| BB 63000 | |
| Powertype: | Diesel-electric |
| Builder: | Brissonneau et Lotz |
| Builddate: | 1953–1964 |
| Totalproduction: | 349 |
| Aarwheels: | B-B |
| Uicclass: | Bo′Bo′ |
| Primemover: | Sulzer 6LDA22 |
| Transmission: | Electric |
| Fleetnumbers: | BB 63001–BB 63250 |
The BB 63000 is a diesel-powered centre cab freight shunting locomotive used by French rail operator SNCF. First introduced in 1953, various batches, with increasingly more powerful engines, were built up till 1964. Along with its successors, classes BB 63400 and BB 63500, together totalling over 800 locomotives, it could be found all over France.
The first batch of 72 locomotives, numbered BB 63001–BB 63072, were powered by Sulzer 6LDA22B engines developing . The second batch of 36 locomotives, BB 63073–BB 63108, received the 6LDA22C also rated at . The third batch was introduced in 1959[1] and consisted of 20 locomotives, BB 63109–BB 63128, had the same engine but uprated to . The next 87 locomotives, BB 63129–BB 63195, had the 6LDA22D, rated at . The final batch of 55 locomotives, BB 63196–BB 63250, was introduced in 1962 fitted with the 6LDA22E of . The locomotives were long and weighed .
Further examples were operated in Spain as RENFE Class 307, in Portugal as Class 1200, in Luxembourg as Classes 850/900 and in the former Yugoslavia as Yugoslav Railways Class 642/643.[2] The latter are now operated by Croatian Railways as Classes 2401 and 2402.[3]
Two examples of the class have been preserved at the Chemin de Fer à vapeur des Trois Vallées at Mariembourg, BB 63123 and BB 63149.[4]