The SNCAO 200, sometimes written as CAO.200, was a French single-seat fighter aircraft prototype of the 1930s.

In 1937, the French Air Ministry issued an official specification for a single-engined fighter to follow-on from and replace the Morane-Saulnier M.S.406.

The new fighter, the SNCAO 200 was a low-winged monoplane of all-metal construction, with stressed-skin wings, a forward fuselage of steel tubes covered in duralumin skinning, and a duralumin monocoque rear fuselage.

[3] With this engine, the SNCAO was underpowered, and by the time the prototype was passed to the authorities for official testing in August 1939, the Dewoitine D.520 had already been ordered into large-scale production.

[9][10][11] Data from The Complete Book of Fighters[8]General characteristics Performance Armament