Series 20 Reed Relays - General: These dry contact reed relays are designed to be used in through-put holes on a printed circuit board and then wave soldered. The feature that makes them unique is that they can utilize almost any kind of reed switch, as long as it can be inserted into the coil and then sealed totally. Because of this feature, even those switches rated at 50 or above watt switching can be utilized, subject to availability. Magnetic and/or electrostatic shielding is a viable option.