Application Guide Radial-Leaded Dipped Mica Capacitors 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 below. DF vs. Capacitance 0.0100 IR (M ) DFFactor (%) Dissipation 0.1000 0.0010 Maximum DF a 1 kHz for capacitance values greater than 1,000 pF Maxiumm DF at 1 MHz for capacitance values of 1,000 pF or less 0.0001 1 10 100 1,000 10,000 100,000 Capacitance(pF) (pF) Capacitance Capacitance Dissipation Factor Figure 1. DF vs. Capacitance 75–1,000 pF 1,100–3,300 pF 3,600–9,100 pF 10,000 pF 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 100,000 ºC voltage+25 into a 4.7 Ω resistor with no change in capacitance. For a +85 ºC 100 pF, 500 Vdc unit, that’s a peak dV/ dt in excess of 1,000,000 V/ 10,000 ºC is expressed by this relationship: µs. The +125 dV/dt +150 ºC dV/dt = V / (RdC) 1,000 V = rated voltage, Vdc 62,000 100 Rd = minimum discharge resistor, Ω 10,000 100,000 1 10 100 1,000 C = rated capacitance, µF This is the initial rateCapacitance of discharge(pF) into Rd. 0.00075 max at 1 MHz 0.0014 max at 1 kHz 0.0013 max at 1 kHz 0.0012 max at 1 kHz Marking is in accordance with EIA RS153B and includes “CDM” as our manufacturer’s symbol, nominal capacitance in pF, capacitance tolerance, and dc working voltage followed by V, if other than 500 Vdc. Quality Factor (Q) is the reciprocal of dissipation factor. Moisture Resistance Insulation Resistance for capacitances up to 10,000 pF is greater than 100 GΩ at 25 ºC and greater than 10 GΩ at 125 ºC. For other capacitance values and temperatures, see below. Capacitors will meet the requirements of MIL-STD-202, Method 106F as outlined here and diagrammed below. Refer to MILSTD-202 for details. IR (M ) Insulation Resistance (MΩ) 100,000 Voltage Coefficient: The change in capacitance from 0 volts to rated voltage is less than 0.1%. Figure 2. IR vs. Capacitance IR vs. Capacitance Hz ues pF 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. 100,000 1. Dry capacitors for 24 hours in a 50 ±2 ºC oven and then allow to stabilize at room temperature. +25 ºC +85 ºC 10,000 2. Subject the capacitors to 10 24 - hour continuous cycles with relative humidity and temperature as shown. +125 ºC +150 ºC 1,000 62,000 100 1 10 100 1,000 10,000 100,000 Capacitance(pF) (pF) Capacitance Withstanding Voltage times the rated voltage, and can be Figure 2. is IR2 vs. Capacitance applied up to 5 seconds without damage. 3. 24 hours after completion of the last cycle, the capacitors will show no visual damage and will meet the after-test limits on the next page. 24-Hour Moisture Resistance Cycle 65 ±2 ºC 90-98%RH 8 1-4 Temperature Coefficient and Capacitance Drift: Measure the capacitors’ capacitance at 25 ºC, –55 ºC, 25 ºC, 125 ºC (or 150 ºC) and at 25 ºC after stabilizing at each temperature. The capacitance will meet the limits of the Characteristic table shown in Ordering Information. Solderability: After an eight hour steam aging, coat leads with rosin flux (R) and immerse in molten 245 ºC ±5 ºC 60/40 tin/lead solder. Solder coverage will be no less than 95% when examined at 10X magnification. 3 25 ±2 ºC 90-98% RH 2½ 3 2½ hours 2½ 3 2½ –10 ±2 ºC Uncontrolled Humidity CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830 1 Life Test: Subject the capacitors to maximum operating tempera- For tape and reel or ammo-packed packaging, specify on the ture (+125 ºC or +150 ºC) with 1.5 times rated voltage applied for order. 2,000 hours. There will be no visual damage and the capacitors See the table below for available reel-packed types, lead will meet the after-test limits below. configurations, lead spacing, lead material, pieces per reel and pieces per ammo packs. After-Test Limits Test Withstand Voltage Insulation Capacitance Change DF Q Resistance (whichever is greater) Moisture Resistance IL 30 GΩ NV ±1% or ±1 pF 150% IL 2/3xIL Life Test IL IL NV ±1% or ±1 pF 150% IL 2/3xIL IL = Initial Limit NV = Nominal Value Dipped Mica Capacitors for Auto Insertion Packaging will be in accordance with EIA-468. Dimension “h” will be 16 mm for formed leads or 18 mm for straight leads. 20 mm is available on special request. Specify reel or ammo on your purchase order. Range of Range of Type Lead Lead Capacitance Pieces per Pieces per Number Spacing Material Range Reel Ammo Pack D10 CD10 0.141 CCS 1 - 249 pF 251– 470 pF 471–1200 pF 1000 - 2500 1000–2000 1000–1500 1000 2000 1000–1500 1000 CD15 0.234 CCS 1– 330 pF 331– 470 pF 471–1500 pF 1000–2500 1000–2000 1000–1500 1000–2000 1000–1500 1000 1000–2000 1000–1500 1000 600 600 T max. L max. H max. .078 .250 ±.051 .354 + .030 .709 + .039 – .020 – .020 .202 ±.028 .035 max. h ± .020 S ± .031 .157 ± .012 CD16 CDV16 0.234 CCS 1– 330 pF 1000–2500 331– 470 pF 1000–2000 471–1500 pF 1000–1500 1501–2000 pF 800 > 2000 pF 500 CD19 0.344 CCS 10-1000 pF 1001-1500 pF 1501–3000 pF 3001-5000 pF .500 ± .012 1000 800 600 400 800 800 600 400 CCS = copper clad steel Notice and Disclaimer: All product drawings, descriptions, specifications, statements, information and data (collectively, the “Information”) in this datasheet or other publication are subject to change. The customer is responsible for checking, confirming and verifying the extent to which the Information contained in this datasheet or other publication is applicable to an order at the time the order is placed. All Information given herein is believed to be accurate and reliable, but it is presented without any guarantee, warranty, representation or responsibility of any kind, expressed or implied. Statements of suitability for certain applications are based on the knowledge that the Cornell Dubilier company providing such statements (“Cornell Dubilier”) has of operating conditions that such Cornell Dubilier company regards as typical for such applications, but are not intended to constitute any guarantee, warranty or representation regarding any such matter – and Cornell Dubilier specifically and expressly disclaims any guarantee, warranty or representation concerning the suitability for a specific customer application, use, storage, transportation, or operating environment. The Information is intended for use only by customers who have the requisite experience and capability to determine the correct products for their application. Any technical advice inferred from this Information or otherwise provided by Cornell Dubilier with reference to the use of any Cornell Dubilier products is given gratis (unless otherwise specified by Cornell Dubilier), and Cornell Dubilier assumes no obligation or liability for the advice given or results obtained. Although Cornell Dubilier strives to apply the most stringent quality and safety standards regarding the design and manufacturing of its products, in light of the current state of the art, isolated component failures may still occur. Accordingly, customer applications which require a high degree of reliability or safety should employ suitable designs or other safeguards (such as installation of protective circuitry or redundancies or other appropriate protective measures) in order to ensure that the failure of an electrical component does not result in a risk of personal injury or property damage. Although all product-related warnings, cautions and notes must be observed, the customer should not assume that all safety measures are indicated in such warnings, cautions and notes, or that other safety measures may not be required. 2 CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830