20w to-263 high power surface mount resistors features ?????????????????????? . ? non-inductive, small, 20 watt high power resistor. ? to-263 surface mount package offering a very low thermal resistance. ? small thin package for high density pcb installation. ? rohs compliant. ? suitable for board mounting with either solder or clip. applications ?????????????????? ??? ? high frequency emitter resistors in switching power supplies. ? high precision crt color video amplifiers. ? high frequency snubber and pulse handling circuits. ? pulse generator load resistors . ? in-rush current protection ? bleeder resistors specification specifications subject to change without notice items specification test conditions power rating 20 watt -55 c to 25 c flange temperature power rating 2.25 watt without heatsink thermal resistance 3.3 c/w resistor hot spot to flange resistance range 0.01-0.09 ? 0.1-9.1 ? 10-220 ? up to 51k ? also available nominal resistance series e6 e12 e24 including 2.5 ? and 5.0 ? tcr(ppm/ c) 250 100 50 for -55 c to +155 c tolerance +/-5% +/-1% & +/-5% +/-1% operation temp. range -55 c to+155 c max. operating voltage 500v or r p ? dielectric withstanding voltage. 2000 v dc 60 seconds. load life ? r +/- (1.0% + 0.05 ? ) 25 c, 90 min .on, 30 min. off, 1000 hours. humidity ? r +/- (1.0% + 0.05 ? ) 40 c, 90-95%rh, dc 0.1w, 1000 hours. temp. cycle ? r +/- (0.25% + 0.05 ? ) -55 c,30 min.,+155 c,30 min., 5cycles soldering heat (max) ? r +/- (0.1 %+0.05 ? ) 250+/-5 c, 3seconds, solderability min. 90% coverage 230+/-5 c, 3seconds. insulation resistance over 1,000 meg ? between terminals and tab. vibration ? r +/- (0.25% + 0.05 ? ) notes: 1. electrically isolated metal tab. 2. contact factory for custom products , non-standard values and tolerances. 3. current rating: 25a maximum. 1 dimensions (mm) tolerances +/-0.1 unless otherwise marked 2.0+/-0.5 10.6max 0.5 2.7 1.5 4.5 (15.3) 5.08 1.5 0.75 2.0+/-0.5 3.0+/-0.5 10.3+/-0.5 12.7 2.03 5.08 10.16 17.78 3.81 smhp 10.3+/-0.5 10.6max 1.6+/-0.2 1.4+/-0.2 1.7+/-0.5
fr4 thermal pcb characterisation pad dimensions (x,y mm) p 90 c, 35um (w) 50, 40 4.5 45, 35 4 40, 30 3.5 35, 25 3 20, 10 2 notes: characterisation carried out using 35 m pcb copper pad weights, with the temperature of 90 c used as a maximum reference on the pcb. p 90 c, 35um (w) is power when the measurement point reaches 90 c ordering information smhp 20 500 f model resistance code to lerance smhp 20 20w to-263 high power resistors -50 0 50 100 150 200 flange temperature ( c) 100 80 60 40 20 0 +155 c +25 c % power 0 10 20 30 applied powe r (w) 120 100 80 60 40 20 0 . temperature rise ( c) reel dimension: reel orientation: outer diameter: 300 mm u nits to be orientated with pins facing sprocket holes inner diameter: 100 mm width: 23.9 mm min. 27.4 mm max quantity: 500pcs/reel 5.0 0.4 16.0 4.0 2.0 10.8 16.3 11.5 1.75 24.0 derating curve temperature rise tape dimensions and orientation 2 0.1 ? : 0r100 j = 5% tol 50 ? : 500 first two digits signific ant, last digit: number of trailing zeros f = 1% tol x mm y mm temperature measurement
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