High-Voltage Types Ordering Information, Mica Capacitors Ordering Information Ordering Information: Order by complete part number, as below. For other options,write your requirements on your quote request or purchase order. Cast-Case Part Numbering System 271 30 CDE Type B 470 CapacCapacitance Rated Peak Voltage J Capacitance 470 = 47 pF Tolerance G = ±2% 361 = 360 pF 122 = 1200 pF J = ±5% 10 = 1000 30 = 3000 250 = 25000 Characteristic Temp. Coeff. ppm/°C Capacitance Drift B Not specified Not specified C –200 to +200 ±(0.5% +0.1pF) D –100 to +100 ±(0.3% +0.1pF) E – 20 to +100 ±(0.1% +0.1pF) Standard Cap. Range O Temperature Range 0 Mounting Style O = –55 °C to +125 °C 0 = No mounting plate 1 = Mounting plate on bottom only 2 = Mounting plates on top and bottom 1–18 pF 20–82 pF Potted Case Styles Transmitting mica capacitor type 272 is available in potted case package Type F2. To order this potted style use the part numbering below and contact us. F2 30 B CDE Type Rated Peak Voltage (in hundreds of peak working volts) 470 CapacCapacitance Capacitance Tolerance 470 = 47 pF 361 = 360 pF 122 = 1200 pF Characteristic J G = ±2% J = ±5% (standard) M Temperature Range M = –55 °C to +70 °C Military Style Numbers For the commercial equivalent to military style numbers CM66 through CM93 see the tables below. Military Style No. Equivalent CDE Type Military Style No. Equivalent CDE Type CM66 271, Mounting Style 0 CM81 292, Mounting Style 0 CM67 271, Mounting Style 1 CM82 292, Mounting Style 1 CM68 271, Mounting Style 2 CM83 292, Mounting Style 2 CM70 F2 CM86 293, Mounting Style 0 CM71 272, Mounting Style 0 CM87 293, Mounting Style 1 CM72 272, Mounting Style 1 CM88 293, Mounting Style 2 CM73 272, Mounting Style 2 CM91 294, Mounting Style 0 CM76 291, Mounting Style 0 CM92 294, Mounting Style 1 CM77 291, Mounting Style 1 CM93 294, Mounting Style 2 CM78 291, Mounting Style 2 CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800 • www.cde.com High-Voltage Types Application Guide, Mica Capacitors Type 271 MOUNTING STYLE 0 Type 273 MOUNTING STYLE 1 MOUNTING STYLE 2 TOLERANCES UNLESS OTHERWISE SPECIFIED: ±.031 Type 272 Cast-Case Styles MOUNTING STYLE 0 MOUNTING STYLE 1 MOUNTING STYLE 2 Type 291 MOUNTING STYLE 0 Type 292 MOUNTING STYLE 1 MOUNTING STYLE 2 Type 293 MOUNTING STYLE 0 MOUNTING STYLE 0 MOUNTING STYLE 1 MOUNTING STYLE 2 MOUNTING STYLE 1 MOUNTING STYLE 2 Type 294 MOUNTING STYLE 1 MOUNTING STYLE 2 MOUNTING STYLE 0 CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800 • www.cde.com High-Voltage Types Application Guide, Mica Capacitors CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800 • www.cde.com High-Voltage Types Application Guide, Mica Capacitors Specifications Temperature Cycling Test Conditions Steps Temp Interval (°C) (Minutes) 1 –55 + 0 30 –3 2 25 +10 10 to 15 –5 3 125 + 3 30 –0 4 25 +10 10 to 15 –5 Immersion Test Conditions •Number of cycles: 2 •Duration of each immersion: 15 minutes •Immersion bath: Saturated solution of sodium chloride and water •Temp. of hot bath: 65 –0 +5 ºC •Temp. of cold bath: 25 –0 +10 ºC Life Test: Subject all capacitors to a temperature of 55 °C for 48 hours. Then subject units cast in rectangular cases (Types 271, 272, and 273) to a 60-Hz rms voltage equal to the rated peak voltage for 250 hours. Subject units cast in cylindrical cases (Types 291, 292, 293, and 294) to a 60-Hz rms voltage equal to 90% of the rated peak voltage for 250 hours. In both tests, maintain the temperature at 125 °C. After test, the capacitors will meet these requirements: Withstanding Voltage: As specified under Withstanding Voltage. Insulation Resistance: No less than 7500 MΩ. Capacitance Change: Within the limits given in the table below or one picofarad, whichever is greater. Characteristic Maximum Cap. B ±8% C ±3% D ±3% E ±3% In addition, the capacitor must show no visual damage and the markings must be legible CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800 • www.cde.com Capacitance is within tolerance when measured at these frequencies: 1–1000 pF @ 1 MHz > 1000 pF @ 1 kHz Dissipation Factor is typically less than 0.05% when measured as above. Dissipation factor (DF) equals 2πfRC, where f is the test frequency, R is the equivalent series resistance (Ω), and C is nominal capacitance (F). Q is the reciprocal of the dissipation factor. Operating Temperature Range is –55 °C to +125 °C. Insulation Resistance is no less than 7500 MΩ when measured at 100 Vdc. Temperature Coefficient and Capacitance Drift: Measure the capacitors’ capacitance at 25 °C, 55 °C, 25 °C, 125 °C, and at 25 °C after stabilizing at each temperature. The capacitance will meet the limits of the Characteristic table shown in Ordering Information. Rated Peak Voltage is not to be exceeded in actual use. Voltage ratings are in the listings and apply under the following conditions: Temperature: Within the specified operating temperature range. Altitude: Up to 50,000 feet or 3.4 inches of mercury. Relative Humidity: Up to 80%. Frequency: As specified. Where pulse conditions are en- countered, contact us. Withstanding Voltage: Capacitors will withstand application of an ac potential between terminals having an rms value equal to the rated peak voltage at a frequency of 100 Hz or less without damage, arcing or breakdown. Apply the potential by raising the voltage from zero to the specified value. Apply the full potential for a minimum of 5 seconds. Case Insulation: Capacitor cases will withstand, without damage, arcing or breakdown, a 60-Hz peak ac potential equal to twice the rated peak voltage applied between the terminals connected together and a metal electrode touching the case. Apply this potential for 1to 5 seconds. Current Ratings at various fre-quencies are in the listings and ap-ply under the following conditions: Temperature: 65 °C maximum Derating Factor: None Vibration: Capacitors will withstand vibrational forces occurring at rates of from 10 to 55 Hz for 4½ hours. The total excursion during vibration is 0.06 inches. At the end of this period, make the following inspections and tests: Visual and Mechanical Inspection: No perceptible deterioration. Withstanding Voltage: As specified under Withstanding Voltage. Insulation Resistance: No less than 7500 MΩ. Capacitance Change: Not to exceed 3% of the nominal value or one picofarad, whichever is greater. Temperature and Immersion Cycling: Capacitors will withstand the temperature and immersion cycles indicated in the tables below. Follow three temperature cycles by two immersion cycles. Make the measurements listed below no more than 30 minutes following the final immersion cycle: Withstanding Voltage: As specified under Withstanding Voltage. Insulation Resistance: No less than 7500 MΩ. Capacitance: Change not to exceed 4% of the nominal value or one picofarad, whichever is greater. High-Voltage Types Application Guide, Mica Capacitors 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. CDM Cornell Dubilier • 140 Technology Place • Liberty, SC 29657 • Phone: (864)843-2277 • Fax: (864)843-3800 • www.cde.com