RES-RW Datasheet, PDF (1/2 Pages) Ohmite Mfg. Co. – Wide Resistance Range

RW Series
High Power SMD Wirewound Resistors
5 and 7 watt
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
Power at 25°C
at 70°C
Resistance range
Non-inductive range
Tolerance
Temperature Coefficient
Operating temp. range
Max. working voltage
Weight
Characteristics
RW5S0
RW7S0
Derating
7 watts
10 watts
100
5 watts
7 watts
0.1Ω ~ 50K
0.1Ω ~ 100K
80
0.1Ω ~ 12.5K
0.1Ω ~ 20K
60
0.5%, 1%, 5%
40
0.1Ω ~ 0.99Ω: ±90ppm
20
1Ω ~ 10Ω: ±50ppm
0
10Ω+: ±20ppm
0
-55°C ~ +155°C
(PxR)^1/2
5.67g
11.34g
70
25 50 75 100 125 150
Ambient Temperature, oC
P e rf 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
36
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax [phone] • www.ohmite.com • [e-mail]
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