Terminal temperature specifications enable even higher power

WK73R/WK73S

KOA's WK73R/WK73S which are wide terminal type flat chip resistors have a structure with large electrodes for excellent heat dissipation and can apply higher power compared to short-side electrode resistors of the same size.
It is now possible to guarantee even higher power ratings by applying terminal temperature regulations and reviewing the specifications to WK73R/WK73S.
As a result, the series has accomplished higher rated power in all sizes from 0204 inch to 1225 inch, including a guaranteed maximum rated power of 4 W in the 1225 inch size(WK73S).

The category power enables high power application even at high temperatures and power can be applied up to
0.833 W at 155°C in the 0508 inch size(WK73S).Compared to general-purpose chip resistors (RK73 series),
it contributes to downsizing of circuits and reduction in the number of components. AEC-Q200 Tested.

(Applications)
Car electronics, power supply, industrial equipment, etc.
Contact KOA sales for details.

Design Support Data of WK73R

Design Support Data of WK73S

Setting of category power and
expanded rated power based on terminal part temperature specification

《Case of 0508 inch size low ohm WK73S2A》

ーPrevious spec

ー New spec : Revised rated power

Category Power : Maximum power that can be applied at maximum operating temperature