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OA103K View Datasheet(PDF) - Ohmite Mfg. Co.

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OA103K Datasheet PDF : 3 Pages
1 2 3
OD/OF/OA Series
Little Demon® Carbon Composition Molded
OD/OF Series (5% Tol.) OA Series (10%)
packaging
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
resistors in a controlled environment at a temperature of 5° to
35°C and relative humidity of less than 60%. Inventory should
always be used on a first-in-first-out basis.
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 (m3)
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
0.5mm max.
6mm ±.5
52.4mm
+1.6
-1.4
L1
L2
L1 – L2 = 1mm max.
5.08mm ±.38
275mm ±5 (OD)
455mm ±5 (OF)
1mm max.
60mm ±5 (OD)
65mm ±5 (OF)
3.2mm min.
75mm ±5
280mm
(ref.)
260mm
±5
14.5mm ±.5
3mm
60.4mm±1
60.4mm ±1
resistor use guidelines
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
resistors are sorted for 5%, 10%, and 20% tolerance values.
Carbon composition resistors are able to withstand larger
short-term pulses and higher voltages than film resistors and
are virtually impervious to ESD events (Electro-static dis-
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
operation will be minimal, less than 2% or 3%.
Carbon composition resistors are highly hygroscopic and
changes in resistance value can occur if too much moisture is
absorbed. For this reason, it is recommended not to use water
or water-soluble solvents to clean these components. Alcohol
or hydrocarbon solvents are recommended for rinsing.
A. Heat Treatment
110°C ±10°C
15 hours
B. Frequency of
heat treatment
1 time only
bake procedure
C. Solder heat test after treatment
D. Cautions
Solder
Type Temp.
OD 300°C
Dip
Time
3 sec
Evaluation
within ±3%
Solderability: may be affected due to oxidization of lead wire
Resistance value: some units may not completely recover to
original value.
OF
350°C
3 sec within ±3% Soldering heat: some treated product may have substantial
*Depth of Immersion: 3mm from the resistor resistance change during soldering operation. It is recom-
body
mended that parts be tested to evaluate soldering heat
effects.
• OD/OF Series available in E24 values
• OA Series available in E12 values
O R D ERING IN F O RM A TI O N
Tape & reel
RoHS compliant optional
O D 6 8 3 J E -TR
Series
Ohms Tolerance
OD 68G =
6.8 OD, OF: J = 5%
OF 680 =
68 OA: K = 10%
OA 681 = 680
682 = 6,800
683 = 68,000
684 = 680,000
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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