general note irc reser v es the r ight to mak e changes in product speci?cation without notice or liability . all inf or mation is subject to irc? s o wn data and is considered accur ate at time of going to pr int. a subsidiar y of tt electronics plc ? 4222 south staples street ? cor pus chr isti t e xas 78411 usa ? irc advanced film division t elephone: 361 992 7900 ? f acsimile: 361 992 3377 ? w ebsite: www .irctt.com rc ser ies issue november 2009 sheet 1 of 3 standard v alues e24, e96 preferred any value to order thermal impedance c/w att 1 10 70 60 ambient t emperature range c -55 to +155 rc series ? resistance tolerance down to 0.05% ? low noise and negligible voltage coef?cient ? 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 w atts 0.25 0.5 1.0 resistance range ohms 1r to 4m 1r to 4m 10r0 to 10m limiting element v oltage v olts 350 350 500 isolation v oltage v olts 500 500 700 tcr (20 to +70c) & codes ppm/c 5(v), 10(t), 15(y), 25(d), 50(c) & 100(z) see resistance restrictions resistance t olerance % 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 w atts 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 v oltage v olts 200 200 250 250 350 isolation v oltage v olts 280 280 350 350 500 tcr & codes ppm/c 15(y), 25(d), 50(c) & 100(z) see resistance restrictions resistance t olerance (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 w atts 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 v oltage v olts 200 250 250 350 isolation v oltage v olts 280 350 350 500 tcr & codes ppm/c 15(t), 25(e) & 50(c) see resistance restrictions resistance t olerance (code) % 0.05(w), 0.1(b), 0.25(c), 0.5(d) & 1(f) precision metal film resistor
rc ser ies issue november 2009 sheet 2 of 3 ? 4222 south staples street ? cor pus chr isti t e xas 78411 usa ? irc advanced film division t elephone: 361 992 7900 ? f acsimile: 361 992 3377 ? w ebsite: www .irctt.com precision metal film resistor physical data construction a metal ?lm is deposited onto a high quality ceramic former . nickel-plated steel caps are force ?tted to the former and termination wires are welded to the caps. the resistor is adjusted to value by a helical cut in the ?lm and the body is protected with a specially formulated epoxy coating. t erminations 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 1 15-1, clause 4.17.3.2. marking d n a e u l a v e c n a t s i s e r , e d o c r c t , e c n e r e f e r e p y t 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. dimensions (mm) & w eight (g) t ype l max d max f min d nom pcb mounting centers 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 environmental data cecc 40101-004 cecc 40101-804 *actual performance requirements requirements maximum t ypical load at commercial rating: 1000 hours at 70c --- --- 0.3 0.1 load at cecc rating: 1000 hours at 70c 0.5 0.5 0.3 0.05 dry heat: 1000 hours at 155c 0.5 0.5 **1.0 0.15 shelf life: 12 months at room t emperature not speci?ed not speci?ed 0.1 0.03 derating from rated power at 70 c zero at 155c 50% at 125 c --- --- short t erm overload 0.1 0.1 0.1 0.02 climatic 0.5 0.5 0.3 0.1 climatic category 55/155/56 55/155/56 55/155/56 --- long t erm damp heat 0.5 0.5 0.5 0.1 t emperature rapid change 0.1 0.1 **0.2 0.05 resistance t o solder heat 0.1 0.1 0.06 0.03 v ibration and bump 0.1 0.1 0.06 0.02 noise (in a decade of frequency) not speci?ed not speci?ed 1.0 0.1 v oltage coef?cient of resistance not speci?ed not speci?ed --- <1 note: *an 0.01 ohm addition to be added to the performance claims of all resistors <10r. ** all products within the speci?ed approved range meet cecc requirements. ?r% ?r% ?r% ?r% ?r% ?r% ?r% ?r% ?r% ?r% v/v ppm/v l f d d
rc ser ies issue november 2009 sheet 3 of 3 ? 4222 south staples street ? cor pus chr isti t e xas 78411 usa ? irc advanced film division t elephone: 361 992 7900 ? f acsimile: 361 992 3377 ? w ebsite: www .irctt.com precision metal film resistor t able of resistance restrictions t olerance 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 w elwyn 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 separate resistors or pre-assembled and encapsulated 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 suf?x n. the standard method of packaging rc55 resistors is taped in ammo packs. t aped resistors on reel or loose packed components can also be supplied by special reques t. the standard packaging for rc65 and rc70 resistors is loose in boxes. by special request the rc65 components can also be supplied taped on reel or in ammo pack. in the case of tape packed components the usable lead length is re- duced by the width of the tape. t ype rc55 rc65 rc70 small box 250 125 25 large box 1000 500 250 reel 5000 2500 - large ammo 1000 1000 - standard quantities per package packaging 52 f 1 5 6 6 f 2 body location: f 1 - f 2 1.4mm pre?x rc - rc55lf c 6k8 b b t ype 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 v alue ex: 6k8 = 6.8k t olerance f = 1%, d = 0.5%, c = 0.25%, b = 0.1%, w = 0.05% packaging a = ammo pack; b = bulk; t = t ape and reel for additional information or to discuss your speci?c requirements, please contact our applications t eam using the contact details below . ordering data
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