MIL-PRF-39018.7B-2007.pdf

MIL-PRF-39018/7B 16 May 2007 SUPERSEDING MIL-PRF-39018/7A 12 December 2001 PERFORMANCE SPECIFICATION SHEET CAPACITORS, FIXED, ELECTROLYTIC (ALUMINUM OXIDE) (POLARIZED), (FOUR-TERMINAL), ESTABLISHED RELIABILITY STYLE CUR19 (INSULATED) This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-PRF-39018. NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only and are based upon 1.00 = 25.4 mm. 3. Metric equivalents are in parentheses. 4. These capacitors are not intended to be mounted by their leads. 5. There is an indeterminate resistance between the metal case and the negative terminals. 6. Example of marking and its relative location on the capacitor body FIGURE 1. Style CUR19 capacitors. AMSC N/A FSC 5910 INCH-POUND Source: http:/ - Downloaded: 2008-03-07T09:34Z Check the source to verify that this is the current version before use. MIL-PRF-39018/7B 2 INSULATED DIMENSIONS INCHES L Case size Min Max Max. Dia Typical weight (GRAMS) H1 1.625 1.843 .785 20.3 H2 2.125 2.343 .785 26.8 H3 2.625 2.843 .785 33.2 H4 3.125 3.343 .785 39.7 H5 3.625 3.843 .785 45.9 J1 1.625 1.843 .910 26.9 J2 2.125 2.343 .910 36.2 J3 2.625 2.843 .910 45.4 J4 3.125 3.343 .910 55.0 J5 3.625 3.843 .910 64.0 K1 1.625 1.843 1.035 34.3 K2 2.125 2.343 1.035 45.9 K3 2.625 2.843 1.035 57.2 K4 3.125 3.343 1.035 68.5 K5 3.625 3.843 1.035 81.9 FIGURE 1. Styles CUR19 capacitors - Continued. Inches mm .002 .05 .008 .20 .015 .38 .040 1.02 .625 15.88 .785 19.94 .910 23.11 1.035 26.29 1.625 41.28 1.843 46.81 2.125 53.98 2.343 59.51 2.625 66.68 2.843 72.21 3.125 79.38 3.343 84.91 3.625 92.08 3.843 97.61 Source: http:/ - Downloaded: 2008-03-07T09:34Z Check the source to verify that this is the current version before use. MIL-PRF-39018/7B 3 TABLE I. Style CUR19 capacitors. DC leakage Dash number 2/ DC rated voltage 105C Capaci- tance DC surge voltage ESR (max) 120Hz , 25C Imped- ance (max) 25C 10 kHz 1MHz 25C 85C duration and direction of motion - In accordance with method 204 of MIL-STD-202. Thermal shock and immersion: Thermal shock: Method 107 of MIL-STD-202, condition A, except in step 3, units shall be tested at applicable high temperature. Immersion: Method 104 of MIL-STD-202, condition B (2 cycles, 30 minutes). DCL - See table I. Cap. - Within 5 percent of initial measured value. ESR - See table I. Case insulation - Shall meet initial requirements. Surge voltage: DCL - See table I. Cap. - Within 6 percent of initial measured value. ESR - See table I. Moisture resistance: Method 106 of MIL-STD-202. DCL - See table I. Cap. - Within 6 percent of initial measured value. ESR - See table I. Case insulation - Shall meet initial requirements. High temperature exposure (500 hours at 105C). DCL - Not more than 200 percent of initial requirement. Cap. - Within 10 percent of initial measured value. ESR - Not more than 115 percent of initial requirement. Resistance to solvents: In accordance with MIL-PRF-39018. Source: http:/ - Downloaded: 2008-03-07T09:34Z Check the source to verify that this is the current version before use. MIL-PRF-39018/7B 9 High temperature verification: In accordance with MIL-PRF-39018 at 105C with rated voltage applied. DCL - See table I. Cap. - Within 10 percent of initial measured value. ESR - Not more than 130 percent of initial requirement. Reverse voltage aging: In accordance with MIL-PRF-39018. Marking: In accordance with MIL-PRF-39018. Part or Identifying Number: M39018/07-(dash number from table I). The complete dash number will include additional letter symbol (s) as shown in table I. OPERATION NOTES: 1. Application. The 4-terminal axial leaded capacitor is designed for high frequency applications where low ESR, inductance and impedance are required. The advantage of 4-terminal construction over 2-terminal construction is that the impedance decreases above 10 kHz. 2. 10 kHz - 1 MHz Impedance. Measurements are made using a voltage divider network as shown in figure 2. The impedance value of the capacitor is then calculated from the ratio of the voltages across the known impedance and the unknown impedance as follows: X R X V V R Z= FIGURE 2. Voltage divider network. Source: http:/ - Downloaded: 2008-03-07T09:34Z Check the source to verify that this is the current version before use. MIL-PRF-39018/7B 10 3. DC current. Unlike 2-terminal capacitors, the dc current flows through the capacitor and contributes to the operating temperature. The temperature rise (TL) due to the dc current may be determined from figure 3. The ability of the external leads to carry the desired current should be taken into consideration. Lead length and heat sink qualities of the printed circuit board and capacitor will affect the current capability. FIGURE 3. DC current vs. temperature rise. 4. Ripple current. The rms ripple current which will result in a 10C in