WireWoUND
SUrFaCe moUNT
RW Series
Ohmite has used its thermal management expertise
to produce a unique resistor design. The resistor
body incorporates fins identical to a heatsink. These
fins, as with a heatsink, increase the surface area of
the part and allow for greater power dissipation. This
unique design allows a small footprint for the SMD
device and a high power dissipation. These 5 and 7
watt resistors are extremely stable with a load life
drift of only 1%. A special flat has been designed in
to the part for pick and place operations.
F e at u R e S
• Finned design facilitates cooling
• High Power Density
• Wide Resistance Range
• Tight Tolerance
• Low TCR
chaRacteRiSticS
RW5S0
Power
5 watts
Resistance range
0.1Ω ~ 50K
Non-inductive range
0.1Ω ~ 12.5K
Tolerance
Temperature Coefficient
RW7S0
7 watts
0.1Ω ~ 100K
0.1Ω ~ 20K
Derating
100
Percent Rated Power
80
60
40
20
0
0
25
50
75 100 125
Ambient Temperature,
°C
150
0.5%, 1%, 5%
0.1Ω ~ 0.99Ω: ±90ppm
1Ω ~ 10Ω: ±50ppm
10Ω+: ±20ppm
-55°C ~ +155°C
(PxR)
1/2
11.34g
Operating temp. range
Max. working voltage
Weight
5.67g
P e R F o R m a n c e D ata
Temp. cycle
(-55°C to 125°C, 1000 cycles)
Load Life
(1000 hours at 25°C)
Immersion
(260°C for 10 sec.)
Leaching
(260°C Solder immersion, 60 sec.)
Thermal Shock
(Units at -55°C, then rated power applied)
Flammability
UL Material rating
±0.5%+.05Ω
±1.0%+.05Ω
±0.1%+.05Ω
No visible leaching
No mechanical damage
UL94V0
CommerCial
REV 4598
High Power SMD Wirewound Resistors
5 and 7 watt
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
WireWoUND
SUrFaCe moUNT
RW Series
±0.020 in. / ±0.51 mm
Overall Dimensions
Length
RW5S0
RW7S0
0.806 / 20.47
1.128 / 28.65
Width
0.365 / 9.27
0.471 / 11.96
Height
0.406 / 10.31
0.51 / 12.95
DimenSionS
Tape and Reel
FA (5W)
Reel Hub Diameter
Reel Outer Diameter
Reel Width
Tape Width
77mm
560mm
46mm
44mm
20mm
FB (7W)
77mm
560mm
46mm
44mm
24mm
Land Pattern
L
5W (FA)
7W (FB)
0.600 / 15.24
0.890 / 22.61
M
1.000 / 25.40
1.330 / 29.59
N
0.200 / 5.08
0.220 / 5.59
O
0.450 / 11.43
0.520 / 13.21
Pitch
N
M
L
O
Power Rating and Temperature Rise
data based on the recommended
Land Patterns using 10 oz. copper
PCB. FR-4 material. 0.062" thick. 4
layer.
o R D e R i n g i n F o R m at i o n
Package
FA = 5W
FB = 7W
Package Modifier
A, B sequential
Tolerance
D = 0.50%
F = 1%
J = 5%
Standard part numbers For RW Series
T = Tape
and Reel
(optional)
5W=300/reel
7W=250/reel
Component type
R = resistor
Type of Base
S = standard
Resistance
0.10
1.0
10
20
47
100
470
1000
4700
10,000
Tolerance
1%
1%
5%
5%
5%
5%
5%
5%
5%
5%
Part Number
RW5S0FAR100FE
RW5S0FA1R00FE
RW5S0FA10R0JE
RW5S0FA20R0JE
RW5S0FA47R0JE
RW5S0FA100RJE
RW5S0FA470RJE
RW5S0FA1K00JE
RW5S0FA4K70JE
RW5S0FA10K0JE
RW5S0FA1K00FET
Component Modifier
W = wirewound
Wattage
5S0 = 5w
7S0 = 7w
E = RoHS compliant
Resistance Value
R = Decimal Examples:
K = 1,000
R249 = 0.249 ohms
M = 1,000,000 24R9 = 24.9 ohms
2K49 = 2,490 ohms
CommerCial
REV 4598
High Power SMD Wirewound Resistors
5 and 7 watt
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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