INCH POUND
MIL-PRF-123D
7 December 2005
SUPERSEDING
MIL-PRF-123C
27 March 2003
PERFORMANCE SPECIFICATION
CAPACITORS, FIXED, CERAMIC DIELECTRIC,
(TEMPERATURE STABLE AND GENERAL PURPOSE), HIGH RELIABILITY,
GENERAL SPECIFICATION FOR
This specification is approved for use by all Departments
and Agencies of the Department of Defense.
1. SCOPE
1.1 Scope. This 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.
1.2 Classification.
1.2.1 Part or Identifying Number (PIN). Capacitors specified herein (see 3.1) are identified by a PIN which
consists of the basic number of the performance specification sheet followed by a series of coded characters. Each
performance specification sheet covers a different capacitor style. The coded number provides information
concerning the capacitors' characteristic, working voltage, capacitance value, capacitance tolerance, and termination
material. The PIN is in the following form:
M123
A
01
BX
B
103
K
C
Termination
Capacitance
Characteristic
Voltage
Performance Modification
Slash
Capacitance
(see 1.2.1.6)
tolerance
(see 1.2.1.2) (see 1.2.1.3)
Specification (see 1.2.1.1)
sheet
Value
(see 1.2.1.5)
(see 1.2.1.4)
number
number
*
1.2.1.1. Modification. The modification letter is used to indicate the latest characteristic of the part in the
specification sheet. Letter "A" was the original characteristic for all parts. This letter will be changed by DSCC when
necessary.
1.2.1.2 Characteristic. The characteristic refers to the voltage-temperature limits of the capacitor. The first letter
(B) identifies the rated temperature range of -55°C to +125°C. The second letter indicates the voltage-temperature
limits as shown in table I.
Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center,
Columbus, DSCC-VAT, Post Office Box 3990, Columbus, OH 43218-3990 or e-mailed to
capacitorfilter@dla.mil. Since contact information can change, you may want to verify the currency of this
address information using the ASSIST Online database at https://assist.daps.dla.mil.
AMSC N/A
FSC 5910
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