This standard applies to high-voltage ceramic capacitors with a defined temperature coefficient (Class 1 dielectric) used in electronic equipment. The purpose of this standard is to specify preferred ratings and characteristics for this type of capacitor, select applicable quality assessment procedures, test and measurement methods from GB 2693 "Fixed capacitors for electronic equipment Part 1: General specification", and give general characteristic requirements. The test severity and requirements specified in the detailed specification shall have the same or higher performance level as this sub-specification, and shall not be lower than the performance level of this sub-specification. GB/T 9320-1988 Fixed capacitors for electronic equipment Part 8 (1): Sub-specification Class 1 high-voltage ceramic capacitors (available for certification) GB/T9320-1988 Standard download decompression password: www.bzxz.net

.1 General
National Standard of the People's Republic of China
Fixed capacitors for use in electronic equipment Part 8 (1): Sectional specification Class 1 high voltage ceramic dielectric capacitors
Fixed capacitors for use in electronic equlpment Part&(1) :Sectional specificatlon :Fixed class high voltageceramic dielectric capacitors(available for certification)
1.1 Scope
GB 9320—88
This standard applies to high voltage ceramic dielectric capacitors with a defined temperature coefficient (class 1 dielectric) for use in electronic equipment. 1.2 Purpose
The purpose of this standard is to specify the preferred ratings and characteristics for this type of capacitors and to select the applicable quality assessment procedures, test and measurement methods from GB 2693 &Fixed capacitors for use in electronic equipment Part 1: General specification and to give general characteristic requirements. The test severity and requirements specified in the detailed specification shall have the same or higher performance level as this sub-specification and shall not be lower than the performance level of this sub-specification.
1.3 Related documents
GB 2691 Resistors and capacitors marking content and marking method GB 2471 Nominal resistance series of resistors and nominal capacity series of fixed capacitors for electronic equipment and their allowable deviation series GB2421
GB2423 Basic environmental testing procedures for electrical and electronic products GB2424
GB2693 (IEC3841, QC300000) Fixed capacitors for electronic equipment Part 1: General specification (for certification purposes) GB2828 Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) [ECQ001001 (1981) IFC Basic Regulations of the Quality Assessment System (IECQ) for Electronic Components IECQ001002 (1981) FEC Rules of Procedure for the Quality Assessment System (IECQ) for Electronic Components GB321 Priority numbers and priority number systems
1.4 Contents to be given in the detailed specification
The detailed specification shall be formulated in accordance with the relevant blank detailed specification. A detail specification shall not specify requirements less stringent than those specified in a general specification, a sectional specification or a blank detail specification. When more stringent requirements are included, they shall be listed in 1.9 of the detail specification and shall be indicated in the test schedule, for example by a footnote. NOTE For convenience, the contents of 1.4.1 may be presented in tabular form. The following shall be specified in each detail specification and the values ​​quoted shall be selected in preference to those given in the corresponding clauses of this specification. 1.4.1 Outline Drawings and Dimensions
There shall be an outline drawing of the capacitor as an aid to easy identification and comparison with other capacitors. Dimensions affecting interchangeability and mounting and their permissible deviations shall be given in the detail specification. All dimensions shall be given in millimetres. Approved by the Ministry of Electronics Industry of the People's Republic of China on October 30, 1987, and implemented on February 1, 1989
GB 9320-88
Generally, the length, width, height and lead spacing of the capacitor body should be given, while the diameter and length of the capacitor body and the diameter and length of the capacitor lead terminals should be given for cylindrical ones. If necessary, for example: when the detailed specification includes more than ~ types of values ​​(capacitance/voltage range), the dimensions and allowable deviations should be included in a table below the figure. When the shape is not the above shape, the detailed specification should give dimensional data sufficient to describe the capacitor. When the capacitor is not designed for printed circuit boards, it should be clearly stated in the detailed specification. 1.4.2 Installation
The detailed specification should specify the installation method used for positive use and in vibration and collision (or impact) tests. The capacitor should be installed in its normal manner. The design of a capacitor may require special mountings for use. In this case, the detail specification shall give drawings depicting such mountings and such mountings shall be used in the vibration and impact (or shock) tests. 1.4.3 Ratings and Characteristics
The ratings and characteristics shall comply with the relevant provisions of this subspecification and with the following provisions. 1.4.3.1 Nominal Capacitance Range
See Item 2.2.4.1.
Note: When the capacitance range of a product approved in accordance with a detail specification differs from that of the detail specification, the following statement shall be added: "The valid range of capacitance values ​​for each voltage is given in the list of qualified products". 1.4.3.2 Special Characteristics
When special characteristics are considered necessary for the purpose of design and application, they may be listed as additional characteristics. 1.4.3.3 Soldering
For solderability and resistance to soldering heat, the detail specification shall specify the applicable test methods, severities and requirements. 1.4.4 Marking
The detailed specification shall specify the marking contents on the capacitor and on the packaging. Differences from 1.6 of this sub-specification shall be specifically stated. 1.5 Terminology
In addition to the applicable terms and definitions of GB 2693, the following definitions shall be used: 1.5.1 Class 1 high-voltage ceramic dielectric capacitor
is a capacitor specially designed for use in high-voltage resonant circuits with Uk ≥ 0.63 kV, and for use in places where low losses and high capacitance stability are required and where the temperature coefficient is clearly specified. For example, it is used for temperature compensation in circuits. The ceramic dielectric is determined by its nominal temperature coefficient (μ). 7.5.2 Grade
For a given nominal temperature coefficient, the grade is determined by the allowable deviation of the nominal temperature coefficient (see Table 2 of Item 2.2.5.3). Note: The nominal temperature coefficient and its allowable deviation are for humidity between +20 and +85°C, but, in practice, the temperature coefficient curve is not a strict straight line. For other temperatures, the limits of the capacitance shift (4C/C2) must be specified (see Table 2 of Item 2.2.5.3). These data are illustrated in graphical form in Figures A1 to A15.
These graphs enable the user to determine the differential temperature coefficient - (%) T at a given excitation. The allowable deviation and value of the capacitor can be estimated. Although this value is not required to be measured during the test.
1.5.3 Rated voltage (Uk)
The rated voltage is the maximum DC voltage that can be continuously applied between the terminals of the capacitor at the rated temperature. Note: The sum of the DC voltage and the peak value of the AC voltage applied to the capacitor shall not exceed the rated voltage. The peak value of the AC voltage shall not exceed the value specified by the allowable reactive power.
1.6 Marking
Article 2.4 of GB2693 and the following instructions:
1.6.1 The content given in the marking is usually selected from the following items. The relative importance of each item is indicated by its position in the order of items.
Nominal capacitance;
CB9320-88
Rated voltage (DC voltage can be represented by the symbol = or -) tNominal capacitance base allowable deviation:
Temperature coefficient code and position permit, temperature coefficient allowable deviation code (see 2. 2. 5.3 Table 2); year and month (or week) of manufacture;
name or trademark of manufacturer;
climate category;
product model name:
detailed specification based on.
1.6.2 Table 2 (see 2.2.5. 3) specifies the code for temperature coefficient. When color codes are used, they can be represented by dots, strips or rings. In addition, when two colors are required to mark the temperature coefficient, the second color can be its own color or a printed color. 1.6.3 Item a of 1.6.1 and other items that must be considered should be clearly marked on the capacitor. Repeated content should be avoided on the markings on the capacitor.
1.6.4 All items listed in 1.6.1 should be clearly marked on the packaging of the capacitor. 1.6.5 Any additional marking that does not cause confusion is allowed. 2 Preferred ratings and characteristics
2.1 Preferred characteristics
The characteristic values ​​given in the detailed specifications shall be given priority from the following numbers The capacitors included in this specification are classified into climate categories according to the general provisions of GB2421 (IEC68-1). The lower and upper category temperatures and the duration of the steady-state damp heat test should be selected from the following values. 1 Lower category temperature: -55, -40, -25, -10℃, upper category temperature, +70, +85, +100, +125℃: The duration of the steady-state damp heat test is 4, 10, 21 and 56d. The severity of the cold and dry heat tests is the lower and upper category temperature respectively. 2.2 Preferred rated values ​​
2.2.1 Rated temperature
The rated temperature of the capacitors included in this specification is equal to the upper category temperature. 2.2.2 Rated voltage (U)
The preferred values ​​of rated voltage are: 0.63k1kV, 1.6kV, 2.5kV, 5kV, 6.3kV, 10k and 16kV. These values ​​conform to the preferred value R5 basic series given in GB 321. If other values ​​must be used, they should be selected from the R10 series. 2.2.3 Category voltage (Uc)
According to the definition of Section 2.2.17 of GB2693, because the rated temperature is specified as the upper category temperature, the category voltage is equal to the rated voltage.
2.2.4: Preferred values ​​and allowable deviations of nominal capacitance 2.2.4.1 Preferred values ​​of nominal capacitance
The nominal capacitance should be selected from the E6, E12 and E24 series in GB2471. 2.2.4.2 Preferred allowable deviation of nominal capacitance Preferred series
2.2.5 Temperature coefficient (α)
GB 9320—88
Allowable deviation
Cr ≥10pF
±0. 25pF
Cr<.10pF.
2.2.5.1 In Table 2 of Item 2.2.5.3, the preferred temperature coefficients and allowable deviations expressed in parts per million per degree Celsius (10-/℃) and the corresponding grades and codes are specified. The detailed specification shall specify the minimum capacitance for each temperature coefficient. The minimum capacitance for the allowable deviation of a given temperature coefficient can be verified. However, the accuracy of the specified capacitance measurement method shall be considered. For capacitances less than these minimum values:
The detail specification shall specify the factor by which the permissible deviation of the temperature coefficient is to be multiplied, and the permissible change in capacitance at the lower and upper category temperatures.
b. Where necessary, special methods of measurement may be used, which, if required, shall be stated in the detail specification. 2.2.5.2 Table 3 of Item 2.2.5.3 specifies the permissible relative change in capacitance expressed in parts per million per degree Celsius (10-/°C) for each combination of temperature coefficient and permissible deviation, and at the upper and lower category temperatures.
2.2.5.3 Figures A1 to A15 [Appendix A (Supplement) 3] show the limits of capacitance change as a function of temperature for a given temperature coefficient and class.
Nominal temperature coefficient
106/℃
Nominal temperature coefficient allowable deviation
10-\/℃
Letter code
Allowable deviation
Temperature coefficient color code
Red+purple
Nominal temperature coefficient
10-/℃
—15023
-10001
—1500
—2200
—3300
-4 700
—5 600
+1402 a2-1000
+2502a21750
GB9320-88
Continued Table 2
Nominal temperature coefficient allowable deviation
10-/℃
±1 000
±1000
Letter code
Allowable deviation
Temperature coefficient color code
Red+yellow
Orange+orange
Yellow+orange
Green+orange
Blue+orange
Black+black
GB 9320—88
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3 Quality Assessment Procedure
3.1 Initial Manufacturing Stage
GB 9320-88
The initial manufacturing stage is the formation of dielectric metallization electrodes. 3.2 Structural Similar Components| |tt||Capacitors manufactured with the same process and materials but with different dimensions and values ​​can be considered as capacitors with similar structures.
3.3 Release batch certification records
When detailed When the specification stipulates and the user has requirements, the requirements of Section 3.5.1 of GB2693 shall be followed. The requirements for variable parameter data after the durability test are capacitance change, loss tangent and insulation resistance. 3.4 Approval
The procedure for identification and approval testing is specified in Article 3.4 of GB 2693. The list of identification and approval testing based on batch and periodic testing is specified in Article 3.5 of this specification. The procedure for using a fixed sample size schedule is specified in 3.4.1 and 3.4.2 below. 3.4.1 Sampling procedure for identification and approval based on fixed sample sizes GB 2693, 3.4.2, item b., specifies the procedure for fixed sample sizes. Procedure. The sample shall be sufficient to represent the range of capacitors for which approval is sought. This range may or may not be the entire range covered by the detail specification. The sample shall consist of samples having the lowest and highest voltages and the smallest and largest capacitances at those voltages. When the rated voltage has more than four values, one of the intermediate voltages should also be tested. Thus approval of a range requires testing of either four values ​​or six values ​​(capacitance/voltage combinations). When the range consists of fewer than four values, the number of samples tested shall be four. When only one temperature coefficient is sought for approval, the sample drawn shall consist of samples having the lowest and highest voltages and the smallest and largest capacitances at those voltages. When the rated voltage is more than four values , one of the intermediate voltages shall also be tested. Approval of a range thus requires testing at either of the four or six values ​​(capacitance/voltage combinations) of each temperature coefficient. There are less than four When the temperature coefficient is composed of four values, the number of samples to be tested shall be based on the requirements for four values. When more than one temperature coefficient is sought for approval at the same time, see 3.4.2.
Backup samples are allowed in accordance with the following circumstances: One of each value can be used to replace samples that are allowed to fail in the "\ group. a.
b. One of each value can be used to replace samples that fail due to non-manufacturing reasons. "0" The sample size specified in the group is the sum of the sample sizes used in all test groups. If this is not the case, the sample size may be appropriately reduced.
When adding a test group to the list of approved tests, "0" Group Laboratory The number of samples required shall be increased by the sample size required for the additional test groups.
The number of samples required for each group or subgroup of the qualification approval test and the number of non-conforming products allowed are specified in Table 4. 3.4.2 Tests
For a batch of capacitors covered by a detail specification, all the tests specified in Tables 4 and 5 are necessary. The tests in each group shall be carried out in the order specified. || tt||All samples should be tested in group "0" before being assigned to other groups. Samples found to be unqualified in group "0" cannot be used in other groups. All or part of When approval is sought for more than one temperature coefficient at the same time, the samples for Groups 1 and 2 tests shall be drawn according to the smallest temperature coefficient. The samples for the group test shall be individually tested for each temperature coefficient. The tests based on individual temperature coefficients shall be approved according to the allowable number of nonconforming products shown in columns 6, 7, 9 and 10 of Table 4. Total number of nonconforming products, nonconforming products in groups 1 and 2 are only the minimum temperature coefficient (compare with columns 7 and 10). The minimum temperature coefficient in group 1 GB9320-88
and group 2 The defective products are added to 3,4, 5 and 6 groups of individual temperature coefficients. Setting approval shall be given when the number of nonconforming items does not exceed the permitted number of nonconforming items specified for each group or subgroup and does not exceed the permitted number of nonconforming items in total.
Note: Tables 4 and 5 together constitute the fixed sample size test schedule. Table 4 includes the sampling details and the permitted number of nonconforming items for the different tests or test groups, while Table 5, together with the test details included in Chapter 4, gives a complete summary of the test conditions and performance requirements, as well as indicating the test methods or test conditions that must be used in the detail specification.
The test conditions and performance requirements of the fixed sample size test schedule shall be consistent with those specified in the detail specification for quality conformity inspection. Table 4 Sampling plan for identification and approval test and the allowable number of unqualified products 2
Test group
Appearance inspection
Capacitance
Loss tangent
Insulation resistance
Withstand voltage
Backup sample
Terminal strength
Connection heat resistance
Removability
Rapid temperature change\)
Avoid maximum shock\
Climate sequence
Steady-state heat diffusion
Durability
Temperature coefficient and cyclic migration
Charge and discharge test "
Clause 4.9 or 4.10 of this specification
Note: 1) According to the requirements of the detailed specification.
Each"
2) No more than one unqualified product is allowed in any one value. 3) Capacitance/voltage combination, see 3.4.1, 4) U210kV capacitors are subject to this test, 5) Uz<10kV insulators, column 7 is 4, column 10 is 6. 5
Number of samples (a) and number of permissible nonconforming products (pd) are four values ​​or less\test
Test according to six values"
GB9320-88
Table 5 Approval test list| |tt||Note, ① The test items and performance requirements are quoted from Chapter 4, Test and Measurement Procedures, Table: D
Clause number and test items
(See Note ①)
4.1 Appearance inspection
4.1 Dimensions (detailed)
4.2.1 Capacitance
4.2.2 Loss tangent
4.2.3 Insulation resistance
4. 2. 4 Withstand voltage
1A group
4.4 Terminal strength
4.5 Resistance to soldering heat
4. 5. 1 Initial measurement
4. 5. 3 Final measurement
4.6 Solderability
4.7 Rapid temperature change
4.7.1 Initial measurement
4.8 Vibration
Destructive; ND
-Non-destructive,
D or ND
(See Note ②)
Test conditions
(See Note ①)
Frequency:
Frequency:
(Same as 4.2.1)||tt ||Method see detailed specification
Method see detailed specification
Appearance inspection
No pretreatment, method see detailed specification
Specification (1A or 1B)
Capacitance
Appearance inspection
Capacitance
No predrying
Method see detailed specification
B, lower limit category intensity
Product, upper limit category temperature
Five ohm cycles
Duration: 1 =30 min
Recovery, 24±2 h
Capacitance
Appearance inspection
Number of samples ()
And unqualified products allowed
See Table 4
See Table 4
See Table 4
See Table 4
Installation method See detailed specification procedures
Frequency range:
Amplitude 0.75 mtn or acceleration
98 m/s* (the smaller of the severity)
Total duration 16b
Performance requirements
(See Note)
According to 4.1 The markings are clear and meet the requirements of the detailed specifications. See the detailed specifications. Within the specified allowable range, according to 4.2.2.2. According to 4.2.3.2. No breakdown or flying heads. No visible damage. No visible damage, clear markings. 4C/C According to 4.5.3. As applicable, the package is well dried with free flow of wet solder or solder flowing in the package. No visible damage. Clause number and test items (see note) 4.8.2 Final inspection 4. 9 Impact (or shock, see 4.10
4.10 Breakout (or collision, see 4.9
4.9, 3 or 4.10.3 Final measurement
1.11 Sequence
4.11.2 Heat
4.11.3 Cyclic damp heat
Test [F, first cycle
1.11.4 Cold
4.11.5 Low pressure
(if required by the detailed specification)
1. 11. 5. 3 Intermediate measurement
4.11.6 Cyclic damp heat
Test Dd, remaining cycles
4.11.6.3 Final measurement
4.12 Steady-state damp heat
1,12.1 Initial measurement
D or ND
(See Note ②)
GB 9320 --88
Continued Table 5
Test items
(See Note ①)
Appearance inspection
Installation method see detailed specification
Number of collisions: times
Acceleration tm/s
Pulse duration:
Installation method see detailed specification
Acceleration:
Pulse duration:
Appearance inspection
Capacitance
Temperature, upper limit category Temperature
Duration, 16 h
Temperature, lower limit category Intensity
Duration, 2 h
Appearance inspection
Air pressure:
Appearance inspection
Recovery, 1~2 h or 6~24 h
Applicable conditions
Appearance inspection
Capacitance
Change loss angle tangent
Insulation resistance
Capacitance
Recovery?1~2h or 624h
According to applicable
Number of samples ()
And the number of unqualified products allowed
See Table 4
See Table 4
Performance requirements
(See note)
No visible damage
No visible damage, clear marking
AC/C According to 4.10.3
No visible damage
No breakdown or arcing
No visible damage, clear marking
A:/C According to 4.11.6. 3 items
According to item 1.11.6.3
According to item 4.11.6.3
Clause number and test items
(See Note ①)
4, 12. 5 Final measurement
4.13 Durability
4.13.1 Initial measurement
4. 13. 4 Final measurement
4.3 Temperature coefficient and cycle drift
4.14 Capacity (applicable
U≥10 kV)
4.14.1 Intermediate measurement
4.15 Charge and discharge test (applicable
r≥10kV)
4. 15. 1 Initial measurement
4.15.4 Final measurement
3.5 Quality consistency test
3.5.1 Composition of inspection lot
a. Inspection of group A and group B
D or ND
(See Note ②)
GB 9320—88
Continued Table 5
Test conditions
(See Note)
Appearance inspection
·Capacitance
Loss tangent
Insulation resistance
Duration,1 000 h
Capacitance
Recovery24±2 h
Appearance inspection
Capacitance
Electric loss tangent
Insulation resistance
Condition, pre-drying for 16~24h
Electric purchase
Condition?3kVrmB50Hz
AC voltage
Discharge charge
Condition: rated voltage
Charge and discharge times: 10000 times
Capacitance
Recovery: 8±1h
Capacitance
Electric loss tangent
Insulation resistance
Aldehyde voltage
These tests should be carried out on the basis of batch inspection. Number of samples (a)
and number of allowable non-conforming products
see Table 4
see Table 4
see Table 4
see Table 4
The manufacturer may group the products currently in production into one inspection lot in accordance with the following provisions. (1) The inspection lot shall consist of capacitors of similar construction (see 3.2). (2a) The test samples for group A shall consist of each size and each value included in the inspection lot. The sample size shall be determined based on the size of the batch. Performance requirements
(Note)
No visible damage, clear markings
AC/C according to 4.12.5
According to 4.12.5
Connect to 12.5
No visible damage, clear markings
ZC/C according to 4.13.4
According to 4.13.4
According to 4.13.4
According to 4.13.4
2C/C according to 4.3.3
According to 4.14.1
/C according to 4.15.4
According to 4.15.4
According to 4.15.4
According to 4.15,4
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