1、- - -1 EIA 377 70 323i.1600 00bb859 T m 5- ANSI C8 3.6 2-1 97 1 Approved July 14, 1971 AM ER ICAN NATION A 1 STAND AR D S INSTITUTE ElA STANDARD h h 9 VI Metallised Dielectric Capacitors ? ? in Metallic and Non-Metallic Cases for Direct C u r ren t App 1 ca t ion 9 Y RS1377 1 July 1970 Engineering D
2、epartment ELECTRONIC INDUSTRIES ASSOCIATION P EIA 377 70 m 3234600 OObbbO b m . * NOTICE EIA engineering standards are designed to serve the public interest through eliminating mis- understandings between manufacturers and purchasers, facilitating interchangeability and improve- ment of products, an
3、d assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such standards shall not in any respect pre- clude any member or non-member of EIA from manufacturing or selling products not conforming to such standards, nor shall the e
4、xistence of such standards preclude their voluntary use by those other than EIA members whether the standard is to be used either domestically or internationally. Recommended standards are adopted by EIA without regard to whether or not their adoption may involve patents on articles, materials, or p
5、rocesses. By such action, EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the recommended standards. Published by ELECTRONIC INDUSTRI ES ASSOCIATION Engineering Department 2001 Eye Street, N.W., Washington, D. C. 20006 Electronics
6、 Industries Association 1970 All rights reserved PRICE: $4.20 Printed in U.S.A. O _- EIA 377 70 W 3234b00 OObb8bL 8 W * :- , METALLIZED DIELECTRIC CAPACITORS IN METALLIC AND NON-METALLIC CASES FOR DIRECT CURRENT APPLICATION (From Standards Proposal No. 1045, formulated under the cognizance of EIA Wo
7、rking Group P-2.2 on Film, Paper and Plastic Dielectric Capacitors.) 1. SCOPE 1.1 This standard covers the general requirements for direct current (D.C.) metalized electrode, fim and/or paper dielectric fixed capacitors in metallic and non-metallic cases. Capacitors listed in this standard are used
8、primarily for filtering, bypass, coupling and blocking purposes where D.C. voltages predominate. They are characterized by small size (compared to metal foil electrode capacitors) and by the ability to “clear”, or resume functioning, within specification limits, following momentary breakdowns. Appli
9、cations using capacitors described in this standard should be those where high values of insulation resistance are not essential and where momentary breakdowns can be tolerated. A.C. application info-m+tion is given in paragraph 5.0. 1.2 Portions of EIA Standards RS-186 and RS-178, when specified fo
10、rm a part of this standard. a 2. STANDARD DESIGNATION AND STYLES 2.1 The EIA Standard designation shall consist of eight constituent parts as illustrated below. K. - 104 - B - L - 1 - A - 26 - 377c Class Style Terminal Circuit Characteristic Voltage Capacitance Tolerance 2.1.1 2.1.2 2.1.3 2.1.4 2.1.
11、5 2.1.6 2.1.7 2.1.8 2.1.1 Class Designation 2.1.1.1 Class designation signifies the component is a capacitor made to the requirements of EIA Standard RS-377. 2.1.2 Style Designation 2.1.2.1 Style designation distinguishes the configuration and construction features. A detailed parts specification wi
12、th pertinent data on each listed style is contained in the appendices of this Standard. 2.1.2.1.1 Style 08 is a hermetically sealed, metal cased tubular capacitor with axial leads and uninsulated case. RS-377 Page 1 ,- y. EIA 377 70 W 3234600 0066862 T W RS-377 Page 2 2.1.2.1.2 Style 09 is a hermeti
13、cally sealed, metal cased tubular capacitor with axial leads and insulated case. 2.1.2.1.3 Style 24 is a round, plastic film wrapped capacitor with plastic end seals and radial leads. 2.1.2.1.4 Style 25 is a round, plastic film wrapped capacitor with plastic end seals and axial leads. 2.1.2.1.5 Styl
14、e 26 is a flat oval, plastic film wrapped capacitor with plastic end seals and axial leads. 2.1.2.1.6 Style 27 is a flat oval, plastic film wrapped capacitor with plastic end seals and radial leads. 2.1.2.1.7 Style 30 iS a round, plastic tube cased capacitor with plastic end seals and axial leads. 2
15、.1.2.1.8 Style 3 1 is a pre-molded, plastic cased, rectangular capacitor with plastic end seals and axial leads. 2.1.2.1.9 Style 32 is a pre-molded, plastic cased, rectangular capacitor with plastic end seals and radial leads. 2.1.2.1.1 O Style 40 is a plastic pre-molded or fully molded, round capac
16、itor with axial leads. 2.1.2.1.1 1 Style 42 is a plastic molded, flat oval capacitor with radial leads and standoff feet. 2.1.2.1.12 Style 50 is a dip coated or plastic cased, round capacitor with radial leads. 2.1.2.1.13 Style 52 is a dip coated or plastic cased, flat oval capacitor with radial lea
17、ds. 2.1.2.1.14 Style 53 is a hermetically sealed, metallic cased rectangular bathtub capacitor with mounting feet and side terminals. 2.1.2.1.15 Style 72 is a hermetically sealed, drawn metallic cased, rectangu- lar capacitor with solder lug or pillar terminals. 2.1.3 Terminai Style 2.1.3.1 Terminal
18、 Style shall be designated as follows: A. - Axial wire lead. EIA 377 70 M 323qbOO 00bbb3 L M B. - Non-removable solder lug. E. - Pillar insulator with threaded stud. L. - Pillar insulator with non-removable solder lug. R. - Radial wire lead. 2.1.4 Schematic Circuit 2.1.4.1 The schematic diagram shal
19、l be designated by a number as follows: Circuit 1 - Both terminals insulated from case Circuit 3 - One terminal connected to case. (Metal cases only) - - - 2.1.5 Characteristic 2.1.5.1 The characteristic letter designates the pertinent electrical parameters and operating temperature range as shown i
20、n Table I. 2.1.6 Voltage Rating 2.1.6.1 The voltage rating is designated by the following descriptive letter. Voltage Letter Rating A Y B V C E F 50 75 1 O0 150 200 400 600 2. I .7 Capacitance Value 2.1.7.1 The nominal capacitance value is described by three digits; the fiist and second digits are t
21、he first and second significant figures of the nominal capacitance expressed in picofarads (pF.). The third digit states the number of zeros following the two significant figures. Example: 5 6 2 5 6 O OpF.or.0056uF. RS-377 Page 3 EIA 377 70 M 3234b00 00bb8b4 3 M I +2% +lo% +lo% +lo% -1.0% +6% -1% RS
22、-377 Page 4 Charac- teristic Letter B K L N Q S R *NOTE: B K L N Q S R Maximum Operating Temp. 125C 125C 125OC 125C 85C 85C 1 7OoC TABLE I CHARACTERISTIC* Maximum Dissipation Factor At 25C 0.6% 1.5% 1 .O% 1.25% o. 1% 2.5% 0.25% At Hi-Temp. 0.6% 2.0% 2.5% 2.0% o. 2% 2.5% 0.5% Maximum Capacitance Chan
23、ge At-55C 1 At85C I3% -10% -10% -10% +1.5% -12% +2% Insulation resistance variation with temperature is shown in detailed parts specifications in appendices of this standard. defines Metallized Polycarbonate or equal. defines Metallized Paper or equal. defines Metallized Polyethylene Terephthalate o
24、r equal. defines Metallized Paper and Polyester Film Combination or equal. defines Metallized Polystyrene or equal. defines Metallized Cellulose Acetate or equal. defines Metallized Polyfluoroethylene or equal. At Hi-Temp. +2% +15% +2wo +15% -3% EIA 377 70 m 3234600 0066865 5 m RS-377 page5 2.1.8 Ca
25、pacity Tolerance 2.1.8.1 The permissible tolerance from nominal capacitance value is expressed by a letter designation as follows: Designation Tolerance (9% of nominal) F f I%* *Capacitance measurements as G f 2%* specified in 3.6.1 shall be J f 5% made at or correlated to K 110% 25C f 2OC at a rela
26、tive M f20% humidity of 35% maximum. 3. STANDARD TESTS 3.1 Standard Test Conditions 3.1.1 or referred to, are as follows: Unless otherwise Specified, the atmospheric conditions at which tests are to be made, Temperature . 25OC plus 10C minus 5C Barometric pressure 28” to 32” Hg. Relative humidity Le
27、ss than 80% 3.2 Testing Program 3.2.1 Recommended order of tests shall be in the sequence listed in Table II. 3.2.2 agreement between the user and the supplier. The types of tests, number of samples and allowable failures shall be determined by 3.2.3 No sample shall be subjected to both Group 2 and
28、Group 3 tests. 3.3 Mechanical Inspection 3.3.1 Dimensions must be within the tolerance allowed. 3.3.2 Marking shall be legible, complete and correct. 3.4 Mechanical Tests O - 3.4.1 Pull Test EIA 377 70 m 3234600 OObbAbb 7 m RS-377 Page 6 TABLE II GROUP 1 (Ali Samples) Mechanical Inspection Marking D
29、ielectric Test Capacitance Dissipation Factor Insulation Resistance Leak Test (Metal Cased Styles Only) GROUP 2 (50% of Samples) Mechanical Tests (except bending and vibration tests) Capacitance change at low temperature Capacitance change at high temperature Insulation resistance at high temperatur
30、e Life GROUP 3 (50% of Samples for non-metal cased styles and 25% for metal cased styles) Bending Test Humidity Test GROUP 4 Vibration Paragraph 3-3 4. 3.5 3.6 3.7 3.8 3.13 3.4 3.10 3.9 3.8.4 3.1 1 3.4.2.1 3.12 (25% of Samples, Metal Cased Styles) 3.4.5 EIA 377 70 W 3234b00 0066867 9 W RS-377 Page 7
31、 3.4.1.1 Capacitors shall withstand a steady pull as specified in the detail parts specification applied to the terminal in the direction of terminal egress, for 10 seconds, per RS-186, Method 6, Type 1. Terminals shall not fracture or break, nor shall there be any damage to the capacitor or seal. 3
32、.4.2 Bending Test 3.4.2.1 Capacitors shall have the load specified in the detail parts specifications freely suspended from each of its leads in turn, for two (2) bends per RS-186, Method 6, Type III test. Two bends in opposite direction shall be applied. The leads shall not fracture or break, nor s
33、hall there be any damage to the capacitor or seal. 3.4.3 Ductility Test 3.4.3.1 Five complete turns of each lead shall be wound around a cylinder having a diameter equal to the nominal diameter of the lead wire. The leads and lead coating shall not fracture or break. 3.4.4 Solderability Test 3.4.4.1
34、 Lead wires shall be subjected to solderability tests of EIA Standard RS-178, test condition 1. At the completion of the test, the lead wires shall show evidence of acceptable solderability. 3.4.5 Vibration Metal cased styles shall be subjected to vibration requirements of EIA Standard RS-186, Metho
35、d 7, Type I test. The capacitors shall be securely fastened by their normal mounting means. Wire-lead capacitors shall be secured 1/2” f 1/8” from the case. During the last 30 minutes of vibration in each direction, a signal of 1 KHz f 200 Hz at a level of 1 f 0.2 volts should be placed across the c
36、apacitor and measured with a suitable alternating-current recording device for the purpose of determining the presence of open circuits, short circuits, or intermittent contacts. 3.5 Dielectric Withstanding Voltage Test (See applicable portions of EL4 Standard RS-186, Method 4). 3.5.1 Terminal to Te
37、rminal Capacitors shall be tested for fifteen seconds by applying between terminals a potential of 200% of rated voltage. EIA 377 70 m 3234b00 OObbAb& O m RS-377 Page 8 3.5.1.1 Test voltages shall be applied through a current limiting resistor of not less than 20 ohms per volt and not more than 1000
38、 ohms per volt. 3.5.1.2 Capacitors shall be discharged through current limiting resistor described in paragraph 3.5.1.1. 3.5.1.3 Capacitors shall not become permanently short circuited or otherwise damaged as a result of application of dielectric test voltages of paragraphs 3.5.1 or 3.5.1.1. 3.5.2 T
39、erminal to Case (where case is not a terminal): 3.5.2.1 For metal cased styles in cylindrical cases 1/2” nominal diameter or less, apply 200% of rated DC voltage for one second. (Dimension does not include insulating sleeve.) For cases larger than 1/2”, apply 400% of the rated DC voltage for one sec
40、ond. 3.5.2.2 For non-metallic cased styles, the test shall be conducted by closely wrapping metal foil around the capacitor case to within 1 /8” of the lead wires or the end of the capacitor body and applying the voltage for the duration specified in 3.5.1. 3.5.3 Insulating Sleeve Test Styles having
41、 a metal case with insulating sleeve on the capacitor body shall have a potential of 2000 VDC applied for one second between the capacitor case and a closely wrapped metal foil around the capacitor sleeve. The metal foil shall be of such dimension as to allow 7/64” to 9/64 insulating surface exposur
42、e on both ends. 3.6 Capacitance 3.6.1 Measurements of capacitance shall be made at or referred to 1000 Hz for ratings not in excess of 10.0 uf. For ratings above 10.0 uf, measurement shall be made at or referred to 60 Hz. 3.6.2 used for capacitance measurements. Equipment having an accuracy of at le
43、ast 10% of the capacitance tolerance shall be 3.6.3 Capacitance measured shall be within capacitance tolerance marking. 3.7 Dissipation Factor 3.7.1 Measurements of dissipation factor shall be made at or referred to 1000 Hz. for ratings not in excess of 10.0 uf. For ratings above 10.0 uf, measuremen
44、t shall be made at or referred to 60 Hz. 3.7.2 Measurement accuracy shall be f 2% of dial reading or .001, whichever is greater. EIA 377 70 W 3239600 00bbBbi 2 W RS-377 Page 9 3.7.3 to the applicable characteristic. Dissipation factor shall be less than the maximum limit listed in Table I correspond
45、ing 3.8 Insulation Resistance 3.8.1 volts whichever is less. Test in accordance with EIA Standard RS-186, Method 13, at rated voltage or 500 3.8.2 requirements shown in detailed parts specifications in appendix of this standard. Insulation resistance values measured between terminals of capacitors s
46、hall meet 3.8.3 Correction for insulation resistance measurements taken at temperatures other than at 25C is shown in Table III. Divide the measured value by the correction factor corresponding to temperature of measurement. TABLE III INSULATION RESISTANCE CORRECTION FACTORS I Degrees C Correction F
47、actor Degrees C Correction Factor 20 21 22 23 24 25 26 27 1.42 1.33 1.24 1.16 1 .O8 1 .o0 O. 94 0.87 28 29 30 31 32 33 34 35 0.82 0.76 0.7 1 0.67 0.63 0.59 0.55 0.5 1 3.8.4. Insulation Resistance at High Temperature Insulation resistance will be measured as specified in 3.8.1, 3.8.2 and 3.8.3 except
48、 with the capacitor stabilized at the high ambient temperature (I3OC) specified in Table I. EIA 377 70 m 3234600 0066870 9 m v RS-377 Page 10 I 3.9 3.10 3.1 1 3.12 3.8.5 Insulation Resistance Terminal to Case (metal cased styles only). When the case is not a terminal, the measurements shall be made
49、between each terminal and the case at 25C as specified in 3.8.1 and 3.8.3. The insulation resistance shall exceed values shown in the detailed parts specification. Capacitance Change at High Ambient Temperature 3.9.1 temperature shown in Table I. Repeat the capacitance measurements of paragraph 3.6 except at the applicable high 3.9.2 Capacitors measured in paragraph 3.9. I shall meet limits specified in Table I. Capacitance Change at Low Ambient Temperature 3.10.1 Repeat the capacitance measurements of paragraph 3.6 except at the applicable low temperature shown i
