FLH-T 250 / 400

Heater with integrated thermostat

Pfannenberg heater line with integrated thermostat. This line has been specifically developed for demanding environments, especially wind turbines and for use in the telecommunications sector.

  • all tests were conducted according to European Norms, EN 60068-2-6 / 60068-2-27 / 60068-2-29 Railway applications – Rolling stock equipment – Shock and vibration tests and therefore are unique to the industry
  • can be used under extreme conditions (–40 °C … +70 °C)
  • fan design with ball bearing: guaranteed long service life
  • voltage range: 230 V / 115 V / 50/60 Hz

DIN rail mounting

extreme T conditions

integrated thermostat

UL recognized for USA

Technical data

DataFLH-T 250FLH-T 400
Heating performance (Ta = +20 °C)250 W400 W
Degrees of protection according to EN 60529IP 20
Operating temperature–40 … +70 °C / –40 … +158 °F
Storage temperature–40 … +70 °C / –40 … +158 °F
Type of mounting4 x M5 screws (not included)

Further technical details and dimensions can be found in the download section on this page under product sheet.


Description Type Size
Conformity FLH_250-1000 pdf 57 KB Download
Manual FLH-T pdf 570 KB Download
Description Language Type Size Download

Product sheet

  • English
pdf 500 KB Download

3D-model (STEP)

  • English
zip 2.6 MB Download

EAC certificate

  • Russian
pdf 610 KB Download

Ordering details

Ordering detailsFLH-T 250FLH-T 400
230 VArticle number1702531000717040310007
115 VArticle number1702531500717040315007

Article numbers for other types on request.

Product Benefits

  1. 1

    Heat distribution

    The fan and the powerful heat output ensure quick and even distribution of heat.

  2. 2

    Long life

    and robust construction with integrated fan which supports the natural convection.

  3. 3


    Integrated snap fastening for 35 mm DIN-rail.

  4. 4


    Predominantly used in larger control cabinets for the avoidance of low temperatures or high relative humidity.

  5. 5

    Electrical connection

    via plug terminal connector.