Features
• Tolerance 1%, 5%, 10%,
depending on construction
• Twelve wattage ratings
• Seven package sizes
• Two mounting designs to
accommodate your soldering
process
• Five power resistor
technologies to optimize your
operating performance:
1. Carbon and Ceramic compo-
sition for surge and low induc-
tance
2. Metal film for high ohmic value
and low T.C.
3. Wire element for inrush cur-
rent combined with low ohmic
values. Resistance values as
low as 0.005Ω
4. Power film for high ohmic
value and high wattage
5. High Voltage thick film for high
voltage applications
• Flexible J-bend terminations
• Working Temperature Range:
-55°C to +150°C
Standard
pedestal mount
rC series: carbon composition (
1
/
4
&
1
/
2
watt)
rC series: ceramic composition (above
1
/
2
watt)
rF series: metal film
Recessed-base
rW series: wirewound
mount
rP series: power film
rM series: high voltage
thick film
Flexible
J-bend
Surface Mount Power
DeratiNg
100
Percent Rated Power
80
60
40
20
0
0
25
50
75 100 125
Ambient Temperature,
°C
150
series*
RC0S2CA
RC0R5DB
RW0S6BB
RF0S8BA
RW1S0BA
RF1S0CA
RC1R0EA
RP1S3CA
RW1S5CA
RP1S5CB
RP1R5CB
RW2S0CB
RW2R0CB
RP2S0DA
RP2R0DA
RW2S0DA
RW2R0DA
RP2R5DB
RW3R0DB
RP3R0EA
RW3R5EA
Wattage
0.25
0.50
0.6
0.80
1.00
1.00
1.00
1.25
1.50
1.50
1.50
2.00
2.00
2.00
2.00
2.00
2.00
2.50
3.00
3.00
3.50
Ohms
2.2–5.6M
2.2–20M
0.010-1K
1.0–10M
0.005–1K
1.0–10M
3.3–100K
1.0–1M
0.005–1.5K
1.0–1M
1.0–1M
0.005–5K
0.005–5K
1.0–1M
1.0–1M
0.005–5K
0.005–5K
1.0–1M
0.005–13K
1.0–1M
0.005–25K
Length
0.394 /
10.01
0.625 /
15.88
0.202 /
5.14
0.246 /
6.25
0.246 /
6.25
0.394 /
10.01
0.811 /
20.60
0.394 /
10.01
0.394 /
10.01
0.407 /
10.34
0.407 /
10.34
0.407 /
10.34
0.407 /
10.34
0.455 /
11.56
0.455 /
11.56
0.455 /
11.56
0.455 /
11.56
0.655 /
16.64
0.625 /
15.88
0.811 /
20.60
0.811 /
20.60
Dimensions (in. /
mm)
Height
0.159 /
4.04
0.226 /
5.74
0.135 /
3.42
0.136 /
3.45
0.136 /
3.45
0.159 /
4.04
0.273 /
6.93
0.159 /
4.04
0.159 /
4.04
0.222 /
5.64
0.222 /
5.64
0.222 /
5.64
0.222 /
5.64
0.226 /
5.74
0.226 /
5.74
0.226 /
5.74
0.226 /
5.74
0.226 /
5.74
0.226 /
5.74
0.273 /
6.93
0.273 /
6.93
Width
0.159 /
4.04
0.273 /
6.93
0.1 /
2.54
0.136 /
3.45
0.136 /
3.45
0.159 /
4.04
0.273 /
6.93
0.159 /
4.04
0.159 /
4.04
0.226 /
5.74
0.226 /
5.74
0.226 /
5.74
0.226 /
5.74
0.24 /
6.10
0.24 /
6.10
0.24 /
6.10
0.24 /
6.10
0.273 /
6.93
0.273 /
6.93
0.273 /
6.93
0.273 /
6.93
Voltage
250
350
50
200
50
350
500
350
75
350
350
100
100
500
500
100
100
500
200
750
350
Military grade versions available; contact Ohmite.
*Last two digits designate package size
P e r f o r m a n c e S P e c i f i c at i o n S
Part Number
RC0S2CA–––––
RC0R5DB–––––
RW0S6BB–––––
RF0S8BA–––––
RW1S0BA–––––
RF1S0CA–––––
RC1R0EA–––––
RP1S3CA–––––
RP1S5CA–––––
RP1S5CB–––––
RP1R5CB–––––
RW2S0CB–––––
RW2R0CB–––––
RP2S0DA–––––
RP2R0DA–––––
RW2S0DA–––––
RW2R0DA–––––
RP2R5DB–––––
RW3R0DB–––––
RP3R0EA–––––
RW3R5EA–––––
RM0R7EA–––––
*25°C ambient
Power
(watts)*
0.25
0.50
0.6
0.8
1.0
1.0
1.0
1.25
1.5
1.5
2.0
2.0
2.0
2.5
3.0
3.0
3.5
0.75
Maximum
voltage
250
350
50
200
50
350
500
350
75
350
100
500
100
500
200
750
350
2500
—
0.005Ω–1.5K
—
0.005Ω–5K
—
0.005Ω–5K
—
0.005Ω–13K
—
0.005Ω–25K
1KΩ–1000M
1% tol.
—
—
0.010Ω–1K
1Ω–5M
0.005Ω–1K
10Ω–1M
resistance range
5% tol.
—
—
0.005Ω–1K
—
0.005Ω–1K
1Ω–10M
3.3-100K(10% tol only)
1Ω–1M
0.005Ω–1.5K
1Ω–1M
0.005Ω–5K
1Ω–1M
0.005Ω–5K
1Ω–1M
0.005Ω–13K
1Ω–1M
0.005Ω–25K
1KΩ–1000M
—
±90
—
±90
—
±90
—
±90
—
±90
—
±250
±250
±250
±50
±250
±50
±250
±50
±250
±50
—
10% tol.
2.2Ω–5.6M
2.2Ω–20M
temp. Coefficient
0.1Ω–1Ω 1Ω–10Ω
10Ω+
—
—
±90
—
±90
—
±400
±400
±50
±100
±50
±200
±400
±400
±20
±100
±20
±100
-1300
±250
±250
±250
±20
±250
±20
±250
±20
±250
±20
±50
Dielectric
Withstanding
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
1000V
tape size
13” reels
16mm
24mm
12mm
12mm
12mm
16mm
32mm
16mm
16mm
16mm
16mm
24mm
24mm
24mm
24mm
32mm
32mm
32mm
Quantity
per reel
1500
1000
2500
2000
2000
1500
750
1500
1500
1000
1000
1000
1000
1000
1000
750
750
750
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
Ohmite Mfg. Co.
13
Surface Mount Power
(continued)
A
B
M
L
N
P
E
J
Note 2
K
=0.006 Ref.
O
G
Note 1
H
D
F
=0.005
±.001
I
C
Recommended
for glue dot
application
PC Board Land Pattern
N
O
P
.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
Packages
Ba
(in.)
(mm)
Ca
(in.)
(mm)
CB
(in.)
(mm)
Da
(in.)
(mm)
DB
(in.)
(mm)
ea
(in.)
(mm)
BB
(in.)
(mm)
a
.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
B
.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
Package Outline Dimensions
C
D
g
.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.
i
.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
J
.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
L
.150
3.81
.256
6.50
.276
7.01
.317
8.05
.474
12.040
.611
15.52
0.078
1.98
M
.346
8.79
.524
13.31
.537
13.64
.585
14.86
.742
18.85
1.000
25.4
0.328
8.33
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.
Land pattern dimensions are for reference only
200
180
160
Temperature rise,
°C
140
120
100
80
60
40
20
Package limit hot spot temperature rise
Alumina
FR4
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 continu-
ous.
500
400
300
200
100
0.02 0.04 0.06 0.08 0.10
Ohms
Typical TCR for
less than 0.1Ω SMD
resistors (PPM/°C)
Solder joint
100%
200%
Percent Rated power
300%
reel DimenSionS
0.795*
20.2
min.
0.512
±.008
13.0
±
.200
C
0.059*
1.5
min.
A
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
1.973
50
min.
32mm 13” 1.276" +0.078, –0.00
32.4mm +2.0, –0.0
B
C max.
0.724"
18.4mm
0.882"
22.4mm
1.196"
30.4mm
1.52"
38.4mm
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
0.394 /
10
min. depth
Measured
at Hub
All reels are compatible with major pick-and-place machines and made
in accordance with EIA 481 A (except EA size, which is 12mm compo-
nent pitch versus 16mm pitch).
(continued)
14
Ohmite Mfg. Co.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
Surface Mount Power
(continued)
P e r f o r m a n c e D ata
Temp. cycle
(-55°C to 125°C,
Construction
1000 cycles)
Carbon/Ceramic Composition
±4.0%+.05Ω
Metal Film
±0.5%+.05Ω
Wirewound
±0.5%+.05Ω
Power Film
±3.0%+.05Ω
Wirewound, Non-inductive
±0.5%+.05Ω
Load Life
(1000 hours
at 25°C)
±10.0%+.05Ω
±0.5%+.05Ω
±3.0%+.05Ω
±5.0%+.05Ω
±3.0%+.05Ω
Immersion
(260°C for
10 sec.)
±3.0%+.05Ω
±0.1%+.05Ω
±0.1%+.05Ω
±0.5%+.05Ω
±0.1%+.05Ω
Momentary
Overload
6.3x rated power for 5 sec.
2x rated power for 0.1 sec.
5x rated power for 5 sec.
2x rated power for 0.1 sec.
5x rated power for 5 sec.
RC
RF
RW
RP
RN
ALL models:
Leaching
(260°C Solder immersion, 60 sec.).......................
Thermal Shock
(Units at -55°C, then rated power applied)..
Flammability
.........................................................................
No visible leaching
No mechanical damage
UL Material rating, UL94V0
S ta n D a r D Pa rt n u m b e r S f o r S u r fa c e m o u n t P o w e r r e S i S t o r S
Wirewound
Package style
Ba
Base: standard
or recessed
s
Wattage
1.0
RW1S0BA–––
Ohmic value
Part No.
Prefix
Ca
s
1.5
RW1S5CA–––
CB
s
2.0
RW2S0CB–––
CB
r
2.0
RW2R0CB–––
Da
s
2.0
RW2S0DA–––
Da
r
2.0
RW2R0DA–––
DB
r
3.0
RW3R0DB–––
ea
r
3.5
RW3R5EA–––
BB
s
0.6
RW0S6BB–––
ea
r
1.0
RC1R0EA–––
Ohmic value
Package style
Base: standard
or recessed
Wattage
Part No.
Prefix
Ba
s
1.0
RW1S0BA–––
Ca
s
1.5
RW1S5CA–––
Wirewound
CB
s
2.0
RW2S0CB–––
CB
r
2.0
RW2R0CB–––
Da
s
2.0
RW2S0DA–––
Da
r
2.0
RW2R0DA–––
DB
r
3.0
RW3R0DB–––
ea
r
3.5
RW3R5EA–––
BB
s
0.6
RW0S6BB–––
F
K
J
F
F
F
F
F
F
F
F
K
K
K
K
K
F
ea
r
1.0
RC1R0EA–––
K
K
K
K
K
J
0.005
0.010
0.015
0.020
0.025
0.027
0.030
0.033
0.036
0.050
0.056
0.075
0.080
0.100
0.150
0.200
0.220
0.240
0.300
0.330
0.400
0.400
0.470
0.500
0.750
1.00
2.00
Suffix
Tolerance suffix: F = 1% J = 5% K=10%
–––R005–
J
J
F/J
–––R010–
F/J
J
J
F
J
J
–––R015–
F/J
J
–––R020–
J
J
F
J
–––R025–
J
–––R027–
J
–––R030–
F
J
J
–––R033–
J
–––R036–
J
–––R050–
F/J
J
J
F
J
–––R056–
J
–––R075–
J
–––R080–
J
–––R100–
F/J
J
J
F
J
J
–––R150–
J
J
J
–––R200–
J
J
–––R220–
J
–––R240–
J
J
–––R300–
J
J
J
–––R330–
–––R040–
J
–––R400–
J
–––R470–
J
J
J
–––R500–
J
J
J
–––R750–
J
–––1R00–
F/J
J
J
J
J
–––2R00–
J
J
F
F
F
J
F
J
F
F
J
J
J
F
F
F
J
F
F
F
3.30
4.70
5.00
5.60
6.80
7.50
10.00
15.00
20.00
22.00
24.90
33.00
36.00
47.00
50.00
51.00
68.00
82.00
100.00
120.00
180.00
300.00
470.00
1K
4.7K
5K
Suffix
Tolerance suffix: F = 1% J = 5% K=10%
–––3R30–
–––4R70–
–––5R00–
–––5R60–
J
–––6R80–
–––7R50–
–––10R0–
J
J
J
–––15R0–
J
J
–––20R0–
J
–––22R0–
–––24R9–
–––33R0–
–––36R0–
–––47R0–
J
–––50R0–
–––51R0–
J
–––68R0–
–––82R0–
J
–––100R–
J
–––120R–
J
–––180R–
J
–––300R–
J
–––470R–
J
–––1K00–
J
–––4K70–
J
–––5K00–
J
J
o r D e r i n G i n f o r m at i o n
Package
B = 12mm
C = 16mm
D = 24mm
E = 32mm
Package Modifier
A, B sequential
Tolerance
F = 1%
G = 2%
H = 3%
J = 5%
K =10%
Component type
R = resistor
Type of Base
S = standard
R = recessed
½½½½½½½½½½½½½½
Component Modifier Wattage
C = carbon/ceramic
Examples:
composition
1S3 = 1.25W
F = film
2S0 or 2R0 = 2.0W
P = power film
3R5 = 3.5W
W = wire
N = wirewound, non-inductive
T = Tape
and Reel
(optional)
(For example, the part number
shown is a wirewound resistor, 3.5
watt, recessed base, 32mm tape
size, first case size [A], 1000 ohms
1% tolerance.)
E = RoHS compliant
Resistance Value
Available Jan. 2006
R = Decimal Examples:
K = 1,000
R249 = 0.249 ohms
M = 1,000,000 24R9 = 24.9 ohms
2K49 = 2,490 ohms
Ohmite Mfg. Co.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
15
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