RCD's products are available in a RoHS-compliant version by
specifying termination finish 'W' at the end of RCD's part
number (e.q . 155-1001-FTW). Most products are also available
with a Tin-Lead termination finish by specifying termination "Q"
at the end of the p/n (e.g . 155-1001-FTQ). The 'W" finish is
100% Tin on most products , as is popular in the commercial
sector. The "Q" finish is SnPb (typically 10-50% Pb depending
on product), as is popular in the military and aerospace industries.