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| riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 06/13 fpr 2-t218 precision shunt resistors type fpr 2-t218 resistance range 0.002 to 50 ohms power rating free air 70c with heatsink 2 w 30 w thermal resistance rthj-c 2.5 c/w tolerances from 0.002 ohms from 0.01 ohms from 0.02 ohms 1% / 2% / 5% 0.5% / 1% / 2% / 5% 0.25% / 0.5% / 1% / 2% / 5% stability 0.1% / 0.2% / 0.5% (depends on stress) temperature coeffcient r > 0.2 ohms 15ppm/k (20 to 60c) r 0.2 ohms tcr see table a next page voltage proof 300 vdc thermal emf < 0.1v/c operating temperature range -40 to 130c resistor material cunimn-foil substrate anodized aluminium housing pps connector material cu tinned terminals 2 max. torque 1 nm specifications part description: part type - resistance - tolerance fpr 2-t218 0.068 ohms 0.5% ordering information ? resistances from 0.002ohm to 50ohms ? power rating to 30watt ? resistance tolerances to 0.25% ? tcr to 15ppm/c ? load stability to 0.1% ? to-218 (to-247) housing 0 20 40 60 80 100 120 25 50 85 100 115 130 temperature of the backplate (c) power ( % from nominal power) 0.5% 0.1% 0.2% derating power rating notes - the fpr series resistors must be attached to a suitable heat - sink. the maximum internal resistor temperature is 130c. to specify an appropriate heatsink use the following formula : r q h = t max - ( p x r q r ) - t a p where: r q h = thermal resistance of heatsink ( k/w ) r q 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 )
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 06/13 temperature coeffcient specifications (continued) fpr 2-t218 precision shunt resistors -15ppm/k +15ppm/k nominal ?r/r limit 2 (3) limit 1 (3) temperature (c) ?r/r (ppm) 4000 2000 0 -2000 -4000 -6000 -8000 -20 0 -40 80 140 120 100 60 20 40 100 resistance value (mohm) 5 150 10 200 20 50 2 200 0 250 50 100 tcr - shift (ppm/c) table a dimension mm tol. (mm) inches tol. (inches) a 21.10 0.2 0.83 0.008 b 15.50 0.2 0.61 0.008 c 4.90 0.1 0.19 0.004 d 4.00 0.1 0.16 0.004 e 12.60 0.2 0.50 0.008 f ?3.2 0.1 ?0.13 0.004 g 2.95 0.1 0.12 0.004 h 17.75 0.2 0.70 0.008 i 10.16 0.2 0.40 0.008 j 1.40 0.1 0.06 0.004 k 3.00 0.1 0.12 0.004 l 14.50 0.2 0.57 0.008 m 2.80 0.1 0.11 0.004 n 1.65 0.1 0.06 0.004 o 4.60 0.1 0.18 0.004 p 6.15 0.2 0.24 0.008 q 0.80 0.1 0.03 0.004 r 2.00 0.1 0.08 0.004 dimensions |
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