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!41L-R-39008C

?&&w%nP”

MIL-R-39008B

14 June

1973

MILITARY

RESISTORS,

SPECIFICATION

(IWSULATEO),

FOR

all

Depitrt-

Oefense.

FIXED,

COMPOSITION

ESTA8LISHE0

RELIABILITY

GENERAL

SPECIFICATION

approved

the

This

ents

speclflcatfon

Agencies

for

use

Department

SCOPE

This

specification

comers

the

general

requirements

for

established

reljabfllty,

insulated,

ffxed

resfstors

having

a coapositton

resistance

element

consisting

of a mixture

of carbon,

insulating

material,

and

suitable

binders,

ither

molded

together

or applied

as a thin

layer

of conducting

material

on an

insulating

form.

Resistors

covered

by this

specification

have

failure

rates

percent

per

1,000

hours

(see

1.2.1.5)

50 percent

ran

ing

from

1.0

0.001

t.bi.fit

temperature

of 70 C (see

table

1).

These

ful?-load

operatlnm

60 percent

confidence

level

“on the

bbsis

faflure

‘iates

qre

established

Iffe

tests.

The faflure

rate,

identified

by the

appropriate

symbol,

is referred

voltage

quivalent

-to-SO

percent

to operation

rated

temperatareand

A-p4rt

per

15’perCent).

rated

watta

e (with

m permissible

resistance

change

illion

{PP i ) qualfty

system

used

for

documenting

nd reportfng

the

Bverage

Statfstlcal

outgoing

quallty

resistors

supplfed

to thfs

specfffcatlon.

anufacturing

process

control

(SPC)

techniques

are

required

in the

minimize

variation

in production

of resistors

supplied

to this

specification.

1.2

Classlficatfon.

or Identifying

form.

and as

Number

specified

’[PIN).

[see

The

3.1.

Part

6.1.

and

Identifying

6.12):

Number

1.1

Scope.

the

1.2.1

part

following

(see

112~1.1)

l%aracteristfc

(see

1.2.1.2)

resistance

“(see

1.2.1.3)

Resistance

tolerance

(see

1.2.1.4)

7 il

(~ee”1~2~i.~)

lBeneficial

lpertfnent

Iaddressed

.107703-S000

I(OO

Form

comments

(recommendations,

addftfons,

deletions)

and any

data

which

may be of use

in improving

thfs

document

should

to:

IJS Army

Laboratory

Command

ATTN:

SLCET-R-S,

Fort

Monmouth,

by using

the

self-addressed

Standardization

Document

Improvement

1426)

appearing

the

end

of thfs

document

or by letter.

AMSC N/A

DISTRIBUTION

STATEMENT

Approved

for

public

release;

distribution

FSC 5905

unlimited.

MIL-R-39008C

TABLE

Characteristic.

ambient

tempera-

lSymbollture

(100

percent

Irated

wattage

and

150 percent

rated

Iwattage

for

lMaximum

Ioperating

Resistance

temperature

characteristic

In aximum

Ireslstance

Iambfent

all

owabl

from

~e~t~!~;c~natl

temperature

of 25 C

(+)

+105”C

[ Nomfnal

resistance

Ifaflure

Ideternlnatfon.

rate

)

-55*C

11,000

Ohms

?i7W_under

10,000

Incl.1

0.1 megohm

Percent

“c

I Percent

(+)

;

I1,1OO

111,000

Ilncl

10:0

15.0

13.0

1~1

7:5

10.11%%

tncl

11.1

Incl

111.0

and

over

20.0

25.o

10.0

15.0

1.2.1.1

Style.

Is Identfffed

The

style

followed

by a two-dlglt

numbar;

the

letters

insulated,

composftlon,

fixed

resfstors,

power

r~tlng

of the

resistors.

1.2.1.2

Characterfstfc.

ccordance

wfth

tabl

The

characteristic

by the

three-letter

Identffy

established

and the

number

ldentfffes

symbol

“RCR”

rellabflfty,

the

sfngle,

sfze

lttter

identified

Reslstenct.

The nominal

resistance

value

expressed

fn ohms fs

1.2.1.3

identified

hree-iflgft

number;

the

ffrst

two dlgfts

represent

sfgnfffcant

ffgures

qnd

the

last

Qfgft

specfffes

the

number

of zeros

to follow.

When

resistance

values

less

than

10 ohms are

requfred,

the

letter

“R” fs substituted

for

one of the

sfgnfffcant

dfgfts

to represent

the

decfmal

pofnt.

When the

letter

“R” fs used,

succeeding

digfts

of the

group

represent

figures

as shown

the

following

example:

2R7

Mfnlmum

standerd

‘1O

1.2.1.4

sfngle

and maxtmum

values

for

100”

decade

values

very decade

shall

ufth

ccordance

The

table

11.

resistance

= 2.7

ohms

specfffed

sequence

(see

3.1).

demonstrated

The

fQr

shall

be as

the

MS90178.

resistance

the

Resistance

tolerance.

letter

in accordance

wfth

TABLE

tolerance

Identlfled

II.

Resistance

tolercnce.

Symbol

;

Resistance

Percent

tolerance

(*)

MIL-R-39008C

1.2.1.5

Failure

rate

table

111 is signified

failure

rate

level

for

TABLE

designation.

by a single

which

the

Faflure

rate

The

letter

resfstor

level

(at

failure

rate

P, R, S),

(M,

is qualified

percent

designation

which

identifies

(see

4.4).

rated

wattage).

shown

the

III.

Failure-rate

designation

level

Failure

percent/1,000

rate

hours

. . . . . . . . . . . I

2.1

APPLICABLE

Government

DOCUMENTS

documents.

! .. ........~

. .........

! . . . . . . . . ...!

1.0

0.1

0.01

0.001

2.1.1

Speciffc&tfons,

standards,

and handbooks.

The followlng

specfffcations,

standards,

qnd

of thi

document to the extent

specified

herein.

Unless

~~he%l~e

~~sc?f!~~,

the

is~ues

of these

documents

are

those

Index

of Specfficatlons

and

lfsted

In the

fssue

of the

Department

of Defense

Standards

(DODISS)

and supplement

thereto,

cited

fn the

solicitation

(see

6.1).

SPECIFICATION

NILITARY

HIL.R.39008/l

UIL-R-39008/2

MIL-R-39008/3

MIL-R-39008/4

M!L-R-39008/5

MIL-R-39032

STANOARDS

MILITARY

MIL-STD-202

MIL-STD-690

MIL-STD-790

MIL-STD-81O

MIL-STD-1276

MIL-STO-1285

MS90178

Resfstors.

Established

Resfstors.

Establfsh8d

‘Resistors,

Established

Resistors,

Established

Resistors,

Established

Resistors,

Insulated),

Fixed,

Composition

Reliability,

Style

RCR07 .

Insulated).

Ffxed.

Composition

Rell~bflity,

Style-RCR20.

Ffxed,

Composition

(Insulated),

Relfabflity,

Style

RCR32.

Ffxed

Composition

(Insulated),

Relfabflfty,

Style

RCR05.

Fixed,

Composition

(Insulated),

Reliability.

Style

RCR42.

Packaging

of.

‘-

nd Electrical

Test

Methods

for

Electronic

Component

Parts.

and

Procedures.

Faflure

rate

Sampling

Plans

Relfabilfty

Assurance

Program

for

Electronic

Parts

$pecfffcations.

Environmental

Test

Methods

and Engfneerfng

Gufdelfnes.

Leads

for

Electronic

Component

Parts.

Marking

of Electrical

and Electronic

Parts.

Standard

24 Value

Series

Oecade

for

Electronic

and 20-Percent

Tolerances.

Components

of S-,

10-,

copies

avaflable

Avenue,

federal

from

the

Philadelphia,

specfffcations,

Standardization

Documents

PA 19111-5094).

(Unless

otherwfse

indfcated,

standards,

and handbooks

are

Desk.

Bufldfng

4D,

700

Robbins

flftary

Order

NIL-R-39008C

2.2

Non.Government

publications.

The followfng

documen%

to ttl

extent

speclffed

herein.

Unless

of the

documents

which

are

DOD adopted

are

those

DODISS

cited

In the

solicitation.

Unless

otherwise

documents

not

lfsted

In the

DODISS

are

the

issues

solicitation

(see

6.1).

ELECTRONIC

EIA-554

EIA-557

INDUSTRIES

ASSOCIATION

(EIA]

documents

form

a part

of thfs

otherwise

speclflerl,

the

Issues

listed

In the

issue

of the

specffled,

the

Issues

of the

documents

cited

in the

Assessment

Per

Mllllon

Statistical

Outgotng

Nonconforming

(PPM)

(DOD Adopted).

Process

Control

Systems

Electronic

Levels

(DOD

Industries

Part

Adopted).

(ApplfCatfOn

Association,

fOr COpleS

2001

Eye

Street,

should

qddressed

to the

Washington

DC 20006.)

(Non-Government

standards

Organfzatlons

that

prepare

be available

fn or through

and other

publications

are

or d~strfbute

the

documents.

librarfes

or other

informational

vaflable

normally

These

documents

services.

from

also

may

2.3

Order

of prece~ence.

In the

qvent

of a conflict

document

and the

references

cited

herein

(except

for

specfficatlons,

specification

sheets,

or MS standards),

takes

precedence.

Nothfng

fn this

document,

however,

and regulations

unless

a specfffc

exemptfon

has been

REQUIREMENTS

between

the

text

of this

associated

detafl

the

text

of this

document

supersedes

applicable

laws

obtained.

3.1

Associated

detafl

speclflcatlons.

The Indfvfdual

ftem

requirements

shall

be as specfffed

pplicable

qssociated

detafl

wfth

the

herein

and In accordance

speclffcatfon.

In the

event

qny

confllct

between

the

requirements

of thfs

specfffcatlon

and the

associated

detafl

specfffcatfon,

the

latter

shall

govern.

3.2

Qualification.

Resfstors

furnfshed

under

thfs

speclffcatfon

shall

products

wnlca

ctfvity

for

lfstfng

on the

qre quthorized

by the

qualifying

applicable

qualffled

products

list

the

time

of award

of contract

(see

4.4

qnd

6.2).

In additfon,

the manufacturer

shall

obtafn

certification

from

the

qualifying

activ?ty

that

the

reliability

assurance

requirements

of 4.1.2

have

been

met and are

befng

maintained.

Authorized

distributors

that

qre

approved

MIL-STO-790

distributor

requirements

by the

qualfffed

products

lfst

(QPL)

sanufacturer

are

listed

in the

QPL.

3.3

Relfabflfty

and

quallty.

The

s~~;;;ca%%+i%e

rkqulrement~

xceptions

and

3.3.2

qnd

proc~duras

specfffed

relfabflfty

$pectffed

4.1.2,

of resistors

afntal.ed

In MIL-$TD.6~

4.4.4,

4.6.2.1.

furnfshed

and

under

with

MIL-STD-790

thfs

the

with

established

fn accordance

details

CJualfty.

3.3.2.1

Statlstlcal

Implement

and use

process

control.

The contractor

I hall

statistical

process

control

ng process

for

parts

anufacture<

techniques

fn the

covered

by thfs

specfflcatlon.

and

qaintained

The SPC program

shall

be developed

fn accordance

wfth

all

the

requirements

of EIA-557.

The SPC program

shall

documented

and nafntafned

as part

of the

overall

relfabf<

fty

assurance

program

speciffed

In HIL-STD-790.

The

implementation

of statfst’

cal

process

control

shall

be 12

qonths

from the date

of thfs

specfffcatfon.

Processes

for

oldlng

lfmfted

application

of SPC techniques

should

Include

but

are

not

operatfon

and marking.

MI L- R-39008C

levels.

3.3.2.2

Quality

The quality

of lots

that

have

been

subjected

to and

passed

the

subgroup

UO percent

screening

inspection

of the

group

A inspection

shall

be established

~nd maintained

in accordance

with

4.6.1.2.2

and EIA-554.

Individual

PPN defect

level

(I.e.,

PPM-2

and PPM-3)

and an overall

PPM defect

level

(I.e.,

PPN-5)

shall

be established

based

on the

tects

prescribed

in the

subgroup

2 tests

af the

group

A Inspections.

The defect

level

for

PPM-2

shall

less

than

100 PPM.

The implementation

of part

per

qilllon

verification

shall

12 months

from

the

date

of this

specification.

The contr~ctor

shall

notify

3.3.2.2.1

Noncompliance.

when the

100

1 evel

is reached

or exceeded

for

PPM-2.

provide

sufficient

information

to the

qualifying

activfty

of the

problea

and what

corrective

action

fs being

taken.

this

problem

shall

be the

basts

for

removal

the

affected

the

qualifying

activity

The contractor

shall

documenting

the

causes

Failure

to correct

product

from

the

QPL.

The

qaterial

shall

-be

specffied

herefn.

However,

when a

3.4

Material.

ater~el

fs not

specffied,

defintte

shall

be used

which

wi17

enable

aterfal

the

resistors

qeet

the

performance

requirements

of this

speciflcetfon.

aterial

shall

not

be construed

as a

Acceptance

or 8pproval

of any constituent

guarantee

of the

acceptance

of the

finfshed

product.

The resistors

shal?

3.5

Design

and construction.

construct

specffied

(see

imensions

on,

and physfcal

consist

of a composition

resistance

element

protected

humidity

and temperature

conditions

by an enclosure

oisture-resfstant,

Insulating

qaterial.

3.5.1

soldering.

—

Termfnals.

All

teralnals

shall

suitably

be of the

desfgn,

3.1).

Each

resfstor

against

exposure

or a coatfng

shall

treated

facillate

authorized

suppllhd

by the

3.5.1.1

Solder

dfp

(netlnnlag)

lecds.

category

butor)

solder

this

speciflc~t!on

provided

the

solder

ctlvfty.

qualifying

3.5.1.2

be based

Qualifying

on one of

activity

the

following

proval

options:

The aanufacturer’(or

(retin)

the

leads

dfp

process

has been

hfs

prodmct

approved

Approval

the

solder

dip

process

will

Uhen

the

origfnal

lead

finish

52 of RIL-STO-1276.

(NOTE:

applicable.

)

The manufacturer

retinnlng

as is used

in the

When the

lead

of NIL-STO-1276

used

for

solder

qualfffed

was hot

solder

dfp

lead

finish

The 200

qfcroinch

saxfmum

thfckness

is not

same

solder

dip

process

for

shall

use the

original

Manufacture

of the

product.

originally

qualffied

was not

hot

solder

dfp

lead

finish

prescrlbod

In Itea

pproval

for

the

process

dip

shall

be based

on the

following

test

procedure:

(1)

Thirty

saaples

qny

roslstance

value

for

etch

style

qnd

lead

flnfsh

shall

be subjected

to the

manufacturing’s

solder

dip

process.

Folleufng

the

solder

dip

process,

the

reststors

are

$ubJected

to the

dc ?eslstance

test

qnd

other

group

qre

allowed.

No defects

electrfcals).

Ten

test.

The

heat

dip

the

30 samples

No defects

are

(2)

llowed.

qre

then

subjected

the

solderabilfty

(3)

reaIafning

test

followed

of gold

plated

samples

are

subjected

to the

by the

moisture

resistance

leads

is not

allowed.)

resistance

to solder

test

(NOTE:

Solder

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