A 03 Series train running on the Toyoko Line (Courtesy of Railstation.net)

A 03 Series train with 5 door cars at Shin-maruko Station

Tokyo Metro 03 Series

Operated on the Tokyo Metro Hibiya Line, the Tokyu Toyoko Line and the Tobu Isezaki Line

In Service: 1988 - Present
Top Speed: 110km/h (Service and design)
Acceleration: 3.3km/h/s
Deceleration:
4.0km/h/s (Regular)
5.0km/h/s (Emergency)
Length: 
18100 mm (End cars)
18000 mm (Middle cars)
Width: 2780mm
Consist/Formation:
4 motorized cars + 4 trailer cars (8 cars)
Electric System: 1500v DC through overhead wires
Gauge: 1067mm (Narrow)
Number built: 336 cars

The 03 Series is a three-door commuter-type Electric Multiple Unit developed by the Teito Rapid Transit Authority (Currently Tokyo Metro) to supplement and eventually replace the 3000 Series trains on the Hibiya Line.

The design shares many features with the 05 Series trains which were being designed for the Tozai Line and share some cosmetic similarities. It was designed, built and put into service in just 10 months.

Standard cars have three doors on each side but five door cars were also produced. These cars were designed to shorten the time it takes to get on and off a crowded train.

The first 25 formations used chopper control but formation 26 and on were switched to variable frequency drive using an IGBT element.  

Did you know?
The two design themes that the 03 Series was built around are "High Quality" and "Adult Sense."