Döhler & Haas

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Doehler & Haass Control Systems GmbH & Co. KG is a European manufacturer of command control components.

They make a number of decoders that work with Selectrix SX1 and SX2, as well as NMRA DCC. Many of their products also support Asymmetric DCC.

See their website for more information. Note: Website is in German.


Doehler & Haass has been developing, producing and selling digital components for command control systems since 1975.

As early as 1982, TRIX offered the SelecTRIX system, developed by Doehler & Haass. During this time, Doehler & Haass developed customer-specific ASICs. In 1984 it became possible to produce the world's smallest locomotive decoder availble at the time. Since that time ASIC technology has been further developed.

Doehler & Haass products support all common model railway standards, such as SX1, SX2, DCC, MM, ABC and RailCom. They are not only represented on the market under the name Doehler & Haass, and other manufacturers also incorporate D&H components into their products.

Almost all system components offered are manufactured in Germany.