MIL-PRF-123 Capacitors, Fixed, Ceramic Dielectric, \(Temperature Stable And General Purpose\), High Reliability, General Specification ForThis specification covers the general requirements for high reliability, general purpose \(BX and BR\) and temperature stable \(BP and BG\) ceramic dielectric fixed capacitors, leaded and nonleaded for space, missile, and other high reliability applications. Capacitors covered by this specification may be used in critical frequency determining applications, timing circuits, and other applications where absolute stability is required \(BP and BG\), and in applications where appreciable variations in capacitance with respect to temperature, voltage, frequency, and life can be tolerated \(BX and BR\). Life tests in this specification are performed at two times rated voltage at maximum rated temperature, and an assumed acceleration factor of 8:1 is used to relate life test data obtained at two times rated voltage to performance at rated voltage.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16

MIL-PRF-123D

3.24.3 Marking (chip capacitors). Capacitors shall be legibly marked in a contrasting color in accordance with

either of the two options. (NOTE: Packaging containers shall be marked with the PIN, capacitance, capacitance

tolerance, voltage, "JAN" brand, lot date code, and the CAGE code.) Other markings which in any way interfere with,

obscure, or confuse those specified herein are prohibited.

a. Option A: In accordance with table VII.

b. Option B: In accordance with table VIII using a two character system. The first character shall be an

alphabetic symbol and shall designate the first and second significant figures. The second character shall

be a numerical digit and shall designate the decimal multiplier of capacitance in pF (e.g., A1 = 1 x 10 = 10

pF, J5 = 2.2 x 10 = 0.22 x 10 0.22 �F). The marking shall appear in black or legible contrast. The size

and orientation of the marking shall be the option of the manufacturer. At the option of the manufacturer, the

capacitor may be laser marked with the manufacturer's trademark or symbol and the capacitance code in

accordance with table VIII.

Additional marking may appear provided that it does not interfere with the required marking.

3.25 Workmanship. Capacitors shall be processed in such a manner as to be uniform in quality when using 10X

magnification. External leads shall not exhibit cuts, nicks or scrapes exceeding 10 percent of the diameter for round

and flat lead wire parts, except as follows:

a. Round leads: Within .050 inch of the body of the component, 10 percent of the surface area of the leads

may exhibit bare base metal. These capacitors are not expected to be solderable within .050 inch of the

case.

b. Flat leads (styles CKS22, CKS23, and CKS24): Surface of lead may exhibit bare base metal on edges

except on installation portion of lead. These capacitor leads are not expected to be solderable above the

plane of the body mounting base.

3.26 Supplying to looser capacitance tolerance and lower rated voltage. Parts qualified and marked to tighter

capacitance tolerance or higher rated voltage, with procuring agency approval, are substitutable for parts marked to

looser capacitance tolerance or lower rated voltage, provided all other values, such as case size, characteristic, and

leads are the same. The substitutable parts shall not be remarked unless specified in the contract or purchase order

(see 6.2), the lot date codes on the parts are unchanged, and the workmanship criteria is met.

3.27 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally

preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the

operational and maintenance requirements, and promotes economically advantageous life cycle costs.