scope:

This specification covers the general requirements for established reliability (ER), general purpose, ceramic multilayer high voltage capacitors for use in applications where appreciable variations in capacitance with respect to temperature, voltage, frequency, and life can be tolerated (BR and BZ characteristics) (see 6.1), or in critical frequency determining applications, timing circuits, and other applications where absolute stability is required (BP characteristic). Capacitors covered by this specification have failure rate levels ranging from 1.0 to 0.001 percent per 1,000 hours. These failure rate levels are established at a 60 percent confidence level and maintained at a 10 percent producer's risk and are based on life tests performed at maximum rated voltage at maximum rated temperature. A part per million (PPM) quality system is used for documenting and reporting the average outgoing quality of capacitors supplied to this specification. Statistical process control (SPC) techniques are required in the manufacturing process to minimize variation in production of capacitors supplied to the requirements of this specification.

Capacitors covered by this specification should be classified by the style, as specified (see 3.1).

Capacitors specified herein (see 3.1) should be identified by a PIN which should consist of the basic number of the military specification and a coded number. The coded number should provide information concerning the characteristic, specification sheet number, capacitance, capacitance tolerance, and failure rate level. The PIN should be in the following form with the coded number derived as indicated: Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: US Army laboratory Command, ATTN: SLCET-R-S, Fort Monmouth, NJ 07703-5000 by using the self-addressed standardization Document Improvement Proposal DD Form: 1426 appearing at the end of this document or by letter.

The characteristic refers to the voltage-temperature limits of the capacitor. The first letter (B) (not shown) identifies the rated temperature range of −55°C to +125°C. The second letter indicates the voltage temperature limits as shown in table I. TABLE I. Characteristic.

Capacitance change with reference to +25°C ----------------------------------------------------------------------------- Symbol Steps A to D inclusive of Rated Steps E and G inclusive table VIII voltage of table VIII ----------------------------------------------------------------------------- P 0 ±30 PPM/°C 100% 0 ±30 PPM/°C R ±15% 100% +15, −40% Z ±15% 40% +15, −25% 60% +15, −40%

The nominal capacitance value, expressed in picofarads (pF) is identified by a three digit number; the first two digits represent significant figures and the last digit specifies the number of zeros to follow.

The capacitance tolerance is identified by a single letter in accordance with table II. TABLE II. Capacitance tolerance.

Symbol Capacitance tolerance ----------------------------------- J ±5% K ±10% M ±20%

The failure rate level should be as specified in table III. TABLE III. FR level (established at a 90 percent confidence level).

Symbol FR level ---------------------------------- Percent/1,000 hours M 1.0 P 0.1 R 0.01 S 0.001

intended Use: