Entering 299C Capacitors
The following table describes the part parameters that may be required for capacitors when 299C is the selected calculation model. The parameters that are shown in the Prediction Data pane depend on part subcategory and type chosen as well as whether Foreign is selected.
The 299C model supports all but the following subcategories of capacitors:
Chip, Silicon
MOS
Parameter
Type
Description
Foreign
Checkbox [Parts Count also]
Indicates whether the device is made in China. If this checkbox is selected, the failure rate of the part is calculated based on Appendix A for the 299C Parts Count or Parts Stress model chosen.
Type
Choice List [Parts Count also]
Required only for the following subcategories: Air Trimmer, Variable (CT); Ceramic, Variable (CV); Other, Variable; Piston, Variable; and Vacuum, Variable or Fixed (CG). Not required if Foreign is selected.
The type of device.
Class Level
Choice List [Parts Count also]
Required only for the following subcategories: Chip, Ceramic (CDR); General Ceramic (CK, CKR); and Temp Compensat, Ceramic (CC, CCR).
The class of the device. Choices are 1, 2, and 3. See Chinese Standard GJB/z 299C for more information.
Quality Level
Choice List [Parts Count also]
The appropriate quality screening level of the device. Accepted quality levels and values for capacitors follow. For the quality value assigned to a specific capacitor, see Chinese Standard GJB/z 299C.
A1L = 0.03
A1P = 0.03
A1W = 0.10
A = 0.30
A1 = 0.30
A2 = 0.30 or 0.45
B1 = 0.50 or 0.75
B2 = 1.00
C = 3.00 or 5.00
C1 = 3.00
Chip Capacitor
Checkbox
Required only for the following subcategories: Chassis Mount, Elec, Alum (CU, CUR); Feed Through, Paper (CZ, CZR); Lead Mount, Elec, Alum (CE); Metallized Paper-Plastic (CH, CHR); Paper (CA, CP); Paper-Plastic (CQ, CQR, CPV); Plastic (CFR); and Super Metallized Plastic (CRH).
Indicates if the device is mounted directly on the board.
Plastic Type
Choice List
Required only for the Plastic (CFR) subcategory.
The type of plastic from which the device is made. Choices are:
Polypropolene, PTFE
Terylene, Polystyrene
Capacitance
Real
Not required for the following subcategories: Air Trimmer, Variable (CT); Ceramic, Variable (CV); Other, Variable; Piston, Variable (PC); and Vacuum, Variable or Fixed (CG). Also not required when Foreign is selected.
The capacitance value of the device. This parameter is used in conjunction with Units to enter the capacitance value.
Units
Choice List
Not required for the following subcategories: Air Trimmer, Variable (CT); Ceramic, Variable (CV); Other, Variable; Piston, Variable (PC); and Vacuum, Variable or Fixed (CG). Also not required when Foreign is selected.
The units for the Capacitance value. Choices are:
F (Farad)
uF (micro Farad = F/1E6)
nF (nano Farad = F/1E9)
pF (pico Farad = F/1E12)
Rated Temperature
Choice List
Required only for the following subcategories: Button Mica (CB); Feed Through, Paper (CZ, CZR); Metallized Paper-Plastic (CH, CHR); Mica (CM, CMR); Paper (CA, CP); Paper-Plastic (CQ, CQR, CPV); Plastic (CFR); and Super Metallized Plastic (CRH). Also required for the following subcategories when the class level is 2 or 3: Chip, Ceramic (CDR); General Ceramic (CK, CKR); and Temp Compensat, Ceramic (CC, CCR). Not required when Foreign is selected.
The rated temperature of the device in degrees C. Choices vary by subcategory.
Series Resistance
Real
Required only for the following subcategories: Chip, Elec (CWR) and Solid, Elec, Tant (CSR). Not required when Foreign is selected.
The circuit resistance of the device.
Seal Type
Choice List
Required only for the following subcategories when Foreign is selected: Chip, Elec (CWR); and Solid, Elec, Tan (CSR).
The type of seal. Choices are:
Sealed
Unsealed
[Voltage Parameters]
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Not required for the following subcategories unless Foreign is selected: Air Trimmer, Variable (CT); Ceramic, Variable (CV); Other, Variable; Piston, Variable (PC); and Vacuum, Variable or Fixed (CG).
For more information, see Voltage Parameters.
[Temperature Parameters}
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Not required for the following subcategories unless Foreign is selected: Air Trimmer, Variable (CT); Ceramic, Variable (CV); Other, Variable; Piston, Variable (PC); and Vacuum, Variable or Fixed (CG).
For more information, see Basic Temperature Parameters.
[Derating Parameters]
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For more information, see Derating Parameters.