... 25 degree2. T.C.R 1/8w, 1/4ws, 1/4w, 1/2w, 1/2ws, 1ws, 1w, 2ws, 2w, 3ws 350-1000 PPM/°c ... less than 100K, 2% Max. !00K or more .3& Max with no evidence of mechanical damage. Resistance change after ... less than 56K, +/-2% Max. 56K or more, =/-3% Max with no evidence of mechanical damaged. Resistance change after ... 1000H operating at rated voltage with duty cycle of 1.5H ON 0.5H OFF at 70` ...