Electrohydrostatic actuators (EHAs) integrate a self-contained hydraulic circuit — comprising a variable-speed electric motor, fixed-displacement pump, and hydraulic cylinder — into a single power-by-wire (PBW) unit, eliminating dependence on a centralised hydraulic supply. EHAs are employed in flight control surface actuation, landing gear, and thrust reverser systems, with designs typically incorporating brushless DC motors, electrohydrostatic pump assemblies, and integrated position feedback via LVDT sensors.
How many distinct aircraft programmes each supplier in this area is linked to in our database — a proxy for how widely established a company is across the industry. Bars are relative to the top-ranked supplier.
Whether supply here is concentrated in a few big players or spread across many. Top-5 share is the portion of all programme links held by the five largest suppliers. HHI (Herfindahl–Hirschman Index) runs 0–10,000: under ~1,500 is competitive, over ~2,500 is concentrated.
Where the listed suppliers in this area are based, by country of head office. Useful for sourcing, near-shoring and understanding regional strengths.