design and speci? cations are each subject to change without notice. ask factory for the current technical speci? cations before purchase and/or use. should a safety concern arise regarding this product, please be sure to contact us immediately. metal film resistors e 1 r 2 o 3 s 4 2 5 c 6 h 7 f 8 1 9 0 10 0 11 2 12 resistance tolerance d f 0.5 % 1% product code metal film resistors s2 25 power rating at 70 c amb. 0.25 w 0.25 w special feature and cut & formed style c p t standard taped & box (52 mm) taped & box (26 mm) resistance value the first three digits are significant figures of resistance and the 4th digit denote number of zeros following. decimal point is expressed by r as 97.6 = 97r6. temperature coefficient 10 ? / c(ppm/ c) h 50 hlh f d f d 1st significant figure 2nd significant figure 3rd significant figure resistance tolerance multiplier type dimensions (mm) mass (weight) [mg/pc.] l f d f dh eros2c 3.20 0.20 1.70 +0.20 0.45 0.05 30 3 107 ero25c 6.30 0.50 2.30 0.50 0.60 0.05 30 3 228 ?0.10 metal ? lm lead wire ceramic co re, high thermal conductivity spiraling marking end cap construction dimensions in mm (not to scale) standard qu antity : 2000 pcs. metal fi lm resistors type: eros2 (0.25 w) ero25 (0.25 w) features performance, reliability ...... low t.c.r. and noise, high reliability automatic insertion ............. taping style fo r automatic inserting machine marking ............................... 5 color code marking reference standards ......... iec 60115- 2, ji s c 5201-2 explanation of part numbers insulative coating feb. 2006
metal film resistors design and speci? cations are each subject to change without notice. ask factory for the current technical speci? cations before purchase and/or use. should a safety concern arise regarding this product, please be sure to contact us immediately. ?60 ?40 ?20 0 20 40 60 80 100 120 140 160 180 0 20 40 60 80 100 120 ambient temperature ( c) 150 c ?55 c 70 c rated load (%) a c b flat box ma rk in g 3.2 min. 0.5 max. 0.5 max. 6 1 f d l p p 1 max. 0.8 max. l 1 l 2 0 w w 0 f d type power rating at 70 c (w) limiting element voltage (maximum rcwv) (1) (v) maximum overload voltage (2) (v) dielectric withstanding voltage (vac) t.c.r. [ 10 ?6 /c (ppm/c)] resistance tolerance (%) resistance range ( ) resis- tance value min. max. eros2 0.25 250 500 300 50 f(1) d(0.5) 10 1 m e24 e96 ero25 0.25 250 500 500 50 f(1) d(0.5) 10 1 m e24 e96 ratings (1) rate d continuous working voltage (rcwv) shall be de ter mined from rcwv= = power rating resistance value, or limiting element voltage (max i mum rcwv ) list ed above, wh ichever less. (2) overload (short-tim e overload) test voltage (sotv) shall be determined from sotv=2.5 power rating or max. overload voltage list ed above which ev er less. power derati ng curve for resistors operated in ambient temperatures above 70 c, powe r rating shall be derated in ac cor dance with the ? gure on the right. axial taping type shape and packaging packaging sh ape type part numbers std. qty. (pcs./ box) size of box a b c (mm) 26 mm axial taping 1 metal fi lm r eros2tho 5 000 52 85 255 52 mm axial taping 2 metal fi lm r eros2pho 5 000 78 85 255 26 mm axial taping 3 metal fi lm r ero25tho 4 000 52 95 255 52 mm axial taping 4 metal fi lm r ero25pho 2 000 78 58 255 |l 1? l 2 | < 1.0 cumulative 2502 mm by 50 pitch shape l max. f d max. f d p 0.3 ww 0 1 3.4 1.9 0.45 5.0 26 +1 41.5max. 2 3.4 1.9 0.45 5.0 521 64.50.5 3 6.5 2.5 0.6 5.0 26 +1 41.5max. 4 6.5 2.5 0.6 5.0 521 64.50.5 ?0 ?0 feb. 2006
design and speci? cations are each subject to change without notice. ask factory for the current technical speci? cations before purchase and/or use. should a safety concern arise regarding this product, please be sure to contact us immediately. metal film resistors p 2 f f d h 0 p 1 f d w 2 w 0 w 1 w f d 0 p 0 h t l a p 130 45 320 indication type part numb ers std. qty. (pcs.) metal fi lm r eros2gho 2 000 dimensio ns (mm) dimensions (mm) dimensions (mm) p 12.71.0 w 0 5 min. h 02 p 0 12.70.3 w 1 9.00.5 t 0.70.2 p 1 3.850.70 w 2 3 max. a 3.20.2 p 2 6.351.00 h 0 19.0 +1.0 f d 1.7 +0.2 f 5.00.5 f d 0 4.00.2 f d 0.450.05 w 18.00.5 k 0 max. ?0.1 ?0.5 safety precautions 1. keep the rate d power and ambient temperature within the spec i ? ed de r at ing curve. * when positioning and mounting metal film resistors (here af ter called the resistors), make allowance for the effect of heat generated through close contact between the re sis tors and neigh bor ing com po nents and for the temp erature rise of ad ja cent heat-gen erating com po nents. 2. if a transi ent load (heavy load in a short time) like a pulse is ex pect ed to be applied, check and eval u ate the operat ions of the re sis tors when instal led in your products before use. when app lying pulses to the resistors, keep the pulse peak with in the rat ed voltage. 3. when the resistor s' protective coat ings are chipped, ? awed, or re moved, the characte ristics of the re sis tors may be im paired. take spe cial care not to apply mechan ical shock dur ing automatic mounting or cause dam age dur ing handling of the boards with the resistors mount ed. 4. ultrasonic cleaning may cut the lead wire due to resonance. try and check it before use. the followin g are precautions for individual products. please also refer to the precautions com mon to fi xed re sis tors shown on page er3 of this catalog. radial taping for small type feb. 2006
? er3 ? safety precautions (common precautions for fixed resistors) when using ou r products, no matter what sort of equipment they might be used for, be sure to make a written agreement on the speci? cations with us in advance. the design and speci? cations in this catalog are subject to change without prior notice. do not use the products beyond the speci? cations described in this catalog. this cata log explains the quality and performance of the products as individual components. be fore use, check and evaluate their operations when installed in your products. install the following systems for a failsafe design to ensure safety if these products are to be used in equip ment where a defect in these products may cause th e loss of human life or other signi? cant damage, such as damage to vehicles (au to mo bile, train, vessel), traf? c lights, medical equipment, aerospace equipment, elec tric heating ap pli anc es, com bus tion/gas equipment, rotating equipment, and disaster/crime prevention equip ment. ? systems equipped with a protection circuit and a protection device ? systems equip ped with a redundant circuit or other system to prevent an unsafe status in the event of a single fault (1) precauti ons fo r use these products are designed and manufactured for general and stan dard use in general elec tron ic equipment (e.g. av equipm ent, home el ectric ap pli anc es, of? ce equipment, information and com mu ni ca tion equipment) these products are not intended for use in the following special conditions. be fore u sing the products, care ful ly check the effects on their quality and performance, and determine whether or not they can be used. 1. in liquid, such as water, oil, chemicals, or organic solvent 2. in direct sunlight, outdoors, or in dust 3. in salty air or air with a high concentration of corrosive gas, such as cl 2 , h 2 s, nh 3 , so 2 , or no 2 4. electric static discharge (esd) environment these components are sensitive to static electricity and can be damaged under static shock (esd). please take measures to avoid any of these environments. smaller componen ts are more sensitive to esd environment. 5. electromagnetic environment avoid any enviro nment where stro ng electromagnetic waves exist. 6. in an environment where these pr oducts cause dew condensation 7. s e a li n g o r c o ating of these products or a printed circuit board on which thes e products are mounted, with resin or othe r materials these products generate joule heat when energized. carefu lly position th ese products so that their heat will not affect th e other components. carefully position thes e products so that their temperatures will not exceed the category temperature range due to the effect s of neighboring heat-generating com po nents. do not mount or place heat-generating com po nents or in? ammables, such as vinyl-coated wires, near these products . note that non- cleaning solder, halogen-based highly active ? ux, or water-soluble ? ux may dete riorate the performance or reliab ility of the products. carefully select a ? ux cleaning agent fo r use after soldering. an unsuit able agent may deteriorate the performance or reliability. in particular, when using water or a water-soluble cleaning agent, be careful not to leave water res i dues. otherwise, the insulation performance may be deteriorated. (2) precaution s for storage the performance of these products, including the solderability, is guaran teed fo r a year from the date of arrival at your company, provided that they remain packed as they were when delivered and stored at a temperature of 5 c to 35 c and a relative humidity of 45 % to 85 %. even wi thin the above guarantee periods, do not store these products in the fol low ing conditions. otherwise, their elec tri cal performance and/or solderability may be dete riorated, and the packaging materials (e.g. tap ing ma te ri als) may be de formed or dete riorated, resulting in mounting failures. 1. in salty air or in air with a high concentration of corrosive gas, such as cl 2 , h 2 s, nh 3 , so 2 , or no 2 2. in direct sunlight package ma rkings include the product number, quantity, and country of origin. in principle, the country of origin should be indicated in english. feb. 2006
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