MIL-R-26-2 Resistor, Fixed, Wirewound Power Type, Styles Rw20, Rw21, Rw22, Rw23, And Rw24This specification covers the associated requirements for styles RW20, RW21, RW22, RW23, and RW24, wirewound inductive resistors.

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MIL-R-26/20

2.3  Order of precedence.  In the event of a conflict between the text of this document and the references cited herein, 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  General.  The requirements for acquiring the product described herein shall consist of this document and MIL-PRF-26.

3.2  Interface and physical dimension.  Resistors shall meet the interface and physical dimensions specified on figure 1 and herein.

3.3  Power rating.  The power rating shall be as specified in table II, based on full load operation at an ambient temperature of 25OC.

3.4  Resistance.  The minimum and maximum nominal resistance values shall be as specified in table

III.

3.4.1  Standard resistance values.  For standard resistance values see MIL-PRF-26.

3.5  Resistance tolerance.  These resistors have a resistance range of 0.10 ohm to 75,000 ohms with the following resistance tolerances:

a.    Resistors of less than 1 ohm in resistance value shall have a tolerance of ±10 percent of the nominal resistance value.  If center-tapped, the resistance tolerance between tap and terminal shall be ±10 percent.

b.    Resistors of 1 ohm and over in resistance value shall have a tolerance of ±5 percent of the nominal resistance value.  If center-tapped, the resistance tolerance between tap and terminal shall be ±10 percent.

TABLE II.  Power rating.

1/  The power rating of center-tapped resistors

shall be 90 percent of those shown.

3.6  Thermal shock.  The resistors shall not change in resistance in excess of ±(2 percent +0.05 ohm).

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