pf2200 series ? to-220 housing ? rated power to 50 watts ? resistances from 0.02 to 51k ohms ? high stability film resistance elements ? resistance tolerance to 0.1% ? tcr to 5ppm/c ? low inductance ( <10nh ) ? isolated mounting tab specifications 1 power rating based on 25c flange temperature 2 power rating based on 25c ambient temperature 3 consult factory for higher or lower values type power rating heatsink 1 free air 2 thermal resistance resistance range 3 min max tolerances temperature coeffcients pf2205 50w 1w 2.3c/w 0.02w 51kw 1% ( r 0.1 w ) 5% 50ppm/c ( r 10 w ) 100ppm/c ( 0.1 w r < 10w ) 250ppm/c ( r < 0.1 w ) pf2203 35w 1w 3.3c/w 0.02w 51kw 1% ( r 0.1 w ) 5% 50ppm/c ( r 10 w ) 100ppm/c ( 0.1 w r < 10w ) 250ppm/c ( r < 0.1 w ) pf2202 20w 1w 5.9c/w 0.02w 220w 1% ( r 0.1 w ) 5% 50ppm/c ( r 10 w ) 100ppm/c ( 0.1 w r < 10w ) 250ppm/c ( r < 0.1 w ) 10w 1w 220w 51kw 1%, 5% 50ppm/c pf2201 10w 0.5w 3.3c/w 1w 51kw 0.1% 5ppm/c ( r 5 w ) 25ppm/c ( r < 5 w ) to-220 power thin film resistors part description: part type - resistance - tolerance - tcr example: pf2203 0.5 ohm 1% 100ppm ordering information riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 07/13
specifications (continued) specifcation value maximum current 25a temperature range -55c to +155c : pf2202, pf2203, pf2205 -55c to +120c : pf2201 dielectric strength 2000 vac max. operating voltage * p r ( 500v max ) insulation resistance >1000 meg-ohm inductance <10nh ( at the standoff ) environmental performance dr test conditions load life 1% + 0.05 w 25c, 90 min on, 30 min off, 1000 hr humidity resistance 1% + 0.05 w 40c, 90-95% rh, dc 0.1w, 1000 hr temperature cycle 0.25% + 0.05 w -55c for 30 min, +155c for 30 min, 1000 hr solder heat 0.1% + 0.05 w +350c, 3s vibration 0.25% + 0.05 w iec60068-2-6 mounting notes - the pf2200 series thin film resistors must be attached to a suitable heatsink. mount resistor using thermal grease to a clean, fat surface. use a compression washer to provide 150 to 300 pounds ( 665 to 1330n ) of mounting force. torque mount - ing screw to 8 in-lbs ( 0.9 n-m ). mounting tab is isolated from both pins. pf2200 series to-220 power thin film resistors -25 0 25 50 75 100 125 150 175 0 20 40 60 80 100 120 power ( % ) backplate temperature (c) power derating curve pf2201 all others power rating notes - the pf2200 series thin film resistors must be attached to a suitable heatsink. without a heatsink the maximum power rating is 1w ( 1/2w for the pf2201 ). the maximum internal resistor temperature is 155c ( 120c for the pf2201 ). to specify an appropriate heatsink use the following formula : where: r qh = thermal resistance of heatsink ( c/w ) r qr = thermal resistance of resistor ( c/w ) t max = maximum temperature of resistor ( c ) t a = ambient temperature of heatsink ( c ) p = power through resistor ( w ) ( * ) r p t p r t h ma x r a = - - h h riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 07/13
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