The SBB Em 3/3 is a diesel shunting locomotive of the Swiss Federal Railways (SBB). They were built between 1959 and 1963, with a total of 41 units being manufactured by the Swiss Locomotive and Machine Works.^[1] They were designed to perform shunting duties for the SBB and were assigned running numbers 18801 to 18841.^{[citation needed]}

Under the SBB they are classified as heavy shunters.^{[citation needed]} Under SBBs later UIC classification system they were designated as being Em 830 class locomotives while being numbered 000 to 040.^{[citation needed]}

• List of stock used by Swiss Federal Railways

• Photos