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1、BRITISH STANDARD BS 9070: Section 3:1970 Incorporating Amendment Nos. 1, 2, 3, 4, 5 and 6 Specification for Fixed capacitors of assessed quality: Generic data and methods of test Section 3: Tantalum electrolytic capacitors UDC 621.38.03:621.319.4 Licensed Copy: London South Bank University, London S
2、outh Bank University, Fri Dec 08 04:13:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9070: Section 3:1970 This British Standard, having been approved by the Telecommunication Industry Standards Committee, was published under the authority of the Executive Board on 22 January 1970 BSI 01-2000 The
3、following BSI references relate to the work on this standard: Committee references TLE/4 and TLE/4/4 Draft for comment 67/20315 ISBN 0 580 05685 6 Co-operating organizations The Telecommunication Industry Standards Committee, under whose supervision this British Standard was prepared, consists of re
4、presentatives from the following Government departments and scientific and industrial organizations: British Broadcasting Corporation* British Electrical and Allied Manufacturers Association British Radio Equipment Manufacturers Association* British Radio Valve Manufacturers Association British Rail
5、ways Board Cable and Wireless Ltd. Crown Agents for Oversea Governments and Administrations Department of Employment and Productivity (H.M. Factory Inspectorate) Electrical Contractors Association (Incorporated) Electrical Research Association* Electricity Council, the Generating Board and the Area
6、Boards, in England and Wales* Electronic Engineering Association* Electronic Valve and Semiconductor Manufacturers Association Institution of Electrical Engineers* Institution of Electronic and Radio Engineers* Institution of Production Engineers Ministry of Defence Ministry of Defence, Army Departm
7、ent Ministry of Defence, Navy Department* Ministry of Technology* Post Office* Radio and Electronic Component Manufacturers Federation* Relay Services Association of Great Britain Science Research Council Radio and Space Research Station* Scientific Instrument Manufacturers Association Society of Br
8、itish Aerospace Companies* Telecommunication Engineering and Manufacturing Association* The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the prepara
9、tion of this British Standard: Radio Society of Great Britain United Kingdom Atomic Energy Authority Amendments issued since publication Amd. No.Date of issueComments 641November 1970 1513July 1974 2094September 1976 2365October 1977 3574May 1981 3970May 1982Indicated by a sideline in the margin Lic
10、ensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:13:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9070: Section 3:1970 BSI 01-2000i Contents Page Co-operating organizationsInside front cover Forewordiii 3.1General matters1 3.1.1Scope1 3.1.2Related documents1 3
11、.1.3Terminology1 3.1.4Letter symbols, signs and abbreviations1 3.1.5Graphical symbols1 3.1.6Marking of the part or package1 3.1.7Eligibility for qualification approval1 3.1.8Structurally similar parts1 3.1.9Delayed delivery1 3.1.10Supplementary procedure for qualification approval1 3.1.11Certified t
12、est records1 3.1.12Standard ratings and characteristics1 3.1.13Unchecked parameters1 3.1.14Procedure to be followed in the event of failures at Group C inspection1 3.1.15Ordering information1 3.1.16Release before completion of Group B inspection1 3.2Test procedures1 3.2.1Measurement conditions1 3.2.
13、2Visual examination1 3.2.3Dimensioning and gauging procedure1 3.2.4Electrical test procedures1 3.2.4.1Preliminary drying1 3.2.4.2Voltage proof2 3.2.4.3Capacitance2 3.2.4.4Tangent of the loss angle2 3.2.4.5Leakage current2 3.2.4.6Impedance2 3.2.4.7Insulation resistance2 3.2.4.8Inductance2 3.2.4.9Oute
14、r foil termination2 3.2.4.10Temperature coefficient and cyclic drift2 3.2.4.11Temperature characteristic of capacitance2 3.2.4.12Short term stability2 3.2.4.13Charge/discharge test2 3.2.4.14D.C. surge voltage test2 3.2.4.15Pressure relief test3 3.2.5Mechanical tests3 3.2.6Environmental test procedur
15、es3 3.2.6.1Robustness of terminations3 3.2.6.2Soldering3 3.2.6.3Rapid change of temperature3 3.2.6.4Bumping3 3.2.6.5Shock3 3.2.6.6Acceleration3 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:13:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9070: Section 3
16、:1970 ii BSI 01-2000 Page 3.2.6.7Vibration3 3.2.6.8Climatic sequence3 3.2.6.9Damp heat, steady state3 3.2.6.10Container sealing3 3.2.6.11Storage3 3.2.6.12Mould growth4 3.2.6.13Salt mist4 3.2.7Endurance test procedure4 3.3Inspection schedule4 Table 1 Initial and final measurements7 Licensed Copy: Lon
17、don South Bank University, London South Bank University, Fri Dec 08 04:13:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9070: Section 3:1970 BSI 01-2000iii Foreword This section specifies the specific tests and requirements of Section 1 and 2 which are applicable to tantalum electrolytic capacito
18、rs. It prescribes the test schedule, giving the specific conditions of test as required by Sections 1 and 2. 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
19、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 to iv, pages 1 to 7 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be
20、indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:13:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:13:3
21、8 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9070: Section 3:1970 BSI 01-20001 3.1 General matters 3.1.1 Scope. This section applies to the tantalum electrolytic capacitors listed below, for use in equipment for telecommunication and in electronic devices employing similar techniques: 1) Plain fo
22、il, liquid electrolyte. 2) Etched foil, liquid electrolyte. 3) Sintered anode, liquid electrolyte. 4) Sintered anode, solid electrolyte. 3.1.2 Related documents. See 1.1.2. 3.1.3 Terminology. See 1.1.3. 3.1.4 Letter symbols, signs and abbreviations. See 1.1.4. 3.1.5 Graphical symbols. See 1.1.5. 3.1
23、.6 Marking of the part and package. See 1.1.6. 3.1.7 Eligibility for qualification approval. See 1.1.7. 3.1.8 Structurally similar parts. See 1.1.8. 3.1.9 Delayed delivery. See 1.1.9. 3.1.10 Supplementary procedure for qualification approval. See 1.1.10. 3.1.11 Certified test records 1) Certified te
24、st records shall be prepared in accordance with 1.1.11. 2) Attributes information shall be given for the following Sub-groups: A1, A2, A3, A4, B1, B2, C1, C3, C4, C5, D1, D2, D3, D4 and D6. 3) Measurements information shall be given for capacitance, tangent of the loss angle and leakage current afte
25、r Sub-groups C5, D1 and D2. The information shall be presented in group frequency tables showing: a) the change resulting from the test in the case of capacitance, b) the distribution prior to the test and after the test in the case of tangent of the loss angle and leakage current. 3.1.12 Standard r
26、atings and characteristics. In addition to the standard ratings and characteristics covered by 1.1.12 the detail specification should give information of special characteristics, for example: 1) L.F. impedance (foil types). 2) H.F. impedance (solid types). 3) Surge voltage. 4) Reverse voltage. 5) Ri
27、pple ratings. 6) Derating factor. 3.1.13 Unchecked parameters. See 1.1.13. 3.1.14 Procedure to be followed in the event of failures at Group C inspection. See 1.1.14. 3.1.15 Ordering information. See 1.1.15 and 2.4. 3.1.16 Release before completion of Group B inspection. See 1.1.16. 3.2 Test procedu
28、res 3.2.1 Measurement conditions. See 1.2.1. 3.2.2 Visual examination. See 1.2.2. 3.2.3 Dimensioning and gauging procedure. See 1.2.3. 3.2.4 Electrical test procedures 3.2.4.1 Preliminary drying. Not applicable. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04
29、:13:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9070: Section 3:1970 2 BSI 01-2000 3.2.4.2 Voltage proof. See 1.2.4.2. 1) Test voltage: 1 000 V. Test point C. 2) Method of applying test voltage: Method (1) of 1.2.4.2.1. 3) Duration of the test: 1 min 5 s. 3.2.4.3 Capacitance. See 1.2.4.3. 1) Fr
30、equency of measurement: 100 Hz or 120 Hz (where a frequency is used other than that for which limits are given, the limits shall be corrected accordingly). 2) Applied voltage: 0.1 V to 1.0 V peak a.c. 3) D.C. polarizing voltage: 2.1 V to 2.5 V except for bi-polar capacitors, which shall be measured
31、without a polarizing voltage unless otherwise prescribed in the detail specification. 3.2.4.4 Tangent of the loss angle. See 1.2.4.4. For conditions of measurement see 3.2.4.3. 3.2.4.5 Leakage current. See 1.2.4.5. A 1 000 7 minimum protective resistor shall be placed in series with the capacitor to
32、 limit the charging current. 3.2.4.6 Impedance. See 1.2.4.6. Applicable to the following types with a capacitance value W 0.68 4F (a) porous anode solid electrolyte types (Sub-group A4), (b) liquid electrolyte porous anode types (Sub-group C4). 1) Voltage. If the peak a.c. voltage exceeds 0.5 V on p
33、olar types a direct polarizing voltage of 2.5 V max. shall be applied. The application of voltage shall be such as not to cause any readable change in impedance due to the change in temperature of the capacitor. 2) Frequency a) 100 kHz in Sub-group A4. b) 100 kHz in Sub-group C4. 3) Temperature a) S
34、tandard conditions of measurement in Sub-group A4. b) 20 5 C and at lower category temperature in Sub-group C4. 4) Method of test and accuracy a) Figure E.2 of Appendix E for Sub-group A4. b) Current and voltage for Sub-group C4. Accuracy: 5 % or 0.1 7 whichever is the greater. 5) Polarizing voltage
35、. See 1) above. 3.2.4.7 Insulation resistance. See 1.2.4.7. 1) Measuring voltage and test point: 100 15 V; Test point C. 2) Method of applying test voltage: Method (1) of 1.2.4.2.1. 3.2.4.8 Inductance. Not applicable. 3.2.4.9 Outer foil termination. Not applicable. 3.2.4.10 Temperature coefficient a
36、nd cyclic drift. Not applicable. 3.2.4.11 Temperature characteristic of capacitance. Not applicable. 3.2.4.12 Short term stability. Not applicable. 3.2.4.13 Charge/discharge test. Not applicable. 3.2.4.14 D.C. surge voltage test. See 1.2.4.14. Where the upper category temperature is less than or equ
37、al to 85 C all samples shall be tested at the upper category temperature. Where the upper category temperature is greater than 85 C half of the specimens shall be tested at 85 C and the other half at upper category temperature. 1) Maximum permissible time constant: 1 s. 2) Ratio of applied voltage t
38、o rated voltage or category voltage (as appropriate): 1.15 : 1. 3) Number of cycles of test: 1 000 cycles; for bi-polar capacitors the polarity shall be reversed after 500 cycles. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:13:38 GMT+00:00 2006, Uncontrol
39、led Copy, (c) BSI BS 9070: Section 3:1970 BSI 01-20003 4) Duration of surge: 30 s. 5) Time between surges: 5.5 min. The test shall be terminated on the discharge portion of the cycle. 3.2.4.15 Pressure relief test. Not applicable. 3.2.5 Mechanical tests. Not applicable, see 1.2.5. 3.2.6 Environmenta
40、l test procedures 3.2.6.1 Robustness of terminations. See 1.2.6.1. 3.2.6.2 Soldering. See 1.2.6.2. 1) Solderability. Method 3, Solder globule. Period of recovery, not less than 1 h and not more than 2 h. The terminations shall not be degreased. Non-activated flux shall be used. The test shall be app
41、lied at any point on the terminations. 2) Resistance to soldering heat. Method 1, Solder bath 350 C. Period of recovery: not less than 1 h and not more than 2 h. 3.2.6.3 Rapid change of temperature. See 1.2.6.3. 1) Duration of exposure to high and low temperatures: 30 min. 2) Period of recovery: Not
42、 less than 1 h and not more than 2 h. For hermetically sealed components the test in Sub-group B2 shall be 5 cycles. 3.2.6.4 Bumping. See 1.2.6.4. The capacitors shall be mounted by clamping the body and the terminations. 3.2.6.5 Shock. Not applicable. 3.2.6.6 Acceleration. Under consideration. 3.2.
43、6.7 Vibration. See 1.2.6.7. The capacitors shall be mounted by clamping the body and the terminations. During the last half hour of vibration in each direction an electrical measurement shall be made to determine intermittent faults. Detection equipment shall be sufficiently sensitive to detect any
44、interruptions with a duration of 0.5 ms or greater. 3.2.6.8 Climatic sequence. See 1.2.6.8. 1) Initial measurements. See Table 1 for Sub-groups B2 and D1 as appropriate. 2) Dry heat duration: 16 h. 3) Damp heat accelerated: First cycle (omitted for /O4 and /A4). 4) Cold duration: 2 h. 5) Low air pre
45、ssure (Sub-group D1 only): Duration of test: 5 min. Temperature: 15 to 35 C. Applied voltage: UR for 1 min. 6) Damp heat accelerated: Remaining cycles as 1.2.6.8 6) for Sub-group D1. One cycle only in Sub-group B2 for /A4, /21 and /56. 7) Final measurements. See Table 1 for Sub-groups B2 and D1 as a
46、ppropriate. 3.2.6.9 Damp heat, steady state. See 1.2.6.9. 1) Initial measurements. As for Sub-group C3 in Table 1. 2) No voltage shall be applied during the test unless otherwise prescribed in the detail specification. 3) Final measurements. See Table 1 for Sub-group C3. 3.2.6.10 Container sealing.
47、See 1.2.6.10. For hermetically sealed components only. 1) Test method. Method 1 of Test Qc of BS 2011. 2) Final measurements. See Table 1 for Sub-group B2. 3.2.6.11 Storage. Not applicable. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:13:38 GMT+00:00 2006,
48、 Uncontrolled Copy, (c) BSI BS 9070: Section 3:1970 4 BSI 01-2000 3.2.6.12 Mould growth (if required in the detail specification). See 1.2.6.12. 1) Initial measurements. See Table 1 for Sub-group D3. 2) Duration: 28 days. 3) Final measurements after recovery. See Table 1 for Sub-group D3. 3.2.6.13 S
49、alt mist. See 1.2.6.13. Metal cased types only. 1) Initial measurements after recovery. See Table 1 for Sub-group D4. 2) Severity 1. 3) Final measurements after recovery. See Table 1 for Sub-group D4. 3.2.7 Endurance test procedure. See 1.2.7. Half the specimens shall be subjected to rated voltage (UR) at 85 C. The other half of the specimens shall be subjected to category voltage (UC) at the upper category temperature. During the test for bi-polarized capacitors the applied voltage shall be reversed in polarity at intervals of 120