Ohmite Mfg. Co. 1600 Golf Rd., Suite 850, Rolling Meadows, IL 60008 • Tel. 1-866-9-OHMITE • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com5
FEATURES
• Tolerance 1%-5% standard
• Eleven wattage ratings
• Six package sizes
• Two mounting designs to
accommodate your soldering
process
• Five power resistor
technologies to optimize your
operating performance:
1. Carbon and Ceramic composi-
tion for high inrush current,
low inductance
2. Metal film for high ohmic value
and low T.C.
3. Wirewound for inrush current
combined with low ohmic val-
ues, down to 0.005and
close toleance for low T-C, low
ohm values, high inrush or
tight tolerance
4. Power film for high ohmic
value and high wattage
5. Thick film for high voltage
applications
• Flexible J-bend terminations
Surface Mount Power Resistors
RC Series: carbon/ceramic composition
RF Series: metal film
RW Series: wirewound
RP Series: power film
RM Series: thick film
PERFORMANCE SPECIFICATIONS
Power Maximum Resistance range Temp. Coefficient Dielectric Tape Size Quantity
Part Number* (watts)* voltage 1% tol. 5% tol. 0.1–11–1010+ Withstanding 13" reels per reel
RC0S2CA––––– 0.25 250 2.2–5.6M ±400 ±400 1000V 16mm 1500
RC0R5DB––––– 0.50 350 2.2–20M ±400 ±400 1000V 24mm 1000
RF0S8BA––––– 0.8 200 1–5M 0.3–10M ±100 ±100 1000V 12mm 2000
RW1S0BA––––– 1.0 50 0.005–1K 0.005–1K ±90 ±50 ±20 1000V 12mm 2000
RF1S0CA––––– 1.0 350 10–1M 1–10M ±200 ±100 1000V 16mm 1500
RC1R0EA––––– 1.0 500 3.3-100K(10% tol only) -1300 1000V 32mm 750
RP1S3CA––––– 1.25 350 1–1M ±250 ±250 1000V 16mm 1500
RP1S5CA––––– 1.5 75 0.005–1.5K 0.005–1.5K ±90 ±250 ±250 1000V 16mm 1500
RP1S5CB––––– 1.5 350 1–1M ±250 ±250 1000V 16mm 1000
RP1R5CB–––––
RW2S0CB––––– 2.0 100 0.005–5K 0.005–5K ±90 ±50 ±20 1000V 16mm 1000
RW2R0CB–––––
RP2S0DA––––– 2.0 500 1–1M ±250 ±250 1000V 24mm 1000
RP2R0DA–––––
RW2S0DA––––– 2.0 100 0.005–5K 0.005–5K ±90 ±50 ±20 1000V 24mm 1000
RW2R0DA–––––
RP2R5DB––––– 2.5 500 1–1M ±250 ±250 1000V 24mm 1000
RW3R0DB––––– 3.0 200 0.005–13K 0.005–13K ±90 ±50 ±20 1000V 24mm 1000
RP3R0EA––––– 3.0 750 1–1M ±250 ±250 1000V 32mm 750
RW3R5EA––––– 3.5 350 0.005–25K 0.005–25K ±90 ±50 ±20 1000V 32mm 750
RM0R7EA––––– 0.75 2500 1K–1000M 1K–1000M ±50 1000V 32mm 750
* At 25°C ambient
Flexible
J-bend
Standard
pedestal mount Recessed-base
mount
Dimensions (in. /
mm
)
Series Wattage Ohms Length Height Width Voltage
RC0S2CA 0.25 2.2–5.6M 0.394 /
10.01
0.159 /
4.04
0.159 /
4.04
250
RC0R5DB 0.50 2.2–20M 0.655 /
16.64
0.226 /
5.74
0.273 /
6.93
350
RM0R7EA 0.75 1K-900M 0.811 /
20.60
0.273 /
6.93
0.273 /
6.93
2500
RF0S8BA 0.80 0.30–10M 0.246 /
6.25
0.136 /
3.45
0.136 /
3.45
200
RW1S0BA 1.00 0.005–1K 0.246 /
6.25
0.136 /
3.45
0.136 /
3.45
50
RF1S0CA 1.00 1.0–10M 0.394 /
10.01
0.159 /
4.04
0.159 /
4.04
350
RC1R0EA 1.00 3.3–100K 0.811 /
20.60
0.273 /
6.93
0.273 /
6.93
500
RP1S3CA 1.25 1.0–1M 0.394 /
10.01
0.159 /
4.04
0.159 /
4.04
350
RW1S5CA 1.50 0.005–1.5K 0.394 /
10.01
0.159 /
4.04
0.159 /
4.04
75
RP1S5CB 1.50 1.0–1M 0.407 /
10.34
0.222 /
5.64
0.226 /
5.74
350
RP1R5CB 1.50 1.0–1M 0.407 /
10.34
0.222 /
5.64
0.226 /
5.74
350
RW2S0CB 2.00 0.005–5K 0.407 /
10.34
0.222 /
5.64
0.226 /
5.74
100
RW2R0CB 2.00 0.005–5K 0.407 /
10.34
0.222 /
5.64
0.226 /
5.74
100
RP2S0DA 2.00 1.0–1M 0.455 /
11.56
0.226 /
5.74
0.24 /
6.10
500
RP2R0DA 2.00 1.0–1M 0.455 /
11.56
0.226 /
5.74
0.24 /
6.10
500
RW2S0DA 2.00 0.005–5K 0.455 /
11.56
0.226 /
5.74
0.24 /
6.10
100
RW2R0DA 2.00 0.005–5K 0.455 /
11.56
0.226 /
5.74
0.24 /
6.10
100
RP2R5DB 2.50 1.0–1M 0.625 /
15.88
0.226 /
5.74
0.273 /
6.93
500
RW3R0DB 3.00 0.005–13K 0.625 /
15.88
0.226 /
5.74
0.273 /
6.93
200
RP3R0EA 3.00 1.0–1M 0.811 /
20.60
0.273 /
6.93
0.273 /
6.93
750
RW3R5EA 3.50 0.005–25K 0.811 /
20.60
0.273 /
6.93
0.273 /
6.93
350
MILITARY GRADE VERSIONS AVAILABLE: CONSULT FACTORY
0.02
500
400
300
200
100
Ohms
0.04 0.06 0.08 0.10
Typical TCR for
less than 0.1 SMD
resistors (PPM/°C)
5
6Ohmite Mfg. Co. 1600 Golf Rd., Suite 850, Rolling Meadows, IL 60008 • Tel. 1-866-9-OHMITE • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
Package Outline Dimensions PC Board Land Pattern
Packages A B C D G I J L M N O P
BA (in.) .246±.020 .136±.005 .133 REF .110±.010 .047 Nom. .054±.010 .136±.005 .150 .346 .098 .126 .050
(mm) 6.248±.508 3.454±.127 3.378 REF 2.794±.254 1.194 Nom. 1.372±.254 3.454±.127 3.81 8.79 2.49 3.20 1.27
CA (in.) .394±.020 .159±.005 .156 REF .220±.010 .062 Nom. .078±.010 .159±.005 .256 .524 .134 .126 .060
(mm) 10.008±.508 4.039±.127 3.962 REF 5.588±.254 1.575 Nom. 1.981±.254 4.038±.127 6.50 13.31 3.40 3.20 1.52
CB (in.) .407±.020 .226±.005 .222 REF .260±.010 .062 Nom. .084±.013 .222±.005 .276 .537 .131 .126 .093
(mm) 10.338±.508 5.74±.127 5.639 REF 6.604±.254 1.575 Nom. 2.134±.330 5.639±.127 7.01 13.64 3.33 3.20 2.36
DA (in.) .455±.020 .240±.005 .236 REF .260±.010 .062 Nom. .143±.012 .226±.005 .317 .585 .134 .155 .093
(mm) 11.557±.508 6.096±.127 5.994 REF 6.604±.254 1.575 Nom. 3.632±.305 5.740±.127 8.05 14.86 3.40 3.94 2.36
DB (in.) .625±.020 .273±.005 .268 REF .417±.010 .062 Nom. .143±.012 .226±.005 .474 .742 .134 .155 .093
(mm) 15.875±.508 6.934±.127 6.807 REF 10.592±.254 1.575 Nom. 3.632±.305 5.740±.127 12.040 18.85 3.40 3.94 2.36
EA (in.) .811±.020 .273±.005 .268 REF .572±.010 .093 Nom. .143±.012 .273±.005 .611 1.000 .195 .155 .093
(mm) 20.599±.508 6.934±.127 6.807 REF 14.529±.254 2.362 Nom. 3.632±.305 6.934±.127 15.52 25.4 4.95 3.94 2.36
J
I
C
B
K=0.006 ±.005
D
A
E
GH
Note 1 F=0.005 ±.001
Note 2
L
O
M
P
N
Recommended
for glue dot
application
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.
* For units where four (4) terminal Kelvin connections are required.
Temp. cycle Load Life Immersion
(-55°C to 125°C, (1000 hours (260°C for Momentary
Construction 1000 cycles) at 25°C) 10 sec.) Overload
RC Carbon/Ceramic Composition ±4.0%+.05±10.0%+.05±3.0%+.056.3xrated power for 5 sec.
RF Metal Film ±0.5%+.05±.5%+.05±0.1%+.052xrated power for 0.1 sec.
RW Wirewound ±0.5%+.05±3.0%+.05±0.1%+.055xrated power for 5 sec.
RP Power Film ±3.0%+.05±5.0%+.05±0.5%+.052xrated power for 0.1 sec.
ALL models: Leaching (260°C Solder immersion, 60 sec.)....................... No visible leaching
Thermal Shock (Units at -55°C, then rated power applied).. No mechanical damage
Flammability......................................................................... UL Material rating, UL94V0
Size A nom. B C max. Resistor count
12mm 13" 0.488 +0.078, –0.00 /
12.4 +2.0, –0.0
0.724 /
18.4
2000 pcs. BA
16mm 13" 0.646 +0.078, –0.00 /
16.4 +2.0, –0.0
0.882 /
22.4
1500 pcs. CA or 1000 pcs. CB
24mm 13" 0.961 +0.078, –0.00 /
24.4 +2.0, –0.0
1.196 /
30.4
1000 pcs. DA or DB
32mm 13" 1.276 +0.078, –0.00 /
32.4 +2.0, –0.0
1.52 /
38.4
750 pcs. EA
REEL DIMENSIONS
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).
A
0.795*
20.2
min.
0.512 ±.008
13.0
±
.200
C
B
1.973
50
min.
0.059*
1.5
min.
Full
Radius
Tape Start Slot
Measured
at Hub
0.098 /
2.5
min. width
0.394 /
10
min. depth
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
Engineering data available upon request.
100% 200% 300%
200
180
160
140
120
100
80
60
40
20
Temperature rise
Rated power
Alumina
Solder joint
FR4
Package limit hot spot temperature rise
EXTENSIVE ENVIRONMENTAL TESTS ENSURE OHMITE PERFORMANCE
6
Ohmite Mfg. Co. 1600 Golf Rd., Suite 850, Rolling Meadows, IL 60008 • Tel. 1-866-9-OHMITE • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com7
RW1S0BA–––
RW1S5CA–––
RW2S0CB–––
RW2R0CB–––
RW2S0DA–––
RW2R0DA–––
RW3R0DB–––
RW3R5EA–––
BA CA CB CB DA DA DB EA
SSSRSRRR
1.0 1.5 2.0 2.0 2.0 2.0 3.0 3.5
Wirewound
1.00 –––1R00F/JJJ JJ
2.00 –––2R00
2.20 –––2R20
3.01 –––3R01
4.99 –––4R99
5.60 –––5R60J
6.80 –––6R80
7.50 –––7R50J
10.00 –––10R0JJ J
11.00 –––11R0
15.00 –––15R0JJ
20.00 –––20R0J
24.90 –––24R9
47.00 –––47R0JJ
49.90 –––49R9
50.00 –––50R0J
51.00 –––51R0J
51.10 –––51R1
68.00 –––68R0
82.00 –––82R0J
100.00 –––100RJ
120.00 –––120RJ
158.00 –––158R
180.00 –––180RJ
182.00 –––182R
200.00 –––200R
300.00 –––300RJ
392.00 –––392R
470.00 –––470RJ
499.00 –––499R
511.00 –––511R
1K –––1K00J
1.82K –––1K82
2K –––2K00
4.7K –––4K70J
4.99K –––4K99
5K –––5K00J
10K –––10K0
49.9K –––49K9
100K –––100K
360K –––360K
499K –––499K
1M –––1M00
5M –––5M00
0.005 –––R005J J F/J
0.010 –––R010F/J J J F J J J
0.015 –––R015F/J J
0.020 –––R020JJFJJ
0.025 –––R025J
0.027 –––R027J
0.030 –––R030FJJ J
0.033 –––R033J
0.036 –––R036J
0.050 –––R050F/J J J F J J
0.056 –––R056J
0.075 –––R075J
0.080 –––R080JJ
0.100 –––R100F/J J J F J J J
0.150 –––R150JJJ
0.200 –––R200JJ J
0.220 –––R220J
0.240 –––R240JJ
0.300 –––R300JJ
0.330 –––R330J
0.400 –––R040J
0.400 –––R400J
0.470 –––R470JJ J
0.500 –––R500JJJJ
0.750 –––R750J
RW1S0BA–––
RW1S5CA–––
RW2S0CB–––
RW2R0CB–––
RW2S0DA–––
RW2R0DA–––
RW3R0DB–––
RW3R5EA–––
Ohmic value
Part No.
Prefix
Suffix Tolerance suffix: F = 1% J = 5%
Package style
Base: standard
or recessed
Wattage
STOCK VALUES AVAILABLE
BA CA CB CB DA DA DB EA
SSSRSRRR
1.0 1.5 2.0 2.0 2.0 2.0 3.0 3.5
Wirewound
Ohmic value
Part No.
Prefix
Suffix Tolerance suffix: F = 1% J = 5%
Package style
Base: standard
or recessed
Wattage
(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.)
ORDERING INFORMATION
General Notes
Other ratings under development.
Molding material rated at 205°C continuous.
Ohmite reserves the right to make changes
in product specifications and availability without
notice or liability.
The information in this brochure is based on
data obtained by our own research and is con-
sidered accurate. However, no warranty is
expressed or implied regarding the accuracy of
those data, the results to be obtained from the
use thereof, or that any such use will infringe on
any patent. This information is furnished upon
the condition that the person receiving it shall
make their own tests to determine the suitability
thereof for their particular purpose.
RW3R5EA1K00FT
Component type
R = resistor
Component
Modifier
C = carbon/ceramic
composition
F = film
P = power film
W = wire
M = thick film
Wattage
Examples:
1S3 = 1.25W
2S0 or 2R0 = 2.0W
3R5 = 3.5W
Type of Base
S = standard
R = recessed
Package
B = 12mm
C = 16mm
D = 24mm
E = 32mm
Package Modifier
A, B sequential
Resistance Value
R = Decimal
K = 1,000
M = 1,000,000
Tolerance
B = .1%
D = .5%
F = 1%
G = 2%
H = 3%
J = 5%
Examples:
R249 = 0.249 ohms
24R9 = 24.9 ohms
2K49 = 2,490 ohms
249K = 249,000 ohms
2M49 = 2,490,000 ohms
T = Tape
and Reel
(optional)
7