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94

Tape/Reel

OD

OF

Qty./reel

5000

3000

Reel size (mm)

260

260

Qty./carton

40,000 24,000

Gross carton wt. (kg)

12

13

0.04

0.04

Ammo Box

OD

OF

Tape width (mm)

52

52

Qty./box

2000

2000

Qty./carton

30,000 30,000

Gross carton wt. (kg)

10

16

Carton size (m3)

0.03

0.05

75mm

±5

60mm

±5 (OD)

65mm

±5 (OF)

275mm

±5 (OD)

455mm

±5 (OF)

52.4mm +1.6

-1.4

6mm

±.5

5.08mm

±.38

0.5mm max.

1mm max.

3.2mm min.

280mm

(ref.)

260mm

±5

60.4mm

±1

14.5mm

±.5

3mm

60.4mm

±1

OD/OF/OA Series

OD/OF Series (5% Tol.) OA Series (10%)

p A ck A ging

re S i S t O r u S e gui D eline S

b A ke pr O ce D ure

O r D ering in FO rm Ati O n

A. Heat Treatment

110°C±10°C

15hours

B. Frequency of

heat treatment

1timeonly

Carbon composition resistors are manufactured by extruding

a blend of carbon and organic binders inside a phenolic outer

body. The extrusion is cut to length, leads inserted, cured,

and marked to form a finished resistor. The carbon and binder

mixture is adjusted to produce different resistance values. The

resistorsaresortedfor5%,10%,and20%tolerancevalues.

Carbon composition resistors are able to withstand larger

short-term pulses and higher voltages than film resistors and

arevirtuallyimpervioustoESDevents(Electro-staticdis-

charge). Carbon composition resistors are also sensitive to

moisture and, therefore, storage recommendations should be

adhered to. Generally, any moisture absorbed during storage

will be "baked out" during the soldering operation. If the prod-

uct is stored properly the resistance shift during the soldering

operationwillbeminimal,lessthan2%or3%.

Carbon composition resistors are highly hygroscopic and

changes in resistance value can occur if too much moisture is

absorbed.Forthisreason,itisrecommendednottousewater

or water-soluble solvents to clean these components. Alcohol

or hydrocarbon solvents are recommended for rinsing.

All resistors are packaged in sealed poly bags with desiccant

to maintain a consistent humidity during storage. If parts are

removed from the protective plastic bag they should be used

as soon as possible or resealed in the plastic bag.

Storage: Ohmite recommends storing carbon composition

resistorsinacontrolledenvironmentatatemperatureof5°to

35°Candrelativehumidityoflessthan60%.Inventoryshould

always be used on a first-in-first-out basis.

D. Cautions

Solderability: may be affected due to oxidization of lead wire

Resistance value: some units may not completely recover to

original value.

Soldering heat: some treated product may have substantial

resistance change during soldering operation. It is recom-

mended that parts be tested to evaluate soldering heat

effects.

C. Solder heat test after treatment

Solder

Dip

Type

Temp.

Time

Evaluation

OD

300°C

3sec

within±3%

OF

350°C

3sec

within±3%

*DepthofImmersion:3mmfromtheresistor

body

•OD/OFSeriesavailableinE24values

•OASeriesavailableinE12values

Series

OD

OF

OA

Tolerance

OD, OF:J =5%

OA:

K = 10%

Ohms

68G =

6.8

680 =68

681 =

680

682 =

6,800

683 = 68,000

684 = 680,000

RoHS compliant

Tape & reel

optional