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93
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
Carton size (m
3
) 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)
455mm ±5
52.4mm
+1.6
-1.4
6mm ±.5
5.08mm ±.38
0.5mm max.
L
1
L
2
L
1
– L
2
= 1mm max.
1mm max.
3.2mm min.
280mm
(ref.)
260mm
±5
60.4mm±1
14.5mm ±.5
3mm
75mm ±5
60.4mm ±1
OD/OF Series
Little Demon
®
Carbon Composition Molded
5% & 10% Tolerance
PACKAGING
RESISTOR USE GUIDELINES
BAKE PROCEDURE
ORDERING INFORMATION
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
OD683JE-TR
Series
OD
OF
Tolerance
<100KΩ : J = 5%
>100KΩ : K = 10%
Ohms
68G = 6.8
680 = 68
681 = 680
682 = 6,800
683 = 68,000
684 = 680,000
RoHS compliant
Packaging
None = cut reel, 100/bag (std.)
-TR = taped and reeled
-A = ammo pack
-B = bulk (loose)
rev 6/18-1
