FLZ 541 – FLZ 543

Twin thermostats

The FLZ series of twin thermostats integrates two independently switchable thermostats. They are available with N.C./N.O., N.C./N.C. and N.O./N.O. contacts. Unlike thermostats with changeover contacts, connected devices can be switched in different temperature ranges.

N.C./N.O. spring contact (FLZ 541)

N.C./N.C. spring contact (FLZ 542)

N.O./N.O.spring contact (FLZ 543)

UL approved

Technical data

DataFLZ 541FLZ 542FLZ 543
Setting range0 … +60 °C / +32 … +140 °F
Type of contactN.C. / N.O. with spring contactN.C. / N.C. with spring contactN.O. / N.O. with spring contact
Switching temperature difference<7 K
Switching point tolerance±4 K
Max. switching power valueN.C.240 V AC / 10 (2)
N.O.120 V AC / 15 (2)
DCmax. 30
Operating temperature range–40 … +80 °C / –40 … +176 °F
Storage temperature range–40 … +80 °C / –40 … +176 °F
Suitable for the operation offan and heaterheatersfans
Type of mountingsnap fastening for 35 mm profile bars according to EN 60715

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


Description Type Size
FLZ 541 THERMOSTAT O/S 0..60C pdf 44 KB Download
FLZ 541 THERMOSTAT O/S 0..60C pdf 30 KB Download
Manual FLZ 520/530 54x pdf 430 KB Download
Description Language Type Size Download

Product sheet

  • English
pdf 230 KB Download

3D-model (STEP)

  • English
zip 1.8 MB Download

EAC certificate

  • English
pdf 620 KB Download

UL certificate

  • English
pdf 220 KB Download

Ordering details

Ordering detailsFLZ 541FLZ 542FLZ 543
Article number171410000001714200000017143000000

Article numbers for other types on request.

Product Benefits

  1. 1

    The FLZ series

    twin thermostats integrate two independently switchable thermostats. They are available with normally closed/normally open and normally open/normally open contacts.

  2. 2

    In combination

    with filterfans, they provide for additional savings on energy, materials and time and – for a better environmental balance.

  3. 3

    Using thermostats

    you can achieve greater reliability in the production process, reduced energy consumption due to need-based use and an improvement in the efficiency of the controlled heaters and filterfans.

  4. 4

    In combination

    with control cabinet heaters they regulate the temperature inside the control cabinet.

  5. 5

    Electrical connection

    using screw terminals, and fast snap fastening on DIN rail.