rev. 03/2006a uw series resistances from 0.01 to 91kohms tolerance to 0.01% low temperature coeffcient power rating to 15watts all welded resistance element non-inductive windings are available flameproof inorganic construction ? ? ? ? ? ? ? specifications type power rating w @ 70c resistance 1 range l 0.04 [1.0] h 0.04 [1.0] hs 0.04 [1.0] w 0.015 [0.4] d 2 0.015 [0.4] uw-2 2 0.01 to 22k 0.700 [17.8] 0.245 [6.2] 0.300 [7.6] 0.255 [6.5] 0.032 [0.8] uw-3 3 0.01 to 22k 0.875 [22.2] 0.312 [7.9] 0.375 [9.5] 0.312 [7.9] 0.032 [0.8] uw-5 5 0.01 to 45k 0.875 [22.2] 0.375 [9.5] 0.437 [11.1] 0.375 [9.5] 0.032 [0.8] uw-10 10 0.01 to 65k 1.875 [48] 0.375 [9.5] 0.500 [12.7] 0.375 [9.5] 0.040 [1.0] UW-15 15 0.01 to 91k 1.875 [48] 0.500 [12.7] 0.625 [15.9] 0.500 [12.7] 0.040 [1.0] 1 for non-inductive windings / divide maximum resistance by 2 2 lead diameter: 18 awg = 0.040 / 20 awg = 0.032 for non-inductive windings / insert the letter n ( i.e. uwn-5 ) part number - resistance - tolerance - tcr ( if not standard ) example: uw-5 100 ohm 1% ceramic wirewound resistors ordering information willow technologies ltd. shawlands court, newchapel road, lingfield, surrey, rh7 6bl, united kingdom. + 44 (0) 1342 835234 + 44 (0) 1342 834306 info@willow.co.uk http://www.willow.co.uk
rev. 03/2006a specifcation value tolerances 0.01% to 10% ( 1% standard ) temperature coeffcient >10 w : 20ppm/k 1 w to10 w : 50ppm/k <1 w : call factory temperature range -55c to +275c dielectric strength 1500 vac constuction centerless ground ceramic core tinned copper or copperweld leads high temperature / inorganic potting compound all welded terminations environmental performance (mil-std 202) d r dielectric 0.2% + 0.05 w load life 1% + 0.05 w storage 0.2% + 0.05 w moisture resistance 0.2% + 0.05 w thermal shock 0.2% + 0.05 w 5x overload ( 5s ) 0.2% + 0.05 w shock 0.1% + 0.05 w vibration 0.1% + 0.05 w specifications (continued) 0 50 100 150 200 250 300 350 0 20 40 60 80 100 120 power ( % ) ambient temperature (c) power derating curve uw series ceramic wirewound resistors willow technologies ltd. shawlands court, newchapel road, lingfield, surrey, rh7 6bl, united kingdom. + 44 (0) 1342 835234 + 44 (0) 1342 834306 info@willow.co.uk http://www.willow.co.uk
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