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SD50
| Production Dates |
November 1984 to May 1985 |
| Total Built |
421 |
| Length |
71 feet 2 inches |
| Engine |
16-645F3B |
| Horsepower |
3,500-3,600 |
| Alternator |
AR16(3,500) AR11(3,600) |
| Traction Motors |
D87Y(3,500) D87A(3,600) |
| Weight |
368,000-394,000 |
The SD50 features 6 door panals below the radiator grills instead of the 8 on the SD60.
SD50F

| Production Dates |
April 1985 to July 1987 |
| Total Built |
60 |
| Length |
71 feet 2 inches |
| Engine |
16-645F3B |
| Horsepower |
3,600 |
| Alternator |
AR11 |
| Traction Motors |
D87 |
| Weight |
390,000 |
The only units built were CN 5400-5459 and they were all CN-design comfort cab and
full-cowl carbody.
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