1、BRITISH STANDARD BS CECC 40101019: 1977 Specification for Fixed low power non-wirewound insulated resistors TypicalConstruction: metal oxide film, helically cut Fullassessment level UDC 621.37/.39:621.316.849BSCECC40101019:1977 BSI 09-1999 ISBN 0 580 09349 2 Amendments issued since publication Amd.
2、No. Date CommentsBSCECC40101019:1977 BSI 09-1999 i Contents Page 1 Ratings (including limiting conditions of use) and characteristics 2 2 Marking of the component and package 2 3 Related documents 3 4 Ordering information 3 5 Certified test records (CTR) 3 6 Additional information (not for inspectio
3、n purposes) 3 7 Inspection requirements 3 Table 1 Dimensions and ratings 1BSCECC40101019:1977 ii BSI 09-1999 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British
4、Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to8 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be ind
5、icated in the amendment table on the inside front cover.BSCECC40101019:1977 BSI 09-1999 1 NOTE 1For ordering information seeclause4. NOTE 2When resistors are supplied in tape packaged form the length of the terminations and taping dimensions shall be by agreement between the purchaser and the suppli
6、er. NOTE 3All quality assessment is performed on the component before tape packaging. The effect of the tape packaging on the subsequent operation of the component is not assessed. Table 1 Dimensions and ratings ELECTRONIC COMPONENTS OF ASSESSED QUALITY IN ACCORDANCE WITH BS E9110:1974 AND BS E9111:
7、1975 CECC40000:1973 and CECC40100:1974 Outline and dimensional data (seenotes2 and4 andTable 1) Third angle projection FIXED LOW POWER NON-WIREWOUND RESISTORS INSULATED TYPICAL CONSTRUCTION: METAL OXIDE FILM HELICALLY CUT FULL ASSESSMENT Style (seenote3) Rated dissipation (W at70 C) % R/R % (Seeclau
8、se1) Limiting element voltage Vd.c. ora.c.r.m.s. Isolation voltage Vd.c. or a.c.peak Maximum dimensions d L D Min. Nom. Max. G* F* E* D* C* 0.04 0.125 0.063 0.250 0.125 0.50 0.25 1.00 0.5 2.0 1 2 1 2 1 2 1 2 1 2 100 175 125 250 175 350 250 500 350 700 250 350 500 700 1000 4.1 7.2 10 15.1 18.5 1.8 2.
9、5 3.8 5.1 8.5 0.45 0.55 0.75 0.75 0.75 0.5 0.6 0.8 0.8 0.8 0.55 0.66 0.88 0.88 0.88 NOTE 4All dimensions are in millimetres. NOTE 5Asterisk (*) to be replaced by the letter appropriate to the temperature characteristic.BSCECC40101019:1977 2 BSI 09-1999 1 Ratings (including limiting conditions of use
10、) and characteristics These resistors are suitable for printed wiring applications. The range of values available in each style is given in PD9002. 1.1 Derating. Resistors covered by this specification are derated linearly from100% of rated dissipation at70 C to35.3% of rated dissipation at125 C. Th
11、e dissipation below70 C is the rated dissipation. Critical resistance for all styles shall be taken as approximately24k7 at both ratings. 2 Marking of the component and package The marking of the component and package shall be in accordance with the requirements of2.4 of BSE9110:1974. Resistance ran
12、ge The preferred values are those of the E24series of BS2488:1966 (IEC Publication63). Where the use of intermediate values is essential they should be chosen in that document Standard selection tolerances 5%, 2%, 1% Environmental classification 55/125/56 Vibration severity 10Hz to500Hz,0.75mm or98m
13、/s 2 Low air pressure 8.5kPa(85mbar) Limit of resistance change after 1% at lower rating 1000h endurance test 2% at upper rating Temperature characteristic of resistance (+20 C to+70 C) For RW 107 % R/Ru 0.50% ( 100p.p.m./ C) For Z 1.25% ( 250p.p.m./ C) For X For57u R 107 % R/R u 1.0%( 200p.p.m./ C)
14、 For Z 2.5%( 500p.p.m./ C) For X Not specified for R57BSCECC40101019:1977 BSI 09-1999 3 3 Related documents 4 Ordering information Orders for resistors covered by this specification shall contain the following information: a) rated resistance; b) tolerance on rated resistance; c) style (seeTable 1)
15、and number of this detail specification. 5 Certified test records (CTR) Certified test records shall be prepared in accordance with2.8 of BS9000-1. 6 Additional information (not for inspection purposes) 6.1 Bending of wire terminations. Bending of a termination should not occur at a point less than2
16、mm from the point of emergence of the termination. The minimum bend radius should be the diameter of the termination. 6.2 Maximum surface temperature. The maximum surface temperature will be as follows: 7 Inspection requirements 7.1 An inspection lot shall consist of resistors of the same style. It
17、should be representative of those extremes of the resistance range produced during the period. Styles having the same nominal dimensions but different temperature characteristics of resistance produced during the period may be aggregated, except for the purposes of subgroups which contain a test for
18、 temperature characteristics of resistance. The extremes or any critical value of the ranges of resistance and temperature characteristics of resistance for which Qualification Approval has been granted shall be inspected during a period which is approved by the National Supervising Inspectorate. Th
19、e samples for groups “C” and “D” shall be collected over the last13weeks of the inspection period. “Low” values shall be within+200%,0% of the lowest currently approved resistance value (orlowestvalue manufactured within the approval range). “High” values shall be within+0%,30% of the highest curren
20、tly approved resistance value (orhighestvalue produced within the approval range). “Critical” values shall be within+0%,20% of the calculated value. 7.2 Samples submitted to tests which are marked “(D)” shall not be accepted for release under BS9000 (see2.6.5 of BS9000-1). 7.3 Components to be teste
21、d at125 C for endurance will be tested at the category dissipation. BS2011 (IEC68) Methods for the environmental testing of electronic components and electronic equipment BS2488 (IEC63) Schedule of preferred numbers for the resistance of resistors and the capacitance of capacitors for telecommunicat
22、ion equipment BS6001 (IEC410) Sampling procedures and tables for inspection by attributes. (BS9001 has the same technical content.) BS9000 General requirements for electronic components of assessed quality BSE9110 (CECC40000) Harmonized system of quality assessment for electronic components:Generic
23、specification for fixed resistors BSE9111 (CECC40100) Harmonized system of quality assessment for electronic components: Sectional specification for fixed low power non-wirewound resistors PD9002 BS9000 component selection guide Styles C and D: 200 C Styles E and F : 180 C Style G : 100 CBSCECC40101
24、019:1977 4 BSI 09-1999 7.4 Where a subgroup contains more than one test, they shall be carried out in the order given in the schedule. Clause number and test D or ND Condition of test IL AQL Performance requirements (seenote1) (seenote3) (seenote2) (seenote1) GROUP A INSPECTION To be conducted on a
25、sampling basis, lot-by-lot Subgroup A1 ND S-4 1.0% 4.3.1 4.3.2 Visual examination Marking As in4.3.1 As in4.3.2 Subgroup A2 ND S-4 1.0% 4.3.3 4.4 Dimensions (gauging) Resistance A gauge plate of1.5mm shall be used As specified in Table 1 As in4.4.2 CTR information Attributes information for the resi
26、stance test in subgroup A2 GROUP B INSPECTION To be conducted on a sampling basis, lot-by-lot Subgroup B1 ND S-3 1.0% 4.6 Voltage proof As in4.6.3 Subgroup B2 D S-3 2.5% 4.15.1 Soldering and Solderability Solder bath method As in4.15.1 4.11 Overload Test duration Rated dissipation 5s 15s 0.125W to0.
27、75 W 1W to2W The applied voltage shall be2.5times the rated voltage or twice the limiting element voltage, whichever is the less 4.11.3 4.11.4 Visual examination Resistance As in4.11.3 % R/Ru (0.5% +0.057) CTR information Attributes information for the tests in subgroups B1 and B2BSCECC40101019:1977
28、 BSI 09-1999 5 Clause number and test D or ND Condition of test p n c Performance requirements (seenote1) (seenote3) (seenote1) GROUP C INSPECTION To be conducted on a sampling basis at the periodicity given in column “p” Subgroup C1 D 3 20 1 4.14 4.15.2 Robustness of terminations Soldering Resistan
29、ce to heat i) Half of the sample Tensile, bending and torsion Visual examination Resistance Method1A of test Tb of IEC68-2-20A Visual examination Resistance ii) Other half of the sample As in4.14.6.1 % R/Ru (0.5% +0.057) As in4.15.2.4 % R/Ru (0.5% +0.057) 4.16 Rapid change of temperature T A :55 C T
30、 B :125 C Visual examination Resistance As in4.16.4 % R/Ru (0.5% +0.057) 4.19 Vibration Procedure: B4 Frequency range: 10Hz to500Hz Amplitude:0.75mm or 98m/s 2(whichever is the lesssevere) Sweep endurance: Total duration6h Resistors shall be mounted by their normal means The distance between the res
31、istor body and the mounting point on the termination shall be6 1mm Visual examination Resistance iii) All of the sample As in4.19.3 % R/Ru (0.5% +0.057)BSCECC40101019:1977 6 BSI 09-1999 Clause number and test D or ND Condition of test p n c Performance requirements (seenote1) (seenote3) (seenote1) S
32、ubgroup C1 (continued) 4.20 Climatic sequence Dry heat Damp heat, cyclic, first cycle Cold Low air pressure Damp heat, cyclic, remaining cycles D.C. load Final measurements Drying procedure 1 8.5kPa(85mbar) Visual examination Resistance Insulation resistance As in4.20.8 % R/Ru (2% +0.17) R:W 100M7 S
33、ubgroup C2 i) D 3 20 1 4.24.1 Endurance at70 C At full rating Duration1000h Examination at48h, 168h,500h and1000h Visual examination Resistance Examination at1000h Insulation resistance The tests on one sample each year shall be extended to8000h duration Examination at2000h, 4000h and8000h Resistanc
34、e 12 20 As in4.24.1.7 % R/Ru (2% +0.17) R:W 1G7 % R/R: The results obtained are for information onlyBSCECC40101019:1977 BSI 09-1999 7 Clause number and test D or ND Condition of test p n c Performance requirements (seenote1) (seenote3) (seenote1) Subgroup C2 ii) D 3 20 1 4.24.1 Endurance at70 C At l
35、ower rating Duration1000h Examination at48h,168h,500h and1000h Visual examination Resistance Examination at1000h Insulation resistance The tests on one sample each year shall be extended to8000h duration Examination at2000h, 4000h and8000h Resistance 12 20 As in4.24.1.7 % R/Ru (1% 0.17) R:W 1G7 % R/
36、R: The results are for information only Subgroup C3 ND 3 20 1 55 C to20 C 20 C to125 C 4.7 Temperature characteristic of resistance % R/R:u For Z RW 10 7 R 10 7 0.75% 1.50% 1.05% 2.10% For X RW 107 R 107 1.88% 3.75% 2.62% 5.25% R 5 7 Not specified CTR information Attributes information for the test
37、in subgroups C1, C2 and C3 Measurements information for percentage change in resistance at the prescribed times in subgroup C2BSCECC40101019:1977 8 BSI 09-1999 Clause number and test D or ND Condition of test p n c Performance requirements (seenote1) (seenote3) (seenote1) Group D Inspection To be co
38、nducted on a sampling basis at the periodicity given in column “p” Subgroup D1 D 12 20 1 4.21 Damp heat, steady state Visual examination Resistance Insulation resistance As in4.21.4 % R/Ru (2% +0.17) R:W 100M7 Subgroup D2 i) D 36 20 1 4.3.4 4.24.3 Dimensions (detail) Endurance at upper category temp
39、erature At full rating Duration:1000h Examination at48h, 168h,500h and1000h Visual examination Resistance Examination at1000h Insulation resistance As specified in Table 1 As in4.24.3.7 % R/Ru (2% +0.17) R:W 1G7 Subgroup D2 ii) 36 20 1 4.24.3 Endurance at upper category temperature At lower rating D
40、uration:1000h Examination at48h, 168h,500h and1000h Visual examination Resistance Examination at1000h Insulation resistance As in4.24.3.7 % R/Ru (1% +0.17) R:W 1G7 CTR information Attributes information for the tests in subgroups D1 and D2. Measurements information for percentage change in resistanc
41、e at the prescribed times for the endurance tests in subgroup D2 NOTE 1Clause numbers of tests and performance requirements refer to BSE9110:1974. NOTE 2Inspection levels and AQLs are selected from BS6001. NOTE 3In this table:D = destructive ND = non-destructive p = periodicity (in months) n = sampl
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