I went over to the Newark Electronics site (the USA site for Element14). They are only collecting information for 'registering an interest', but I saw this:
"By providing your contact details you are agreeing for your details to be used for marketing purposes by companies within the Premier Farnell Group."
Both phone number and email are required. I have no problem providing that for an order to be placed, but I am not going to agree to be spammed by email and phone for marketing.