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 42 KB Download
Conformity_UKCA_085507008_Rev01_Mar24_FLH_PFH_250-1200.pdf pdf 31 KB Download
Manual FLH-T pdf 690 KB Download
Description Language Type Size Download

Product sheet

  • English
pdf 500 KB Download

3D-model (STEP)

  • English
zip 2.6 MB Download

UL recognized certificate

  • English
pdf 180 KB Download

EAC certificate

  • Russian
pdf 930 KB Download

Further software tools for digital product integration into your planning and documentation (such as Eplan macros) can be found at MyPfannenberg.

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

    High volume flow

    created by the powerful fan means a quick and even distribution of heat.

  2. 2

    Long life

    Fan design with ball bearing guarantees long service life.

  3. 3

    Electrical connection

    via 2-pole terminal strip.

  4. 4

    All tests

    were performed according to European Norms; EN 60068-2-6 | 60068-2-27 | 60068-2-29 Railway applications | Rolling stock equipment | Shock and vibration tests.

  5. 5


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

  6. 6

    Integrated thermostat

    regulates the operation of the heater automatically. Therefore provides safe protection against condensate forming or energy waste.

  7. 7

    Specifically developed

    for demanding environments, e.g. wind turbines and telecommunications sector.