Instec solder-in filters are multilayer ceramic discoidal capacitors assembled inside of a metal can. Care needs to be taken during installation of these devices not to thermally shock the capacitors. Solder-in filters MAY NOT be plunged directly into a solder pot. If pre-tinning is done to the filter body, DO NOT place the filter directly into cleaning solvent after soldering. Allow for cooling to below 80°C prior to submersing the filters in cleaning solvent.

As is the case with soldering ceramic capacitors, controlling temperature excursions of solder in filters is key. Preheating the component to within 50°C is ideal, when possible. In any case, controlling the rate of heating and cooling to a maximum of 3°C per second is highly recommended. Many times the cooling rate is ignored or forced by fans. Failure to control cooling is just as important as controlling the heating cycle. Low melting point solders, such as 60/40 (Sn/Pb), should be selected for attaching the body of the filter to the chassis as well as for soldering the terminals.

When attaching the filter bodies to the chassis using a soldering iron, use a controlled soldering iron (15-20 watts or less) with a maximum tip temperature of 275°C. Limit the dwell time on the body to 5 seconds maximum.

When attaching wires to the terminals, use of a head-sink is preferred. The heat-sink should be placed close to the body of the filter to limit the heat flow to the capacitor inside. When using a solder iron to solder to the terminals, use a controlled soldering iron (15-20 watts or less) with a maximum tip temperature of 275°C. Limit the dwell time on the lead to 5 seconds maximum.