riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 5/16 ? d-pak foot pattern ? very low pro? le ? resistances from 0.1 ohm to 51kohms ? power rating to 25 watts ? resistance tolerances to 1% ? tcr to 100ppm/c ? isolated back plate PFC series type PFC10 power rating with heatsink 25w ( 2.5w on simple foot print ) short time overload 35 w thermal resistance rthj-c 3.6 k/w resistance range 0.1 - 51k ohms e24+ (includes 2.5, 4.0, 5.0, 8.0, and 16) tolerances (others upon request) 1% / 5% temperature coef? cient 100 ppm/k operating temperature -55c to 155c max operating voltage capacitance 1.44 pf inductance 15 nh withstanding voltage 1500 vac insulation resistance over 1,000 megohm resistor material thick film test conditions results load life 1% 90 min on, 30 min off, 1000 hrs @ 25c humidity 1% 90-95% rh, 0.1w, 1000 hrs @ 40c temperature cycle 0.25% -55c for 30 min, +155c for 30 min, 5 cycles solder heat 0.1% 350c 5c for 3 seconds lead solderability over 95% of surface 230 5c for 3 seconds vibration 0.25% iec60068-2-6 specifications part description: part type - resistance - tolerance PFC10 10 ohms 1% ordering information thick film power smd resistors note: PFC10 can operate 35w rating with back solder pad temperature of 25 c * p r
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 5/16 dimensions PFC seriesthick film power smd resistors dimension mm tol. (mm) inches tol. (inches) a 8.2 0.2 0.323 0.008 b 12.0 0.2 0.472 0.008 c 1.0 0.05 0.039 0.002 d 5.08 0.1 0.200 0.004 e 0.75 0.05 0.030 0.002 f 1.8 0.05 0.070 0.002 g 8.5 - 0.335 - h 8.8 - 0.346 - i 14.1 - 0.555 - j 5.08 - 0.200 - k 2.0 - 0.079 - l 3.8 - 0.150 - note: back solder pad is isolated from both pins. chip construction (exploded view) a c h i l g j d e b f k solder pad layout
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 5/16 derating power rating notes - the PFC series resistors must be attached to a suitable heat- sink. the maximum internal resistor temperature is 155c. to specify an appropriate heatsink use the following formula : where: r h = thermal resistance of heatsink ( k/w ) r r = thermal resistance of resistor ( k/w ) t max = maximum temperature of resistor t a = ambient temperature of heatsink ( c ) p = power through resistor ( w ) heatsink temperature (c) mounting copper insert improves thermal conductivity to heatsink. power ratings of 35w can be achieved through active cooling of the heatsink. for more general information on heatsinking please see our training mod- ule on heatsinking by clicking here. PFC seriesthick film power smd resistors copper insert via-holes plastic tape speci? cations standard package contains 500 pcs/reel, diameter 254mm reel in paper box. digikey package contains 500 pcs/reel, diameter 254mm reel in paper box. power derating curve power ( % ) c c ( * ) r p t p r t h max r a = - - h h
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