The DTM70 measures 120 x 52 x 31mm and is available with 12V, 15V, 18V, 24V, 36V or 48V output
The DTM160 measures 150 x 70 x 38mm and is available with 12V, 24V, 36V or 48V output
Both series are available in Class I versions with input protective earth terminal and Class II versions with double protection isolation
Source: electronicsweekly.com