scope:

This specification covers the general requirements for voltage sensitive resistors (varistors) to be used for suppressing transients in electronic circuitry.

The resistors specified herein (see 3.1) shall be identified by a PIN which shall consist of the basic number of the detail specification and a coded number. The PIN shall be in the following form:

The nominal voltage value expressed in volts is identified by a four-digit number; the first three digits represent significant figures and the last digit specifies the number of zeros to follow.

Example: 1000 = 100 volts 1001 = 1,000 volts 1002 = 10,000 volts

Minimum and maximum voltage values shall be as specified (see 3.1). The standard values for every decade shall follow the sequence demonstrated for the "10 to 100" decade. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: 645 Logistics and Operations Group, Electronic Support Division, Gentile Air Force Station, Dayton OH 45444-5400, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

The voltage tolerance is identified by a single letter in accordance with table I. TABLE I. Voltage tolerance.

Letter Voltage tolerance -------------------------- Percent (%) A ±15 B ±10 C ±5 D +10, −5 E +5, −10 F +10, −0

intended Use: