

Standard dimensions :
(L) 235 x (W) 35 x (H) 30 mm

IRS serie

Input supply voltage :
DC (24V/72V/110V)

Standard dimensions :
(L) 290 x (W) 40 x (H) 36 mm

IRS C serie

Input supply voltage :
DC (24V/72V/110V)

Standard dimensions :
(L) 290 x (W) 40 x (H) 22 mm

All of our products can be tailored to your needs !

General information and technical specification are available on request.

Request of information

Don’t hesitate to contact us via our contact form or on +32 (0) 4 239 73 41 for more specific information and requests.

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KST Lighting

+32 (0)4 239 73 41


Rue du charbonnage 20 - 4020 Wandre



KST Lighting, part of the KST Group, has been active in the railway market for over 35 years, and has always focused on design and the development of innovating, competitive, and reliable products.