This is the part in question, Farnell updated the product code:

http://uk.farnell.com/jsp/search/pro...0&Ntt=118-2340

As it's a diode the polarity is important; the lead not next to the one marked with a dot goes to the tip on the 3.5mm jack plug we use and the centre pin of the 3-pin DIN plug used on the Zone VI. You can just see the dot at the bottom right of the illustration on the Farnell web page.