TT Electronics/Welwyn PCF resistors are ideally suited for handling by automatic methods due to their rectangular shape and the small dimensional tolerances. Electrical connection to a ceramic substrate or to a PCB can be made by reflow or wave soldering of wrap-around terminations. Wrap-around terminations provide good leach properties and ensure reliable contact. Due to the robust construction, the PCF can be immersed in the solder bath for 30 seconds at 260°C. This enables the resistor to be mounted on one side of a PCB and wire-leaded components applied on the other side. PCF resistors can operate at a maximum temperature of 125°C. For soldered resistors, the joint temperature should not exceed 110°C. This condition is met when the stated power levels at 70°C are used.
