Specifications, Radial-Leaded, Mica Capacitors Specifications Capacitance is within tolerance when measured at these frequencies: 1–1000 pF @ 1MHz > 1000 pF @ 1 kHz Dissipation Factor limits are below. Dissipation factor is equal to DF=2πfRC, where f is the test frequency, R is the equivalent series resistance, and C is the capacitance. For other capacitance values, see Figure 1. Capacitance 75–1,000 pF 1,100–3,300 pF 3,600–9,100 pF 10,000 pF Dissipation Factor 0.00075 max at 1 MHz 0.0014 max at 1 kHz 0.0013 max at 1 kHz 0.0012 max at 1 kHz Quality Factor (Q) is the reInsulation Resistance for capacitances up to 10,000 pF is greater than 100 GΩ at 25°C and greater than 10 GΩ at 125°C. For other capacitance values and temperatures, see Figure 2. Withstanding Voltage is 2 times the rated voltage, and can be applied up to 5 seconds without damage. sure the capacitors’ capacitance at 25°C, –55°C, 25°C, 125°C (or 150°C) and at 25°C after stabilizing at each temperature. The capacitance will meet the limits of the Characteristic table shown in Ordering Information. Solderability: After an eighthour steam aging, coat leads with rosin flux (R) and immerse in molten 245°C ± 5°C 60/40 tin/lead solder. Solder coverage will be no less than 95% when examined at 10X magnification. Surge Voltage: Standard dipped capacitors will withstand 500 Vdc max peak transients above rated voltage. For example, in flyback regulators with less than 500 Vdc bias, you may use 500 Vdc-rated capacitors provided that the switching transient peaks are less than 1,000 V. Voltage Coefficient: The change in capacitance from 0 volts to rated voltage is less than 0.1%. Pulse Handling: Standard dipped capacitors will withstand an unlimited number of pulses with a dV/dt of 100,000 V/µs tested per IEC 384-1. Smaller capacitance ratings can withstand even faster dV/dt—ratings have been tested one million discharges at rated voltage into a 4.7Ω resistor with no change in capacitance. For a 100 pF, 500 Vdc unit, that’s a peak dV/ dt in excess of 1,000,000 V/µs. The dV/dt is expressed by this relationship: dV/dt = V R dC RV = rated voltage, Vdc R d = minimum discharge resistor, Ω dC = rated capacitance, µF This is the initial rate of discharge into Rd. Marking is in accordance with EIA RS153B and includes “CD” as our manufacturer’s symbol, nominal capacitance in pF, capacitance tolerance, and dc working voltage followed by V, if other than 500 Vdc. Miniature dipped units (CD6 and CD7) are marked with capacitance in pF and tolerance letter designation. .10 .01 .001 Maximum dissipation factor at 1 MHz for capacitance values of 1,000 pF or less .0001 1 10 Maximum dissipation factor at 1 kHz for capacitance values greater than 1,000 pF 100 1,000 10,000 100,000 INSULATION RESISTANCE (MEGOHMS) MIL-C-5 units (Type CM) are in accordance with MIL-C-5. DISSIPATION FACTOR Radial Leaded Mica Capacitors ciprocal of dissipation factor. Temperature Coefficient and Capacitance Drift: Mea- 100,000 +25°C +85°C +125°C 10,000 +150°C 1,000 100 5 10 CAPITANCE (pF) Figure 1. DF vs. Capacitance 4.016 100 1,000 10,000 62,000 CAPACITANCE (pF) Figure 2. IR vs. Capacitance 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax (508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] CORNELL DUBILIER Your Source For Capacitor Solutions Specifications, Radial-Leaded, Mica Capacitors Specifications Moisture Resistance: Capacitors will meet the requirements of MIL-STD-202, Method 106F as outlined here and diagrammed on the right. Refer to MIL-STD-202 for details. For miniature Types CD6 and CD7, use one 24-hour cycle rather than 10. 1. Dry capacitors for 24 hours in a 50±2°C oven and then allow to stabilize at room temperature. 2. Subject the capacitors to 10 24hour continuous cycles with relative humidity and temperature as shown. 3. 24 hours after completion of the last cycle, the capacitors will show no visual damage and will meet the after-test limits below. Life Test: Subject the capaci- 65±2°C 90–98% RH 8 1–4 3 25±2°C 90–98% RH 2 1⁄2 3 2 1⁄2 hours 2 1⁄2 3 2 1⁄2 –10±2°C uncontrolled humidity with 1.5 times rated voltage applied for 2,000 hours. There will be no visual damage and the capacitors will meet the after-test limits below. After-Test Limits Test Moisture Resistance Life Test IL=Initial Limit Withstand Voltage IL IL Insulation Resistance 30 GΩ IL Capacitance Change (whichever is greater) NV±1% or ±1 pF NV±1% or ±1 pF DF Q 150% IL 150% IL 2/3xIL 2/3xIL NV=Nominal Value CORNELL DUBILIER Your Source For Capacitor Solutions 1605 East Rodney French Blvd. New Bedford, MA 02744 (508) 996-8564, Fax (508) 996-3830 http://www.cornell-dubilier.com E-mail: [email protected] 4.017 Radial Leaded Mica Capacitors tors to maximum operating temperature (+125°C or +150°C) 24-Hour Moisture Resistance Cycle