WK73 from KOA – Wide Terminal Series with New Case Sizes

KOA has now expanded the WK73 series by several case sizes. For the WK73R (resistance values ≥ 10 ohms), three case sizes have been added: 0508, 0306, and 0204. The WK73S (resistance values < 10 ohms) has been expanded to include the 0508 case size. For the 0508 size, the power rating is specified up to 1 watt, for 0306 up to 0.5 watts, and for 0204 up to 0.33 watts. The TCR reaches a maximum of 100 ppm/K, the temperature range is specified as -55 to +155°C, and derating begins at 105°C (terminal temperature). The series meets the requirements according to AEC-Q200.

A total of 7 case sizes are now available in the WK73R series, from 0204 to 1225. In the low-ohm version WK73S, there are 5 case sizes, from 0508 to 1225. The value ranges extend from 10 mOhm to 9.76 ohms (WK73S) and from 10 ohms to 1 MOhm (WK73R). When applying the terminal temperature concept, power ratings of 3 watts (1225), 2 watts (1020), and 1.5 watts (0612) are possible. All case sizes are tested according to AEC-Q200. The entire series is also available in a special anti-sulfuration version, WK73-RT.