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| riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com page 27 05/16 pcs type pcs resistance range 0.001 to 20 ohm power rating (70c) 3 w power rating with heat sink 40w tolerances: from 0.001 ohm from 0.01 ohm .5% / 1% / 2% / 5% 0.1% / 0.25% / 0.5% / 1% / 2% / 5% thermal resistance 2.0 c/w stability (2000h) 0.1% / 0.2% / 0.5% (depends on stress) temperature coef? cient standard (n) option 1 (m) option 2 (l) upon request for selected values 10ppm/c (20 to 60c) 5ppm/c (20 to 60c)2ppm/c (20 to 60c) other speci? cations upon request isolation voltage 300 vdc max. current 150 a thermal emf < 1v/k operating temperature range -40 to 130c resistor material cumnsn-foil substrate anodized aluminium connector material cu / tinned housing epoxy terminals 4 max torque 0.8 nm specifications part description: part type - resistance - tolerance - tcr pcs 10 ohms 1% 10ppm ordering information ? tcr to 2ppm/c ? 0.001 to 20 ohm ? power rating to 40watt ? resistance tolerances to 0.5% ? very low inductive ? load stability to 0.1% ? package style 2321 4 terminal low tcr current sense resistor applications: ? power modules ? frequency converters ? switch mode power supplies ? current monitoring
riedon inc. 300 cypress avenue alhambra ca 91801 (626) 284-9901 (626) 284-1704 www.riedon.com page 28 05/16 pcs low tcr current sense resistors 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% power rating notes - the pcs 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 : 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 ) dimension mm tol. (mm) inches tol. (inches) a 17.25 0.2 0.68 0.008 b 22.30 0.2 0.88 0.008 c 3.20 0.1 0.13 0.004 d ?3.20 0.1 ?0.13 0.004 e 16.75 0.008 0.66 0.2 f 7.62 0.008 0.30 0.2 g 17.78 0.008 0.70 0.2 h 1.50 0.2 0.06 0.008 i 1.10 0.008 0.04 0.2 j 2.00 0.004 0.08 0.1 k 3.00 0.004 0.12 0.1 l 8.00 0.008 0.31 0.2 m 3.00 0.008 0.12 0.2 n 1.50 0.004 0.06 0.1 o 4.50 0.004 0.18 0.1 p 3.75 0.008 0.15 0.2 q 0.80 0.1 0.03 0.004 r 2.10 0.008 0.08 0.2 r/r (ppm) temperature (c) ( * ) r p t p r t h max r a = - - h h derating dimensions temperature coe cient -2000 -1000 0 1000 2000 +10 ppm/k - 10 ppm/k +5 ppm/k - 5 ppm/k nominal r/r -40 -20 0 20 40 60 80 100 120 140 i u u i i = current u = voltage |
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