1、BRITISH STANDARD BS9074N007: 1978 Incorporating Amendment No.1 Detail specification for Fixed polystyrene film dielectric extended foil capacitors Rectangular non-metallic case, unidirectional terminations Full plus additional assessment level UDC 621.319.4:621.315.616.96:678.746.22-416BS9074 N007:1
2、978 BSI01-2000 Committee reference ECL/4 ISBN 0 580 10577 6 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 Standard does not of itself confer immunity from
3、legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to9 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front
4、 cover. Amendments issued since publication Amd. No. Date of issue Comments 3211 January1980 Indicated by a sideline in the marginBS9074 N007:1978 BSI 01-2000 i Contents Page 1 Constructional details 1 2 Ratings and dimensions 1 3 Ratings and characteristics 2 4 Marking 2 5 Related documents 2 6 Ord
5、ering information 2 7 Inspection requirements 2 Appendix A Flammability test 8 Appendix B Gauge 8 Appendix C Temperature coefficient and cyclic drift 8 Table 1 Tolerances on capacitance range 1 Table 2 Dimensions in millimetres 1 Table 3 Performance requirements 7ii blankBS9074 N007:1978 BSI 01-2000
6、 1 1 Constructional details 1.1 Standard termination length is3mm minimum unless otherwise requested. 1.2 The capacitor shall be capable of seating firmly on the printed circuit board, and the body mounting shall not seal off the holes in the printed circuit board through which the capacitor leads p
7、ass. 1.3 Silicone materials or silicone mould release agents shall not be used. 2 Ratings and dimensions Capacitance range47pF to15000pF preferably in the E192 series. Table 1 Tolerances on capacitance range Table 2 Dimensions in millimetres ELECTRONIC COMPONENTS OF ASSESSED QUALITY DETAIL SPECIFICA
8、TION IN ACCORDANCE WITH BS9074 MANUFACTURERS TYPE NUMBER SeePD9002 OUTLINE AND DIMENSIONS. THIRD ANGLE PROJECTION SeeTable 2 All dimensions are in millimetres Stand-offs and their dimensions may vary Marking information seeclause4. For ordering information seeclause6 FIXED CAPACITOR POLYSTYRENE FILM
9、 DIELECTRIC EXTENDED FOIL TYPICAL CONSTRUCTION RECTANGULAR NON-METALLIC CASE UNIDIRECTIONAL TERMINATIONS CLASSIFICATION 40/070/21 FULL ASSESSMENT PLUS ADDITIONAL Capacitance range (pF) Rated voltage (V) Minimum preferred tolerances 47 to300 63 1.5pF 300 to15000 63 0.5% Refer to Qualified Products Li
10、st PD9002 for details of manufacturers approved to this specification Capacitance range Z 1 max. Y max. Z 2 max. S 1 nominal S 2 nominal d nominal 47pF to15000pF 7.5 13.0 7.5 5.08 5.08 0.6preferred 0.5permissible NOTEThe leadout positioning tolerance shall be such that, when the leadouts are located
11、 in two1.0mm diameter holes centred on the opposing diagonal corners of a5.08mm square, the case shall be capable of being positioned within a7.62mm square concentric and parallel with the5.08mm square. A suitable gauge is shown in Appendix B.BS9074 N007:1978 2 BSI 01-2000 3 Ratings and characterist
12、ics 4 Marking 4.1 Coding in accordance with BS1852 shall be used where possible. 4.2 Capacitance and tolerance shall be marked on the opposite end to the leadouts. 5 Related documents BS1852, Marking codes for resistors and capacitors. (IEC62) BS2011, Basic environmental testing procedures. (IEC68)
13、BS3763, The International System of units (SI). BS6001, Sampling procedures and tables for inspection by attributes. (IEC410) BS9000, General requirements for electronic components of assessed quality. BS9070, Fixed capacitors of assessed quality: generic data and methods of test. PD9002, Qualified
14、products list for electronic components of assessed quality. 6 Ordering information Orders for components to this specification shall include the following minimum information: a) Capacitance value and tolerance (seeTable 1) and rated voltage. b) Quantity. c) Manufacturers type number. d) BS specifi
15、cation number, issue, date. e) Leadout length. EXAMPLE.680pF 1.25%63V BS9074 N007 7 Inspection requirements 7.1 The capacitors covered by this specification shall be tested to the inspection requirements given below. 7.2 This schedule gives the appropriate tests from BS9070:Section 4 or, where appro
16、priate, from Section1. For additional details reference should be made to BS9070:Section 1. Tests shall be performed in the order in which they appear in this schedule. 7.3 Samples submitted to tests marked “(D)” shall not be accepted for release under BS9000 (see2.6.5 of BS9000-1). 7.4 The climatic
17、 sequence shall be carried out at the next tighter AQL in the event of failure to meet the requirements of subgroup C3. Environmental classification 40/070/21 Rated temperature 70 C Bump severity 390m/s 2 ;6ms duration;1000 10bumps Vibration severity 0.75mm or98m/s 2 ;10Hz to500Hz; 6h duration Low a
18、ir pressure 8.5kPa(85mbar) Solderability Method1 or 3 of BS2011-2.1Ta:1977 Resistance to soldering heat 350 C; solder bath method, with heat shield Flammability Propane gas jet,0.5mm bore; Flame length12mm2mm 2cycles of15s. SeeAppendix A Temperature coefficient SeeAppendix CBS9074 N007:1978 BSI 01-2
19、000 3 Inspection BS9070:Section 1 or BS9070:Section 4 reference and conditions of test Performance requirements where not otherwise specified GROUP A Subgroup A0 Voltage proof 4.2.4.2 To be applied on a sampling basis, lot-by-lot Subgroup A4 is not applicable 100%inspection Test point A only; durati
20、on1s minimum No breakdown or flashover Subgroup A1 Visual examination 1.2.2 Inspection level I, AQL1.5% There shall be no resin on terminations beyond the case boundary. As1.2.2 Subgroup A2 Capacitance 4.2.4.3 Inspection level II, AQL0.65% As Table 3 code A Subgroup A3 Tangent of loss angle Insulati
21、on resistance 1.2.4.4 4.2.4.7 Inspection level I, AQL1.5% Test point A only As Table 3 code B As Table 3 code C Subgroup A5 CTR information 4.1.11 Attributes information for subgroups A1, A2 and A3 GROUP B Subgroup B1 Dimensions 1.2.3.1 To be applied on a sampling basis, lot-by-lot Subgroups B3 to B
22、6 are not applicable Inspection level S-4, AQL4.0% As in1.2.3.1 Subgroup B2 (D) 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 a
23、ngle Insulation 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 Inspection level S-3, AQL4.0% (See7.4 above) Tensile only BS20112.1Ta Method1 or3 As Table 3 code A As Table 3 code B As Table 3 code C 2s maximum for method3
24、sample to have sufficient termination length to carry out test. Method1 to be used for short leads. As Table 3 codes D and E As Table 3 code F As Table 3 code G As Table 3 code H Method to be decidedBS9074 N007:1978 4 BSI 01-2000 Inspection BS9070:Section 1 or BS9070:Section 4 reference and conditio
25、ns of test Performance requirements where not otherwise specified Subgroup B7 (D) Initial measurements Capacitance Tangent of loss angle Insulation resistance Endurance Final measurements Visual examination Capacitance change Tangent of loss angle Insulation resistance 4.2.4.3 1.2.4.4 4.2.4.7 4.2.7
26、1.2.2 4.2.4.3 1.2.4.4 4.2.4.7 Inspection level S-4, AQL1.5% To be applied only in the event of a failure in subgroup C5 48h duration As Table 3 code A As Table 3 code B As Table 3 code C As Table 3 codes D and E u 0.5%+0.5pF As Table 3 code G As Table 3 code H Subgroup B8 CTR information 4.1.11 Attr
27、ibutes information for subgroups B1, B2 and B7 GROUP C Subgroup C1 (D) Inductance 1.2.4.8 To be applied on a sampling basis at three-monthly intervals Subgroup C2 not applicable Inspection level S-3, AQL6.5% Applicable only where C500pF 50nHmax. Temperature coefficient Cyclic drift SeeAppendix C See
28、Appendix C SeeAppendix C SeeAppendix C Subgroup C3(a) (D) Initial measurements Capacitance Tangent of loss angle Insulation resistance Damp heat, steady state Final measurements Visual examination Capacitance Tangent of loss angle Insulation resistance 4.2.4.3 1.2.4.4 4.2.4.7 4.2.6.9 1.2.2 4.2.4.1 1
29、.2.4.4 4.2.4.7 Inspection level S-3, AQL6.5% 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 C3(b) (D) Flammability Inspection level S-4, AQL4% Minimum sample size13 SeeAppendix A Extinguish inu 15s after f
30、irst immersion. Extinguish inu 30s after second immersion. Subgroup C4 (D) Insulation resistance 4.2.4.7 Inspection level S-4, AQL4.0% Minimum sample size11 At70 C, test point A only (see1.2.1) 10G7BS9074 N007:1978 BSI 01-2000 5 Inspection BS9070:Section 1 or BS9070:Section 4 reference and condition
31、s of test Performance requirements where not otherwise specified Subgroup C5 (D) Initial measurements Capacitance Tangent of loss 4.2.4.3 1.2.4.4 Inspection level S-3, AQL4.0% As Table 3 code A As Table 3 code B Insulation resistance Endurance Damp heat, cyclic Final measurements Visual examination
32、Capacitance Tangent of loss angle Insulation resistance 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 1000h 1cycle 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 C6 CTR information 4.1.11 Attributes information for subgroups C1, C3
33、and C4. Measurements information for capacitance, tangent of loss angle, and insulation resistance for subgroup C5 GROUP D To be applied on a sampling basis at three-yearly intervals. Subgroup D4 not applicable Subgroup D1 (D) Initial measurements Capacitance Tangent of loss angle Insulation resista
34、nce Subgroup D1 (i) Robustness of terminations Visual examination Resistance to soldering heat Visual examination 4.2.4.3 1.2.4.4 4.2.4.7 1.2.6.1 1.2.2 4.2.6.2(2) 1.2.2 Inspection level S-3, AQL4.0% Minimum sample size13 Approximately50% of the specimens (minimum7) Length of terminationsW 10mm Metho
35、d1, solder bath,350 C Length of terminationW 10mm 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 Subgroup D1 (ii) Vibration Visual examination Bump 4.2.6.7 1.2.2 4.2.6.4 Remainder of the specimens (minimum6) Procedure B4,3h in one sense radially,3h in one s
36、ense axially. Component to be mounted in PWB configuration. At room temperature 1000 10bumps. The sample shall be equally divided between each of the three perpendicular planes. Component to be mounted in PWB configuration. As Table 3 code DBS9074 N007:1978 6 BSI 01-2000 Inspection BS9070:Section 1
37、or BS9070:Section 4 reference and conditions of test Performance requirements where not otherwise specified Subgroup D1 (ii) Visual examination Subgroup D1 (iii) Rapid change of temperature Climatic sequence Final measurements Visual examination Capacitance Tangent of loss angle Insulation resistanc
38、e 1.2.2 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) and (ii) combined As Table 3 code D 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) Initial measurements Capacitance Tangent of loss angle Insulation resistance Endurance Damp heat
39、, cyclic 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 4.2.6.8(6) 1.2.2 4.2.4.3 1.2.4.4 4.2.4.7 Inspection level S-3, AQL4.0% Duration2000h 2cycles As Table 3 code A As Table 3 code B As Table 3 code C As Table 3 codes D a
40、nd E As Table 3 code F As Table 3 code G As Table 3 code H Subgroup D3 (D) Initial measurements Visual examination Mould growth Final measurements Visual examination 1.2.2 4.2.6.12 1.2.2 Inspection level S-3, AQL4.0% 28 days exposure BS2011-2.1J Clause6.3.1 of BS2011-2.1J:1977 u scale2 Subgroup D5 (
41、D) Initial measurements Capacitance Tangent of loss angle Insulation resistance Storage at low temperature Final measurements Visual examination Capacitance Insulation resistance Voltage proof 4.2.4.3 1.2.4.4 4.2.4.7 4.2.6.11(2) 1.2.2 4.2.4.3 4.2.4.7 4.2.4.2 Inspection level S-3, AQL4.0% At lower ca
42、tegory temperature Test point A only 63 V, 1 min 5 s. As Table 3 code A As Table 3 code B As Table 3 code C As Table 3 code D As Table 3 code G As Table 3 code H No breakdown on flashoverBS9074 N007:1978 BSI 01-2000 7 Table 3 Performance requirements Inspection BS9070:Section1 or BS9070:Section 4 re
43、ference and conditions of test Performance requirements where not otherwise specified Subgroup D6 CTR information 4.1.11 Attributes information for subgroups D1, D2 and D5. Measurements information shall be given for capacitance, tangent of loss angle, and insulation resistance for subgroups D1 and
44、D2 Code Performance requirements A The capacitance shall be within the specified selection tolerance limits 0.03%1000pF at1kHz B The tangent of the loss angle shall not exceed: 0.1%u1000pF at1MHz C Test point A Not less than: 100G7 Test point C Not less than: 100G7 D There shall be no visible damage
45、 that is likely to reduce the usability of the product for its intended application E Marking shall be legible F Change shall not exceed: 0.5%+1pF G Value shall not exceed either1.2times the initial measured value or 0.03%1000pF at1kHz 0.1%u1000pF at1MHz whichever is the greater H Test point A Not l
46、ess than: 50G7 Test point C Not less than: 50G7BS9074 N007:1978 8 BSI 01-2000 Appendix A Flammability test Requirements and conditions for testing NOTEThe tests must be carried out in a substantially draught-free atmosphere. Method of test The flame is applied to the sample in a manner most likely t
47、o cause combustion, i.e.the capacitor is held in the flame at an angle of45 with the flame applied to the lower edge. The flame is applied for15s and then removed. Any self-sustained flame shall extinguish within15s after removal from the flame. The flame shall then be immediately re-applied for a f
48、urther15s. The time to extinguish shall be noted and it shall be less than, or equal to,30s. Appendix B Gauge Appendix C Temperature coefficient and cyclic drift The capacitor shall be maintained at each of the following temperatures in turn: Thermal shocks shall be avoided. Capacitance measurements
49、 shall be made as specified in1.2.4.3 of BS9070:Section 1:1969 at each of the temperatures specified above after the capacitor has reached thermal stability. The condition of thermal stability shall be judged to have been reached when two readings of capacitance taken at an interval of at least15min do not differ by an amount greater than that which can be attributed to the measuring apparatus, or such greater time that is known to be required for capacitance stability. Flame length 12 2mm Fuel Propane gas (without air) Jet No.1 hypodermic ne
