cmb 0207 vishay beyschlag document number: 28755 for technical questi ons, contact: ff3bres istors@vishay.com www.vishay.com revision: 31-oct-06 79 high pulse load melf resistor cmb 0207 speciality melf resistors with advanced pulse load capability are the perfect choice for the protection of circuitry with signal and mains input lines from surge pulses. the resistors are also suitable for circuits exposed to high levels of electromagnetic in terference or electro-static discharge. the applications are in all fields of automotive, telecommunication, industrial and medical equipment. features ? approved to the safety requirements of iec 60065, 14.1.a* (= vde 0860, 14.1.a) vde-reg.-nr. b583 ? special carbon film technology ? up to 10 kv or 17 kw single pulse capability ? up to tbf. continuous pulse load capability ? esd capability: 16 kv, human body model ? compatible with lead (pb)-free and lead containing soldering processes ? lead (pb)-free and rohs compliant applications ? automotive ? telecommunication ? industrial ? medical equipment notes ? these resistors do not feature a limited lifetime when operated wi thin the permissible limits. ho wever, resistance value drift increasing over operating time may result in exceeding a limi t acceptable to the specific application, thereby establ ishing a functional lifeti me. 1. the power dissipation on the resistor gener ates a temperature rise against the lo cal ambient, depending on the heatflow suppo rt of the printed-circuit board (thermal re sistance). the rated dissipation applies only if t he permitted film temperature is not exceede d. furthermore, a high level of ambient temperature or of power dissipation may raise the temperature of the solder joint, hence special solder a lloys or board materials may be required to maintain the reliability of the assembly. 2. specified power rating requi res dedicated heat-sink pads. 3. film temperatures above the specified range may be permi ssible, e.g. 175 c. please cont act the factory for details. reg.-nr. b583 metric size din: 0207 cecc: rc 6123m technical specifications description cmb 0207 cecc size rc 6123m resistance range 2.2 to 1.5 m resistance tolerance 5 %; 2 % temperature coefficient see tcr graph operation mode standard power climatic category (lct/uct/days) 55/125/56 55/155/56 rated dissipation, p 70 1) 0.4 w 1.0 w operating voltage, u max ac/dc 500 v film temperature 3) 125 c 155 c max. resistance change at p 70 for resistance range, 2.2 to 10 k | r / r | after: 1000 h 0.5 % 1 % 8000 h 1 % 2 % 225 000 h t.b.f - permissible voltage against ambient (insulation): 1 minute; u ins 750 v continuous 75 v failure rate 1 10 -9 /h
cmb 0207 vishay beyschlag high pulse load melf resistor www.vishay.com for technical questions , contact: ff3bresistors@vishay.com document number: 28755 80 revision: 31-oct-06 12nc information ? the resistors have a 12-digit numeric code starting with 2312 ? the subsequent 4 digits indicate the resistor type, specification and packaging; see the 12nc table ? the remaining 4 digits indica te the resistance value: ? the first 3 digits indicate the resistance value ? the last digit indicates the resistance decade in accordance with the 12nc indicating resistance decade table last digit of 12nc indi cating resistance decade 12nc example the 12nc of a cmb 0207 resistor, value 47 k with 2 % tolerance, supplied in blister tape of 2000 units per reel is: 2312 199 24703. notes 1. products can be ordered using either the product description or the 12nc. 2. the part number is shown to facilitate the introduction of the unified part numbering system. currently, this part number is applicable in the americas and in asia/pacific only. 3. please refer to table packaging, see below. 4. for cmb 0207 the temperature coefficient is not identified in the product description. resistance decade last digit 1 to 9.99 8 10 to 99.9 9 100 to 999 1 1 k to 9.99 k 2 10 k to 99.9 k 3 100 k to 999 k 4 1 m to 9.99 m 5 12nc - resistor type and packaging description ordering code 2312 ... ..... blister tape on reel type tol. b2 2000 units b7 7000 units cmb 0207 5 % ... 199 3.... ... 189 3.... 2 % ... 199 2.... ... 189 2.... part number and product description 1) part number 2) : cmb02070x4701gb200 cmb0207 0x 4701gb200 model/size special character tcr value tolerance pac k ag i n g 3) special cmb0207 0 = neutral x = no indication 3 digit value 1 digit multiplier multiplier 8 = *10 -2 9 = *10 -1 0 = *10 0 1 = *10 1 2 = *10 2 3 = *10 3 4 = *10 4 g = 2 % j = 5 % b2 b7 up to 2 digits 00 = standard product description 4) : cmb 0207 2 % b2 4k7 cmb 0207 2 % b2 4k7 model size tolerance packaging 3) resistance value cmb 0207 2 % 5 % b2 b7 100r = 100 4k7 = 4.7 k
cmb 0207 high pulse load melf resistor vishay beyschlag document number: 28755 for technical questi ons, contact: ff3bres istors@vishay.com www.vishay.com revision: 31-oct-06 81 dimensions note 1. color code marking is applied according to iec 60062* in f our bands. each color band appears as a single solid line, voids ar e permissible if at least 2/3 of the band is visible from each radial angle of view. the last colo r band for tolerance is approximately, 50 % wider than the other bands. a brown interrupted band between the 2nd and 3rd full band indicates the special carbon film type. note 2. please select resistance values for 5 % and 2 % tolerance from the e24 series. packaging model blister tape on reel acc. iec 60286-3 diameter pieces/reel code cmb0207 180 mm/7" 2000 b2 330 mm/13" 7000 b7 l d l 1 k d 1 color code marking 1) dimensions - melf resistor types, mass and relevant physical dimensions type l (mm) d (mm) l 1 min (mm) d 1 (mm) k (mm) mass (mg) cmb 0207 5.8 + 0/- 0.15 2.2 + 0/- 0.2 3.2 d + 0/- 0.2 1.15 0.1 79 tolerance and resistance range description resistance value 2) tolerance cmb 0207 5 % 2.2 to 15 2 % 16 to 1.5 m
cmb 0207 vishay beyschlag high pulse load melf resistor www.vishay.com for technical questions , contact: ff3bresistors@vishay.com document number: 28755 82 revision: 31-oct-06 description production of the cmb 0207 speciality melf resistor is strictly controlled and follows an extensive set of instructions established for reproducib ility. a homogeneous and dense carbon film is deposited on a high grade ceramic body (96 % al 2 o 3 ). nickel plated steel termination caps are firmly pressed on the coated rods. products with a resistance of 15 or lower are made without trimming, whereas a special laser is used to achieve a target value of 16 or above by smoothly cutting a helical groove in the resistive layer without damaging the ceramics. the resistor elements are covered by a protective coat ing designed for electrical, mechanical and climatic protection. the terminations receive a final pure tin on nickel plating. four color code rings designate the resistance value and tolerance in accordance with iec 60 062 3) . the result of the determined production is verified by an extensive testing procedure performed on 100 % of the individual resistors. only accepted products are laid directly into the blister tape in accordance with iec 60 286-3 3) . assembly the resistors are suitable for processing on automatic smd assembly systems. they are suitable for automatic soldering using wave, reflow or vapour phase as shown in iec 61760-1 3) . excellent solderability is proven, even after extended storage in excess of 10 years. the encapsulation is resistant to all cleaning solvents commonly used in the electronics industry, including alcohols, esters and aqueous solutions. the resistors are completely lead (pb)-free, the pure tin plating provides co mpatibility with lead (pb)-free soldering processes. the immuni ty of the plating against tin whisker growth has been proven under extensive testing. all products comply with the gadsl 1) and the cefic- eeca-eicta 2) list of legal restrictions on hazardous substances. this includes full compliance with the following directives: ? 2000/53/ec end of vehicle life directive (elv) and annex ii (elv ii) ? 2002/95/ec restriction of the use of hazardous substances directive (rohs) ? 2002/96/ec waste electrical and electronic equipment directive (weee) notes 1. global automotive declarable substance list, see www.gadsl.org 2. cefic (european chemical i ndustry council), eeca (european electronic component manufactu rers association), eicta (european trade organisation repr esenting the information and communications technology and c onsumer electronics), see www.eicta.org -> issues -> environment policy -> chemicals -> chemicals for electronics approvals where applicable the resistors are tested in accordance with en 140401-803 which refers to en 60115-1, en 140400 and the variety of environmental test procedures of the iec 60068 3) series. vishay beyschlag has achieved "approval of manufacturer" in accordance with iec qc 001002-3, clause 2 . the release certificate for ?technology approval schedule? in accordance with cecc 240001 based on iec qc 001002-3, clause 6 is granted for the vishay beyschlag manufacturing process. note 3. the quoted iec standards are also released as en standards with the same number and identical contents.
cmb 0207 high pulse load melf resistor vishay beyschlag document number: 28755 for technical questi ons, contact: ff3bres istors@vishay.com www.vishay.com revision: 31-oct-06 83 functional performance c 100 150 - 50 0 50 70 deratin g ambient temperature amb ? 0 0.5 1 w power dissipation p po w er operation mode standard operation mode 1) 1) specified po w er rating re qu ires dedicated heat sink pads 1.2/50 pulse resistance value r 1 10 100 1k 10k 100k 1m 10 100 1k 10k v cmb 0207 pulse volta g e u p u lse load rating in accordance w ith iec 60115-1, 4.27; 1.2 s/50 s; 5 p u lses at 12 s inter v als; for permissi b le resistance change 0.5 % 10/700 pulse resistance value r 1 10 100 1k 10k 100k 1m 10 100 1k 10k v cmb 0207 pulse volta g e u p u lse load rating in accordance w ith iec 60115-1, 4.27; 10 s/700 s; 10 p u lses at 1 min u te inter v als; for permissi b le resistance change 0.5 %
cmb 0207 vishay beyschlag high pulse load melf resistor www.vishay.com for technical questions , contact: ff3bresistors@vishay.com document number: 28755 84 revision: 31-oct-06 temperature coefficent (tcr) resistance value r 1 10 100 1k 10k 100k 1m - 500 - 400 - 300 - 200 - 100 0 ppm/k cmb 0207 temperature coefficient alue r current noise a 1 0.01 100 0. 1 1 v / v resistance v current noise - a 1 in accordance w ith iec 60195 1k 10k 100k 1m cmb 0207 revision history compared to the prior revision of this datasheet, short rev3, the following changes have been applied: ? transfer into vishay format for publication on the internet ? introduction of a standardized part numbering system ? additional emphasis on the clean balance of material s and on the compliance with various eu directives ? revision of the 1.2/50 pulse load diagram ? introduction of diagrams on 10/700 pulse load and on current noise ? introduction of information on el ectrostatic discharge (esd) capability ? no other change of technical contents ? no product change
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