1、- STD-BSI BS 7070: SEC 3-ENGL 1970 Lb2qbb9 b08725 q7T BRITISH STANDARD 9070 : Section 3 : 1970 METRIC UNITS UDC 621.38.03:621.319.4 SPECIFICATION FOR FIXED CAPACITORS OF ASSESSED QUALITY: GENERIC DATA AND METHODS OF TEST Section 3. Tantalum electrolytic capacitors STD-BSI BS 9070: SEC 3-ENGL 1970 m-
2、lbZLibb9 Ob0872b 32b BS 9070 : Section 3 : 1970 SPECIFICATION FOR FIXED CAPACITORS OF ASSESSED QUALITY: GENERIC DATA AND METHODS OF TEST Section 3. Tantalum electrolytic capacitors BS 9070 : Section 3 : 1970 THIS BRITISH STANDARD, having been approved by the Telecommunication Industry Standards Comm
3、ittee, was published under the authority of the Executive Board on 22nd January, 1970. SBN: 580 05685 6 The Institution desires to call attention to the fact that this British Standard does not purport to include all the necessary provisions of a contract. In order to keep abreast of progress in the
4、 industries concerned, British Standards are subject to periodical review. Suggestions for improvements will be recorded and in due course brought to the notice of the committees charged with the revision of the standards to which they refer. A complete list of British Standards, numbering over 5000
5、, fully indexed and with a note of the contents of each, will be found in the British Standards Yearbook, price 20s. The BS Yearbook may be consulted in many public libraries and similar institutions. This standard makes reference to the British Standards quoted in 1.1.2. Britsh Standards are revise
6、d, when necessary, by the issue either of amendment slips or of revised editions. It is important that users of British Standards should ascertain that they are in possession of the latest amendments or editions. CO-OPERATING ORGANIZATIONS The Telecommunication Industry Standards Committee, under wh
7、ose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientSc and industrial organizations : *British Broadcasting Corporation British Electrical and Allied Manufacturers Association Association Association *British Radio Equip
8、ment Manufacturers British Radio Valve Manufacturers British Railways Board Cable and Wireless Ltd. Crown Agents for Oversea Governments and Administrations Department of Employment and Productivity (H.M. Factory Inspectorate) (Incorporated) Electrical Contractors Association *Electrical Research As
9、sociation *Electricity Council, the Generating Board and the Area Boards, in England and Wales *Electronic Engineering Association Electronic Valve and Semiconductor Manufacturers Association *Institution of Electrical Engineers *Institution of Electronic and Radio Institution of Production Engineer
10、s Ministry of Defence Ministry of Defence, Army Department *Ministry of Defence, Navy Department *Ministry of Technology *Post Office *Radio and Electronic Component Manufacturers Federation Britain Space Research Station Association Engineers Relay Services Association of Great *Science Research Co
11、uncil-Radio and Scientific Instrument Manufacturers *Society of British 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
12、 directly represented on the committee entrusted with the preparation of this British Standard: Radio Society of Great Britain United Kingdom Atomic Energy Authority The following BSI references relate to the work on this standard : Committee references TLE/4 and TLE/4/4 Draft for comment 67/20315 2
13、 STD-BSI BS 9070: SEC 3-ENGL 1970 W Lb2LibbS Ob08728 119 W BS 9070 : Section 3 : 1970 CONTENTS Page Page .5 .5 .5 Co-operating organizations . . 2 3.2.4.2 Voltage proof . Foreword , . 4 3.2.4.3 Capacitance. . 3.2.4.4 Tangent of the loss angle . SPECIFICATION - 3.2.4.5 Leakage current . .5 3.2.4.6 Im
14、pedance . .5 SECTION 3. TANTALUM ELECTROLYTIC 3.2.4.7 Insulation resistance . .6 3.1 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 3.1.10 3.1.11 3.1.12 3.1.13 3.1.14 3.1.15 3.1.16 3.2 3.2.1 3.2.2 3.2.3 3.2.4 3.2.4.1 CAPACITORS General matters . Scope . Related documents . Terminology . Lette
15、r symbols, signs and abbrevia- tions . Graphical symbols . Marking of the part or package . Eligibility for qualification approval Structurally similar parts . Delayed delivery . Supplementary procedure for quaii- fication approval . Certified test records . Standard ratings and characteristics Unch
16、ecked parameters . Procedure to be followed in the event of failures at Group C inspection . Ordering information . Release before completion of Group B inspection . Test procedures . Measurement conditions e Visual examination . Dimensioning and gauging pro- cedure. Electrical test procedures Preli
17、minary drying . 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 3.2.4.8 3.2.4.9 3.2.4.10 3.2.4.1 1 3.2.4.12 3.2.4.1 3 3.2.4.14 3.2.4.15 3.2.5 3.2.6 3.2.6.1 3.2.6.2 3.2.6.3 3.2.6.4 3.2.6.5 3.2.6.6 3.2.6.7 3.2.6.8 3.2.6.9 3.2.6.10 3.2.6.1 1 3.2.6.12 3.2.6.13 3.2.7 3.3 Inductance . Outer foil termination
18、 . Temperature coefficient and cyclic drift . Temperature characteristic of capa- citance . Short term stability . ChargeJdischarge test . D.C. surge voltage test . Pressure relief test . Mechanical tests . Environmental test procedures . Robustnesi of terminations . Soldering . Rapid change of temp
19、erature . Bumping . Shock Acceleration . Vibration . Climatic sequence. . Damp heat, steady state . Container sealing . Storage . Mould growth . Salt mist . Endurance test procedure . Inspection schedule e 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 7 1 7 7 7 7 7 TABLE 1. Initial and final measurements 8-10
20、 3 STD-BSI BS 7070: SEC j-ENGL 1770 Lb24bb7 Ob08727 035 W BS 9070 : Section 3 : 1970 BRITISH STANDARD SPECIFICATION FOR FIXED CAPACITORS OF ASSESSED QUALITY: GENERIC Section DATA AND METHODS OF TEST 3. Tantalum electrolytic capacitors FOREWORD This section specifies the specific tests and requiremen
21、ts of Section 1 and 2 which are applicable to tantalum electrolytic capacitors. It prescribes the test schedule, giving the specific conditions of test as required by Sections I and 2. SPECIFICATION 3.1 GENERAL MATTERS 3.1.1 Scope. This section applies to the tantaluin electrolytic capacitors listed
22、 below, for use in equipment for telecommunication and in electronic devices employing similar techniques : (1) Plain foil, 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.
23、3 Terminology. See 1.1.3. 3.1.4 Letter symbols, signs and abbreviations. See 1. i .4. A 3.1.5 Graphical symbols. See 1.1.5. 3.1.6 Marking of the part and package. See 1.1.6. 3.1.7 Eligibiliy for qualification approval. See 1.1.7. 3.1.8 Structurally similar parts. See 1.1.8. 3.1.9 Delayed delivery. S
24、ee 1.1.9. 3.1.10 Supplementary procedure for qualification approval. See 1 .l. 10. 3.1.11 Certified test records. (1) Certified test records shall be prepared in accordance with 1.1.1 1. (2) Attributes information shall be given for the following Sub-groups: Ai, A2, A3, A4, Bl,B2, C1, C3, C4, C5, D1
25、, D2, D3, D4 and D6. (3) Measurements information shall be given for capacitance, tangent of the loss angle and leakage current after Sub-groups C5, D1 and D2. The information shall be presented in group frequency tables showing: u. the change resulting from the test in the case of capacitance, b. t
26、he 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 ratings and Characteristics. In addition to the standard ratings and characteristics covered by 1.1.12 the detail specification should give information of special charac
27、teristics, for example: (i) L.F. impedance (foil types). (2) H.F. impedance (solid types). 4 STD-BSI BS q70: SEC 3-ENGL L770 = IbZqbb7 b08730 857 = BS 9070 : Section 3 : i970 (3) Surge voltage. (4) Reverse voltage. (5) Ripple ratings. (6) Derating factor. 3.1.13 Unchecked parameters. See 1.1 .I 3. 3
28、.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 I. I. I 6. 3.2 TEST PROCEDURES 3.2.1 Measurement conditions. See 1.2.1. 3.2.2 Visual examination. Se
29、e 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. 3.2.4.2 Voltage proof. See 1.2.4.2. (I) Test voltage: loo0 V. Test point C. (2) Method of applying test voltage: Method (I) of 1.2.4.2.1. (3) Duration of the te
30、st: 1 min i 5 s. 3.2.4.3 Capacitance. See 1.2.4.3. (I) Frequency of measurement: 100 Hz or 120 Hz.unless otherwise described in the detail specification . (2) Applied voltage: 0.1 V to 1-0 V peak a.c (3) D.C. polarizing voltage: 2.1 V to 2.5V except for bi-polar capacitors, which shall be measured A
31、 (where a frequency is used other than that for which limits are aven, the limits shall be corrected accordingly) /7 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.
32、5 Leakage current. See 1.2.4.5. A 1W the capacitor to liinit the charg.ng current. minimum protective resistor shall be placed in series with A 3.2.4.6 Impedance. See 1.2.4.6. Applicable to the following types with a capacitance value 2 0.68 (u) porous anode solid electrolyte types (Sub-group A4), (
33、b) liquid electrolyte porous anode types (Sub-group C4). (I) Voltage. If the peak a.c. voltage exceeds 0.5 V on polar 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 tempe
34、rature of the capacitor. (2) Frequency a. 100 kHz in Sub-group A4. b. 100 kHz in Sub-group C4. a. Standard conditions of measurement in Sub-group A4. b. 20 i 5 “C and at lower category temperature in Sub-group C4. a. Fig. E.2 of Appendix E for Sub-group A4. b. Current and voltage for Sub-group C4. A
35、ccuracy: i 5 % or 0.1 Q whichever is the greater. (3) Temperature (4) Method of test and accuracy (5) Polarizing voltage. See (I) above. A 5 BS 9070 : Section 3 : 1970 A A A A A A 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 o
36、f applying test voltage: Method (i) 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 coeficient and cyclic drijt. Not applicable. 3.2.4.11 Temperature characteristic of capacitance. Not applicable. 3.2.4.12 Short term stability. N
37、ot applicable. 3.2.4.13 Chargejdischarge tesf. Not applicable. 3.2.4.14 D.C. surge voltage rest. See 1.2.4.14. Where the upper category temperature is less than or equal to 85 “C all samples shall be tested at the upper category temperature. Where the upper category temperature is greater than 85 “C
38、 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 to rated voltage or category voltage (as appropriate) : 1.15 : 1. (3) Number of cycles of test: loo0 cycles; for bi-polar capacit
39、ors the polarity shall be reversed after 500 cycles. (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 sM1 not degreased. Non-activated flux shall be used. The test shall be applied
41、 at any (2) . point on the terminations. (2) Resistance lo soldering heat. Method 1, Solder bath 35(YC. Period of recovery: not less than 1 h and not more than 2 h. (1) Duration of exposure to high and low temperatures: 30 min. (2) Period of recovery: Not less than 1 h and not more than 2 h. 3.2.6.3
42、 Rapid change oj temperature. See 1.2.6.3. For hermetically sealed components the test in Sub-group B2 shall be 5 cycles. 3.2.6.4 Bumping. See 1.2.6.4. nie 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.
43、 3.2.6.7 Vibration. See 1.2.6.7.The capacitors shall be mounted by clamping the body and the teminations,Wl1en specified in the detail . . - specification, . - . - - - . during-the last 30 mb-of the vibration test in .- _ eac,direction-of.movement. - an electrical measureinent shall be made to check
44、 for intermittent contacts or open or short circwts. i The method of measuremenr shall be prescribed in the detail specificatiol, 3.2.6.8 Climatic sequence. See 1.2.6.8. (1) Initiai measurements. See Table 1 for Sub-groups B2 and DI as appropriate. (2) Dry heat duration: 16 h. (3) Damp heat accelera
45、ted: First cycle (omitted for -/-/O4 and -1-IA4). (4) Cold duration: 2 h. ,c,r .,i,)(, C,I,.T,L“, - . . - - 6 STD - BSI BS 9070: SEC 3-ENGL 1970 Lb24bbS Ob08732 b2T BS 9070 : Section 3 : 1970 (5) Low air pressure (Sub-group D1 only): Duration of test: 5 min. Temperature: 15 O to 35 OC. Applied volta
46、ge: U, for 1 min. (6) Damp heat accelerated: Remaining cycles as 1.2.6.8(6) for Sub-group D1. One cycle only in Sub- (7) Final measurements. See Table 1 for Sub-groups B2 and D1 as appropriate. group B2 for -/-IA4, -1-121 and -1-156. 3.2.6.9 Damp heat, steady state. See 1.2.6.9. (1) Initial measurem
47、ents. 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. See 1.2.6.10. For hermetically sealed components only. (1) Test method. Met
48、hod 1 of Test Qc of BS 2011. (2) Final measurements. See Table 1 for Sub-group B2. 3.2.6.11 Storage. Not applicable. 3.2.6.12 Mould growth. See 1.2.6.12. (if required in the detail specification) (1) Initial measurements. See Table 1 for Sub-group D3. (2) Duration: 28 days. (3) Final measurements af
49、ter recovery. See Table 1 for Sub-group D3. i 3.2.6.13 Salt mist. See 1.2.6.13. Metal cased types only. (1) Initial measurements. See Table 1 for Sub-group D4. (2) Severity 1. (3) Final measurements kfter 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 (U,) at 85 OC. 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 a
