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WIREWOUND
SURFACE MOUNT
Surface Mount Power
200
180
160
140
120
100
80
60
40
20
Package limit hot spot temperature rise
Alumina
FR4
Solder joint
100% 200% 300%
The temperature rise graph
data was obtained by a
selection of test substrate
size and trace width for
each resistor size to limit
operating temperatures to
safe values.
The operating temperature
safe rises are either 100°C
substrate temperature rise
or 180°C package hot spot
temperature rise at 25°C
ambient.
FR4: 0.062 in. thick; 0.062
in. traces
Alumina: 0.040 in. thick;
0.010 in. traces
Molding material rated at
205°C continuous.
Percent Rated power
DIMENSIONS
(in./mm)
A
B
N
M
L
P
E
Note 2
J
K =0.006 Ref.
O
G
Note 1
D
H
F =0.005 ± .001
I
C
Recommended
for glue dot
application
Package Outline Dimensions
PC Board Land Pattern
Packages
A
B
C
D
G
I
J
L
M
N O P
BA
CA
CB
DA
DB
EA
BB
(in.)
(mm)
(in.)
(mm)
(in.)
(mm)
(in.)
(mm)
(in.)
(mm)
(in.)
(mm)
(in.)
(mm)
.246±.020
6.248±.508
.394±.020
10.008±.508
.407±.020
10.338±.508
.455±.020
11.557±.508
.625±.020
15.875±.508
.811±.020
20.599±.508
.202±.010
5.140±.508
.136±.005
3.454±.127
.159±.005
4.039±.127
.226±.005
5.74±.127
.240±.005
6.096±.127
.273±.005
6.934±.127
.273±.005
6.934±.127
.10±.010
2.54±.127
.133 REF .110±.010 .047 Nom.
3.378 REF 2.794±.254 1.194 Nom.
.156 REF .220±.010 .062 Nom.
3.962 REF 5.588±.254 1.575 Nom.
.222 REF .260±.010 .062 Nom.
5.639 REF 6.604±.254 1.575 Nom.
.236 REF .260±.010 .062 Nom.
5.994 REF 6.604±.254 1.575 Nom.
.268 REF .417±.010 .062 Nom.
6.807 REF 10.592±.254 1.575 Nom.
.268 REF .572±.010 .093 Nom.
6.807 REF 14.529±.254 2.362 Nom.
.095 REF .079±.010 .050 Nom.
2.41 REF 2.00±.254 1.280 Nom.
.054±.012
1.372±.305
.078±.012
1.981±.305
.084±.012
2.134±.305
.143±.012
3.632±.305
.143±.012
3.632±.305
.143±.012
3.632±.305
.065±.012
1.640±.305
.136±.005
3.454±.127
.159±.005
4.038±.127
.222±.005
5.639±.127
.226±.005
5.740±.127
.226±.005
5.740±.127
.273±.005
6.934±.127
.135±.005
3.420±.127
.150
3.81
.256
6.50
.276
7.01
.317
8.05
.474
12.040
.611
15.52
0.078
1.98
.346
8.79
.524
13.31
.537
13.64
.585
14.86
.742
18.85
1.000
25.4
0.328
8.33
.098 .126 .050
2.49 3.20 1.27
.134 .126 .060
3.40 3.20 1.52
.131 .126 .093
3.33 3.20 2.36
.134 .155 .093
3.40 3.94 2.36
.134 .155 .093
3.40 3.94 2.36
.195 .155 .093
4.95 3.94 2.36
0.125 0.126 0.026
3.18 3.20 0.66
Note 1: Packages BA and CA are only available with a pedestal base. Packages CB and DA are available in either pedestal or recessed base. Packages DB and EA
are only available in a recessed base.
Note 2: Test point is .020 above PCB.
Note 3: Tape and reel dimensions per EIA 481 A except “EA” size which is 12 mm component pitch versus 16mm pitch.
Reel Dimensions
Land pattern dimensions are for reference only
A
0.795*
20.2 min.
0.059*
1.5 min.
0.512 ± .008
13.0 ± .200
C
1.973
50 min.
Size A nom. B
12mm 13” 0.488" +0.078, –0.00
12.4mm +2.0, –0.0
16mm 13” 0.646" +0.078, –0.00
16.4mm +2.0, –0.0
24mm 13” 0.961" +0.078, –0.00
24.4mm +2.0, –0.0
32mm 13” 1.276" +0.078, –0.00
C max.
0.724"
18.4mm
0.882"
22.4mm
1.196"
30.4mm
1.52"
Quantity
2000 pcs. BA or
2500 pcs. BB
1500 pcs. CA or
1000 pcs. CB
1000 pcs. DA or DB
750 pcs. EA
Full
Radius
Tape Start Slot
0.098 / 2.5 min. width
B
Measured
at Hub
32.4mm +2.0, –0.0 38.4mm
All reels are compatible with major pick-and-place machines
and made in accordance with EIA 481 A (except EA size,
which is 12mm component pitch versus 16mm pitch).
0.394 / 10 min. depth
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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