Source: fr.wikipedia.org
BB 25200
Vehicle type:
Registration country:
Railway companies:
1965
The BB 25200 is a class of French dual-voltage
electric locomotives built for the SNCF to operate seamlessly under both
1'500 V DC and 25 kV 50 Hz AC overhead power systems. These
versatile locomotives were key performers on mainline passenger
services from the mid-1960s until their retirement in 2012. 
Designed by engineer André Jacquemin and constructed by Matériel de Traction Électrique (MTE), the BB 25200 class was introduced to fill the role of a high-speed dual-voltage locomotive, combining the best features of the earlier BB 9200 and BB 16000 classes. It represented a further step in the SNCF’s strategy to unify traction capabilities across different electrification systems. 
A total of 51 locomotives were built between 1965 and 1975, with additional units converted later from the BB 25150 series to expand the class. 
Design & technical features:
• Dual-voltage operation: Designed to draw power from both 1 500 V DC and 25 kV AC catenaries for flexible operation across the French electrified network. 
• Wheel arrangement: Bo’Bo’ configuration for stable high-speed running. 
• Power & performance: Rated at approximately 3 400 kW under DC and 4 130 kW under AC, with a top speed of 160 km/h. 
• Operational flexibility: Many units were later equipped with push-pull (reversible) controls to handle commuter and regional trainsets, especially in the Rhône-Alpes region. 
BB 25200 locomotives were initially deployed on long-distance express services, including routes where electrification changed between DC and AC, such as Paris - Le Mans - Rennes. They later appeared on a wide variety of passenger runs across France, from Paris connections to regional services and Paris - Lyon / Aix-les-Bains traffic. 
During the 1980s, selected units were modified to Class BB 25200R with push-pull gear for efficient commuter service. These modernized locomotives served into the 2000s until the class was fully retired from regular revenue service by 2012. 
Designed by engineer André Jacquemin and constructed by Matériel de Traction Électrique (MTE), the BB 25200 class was introduced to fill the role of a high-speed dual-voltage locomotive, combining the best features of the earlier BB 9200 and BB 16000 classes. It represented a further step in the SNCF’s strategy to unify traction capabilities across different electrification systems. 
A total of 51 locomotives were built between 1965 and 1975, with additional units converted later from the BB 25150 series to expand the class. 
Design & technical features:
• Dual-voltage operation: Designed to draw power from both 1 500 V DC and 25 kV AC catenaries for flexible operation across the French electrified network. 
• Wheel arrangement: Bo’Bo’ configuration for stable high-speed running. 
• Power & performance: Rated at approximately 3 400 kW under DC and 4 130 kW under AC, with a top speed of 160 km/h. 
• Operational flexibility: Many units were later equipped with push-pull (reversible) controls to handle commuter and regional trainsets, especially in the Rhône-Alpes region. 
BB 25200 locomotives were initially deployed on long-distance express services, including routes where electrification changed between DC and AC, such as Paris - Le Mans - Rennes. They later appeared on a wide variety of passenger runs across France, from Paris connections to regional services and Paris - Lyon / Aix-les-Bains traffic. 
During the 1980s, selected units were modified to Class BB 25200R with push-pull gear for efficient commuter service. These modernized locomotives served into the 2000s until the class was fully retired from regular revenue service by 2012. 
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Latest update on the 6th of January 2026 at 14:18
Contributor(s): Tudor C.
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