The EHA is a highly integrated system developed by Thomas to meet the demanding requirements of communal vehicles, concrete pumps, cranes and tractors. It comprises two proportional pressure reducing valves, installed in a housing together with an electronic control unit and a redundant Hall sensor system. The sensor system allows to precisely adjust and monitor the position of the main spool in the customer's system.

A convenient error diagnostics function and a fast software adaptation make the EHA a reliable, flexible and safe control unit. The product can be used up to a Performance Level PL=c according to DIN EN ISO 13849.


Directional spool valves

Strategic Fields

Construction Machinery, Agricultural Machinery, Forestry Machinery, Material Handling, Special Vehicles


Electrohydraulic valves



Interface for implementation of all available standard valves

Functional safety up to a performance level PL=c according to DIN EN ISO 13849



Max volume flow @ 6 bar dp

2,5 l/min  depending on the PPCD04 IPH

Supply Voltage

12 V / 24 V

Supported communication software

CANopen or proprietary bus

Leakage (internal)

< 0,06 l/min (de-energized)
< 0,15 l/min (energized)

EHA 2.0 with IPH



EHA 2.0 with IPH

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