A 2009 extension to the TO-220 style TBH series installs metal foil FCSL technology as the resistive element providing a 100 parts per million TCR and values as low as 0.03 ohms. The TK series utilizes four 2512 chip resistors in parallel to achieve low values, and a low cost alternative to conventional TO-220 style resistors. The TCH series contains thick film construction and gives the user increased thermal efficiencies for a maximum power rating of 35 watts. Applications requiring even more power can move to up the TGHG series in the SOT-227 package. This series features power ratings up to 100 watts and resistance values as low as 0.0005 ohms in a convenient 4-terminal design.