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1、BRITISH STANDARD BS 9074 N002:1974 Incorporating Amendment Nos. 1, 2, 3, 4 and 5 Detail specification for Fixed polystyrene foil dielectric capacitors Tabular insulated case, axial terminations Full assessment level UDC 621.39.03:621.319.4:621.315.616.9 416 Licensed Copy: London South Bank Universit
2、y, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 BSI 01-2000 ISBN 0 580 08042 0 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct app
3、lication. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 11 and a back cover. This standard has been updated (see copyright date) and may have had
4、amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.Date of issueComments 1647April 1975 3210January 1980 3861December 1981 4101November 1982 7411January 1993Indicated by a sideline in the margin Licensed Copy:
5、 London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 BSI 01-2000i Contents Page 1Constructional details1 2Ratings and dimensions1 3Environmental severities3 4Marking3 5Related documents3 6Additional information3
6、 7Ordering information3 8Inspection requirements4 Table 1 Tolerances on capacitance range1 Table 2 Ratings and dimensions (mm)2 Table 3 Performance requirements11 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
7、 ii blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 BSI 01-20001 1 Constructional details 1.1 Termination wires may be offset. 1.2 Twisted pairs may be used to provide 1.0 mm dnom leadou
8、ts, provided the overall maximum dimension does not exceed 1.1 mm. 1.3 An axial projection 4 mm diameter by 4 mm long (maximum) is permissible to allow for any attachment device for terminations. 2 Ratings and dimensions See Table 1 and Table 2 Table 1 Preferred tolerances on capacitance range ELECT
9、RONIC COMPONENTS OF ASSESSED QUALITY: DETAIL SPECIFICATION FIXED CAPACITOR POLYSTYRENE FOIL DIELECTRIC CLASSIFICATION 40/070/A4 TUBULAR INSULATED CASE AXIAL TERMINATIONS All dimensions are in millimetresFULL ASSESSMENT Capacitance rangeRated voltage (V)Tolerances 2 pF to 13 pF 25, 160, 630, 2 500 1
10、pF, 2 pF, 3 pF 14 pF to 20 pF 1 pF, 2 pF, 3 pF, 5 pF 21 pF to 100 pF 2 pF, 3 pF, 5 pF, 10 pF 100 pF to 200 pF 1 pF, 2 pF, 2.5 %, 5 %, 10 % 200 pF to 1 000 pF 1 nF to 20 nF 20 nF to 100 nF 25, 63, 160, 400, 630, 2 500 0.5 %, 1 %, 2 %, 2.5 % 100 nF to 200 nF25, 63, 160, 400, 630 5 %, 10 %, 20 % 200 nF
11、 to 500 nF25, 63, 160 NOTEOther tolerances may be supplied. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 2 BSI 01-2000 Table 2 Ratings and dimensions (mm) NOTE 1Capacitor dimensions vary di
12、rectly with capacitance value and cannot be stated within narrow limits. The outside diameter may vary appreciably from batch to batch due to variations in thickness of dielectric. Consequently, maximum dimensions of each range are indicated. NOTE 2The tolerance on dnom is + 10 % 0.05 mm (see 1.1.12
13、 4) of BS 9070:Section 1 and Section 2). Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 BSI 01-20003 3 Environmental severities 4 Marking 4.1 Where BS 1852 is not used, the units of capacitan
14、ce may only be omitted if the value is given in pF. 4.2 The indication of the unit of tolerance may only be omitted if the value of rated capacitance is given in pF for values u 100 pF and in % for values 100 pF. 4.3 The termination connected to the outer foil shall be identified if called for in th
15、e ordering information. 5 Related documents BS 1852, Marking codes for values and tolerances of resistors and capacitors. (IEC 62) BS 2011, Methods for the environmental testing of electronic components and electronic equipment. (IEC 68). BS 3763, The International System of units (SI). BS 6001, Sam
16、pling procedures and tables for inspection by attributes. (IEC 410) BS 9000, General requirements for electronic components of assessed quality. BS 9002, Qualified products list. BS 9070, Fixed capacitors of assessed quality. (IEC 384-1) 6 Additional information Not for inspection purposes. 6.1 Bend
17、ing of terminations. Termination wires should not be bent closer than 4 mm to the body (including the projection, if any) (Lmax), to avoid damaging the end seal. 7 Ordering information When ordering capacitors to this detail specification the following information shall be given: 1) Capacitance valu
18、e and tolerance (see Clause 2). 2) Rated voltage. 3) BS number of this detail specification. 4) The outer foil termination to be marked (if required). Example: 20 nF 1 % 400 V, with outer foil marking, to BS 9074 N002. Environmental classification40/070/A4 Temperature coefficient 140 80 p.p.m./C Rat
19、ed temperature70 C Vibration severity0.75 mm or 98 m/s2; 10 Hz to 500 Hz Bump severity390 m/s2; 1 000 10 bumps Low air pressure2 kN/m2(20 mbar) Solderability2 s, without ageing, outside a minimum distance of 5 mm of the body (including the projection, if any) Resistance to soldering heat350 C with a
20、 heat shield 2 mm from the body (including the projection, if any) e.g. 500/2 is 500 pF 2 % 50/2 is 50 2 pF Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 4 BSI 01-2000 8 Inspection requireme
21、nts 8.1 The capacitors covered by this specification shall be tested to the inspection requirements given below. 8.2 This schedule gives the appropriate tests from BS 9070:Section 4 or, where appropriate, to Section 1. For additional details reference must be made to BS 9070:Section 1. Tests shall b
22、e performed in the order in which they appear in this schedule. 8.3 Samples submitted to tests marked “(D)” shall not be accepted for release under BS 9000 (see 2.6.5 of BS 9000-1). 8.4 The climatic sequence to be carried out at the next tighter AQL in the event of failure to meet the requirements o
23、f subgroup C3. Inspection BS 9070:Section 1 or Section 4 reference and conditions of test Performance requirements where not otherwise specified Group A Subgroup A0 Voltage proof4.2.4.2 To be applied on a sampling basis, lot-by-lot Subgroup A4 is not applicable 100 % inspection Test point A only; du
24、ration 1 s minimum No breakdown or flashover Subgroup A1 Visual examination1.2.2 Inspection level I, AQL 1.5 % As 1.2.2 Subgroup A2 Capacitance4.2.4.3 Inspection level II, AQL 0.65 % As Table 3 Code A Subgroup A3 Tangent of loss angle Insulation resistance 1.2.4.4 4.2.4.7 Inspection level I, AQL 1.5
25、 % Test Point A only As Table 3 Code B As Table 3 Code C Subgroup A5 CTR information4.1.11Attributes information for subgroups A1, A2 and A3 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 BSI
26、 01-20005 Inspection BS 9070:Section 1 or Section 4 reference and conditions of test Performance requirements where not otherwise specified GROUP B Subgroup B1 Dimensions1.2.3.1 To be applied on a sampling basis, lot-by-lot Subgroups B3 to B6 are not applicable Inspection level S-4, AQL 4.0 % As 1.2
27、.3.1 Subgroup B2 (D)Inspection level S-3, AQL 4.0 % (See 8.4 above) Initial measurements Capacitance Tangent of loss angle Insulation resistance Robustness of terminations Solderability (without ageing) Climatic sequence Final measurements Visual examination Capacitance Tangent of loss angle Insulat
28、ion resistance Outer foil terminations 4.2.4.3 1.2.4.4 4.2.4.7 1.2.6.1 4.2.6.2 (1) 4.2.6.8 1.2.2 4.2.4.3 1.2.4.4 4.2.4.7 1.2.4.9 Method 3, solder globule As Table 3 Code A As Table 3 Code B As Table 3 Code C As Table 3 Codes D and E As Table 3 Code F As Table 3 Code G As Table 3 Code H Licensed Copy
29、: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 6 BSI 01-2000 Inspection BS 9070:Section 1 or Section 4 reference and conditions of test Performance requirements where not otherwise specified Subgroup B7(D
30、)Inspection level S-4, AQL 1.5 % Initial measurements Capacitance Tangent of loss angle Insulation resistance Endurance Final measurements Visual examination Capacitance Tangent of loss angle Insulation resistance 4.2.4.3 1.2.4.4 4.2.4.7 4.2.7 1.2.2 4.2.4.3 1.2.4.4 4.2.4.7 To be applied only in the
31、event of a failure in subgroup C5 48 h duration As Table 3 Code A As Table 3 Code B As Table 3 Code C As Table 3 Codes D and E As Table 3 Code F As Table 3 Code G As Table 3 Code H Subgroup B8 CTR information4.1.11Attributes information for subgroups B1, B2 and B7 GROUP C To be applied on a sampling
32、 basis at three-monthly intervals Subgroup C2 not applicable Subgroup C1(D)Inspection level S-3, AQL 6.5 % Inductance Preliminary drying Temperature coefficient and cyclic drift 1.2.4.8 1.2.4.1 1.2.4.10 Applicable only where C 500 pFShall not be greater than twice the inductance of a wire 0.20 mm di
33、ameter and of length equal to that of the capacitor and its terminations 140 80 p.p.m./C. Not greater than 0.75 pF for C u 100 pF 0.5 % for C 100 pF Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:
34、1974 BSI 01-20007 Inspection BS 9070:Section 1 or Section 4 reference and conditions of test Performance requirements where not otherwise specified Subgroup C3(D)Inspection level S-3, AQL 6.5 % Initial measurements Capacitance Tangent of loss angle Insulation resistance Damp heat, steady state Final
35、 measurements Visual examination Capacitance Tangent of loss angle Insulation resistance 4.2.4.3 1.2.4.4 4.2.4.7 4.2.6.9 1.2.2 4.2.4.3 1.2.4.4 4.2.4.7 As Table 3 Code A As Table 3 Code B As Table 3 Code C As Table 3 Codes D and E As Table 3 Code F As Table 3 Code G As Table 3 Code H Subgroup C4Inspe
36、ction level S-4, AQL 4.0 % Insulation resistance 4.2.4.7At 70 C, Test point A only (See 1.2.1) 1 000 s for C 100 nF 10 G7 for C u 100 nF Subgroup C5(D)Inspection level S-3, AQL 4.0 % Initial measurements Capacitance Tangent of loss angle Insulation resistance Endurance Damp heat, cyclic Final measur
37、ements Visual examination Capacitance Tangent of loss angle Insulation resistance 4.2.4.3 1.2.4.4 4.2.4.7 4.2.7 4.2.6.8 (6) 1.2.2 4.2.4.3 1.2.4.4 4.2.4.7 1 000 h 1 cycle As Table 3 Code A As Table 3 Code B As Table 3 Code C As Table 3 Codes D and E As Table 3 Code F As Table 3 Code G As Table 3 Code
38、 H Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 8 BSI 01-2000 Inspection BS 9070:Section 1 or Section 4 reference and conditions of test Performance requirements where not otherwise specifi
39、ed Subgroup C6 CTR information4.1.11Attributes information for subgroups C1, C3 and C4. Measurements information for Capacitance, Tangent of loss angle, Insulation resistance for subgroup C5 GROUP DTo be applied on a sampling basis at three-yearly intervals Subgroup D3 and D4 not applicable Subgroup
40、 D1(D)Inspection level S-3, AQL 4.0 % Initial measurements Capacitance Tangent of loss angle Insulation resistance Subgroup D1 (i) Robustness of terminations Visual examination Resistance to soldering heat Visual examination Subgroup D1 (ii) Vibration Visual examination 4.2.4.3 1.2.4.4 4.2.4.7 1.2.6
41、.1 1.2.2 4.2.6.2 (2) 1.2.2 4.2.6.7 1.2.2 Minimum sample size 13 Approximately 50 % of the specimens (minimum 7) Method 1, solder bath, 350 C Remainder of the specimens (minimum 6) Procedure B4, 3 h in one sense radially, 3 h in one sense axially. For Lmax 12.5 mm: Both body and terminations clamped
42、For patterns Lmaxu 12.5 mm: Wires only clamped As Table 3 Code A As Table 3 Code B As Table 3 Code C As Table 3 Code D As Table 3 Code D As Table 3 Code D Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074
43、 N002:1974 BSI 01-20009 Inspection BS 9070:Section 1 or Section 4 reference and conditions of test Performance requirements where not otherwise specified Subgroup D1 (ii) Bump Visual examination 1.2.6.4 1.2.2 At room temperature 1 000 10 bumps The sample shall be equally divided between each of the
44、three perpendicular planes. For Lmax 12.5 mm: Both body and terminations clamped For patterns Lmaxu 12.5 mm: Wires only clamped As Table 3 Code D Subgroup D1 (iii) Rapid change of temperature Climatic sequence Final measurements Visual examination Capacitance Tangent of loss angle Insulation resista
45、nce 4.2.6.3 4.2.6.8 1.2.2 4.2.4.3 1.2.4.4 4.2.4.7 Specimens from (i) to (ii) combined As Table 3 Codes D and E As Table 3 Code F As Table 3 Code G As Table 3 Code H Subgroup D2(D)Inspection level S-3, AQL 4.0 % Initial measurements Capacitance Tangent of loss angle Insulation resistance Endurance Da
46、mp heat, cyclic 4.2.4.3 1.2.4.4 4.2.4.7 4.2.7 4.2.6.8 (6) Duration 2 000 h 1 cycle As Table 3 Code A As Table 3 Code B As Table 3 Code C Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:27:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9074 N002:1974 10 BSI
47、01-2000 Inspection BS 9070:Section 1 or Section 4 reference and conditions of test Performance requirements where not otherwise specified Subgroup D2 Final measurements Visual examination Capacitance Tangent of loss angle Insulation resistance (D) 1.2.2 4.2.4.3 1.2.4.4 4.2.4.7 As Table 3 Codes D and
48、 E As Table 3 Code F As Table 3 Code G As Table 3 Code H Subgroup D5(D)Inspection level S-3, AQL 4.0 % Initial measurements Capacitance Tangent of loss angle Insulation resistance Storage at low temperature Final measurements Visual examination Voltage proof Capacitance Insulation resistance 4.2.4.3
49、 1.2.4.4 4.2.4.7 4.2.6.11 (2) 1.2.2 4.2.4.2 4.2.4.3 4.2.4.7 At lower category temperature Test points A and C As Table 3 Code A As Table 3 Code B As Table 3 Code C No mechanical damage likely to affect the performance. Hair line cracks on polystyrene surface may be ignored No breakdown or flashover As Table 3 Code F As Table 3 Code C Subgroup D6 CTR information4.1.11Attributes information for subgroups D1, D2 and D5. Measurements information shall be given for Capacitance, Tangent of loss