cmf industrial www.vishay.com vishay dale revision: 02-may-13 1 document number: 31018 for technical questions, contact: ff2aresistors@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 metal film resistors, industrial, precision features ? small size - conformal coated ? flame retardant epoxy coating ? controlled tempera ture coefficient ? excellent high frequency characteristics ? exceptionally low noise; typically 0.10 v/v ? low voltage coefficient to 5 ppm/v ? special tolerance and or tc matching available on request ? material categorization: ? for definitions of compliance please see www.vishay.com/doc?99912 note ? * this datasheet provides information about parts that are ? rohs-compliant and/or parts th at are non-rohs-compliant. for ? example, parts with lead (pb) te rminations are not rohs-compliant. ? please see the information/tables in this datasheet for details. vishay dale model cmf is also available as military qualified styles rn and rl. se e appropriate catalog or web page for the mil-spec ratings/attributes. (ex cept for marking, the industrial and military ve rsions are exactly the same. depending upon stock, military marked parts may be su pplied as industrial rated parts). note (1) continuous working voltage shall be or maximum working voltage, whichever is less note (2) see the load life shift due to power and derating table for a summary of the more common combinations of power rating, case siz e and ambient operating temperature that prevail in various industrial and military resistor specifications. the performance table quantifies the load life stability under these combinations. notes (3) tolerances of 0.5 % (d), 0.25 % (c) and 0.1 % (b) are available only in 50 ppm and 25 ppm temperature coefficients. ? for additional information on packaging, refer to the through-hole resistor packaging document ( www.vishay.com/doc?31544 ). standard electrical specifications global ? model historical model maximum working voltage (1) v resistance range ? 0.1 % to 1 % 0.1 % to 0.5 % 1 % to 5 % 1 % 2 %, 5 % 1 % 2 %, 5 % 1 % 2 %, 5 % 25 ppm/c 50 ppm/c 50 ppm/c 100 ppm/c 100 ppm/c 150 ppm/c 150 ppm/c 200 ppm/c 200 ppm/c cmf50 cmf-50 200 10 to 2.5m 10 to 2.5m 10 to 2.5m 10 to 2.5m 10 to 2.5m 10 to 22m 10 to 22m 10 to 22m 10 to 22m cmf55 cmf-55 250 10 to 2.5m 10 to 2.5m 10 to 5m 1 to 22.1m 1 to 22.1m 0.5 to 50m 0.5 to 50m 0.5 to 50m 0.1 to 50m cmf60 cmf-60 500 10 to 2.5m 10 to 2.5m 10 to 10m 1 to 10m 1 to 10m 0.5 to 10m 0.5 to 10m 0.5 to 10m 0.1 to 10m cmf65 cmf-65 500 10 to 2.5m 10 to 2.5m 10 to 10m 1 to 15m 1 to 15m 0.5 to 22m 0.5 to 22m 0.5 to 22m 0.1 to 22m cmf70 cmf-70 500 10 to 2.5m 10 to 2.5m 10 to 10m 1 to 15m 1 to 15m 1 to 22m 1 to 22m 1 to 22m 1 to 22m cmf07 cmf-07 250 - - - - 5 to 5m - 1 to 5m - 1 to 5m cmf20 cmf-20 500 - - - - 5 to 10m - 1 to 10m - 1 to 10m maximum commercial power rating wattage (2) model cmf50 cmf55 cmf60 cmf65 cmf70 cmf07 cmf20 at + 70 c 0.25 w 0.5 w 1 w 1 w 1 w 0.5 w 1 w at + 125 c 0.125 w 0.25 w 0.5 w 0.75 w 0.75 w - - global part number information p x r global model resistance value tolerance packaging code (see standard r = b = 0.1 % e = 25 ppm ek = lead (pb)-free, bulk ea = lead (pb)-free, t/r (full) eb = lead (pb)-free, t/r (1000 pieces) electrical k = k c = 0.25 % h = 50 ppm specifications m = m d = 0.5 % k = 100 ppm table) r10000 = 0.1 f = 1 % l = 150 ppm 680k00 = 680 k g = 2 % n = 200 ppm 1m0000 = 1.0 m j = 5 % new global part numbering: cmf55301r00fkre (preferred part numbering format) cmf55301r00fkre historical part number example: cmf-553010ft-1 (will continue to be accepted) 6 3 r 1 - t f 0 1 0 3 5 5 - f m c historical model resistance value tolerance code temp. coefficient packaging blank = standard (dash number) (up to 3 digits) from 1 to 999 as applicable 70 = color banded, 5 bands ( 1 %) 80 = color banded, 4 bands ( 2 %) 88 = hot solder dip special temperature coefficient (3) bf = tin/lead, bulk re = tin/lead, t/r (full) r6 = tin/lead, t/r (1000 pieces)
cmf industrial www.vishay.com vishay dale revision: 02-may-13 2 document number: 31018 for technical questions, contact: ff2aresistors@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 notes (1) lead length for product in bulk pack. for product supplied in tape and re el, the actual lead length would be based on the body size, tape spacing and lead trim. (2) available with 0.032" (0.813 mm) lead [cmf60..95] (3) 0.260" 0.020" (6.60 mm 0.51 mm) for values > 5 m ? dimensions in inches (millimeters) global model a b c (max.) d cmf50 0.150 0.020 (3.81 0.51) 0.065 0.015 (1.65 0.38) 0.187 (4.75) 0.016 0.002 (0.41 0.05) cmf55 0.240 0.020 (3) (6.10 0.51) 0.090 0.008 (2.29 0.20) 0.290 (7.37) 0.025 0.002 (0.64 0.05) cmf60 0.344 0.031 (8.74 0.79) 0.145 0.015 (3.68 0.38) 0.425 (10.80) 0.025 0.002 (2) (0.64 0.05) cmf65 0.562 0.031 (14.27 0.79) 0.180 0.015 (4.57 0.38) 0.687 (17.45) 0.025 0.002 (0.64 0.05) cmf70 0.562 0.031 (14.27 0.79) 0.180 0.015 (4.57 0.38) 0.687 (17.45) 0.032 0.002 (0.81 0.05) cmf07 0.240 0.020 (6.10 0.51) 0.090 0.008 (2.29 0.20) 0.290 (7.37) 0.025 0.002 (0.64 0.05) cmf20 0.375 0.040 (9.53 1.02) 0.145 0.015 (3.68 0.38) 0.425 (10.80) 0.032 0.002 (0.81 0.05) technical specifications parameter unit cmf50 cmf55 cmf07 cmf60 cmf20 cmf65 cmf70 maximum working voltage v ??? 200 ? 250 ? 250 ? 500 ?? 500 ? 500 ? 500 insulation voltage (1 min) v eff > 500 voltage coefficient (max.) ppm/v 5 (measured between 10 % and full rated voltage) dielectric strength v ac 450 450 450 750 750 900 900 insulation resistance ??? 10 11 operating temperature range c - 55 to + 175 terminal strength (pull test) lb 2 2 5 2 5 2 5 noise db 0.10 v/v over a decade of frequency, with low and intermediate resistance values typically below 0.05 v/v weight (max.) g 0.12 0.28 0.28 0.50 0.60 1.00 1.10 temperature coefficient codes global tc code historical tc code temperature coefficient e t-9 25 ppm/c h t-2 50 ppm/c k t-1 100 ppm/c l t-0 150 ppm/c n t-00 200 ppm/c b d c (max.) 1.500 0.125 (1) (38.10 3.18) a
cmf industrial www.vishay.com vishay dale revision: 02-may-13 3 document number: 31018 for technical questions, contact: ff2aresistors@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 load life shift due to power and derating (at 70 c and at + 125 c) the power rating for the cmf parts is tied to the derating temperature, th e heat rise of the parts, and the ? r for the load life performance. when the tables/graphs below are used together they show that when the parts are run at their higher power ratings, the parts w ill run hotter, which has the potential of causing th e resistance of the parts to shift more over the life of the part. load life shift vs. power rating load life maximum ? r (typical test lots) 0.15 % 0.5 % 1.0 % 0.15 % 0.5 % 1.0 % model power rating at + 70 c power rating at + 125 c cmf50 1/20 w and 1/10 w 1/8 w 1/4 w 1/20 w 1/10 w 1/8 w cmf55, cmf07 1/10 w and 1/8 w 1/4 w 1/2 w 1/10 w 1/8 w 1/4 w cmf60, cmf20 1/8 w and 1/4 w 1/2 w 3/4 w and 1 w 1/8 w 1/4 w 1/2 w cmf65 1/4 w and 1/2 w 3/4 w 1 w 1/4 w 1/2 w 3/4 w cmf70 1/4 w and 1/2 w 3/4 w 1 w 1/4 w 1/2 w 3/4 w cmf resistors have an operating temperature range of - 55 c to + 175 c. they must be derated at high ambient temperatures according to the derating curve. example: ? when a cmf55 part is run at 1/8 w in a 70 c ambient environment, the resistor will ge nerate enough heat that the surface tempe rature of the part will reach about 19 c over the ambient temperature, and over the life of the part this could cause the resistance val ue to shift up to 0.15 %. ? if the same resistor was instead run at 1/4 w in a 70 c environmen t, the element will heat up to about 30 c over ambient, and over the life of the part the resistance value could shift roughly 0.5 %. ? and if the resistor was run at it maximum po wer rating of 1/2 w in a 70 c environment, it will heat up to about 58 c over amb ient, and you could see the resistance value shift roughly 1 % over the life of the part. ambient temperature in c derating 120 100 80 60 40 20 0 % n i r e w o p d e t a r - 55 - 50 - 25 0 25 70 75 100 125 150 165 175 50 200 applied power in w thermal resistance 120 100 80 60 40 20 0 heat rise (c above ambient) 0 0.125 0.25 0.375 0.5 0.75 0.875 1 1.125 0.625 cmf50 cmf55, cmf07 cmf60, cmf20 cmf65, cmf70 material specifications element: vacuum-deposited nickel-chrome alloy coating: flame retardant epoxy, formulated for superior moisture protection core: fire-cleaned high purity ceramic solderability: continuous satisfactory coverage when tested in accordance with mil-r-10509
cmf industrial www.vishay.com vishay dale revision: 02-may-13 4 document number: 31018 for technical questions, contact: ff2aresistors@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 special modifications 1. terminals may be supplied in any commercial material wi th several type finishes. 2. special pre-conditioning (power aging, temperature cycling, etc.) to customer specifications. 3. non-helixed resistors can be supplied fo r critical high frequency applications. 4. fusible, flameproof versions available. note ? cmf07 and cmf20 parts are marked with colo r bands, either per mil-prf-22684 (with a wi de white band) or us ing commercial color bands. cmfxx..70 and cmfxx..80 parts are marked using commercial color bands. marking temperature coefficient: t00 = 200 ppm, t0 = 150 ppm, t1 = 100 ppm, t2 = 50 ppm, t9 = 25 ppm cmf50: (3 lines) cmf55, cmf 60, cmf65, cmf70: (4 lines) 3.01 value cmf55 style and size k 1 % ohm, k or m sign and tolerance 49.9 k ? value 1208 4-digit date code 1 % t2 tolerance and tc 1208 4-digit date code performance test ? (test methods - mil-std-202) at + 70 c at + 125 c maximum ? r (typical test lots) short time overload 0.05 % 0.05 % low temperature operation 0.05 % 0.05 % moisture resistance 0.05 % 0.05 % shock 0.01 % 0.01 % vibration 0.04 % 0.04 % temperature cycling 0.15 % 0.15 % load life varies based on power rating used; see load life shift due to power and derating table dielectric withstanding voltage 0.01 % 0.01 % effect of solder 0.03 % 0.03 %
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