irc advanced film division general note irc reserves the right to make changes in product specification without notice or liability. all information is subject to ircs own data and is considered accurate at time of going to print. a subsidiary of tt electronics plc ? corpus christi texas 78411 usa ? irc advanced film division telephone: 361 992 7900 ? facsimile: 361 992 3377 ? email: afdsales@irctt.com ? website: www.irctt.com rc series issue may 2007 standard values e24, e96 preferred any value to order thermal impedance c/watt 110 70 60 ambient temperature range c -55 to +155 general note w elwyn components r eserves the right to make changes in pr oduct specification without notice or liabilit y. all information is subject to we lwyn? s own data and is conside re d accurate at time of going to print. ? w elwyn components limited bedlington, northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 f acsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com we bsite: ww w. welwyn-tt.com 17 3 issue b 03.02 a subsidiary of tt electr onics pl c rc series ? resistance tolerance down to 0.05% ? low noise and negligible voltage coeffcient ? cecc released product with low tcrs over a wide resistance range ? 100% tin plated (pb-free, rohs compliant) leads electrical data rc55 rc65 rc70 notes commercial power rating at 70 c watts 0.25 0.5 1.0 resistance range ohms 1r to 4m 1r to 4m 1r to 10m limiting element voltage volts 350 350 500 isolation voltage volts 500 500 700 tcr (20 to +70 c) & codes ppm/c 5(v), 10(t), 15(y), 25(d), 50(c) & 100(z) see resistance restrictions resistance tolerance % 0.05(w), 0.1(b), 0.25(c), 0.5(d) & 1 (f) approved cecc 40101-004 h j k k l power rating at 70 c watts 0.063 0.125 0.25 0.25 0.5 resistance range ohms 1r to 1m 1r to 1m 1r to 1m 10r to 1m 10r to 1m limiting element voltage volts 200 200 250 250 350 isolation voltage volts 280 280 350 350 500 tcr & codes ppm/c 15(y), 25(d), 50(c) & 100(z) see resistance restrictions resistance tolerance (code) % 0.05(w), 0.1(b), 0.25(c), 0.5(d) & 1(f) approved cecc 40101-804 a b b c power rating at 70 c watts 0.125 0.25 0.25 0.5 resistance range ohms 1r to 1m 1r to 1m 10r to 1m 10r to 1m limiting element voltage volts 200 250 250 350 isolation voltage volts 280 350 350 500 tcr & codes ppm/c 15(t), 25(e) & 50(c) see resistance restrictions resistance tolerance (code) % 0.05(w), 0.1(b), 0.25(c), 0.5(d) & 1(f) precision metal film resistor
rc series issue may 2007 irc advanced film division ? corpus christi texas 78411 usa ? irc advanced film division telephone: 361 992 7900 ? facsimile: 361 992 3377 ? email: afdsales@irctt.com ? website: www.irctt.com precision metal film resistor physical data construction a metal flm is deposited onto a high quality ceramic former. nickel-plated steel caps are force ftted to the former and termination wires are welded to the caps. the resistor is adjusted to value by a helical cut in the flm and the body is protected with a specially formulated epoxy coating. terminations material 100% tin plated over copper wire strength the teminations meet the requirements of iec 68.2.21. solderability the terminations meet the requirements of iec 115-1, clause 4.17.3.2. marking type reference, tcr code, resistance value and tolerance code. the resistance values conform to iec 62. solvent resistance the body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. performance data cecc 40101-004 cecc 40101-804 *actual performance requirements requirements maximum typical load at commercial rating: 1000 hours at 70 c ? r% 0.3 0.1 load at cecc rating: 1000 hours at 70 c ? r% 0.5 0.5 0.3 0.05 dry heat: 1000 hours at 155 c ? r% 0.5 0.5 **1.0 0.15 shelf life: 12 months at room temperature ? r% not specifed not specifed 0.1 0.03 derating from rated power at 70 c zero at 155 c 50% at 125 c short term overload ? r% 0.1 0.1 0.1 0.02 climatic ? r% 0.5 0.5 0.3 0.1 climatic category 55/155/56 55/155/56 55/155/56 long term dampl heat ? r% 0.5 0.5 0.5 0.1 temperature rapid change ? r% 0.1 0.1 **0.2 0.05 resistance to solder heat ? r% 0.1 0.1 0.06 0.03 vibration and bump ? r% 0.1 0.1 0.06 0.02 noise (in a decade of frequency) v/v not specifed not specifed 1.0 0.1 voltage coeffcient of resistance ppm/v not specifed not specifed <1 note: *an 0.01 ohm addition to be added to the performance claims of all resistors <10r. ** all products within the specified approved range meet cecc requirements. dimensions (mm) & weight (g) type l max d max f min d nom pcb mounting centres min bend radius wt. nom rc55 7.2 2.5 30 0.6 10.2 0.6 0.24 rc65 10.0 3.7 30 0.6 12.7 0.6 0.40 rc70 15.5 5.5 30 0.8 18.4 1.2 1.15 l d f d
rc series issue may 2007 irc advanced film division ? corpus christi texas 78411 usa ? irc advanced film division telephone: 361 992 7900 ? facsimile: 361 992 3377 ? email: afdsales@irctt.com ? website: www.irctt.com precision metal film resistor table of resistance restrictions tolerance tcr ppm/c rc55 rc65 rc70 0.05% 0.1 - 0.25% 0.5 - 1% 0.05% 0.1 - 0.25% 0.5 - 1% 0.05% 0.1 - 0.25% 0.5 - 1% 5 10 to 500k 10 to 500k 1 to 500k 10 to 500k 10 to 500k 1 to 500k 10 to 750k 10 to 750k 1 to 750k 10 10 to 1m 10 to 1m 1 to 1m 10 to 1m 10 to 1m 1 to 1m 10 to 1m 10 to 1m 1 to 1m 15 10 to 1m 5 to 1m 1 to 1m 10 to 1m 5 to 1m 1 to 1m 10 to 1m 10 to 2m 1 to 2m 25 10 to 1m 5 to 2m 1 to 2m 10 to 1m 5 to 2m 1 to 2m 10 to 1m 10 to 5m 1 to 5m 50 10 to 1m 5 to 2m 1 to 4m 10 to 1m 5 to 2m 1 to 4m 10 to 1m 5 to 10m 1 to 10m 100 10 to 1m 1 to 2m 1 to 4m 10 to 1m 1 to 2m 1 to 4m 10 to 1m 1 to 10m 1 to 10m application notes matched sets and networks welwyn has many years experience in the supply of matched set of precision resistors resistors can be supplied matched for tolerance and tcr down to 0.02% and 2 ppm/c, either as seperate resistors or pre-assembled and encapsulatd within a plastic box. the individual resistors within a set or module can be manufactured with a tolerance of 0.05% and tcr of 5 ppm/c. a low inductance version is available at 1% tolerance. for low inductive version add suffx n. packaging the standard method of packaging rc55 resistors is taped in ammo packs. taped resistors on reel or loose packed components can also be suppled by special request. the standard packaging for rc65 and rc70 resistors is loose in boxes. by special request the rc65 components can also be suppled taped on reel or in ammo pack. in the case of tape packed components the usable lead length is reduced by the width of the tape. type rc55 rc65 rc70 small box 250 125 25 large box 1000 500 250 reel 5000 2500 - large ammo 1000 1000 - standard quantities per package prefx rc - rc55lf c 6k8 b b type rc55lf, rc65lf, rc70lf tcr code v = 5 ppm/c, t = 10 ppm/c, y = 15 ppm/c d = 25 ppm/c, c = 50 ppm/c resistance value ex: 6k8 = 6.8k ? tolerance f = 1%, d = 0.5%, c = 0.25%, b = 0.1%, a = 0.05% packaging a = ammo pack; b = bulk; t = tape and reel for additional inforamiotn or to discuss your specifc requirements, please contact our applications team using the contact details below. 17 5 ? w elwyn components limited bedlington, northumberland ne22 7aa, uk t elephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com we bsite: www .welwyn-tt.com issue b 03.0 2 52 f 1 f 2 6 6 5 body location f 1 ? f 2 1 .4 mm ordering data
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