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.

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MIL-PRF-123D

Standard Method of Test for Effective Series Resistance (ESR) and Capacitance of

Multilayer Ceramic Capacitors at High Frequencies.

(Copies of these documents are available from https://global.ihs.com/ or Global Engineering Documents, Attn:

Customer Service Department, 15 Inverness Way East, Englewood CO 80112-5776.)

2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited

herein (except for related associated specifications, specification sheets, or MS sheets), the text of this document

takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific

exemption has been obtained.

3. REQUIREMENTS

3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with

the applicable specification sheet. In the event of any conflict between requirements of this specification and the

specification sheet, the latter shall govern.

3.2 Qualification. Capacitors furnished under this specification shall be products that are authorized by the

qualifying activity for listing on the applicable qualified products list at the time of award of contract (see 4.4 and 6.3).

3.2.1 Category A distributors. Category A distributors may be used under the following conditions:

a. The distributor shall be an authorized distributor of the manufacturer in accordance with MIL-STD-790.

b. The distributor shall not open the level of packaging containing the unit containers. This level of packaging

shall bear a stamp stating "Not to be opened by the distributor." The distributor shall not remark or retest

the product.

c. MIL-PRF-123 product shall be handled as a nonstocking item only.

d. The distributor shall be held accountable by the manufacturer to supply the complete data package to the

user with each order.

e. The manufacturer shall be responsible for auditing the distributors to the requirements of MIL-STD-790 and

the limitations and controls as stated herein.

3.3 Qualified Product List (QPL) system. The manufacturer shall establish and maintain a QPL system for

capacitors covered by this specification. This QPL system shall be established and maintained in accordance with

the procedures and requirements specified in MIL-STD-790 and herein.

3.4 Interface and physical dimensions. Capacitors shall meet the interface and physical dimensions specified

(see 3.1).

3.4.1 Dielectric parameters. Capacitors supplied to this specification shall have a minimum dielectric thickness of

0.8 mil for 50 volt rated capacitors or 1 mil for capacitors with ratings above 50 volts. Dielectric thickness is the

actual measured thickness of the fired ceramic dielectric layer. Voids, or the cumulative effect of voids, shall not

reduce the total dielectric thickness by more than 50 percent (see figure 1). Maximum dielectric constant shall be

3000.

3.4.2 Electrode parameters. Nickel electrodes shall not be used in capacitors supplied to this specification.

3.4.3 Lead attachment (leaded capacitors only) (see 3.1). Capacitors with leads shall have the leads attached to

the ceramic chip body using high temperature solder with a minimum liquidus point of +260�C.

3.4.4 Lead wire. Lead wire shall be in accordance with MIL-STD-1276 (see 3.1).