ss-263 r4 aha 6/20/07 bolivar drive p.o. box 547 bradford, pa 16701 usa 814-362-5536 fax 814-362-8883 www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. page 1 of 8 fixed carbon composition resistor rc 1/4, 1/2, 1 series 1. features improved pulse endurance characteristics compared to carbon-film devices wide resistance range is available, 1 ohm - 22m ohm stability class: 10% 2. type designation type designation shall be as the following form. koa speer electronics, inc. 3. dimensions type rc 1/4 table 1 0.248?.028 (6.3?.7) 0.094?.004 (2.4?.1) 1.181?.118 (30?.0) ldh rc 1/2 0.374 .... .. (9.5 ) 0.142?.008 (3.6?.2) 1.102?.118 (28?.0) taping & forming t52 h forming: 1/2 only h60, h62: 1/4 only t52 tolerance j: ?% k: ?0% j packaging a: ammo r: reel bulk: no designation (rc 1: bulk only, 500 pcs.) a rc type power rating 1/4: 0.25w 1/2: 0.5w 1: 1w 1/2 termination material t: sn t 104 nominal resistance dimensions in inches (mm) 0.024?.002 (0.6?.05) d 0.028 .... .. (0.7 ) +0.8 -0.7 +0.031 -0.028 +0.07 -0.05 +0.003 -0.002 d d marking resistive film insulation core end cap lead wire l h 2 significant figures + 1 multiplier certified certified rc 1 0.562?.02 (14.3?.7) 0.224?.01 (5.7?.3) 1.02?.01 (26?.3) 0.035?.002 (0.9?.05) ss-263 r4 6/20/07 4:09 pm page 1
bolivar drive p.o. box 547 bradford, pa 16701 usa 814-362-5536 fax 814-362-8883 www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. page 2 of 8 ss-263 r4 koa speer electronics, inc. 5. derating curve the derated values of dissipation for temperatures in excess of 70? shall be indicated by the following curve. 4. standard specifications % rated power 100 80 60 40 20 -60 -40 0 40 60 80 100 160 70 20 ambient temperature ( c) 0 -55 120 125 -20 140 style rc 1/4 rc 1/2 rc 1 +5 ~ -4 +6 ~ -5 +7.5 ~ -6 +1 ~ -7 +1 ~ -5 0 ~ -6 0 ~ -7.5 0 ~ -10 0 ~ -15 rated dissipation at 70? w @ +100? j (?%): e24 series isolation voltage v -55? to 125? limiting element voltage v rated resistance range temp. coefficient of resistance % tolerance operating temperature range ? rated resistance range @ +125? 0.2 0.5 1.0 250 350 500 1 ohm ~ 5.6m ohm 1 ohm ~ 22m ohm 2.2 ohm ~ 1.0m ohm 1 ohm ~ 1k ohm 1.1k ohm ~ 10k ohm 11k ohm ~ 100k ohm 110k ohm ~ 1m ohm 1.1m ohm ~ 22m ohm 2.2 ohm ~ 1k ohm 12k ohm ~ 10k ohm 12k ohm ~ 100k ohm 120k ohm ~ 1m ohm 100 500 1000 note 1 rated voltage: (rated dissipation) x (rated resistance) (d.c. or a.c. r.m.s. voltage) note 2 limited element voltage can only be applied to resistors when the resistance value is equal to or higher than the critic al resistance value. k (?0%): e12 series k (?0%): e12 series -55? to 100? +6.5 ~ 0 +10 ~ 0 +13 ~ 0 +15 ~ 0 +20 ~ 0 +6.5 ~ -3 +10 ~ -3 +13 ~ -3 +15 ~ -3 @ -55? ss-263 r4 6/20/07 4:09 pm page 2
ss-263 r4 bolivar drive p.o. box 547 bradford, pa 16701 usa 814-362-5536 fax 814-362-8883 www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. page 3 of 8 koa speer electronics, inc. item requirement conditions visual examination markings shall be legible, clause 4.4.1 as checked by visual examination checked by visual examination resistance resistance value shall correspond with clause 4.5 the rated resistance taking into account the specific tolerance voltage proof no breakdown or flashover clause 4.7 v-block method rc 1/4 100 va.c., 60s rc 1/2 500 va.c., 60s rc 1 1000 va.c, 60s variation of resistance see ratings table clause 4.8 with temperature measuring temperature: +20?/-55?/ +20?/+125?/+20? overload r ?2%+0.1 ohm) clause 4.13 no visible damage, legible marking the applied voltage shall be 2.5 times of the rated voltage or twice of the limiting element voltage, whichever is the less severe, 5s. robustness of tensile r ?2%+0.1 ohm) no visible damage clause 4.16.2 10n for 5~10s; rc 1: 20n for 5~10s terminations bending r ?2%+0.1 ohm) no visible damage clause 4.16.3 5n twice; rc 1: 10n torsion r ?2%+0.1 ohm) no visible damage clause 4.16.4 180?, 2 rotation solderability in accordance with clause 4.17.4.5 clause 4.17 235?, 5s resistance to r ?3%+0.1 ohm) clause 4.18 soldering heat no visible damage, legible marking after immersion into the flux, the immersion into solder shall be carried out 4mm from the body at 350? for 3.5s; rc 1: 350? for 3.0s rapid change r ?2%+0.1 ohm) no visible damage clause 4.19 5 cycles between -55? and +125? of temperature rc 1: -55? and +85? climatic sequence r ?10%+0.5 ohm) insulation resistance: clause 4.23 r 100m ohm, no visible damage dry/damp heat(12+12h cycle), first cycle/ cold/damp heat(12+12h cycle), remaining cycle/d.c.load damp test, r ?10%+0.5 ohm) insulation resistance: clause 4.24 steady state r 100m ohm, no visible damage, legible marking 40?, 95%r.h., 56 days, test a) , b) and c) of clause 4.24.2.1 endurance at 70? r ?10%+0.5 ohm) no visible damage clause 4.25.1 rated voltage, 1.5h ?n? insulation resistance : r 1g ohm 0.5h ?ff? 70?, 1,000h endurance at the upper r ?10%+0.5 ohm) no visible damage clause 4.25.3 category temperature insulation resistance : r 1g ohm 125?, no-load, 1,000h 6. performance characteristics jis c5201-1:1998 ss-263 r4 6/20/07 4:09 pm page 3
ss-263 r4 bolivar drive p.o. box 547 bradford, pa 16701 usa 814-362-5536 fax 814-362-8883 www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. page 4 of 8 koa speer electronics, inc. 7. typical characteristics surge resistance characteristics relationship between load ratio and category temperature endurance at 70? variation with time frequency characteristics ss-263 r4 6/20/07 4:09 pm page 4
bolivar drive p.o. box 547 bradford, pa 16701 usa 814-362-5536 fax 814-362-8883 www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. page 5 of 8 ss-263 r4 koa speer electronics, inc. 8. packaging carbon composition resistors can be packaged in bulk, tape and reel, and tape and ammo box. all resistors are packaged in sealed poly bags with desiccant to maintain a consistent humidity during storage. if parts are removed from the protective plastic bag they should be used as soon as possible or resealed in the plastic bag. code a *a' b c 1 c 2 d*y rc 1/4, 1/2 r 10.24 0.20 11.02 2.95 0.20 2.38 0.04 3.07 0.04 0.57 0.02 0.12 (260 5) (280) (75 5) (60.4 1) (78 1) (14.5 0.5) (3) dimensions in inches (mm) (1) dimensions of tape and reel style code a b t rc 1/4 h60 0.394 0.020 0.197 0.020 0.059 (10.0 0.5) (5.0 0.5) (1.5 max.) rc 1/4 h62 0.492 0.020 0.197 0.020 0.059 (12.5 0.5) (5.0 0.5) (1.5 max.) rc 1/2 h 0.591 0.020 0.197 0.020 0.071 (15.0 0.5) (5.0 0.5) (1.8 max.) dimensions in inches (mm) * values for reference (2) dimensions of horizontal forming ss-263 r4 6/20/07 4:09 pm page 5
ss-263 r4 bolivar drive p.o. box 547 bradford, pa 16701 usa 814-362-5536 fax 814-362-8883 www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. page 6 of 8 koa speer electronics, inc. 8. packaging cont. (3) dimensions of tape style w l 1 -l 2 tt pz s rc 2.063 ...... 0.039 0.236 ?.020 0.020 0.200 0.015 0.039 0.126 1/4, 1/2 (52.4 ) (1.0 max.) (6.0 0.5) (0.5 max.) (5.08 0.38) (1.0 max.) (3.2 min.) dimensions in inches (mm) +1.6 -1.4 +0.063 -0.055 (4) ammo box style code a b c rc 1/4 t52: 2.047 ( 52.0) 2.362 0.197 2.953 0.197 10.827 0.197 width tape (60.0 5.0) (75.0 5.0) (275.0 5.0) rc 1/2 t52: 2.047 ( 52.0) 2.559 0.197 2.953 0.197 17.913 0.197 width tape (65.0 5.0) (75.0 5.0) (455.0 5.0) dimensions in inches (mm) ss-263 r4 6/20/07 4:09 pm page 6
ss-263 r4 bolivar drive p.o. box 547 bradford, pa 16701 usa 814-362-5536 fax 814-362-8883 www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. page 7 of 8 koa speer electronics, inc. tape & reel style quantity/reel reel size (pcs) (mm) rc 1/4 5000 260 rc 1/2 3000 260 9. packaging specifications ammo box style width of taping quantity/box (mm) (pcs) rc 1/4 52 2000 rc 1/2 52 2000 10. marking 10.1 marking of product the rated resistance and tolerance shall be marked by four color coding bands on the surface of resistor. the color coding shall be based on jis c 5062-1997 ?arking codes for resistors and capacitors? 10.2 marking of package the label of a minimum package shall be legibly marked with follows; 1.) type 2.) rated resistance 3.) tolerance on rated resistance 4.) lot no. 5.) quantity style bulk (pcs) rc 1 500 ss-263 r4 6/20/07 4:09 pm page 7
ss-263 r4 bolivar drive p.o. box 547 bradford, pa 16701 usa 814-362-5536 fax 814-362-8883 www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. page 8 of 8 koa speer electronics, inc. 11. storage koa speer electronics, inc. recommends storing carbon composition resistors in a controlled environment at a temperature of 5? to 35? and relative humidity of less than 60%. inventory should always be used on a first - in - first - out basis. 12. product carbon composition resistors are manufactured by extruding a blend of carbon and organic binders inside a phenolic outer body. the extrusion is cut to length, leads inserted, cured and marked to form a finished resistor. the carbon and binder mixture is adjusted to produce different resistance values. the resistors are sorted for 5%, 10% and 20% tolerance values. carbon composition resistors are able to withstand larger short-term pulses and higher voltages than film resistors and are virtually impervious to esd events (electro-static discharge). carbon composition resistors are also sensitive to moisture and, therefore, storage recommendations should be adhered to. generally, any moisture absorbed during storage will be ?aked out during the solder operation. if the product is stored properly the resistance shift during the soldering operation will be minimal, less than 2% or 3%. ss-263 r4 6/20/07 4:09 pm page 8
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