EIA/IS 34-1987

$30.55

Leaded Surface Mount Resistor Networks Fixed Film

Published By	Publication Date	Number of Pages
ECIA	1987	36

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Category: ECIA

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Description

This industry standard covers the general requirements for
cermet or metal film type resistor networks, primarily intended for
incorporation into electronic circuits.

Classification

Networks specified herein (see 3.1) shall be identified by a
part number which shall consist of the basic style and a dash
number. Each article sheet covers a different network style. The
dash number shall be coded to provide information concerning the
network characteristic, resistance value, resistance tolerance and
schematic.

Style

The style is identified by the three-letter symbol "RZS"
followed by a three-digit Number.

Characteristic

The resistive Characteristic is identified by the single letter
H, K or M.

Resistance

Equal Resistors – When all resistance values in the network are
identical, the nominal resistance expressed in ohms is identified
by four digits. Standard values are shown in Table II. The first
three digits represent significant figures and the last digit
specifies the number of zeros to follow. When the value of
resistance is less than 100 ohm, or when the fractional values of
an ohm are required, the letter "R" should be substituted for one
of the significant digits to represent the decimal pint. When the
letter "R" is used, succeeding digits of the group represent
significant figures. The resistance value designations are shown in
Tables II and III. Minimum and maximum resistance values for each
style shall be as specified (see 3.1).

Unequal Resistors – When the resistance value within the network
varies, then four digits should be used with the first digit being
an "A," and the following three digits a code number indicating a
resistance combination described in the applicable detail article
sheet.

Additional information