p r ecision metal film resistors rcp series s pr ecision r esistors with uprated power s low tcrs over a wide r esistance range s t olerance down to 0.05% s low noise and negligible voltage coef ficient s expr ess delivery available general note w elwyn components r eserves the right to make changes in pr oduct specification without notice or liability . all information is subject to w elwyn? s own data and is consider ed accurate at time of going to print. ? 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 w ebsite: www .welwyn-tt.com 176 rc55p rc65p rc70p notes power rating at 70c watts 0.5 1.0 1.5 resistance range ohms 5r to 2m 5r to 2m 10r to 5m limiting element voltage volts 350 500 500 isolation voltage volts 500 500 700 tcr (20 to +70c) & codes ppm/c resistance tolerance (code) % 0.05(w), 0.1(b), 0.25(c) r estrictions standar d values e24, e96 pr eferr ed any value to or der thermal impedance c/watt 110 70 60 ambient temperatur e range c -55 to +155 electrical data 11 . 09 a subsidiary of tt electr onics plc w elwyn components construction ceramic r ods ar e coated with a metal film and plated steel caps ar e for ce fitted. a helical cut is used to adjust the film to its final value. t ermination wir es ar e welded to the caps and the r esistor is pr otected with a specially formulated epoxy coating. t erminations material solder -coated copper wir e. str ength the terminations meet the r equir ements of iec 68.2.21 solderability the terminations meet the r equir ements of iec 115-1, clause 4.17.3.2 dimensions (mm) and w eight (g) pcb min mounting bend wt. t ype l max d max f min d nom. centr es radius nom. rc55p 7.2 2.5 30 0.6 10.2 0.6 0.24 rc65p 10.0 3.7 30 0.6 12.7 0.6 0.40 rc70p 15.5 5.5 30 0.8 18.4 1.2 1.15 physical data l d f d marking t ype r efer ence, tcr code, r esistance value and tolerance code. the r esistance value marking conforms to iec 62. solvent resistance the body pr otection and marking ar e r esistant to all normal industrial cleaning fluids suitable for printed cir cuits. 5(v), 10(t), 15(y), & 25(d) see r esistance
rc55p values 10 100k other values/styles actual performance *actual performance maximum typical maximum typical load at rated power : 1000 hrs at 70c ? r % 0.10 0.03 0.5 0.1 dry heat : 1000 hrs at 155c ? r % 0.3 0.1 1.0 0.15 shelf life : 12 months at room temperature ? r % 0.015 0.003 0.1 0.03 c 551 t a o r e z c 551 t a o r e z c07 ta rewop detar mor f gni tared short term overload ? r % 0.5 0.005 0.1 0.02 climatic ? r % 0.25 0.05 0.3 0.1 65 / 551 / 55 65 / 551 / 55 yrogetac c i tami lc long term damp heat ? r % 0.25 0.05 0.5 0.1 temperature rapid change ? r % 0.04 0.02 0.2 0.05 resistance to solder heat ? r % 0.02 0.003 0.06 0.03 vibration and bump ? r % 0.2 0.002 0.06 0.02 1.0 0.1 30.0 1.0v/v ) y cneuqe r f f o eda c ed a n i ( e s i on 1< 1< v / mp p e cna t s i s e r f o t ne i c i f f eoc ega t l ov matched sets and networks welwyn has many years experience in the supply of matched sets of precision resistors. resistors can be supplied matched for tolerance and tcr down to 0.02% and 2ppm/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 a tcr of 5ppm/c. pr ecision metal film resistors rcp series ? welwyn components limited bedlington, northumberland ne22 7aa, uk telephone: +44 (0) 1670 822181 facsimile: +44 (0) 1670 829465 email: info@welwyn-tt.com website: www.welwyn-tt.com 11 . 09 welwyn components application notes performance data *an 0.01 o hm addition to be added to the performance claims of all resistors <10r. t able of resistance restrictions packaging the standard method of packaging rc55p resistors is taped in ammopacks. taped resistors on reel or loose packed components can also be supplied by special request. the standard packaging for rc65p and rc70p resistors is loose in boxes. by special request the r65p components can also be supplied taped on reel or in ammopack. in the case of tape packed components the usable lead length is reduced by the width of the tape. tolerance p07cr p56cr p55cr rct ppm/ c 0.05% .1-.25% 0.05% .1-.25% 0.05% .1-.25% 5 10r to 500 k 10r to 500 k 10r to 50 0 10r to 50 0 10r to 750 k 10r to 750k 10 10r to 1 m 10r to 1 m 10r to 1 m 10r to 1 m 10r to 1 m 10r to 1m 15 10r to 1 m 2r49 to 1 m 10r to 1 m 5r to 1 m 10r to 1 m 10r to 2m 25 10r to 1 m 2r49 to m 10r to 1 m 5r to 2 m 10r to 1 m 10r to 5m 1 note 1: based on sampling. 100% screened product is available.
p re c isio n m e tal f i l m r e s i sto r s r c p serie s ? 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 w ebsite: www .welwyn-tt.com 11 . 09 w elwyn components or d e r in g p r o ced u r e ex a m p l e : rc55p w i t h t cr o f 5pp m / c a t 31. 6 k ilo h m s and 0 . 1% to l e rance i n an a mm o pack box o f up to 1000 p i e ce s - r c 5 5 p v ? 3 1 k 6 b i t yp e t c r v 5 p p m / c y 15 p p m / c t 10 p p m / c d 25 p p m / c va l ue (u s e iec62 code) t o l e rance (u s e iec62 code) w 0 . 0 5 % b 0 . 1 % c 0 . 2 5 % pa cki ng i a mmo rc5 5 p , rc6 5 p u p to 100 0 / box s t anda r d b u l k rc7 0 p 250/ box for 5ppm/c screened product, replace the packing suffix with sc. example: rc55pv-31k6bsc
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