Eventually, 5 of these versions entered mass-production : - Potez Po-630C.3, a three-seat fighter powered by 2 Hispano-Suiza 14AB-02/03 or -10/11 radial, rated at 650 hp or 700 hp engines and armed with two fixed forward-firing 20 mm cannons plus a rear-firing 7.5 MAC machine gun ( initially was destined for night fighter units, but some planes were sent to single-seat fighter units to act as avions de commandement, meaning command aircraft for single-seat fighters ) ; Potez Po-631C.3, a dedicated three-seat fighter, powered by 2 Gnome-Rhône 14M-4/5 or -6/7 radial, with the same armament ; Potez Po-633B.2, a light bomber, pretty much similar to the 631C.3, but with a glazed lower nose where the bombardier stood , and an internal bomb bay where eight 50 kg bombs positioned vertically could be carried ; Potez Po-637A.3, a three-seat reconnaissance and army co-operation version, fitted with a glazed observation gondola and a Labrely F.20, F.30 or F.50 camera with up to 40 marker flares in the rear furselage, as well as two 50 kg bombs underneath the wings ; Potez Po-63.11A.3, the final army co-operation and reconnaissance version.

The ARR became interested by the Po-633B2 in 1937, and in the spring of 1938 an order for 20 modified planes was placed. Changes consisted in fitting electrically operated Ratier propellers, inertia engine starters, and provision for a Labrely F.30 or F.50 reconnaissance camera in the weapons bay. Defensive armament was changed as well : 3 Browning FN 7.92 mm machine guns were mounted, one fixed forward-firing, one
rearward-firing in the rear cockpit and one rearward-firing in a new ventral hatch position. In 1939, all 20 Po-633B2's arrived in Romania, where they were assigned to the 74th and 75th Bomber Squadrons of the 2nd Bomber Group. Afterwards, 20 more airplanes were ordered but it seems that only 1 was delivered, as the rest were embargoed by the French, and pressed into service with their own air force.

At the start of operation Barbarossa, 17 Po-633B2 were standing by ready for action. They did a pretty good job, but took heavy losses from AA fire, so after just one month the 75th Bomber Squadron handed in all its remaining planes to the 74th Squadron. After participating in the siege of Odessa, the 74th had been reduced to 5 operational Po-633B2's. In late 1941, 9 more Po-633's were received from Vichy France in exchange for various oil products. Most were assigned to the 74th Bomber Squadron ( they had 9 Po-633's when they were sent to the east front ) but it seems that some were given to the 3rd Long Range Recon Squadron as well. Both units took part in the Stalingrad campaign, but were pulled out of action and sent home by early 1943. Afterwards, surviving aircraft were used as trainers for night fighter pilots. Generally, the Po-633's achieved a good combat reputation, mainly for its good handling and good survivability, being able to take considerable damage and still make it back home.