The New South Wales H sets, commonly referred to as the OSCAR (Outer Suburban Car) trains, are a class of electric multiple units (EMU) currently operated by Sydney Trains on its intercity routes and some Sydney suburban routes.

There are many similarities between the H sets and the M sets, including improved external destination boards, internal destination boards displaying stopping patterns, Digital Voice Announcements, security cameras, and green target plates.

This feature is aimed at preventing incidents where passengers may fall from the carriage when stopped at a short platform.

Instead of the entire body being of the same design, like the Tangara, the driver's cab is built like a protective cage, made of fibreglass and supported by a box section steel frame, which stretches to the end of the guard's door.

The rest of the train is made from conventional stainless steel.The initial order was for 41 cars and the contract was awarded in February 2003.

[4] The OSCARs were late in starting service as CityRail wanted to test the trains thoroughly after the M sets had a troubled introduction.

On 5 August 2006, set H3 was opened for inspection to the public, as part of Central station's Centenary celebrations.

H sets were the first rolling stock to be used on the Epping to Chatswood railway line, operating a shuttle service from 23 February 2009 to 10 October 2009.