80 sꢀꢁꢂꢀꢃ
Commercial Grade Acrasil®‚ Silicone-Ceramic
Conformal Axial Terminal Wirewound
1% Tolerance (5% available)
F e at u r e s
rW sꢀꢁꢂꢀꢃ
•ꢀDesignedꢀforꢀprecisionꢀpowerꢀapplications
•ꢀAll-weldedꢀconstruction
Military Grade 80 Series MIL-R-26 Qualified
•ꢀRWꢀSeriesꢀ“Mil”ꢀvalueꢀresistorsꢀmarkedꢀwithꢀ
“Mil”ꢀinꢀaccordanceꢀwithꢀMIL-R-26ꢀspecifica-
tions
Ohmite’s highest quality conformal axial terminal
silicone-ceramic coated resistors for applications
requiring high precision and stability. These resistors
have a low temperature coefficient and maintain a
high degree of stability under demanding conditions.
series speCiFiCations
Commercial Grade Military Grade
Watts
Ohms
0.1-6K
0.1-8K
0.1-20K
Voltage
150
100
81F
RW70U
1
2
3
82
83F
83J
85F
85J
80F
80J
RW79U
RW69V
RW74U
RW67V
RW78U
RW68V
200
5
0.1-75K
460
10
0.1-150K
1000
Non-Inductive versions available. Insert “N” before tolerance code. Example: 83NF2K21
CharaCteristiCs
Silicone-ceramic
Coating
Core
Ceramic
Solder-coated copper clad axial
Linearly from 100% @ +25°C to 0% @ +275°C.
±5% (J type), ±1% (F type) (other tolerances available)
Based on 25°C free air rating
See chart
Terminals
Derating
Tolerance
Power rating
Maximum ohmic values
Overload
Under 5 watts: 5 times rated wattage for 5 seconds. 5 watts and over: 10 times
rated wattage for 5 seconds
Under 1Ω; ±90 ppm/°C
1 to 9.99Ω: ±50 ppm/°C
10Ω and over; ±20 ppm/°C
Temperature coefficient
500 VAC: 1 watt rating; 1000 VAC: 2, 3, 5, 7, and 10 watt rating
Dielectric withstanding voltage
Dimensions
(in./mm max.)
Watts
Length
Diam.
Lead gauge
81F
82
RW70U
1
2
3
0.437 / 11.1
0.406 / 10.3
0.593 / 15.1
0.125 / 3.2
0.219 / 5.6
0.218 / 5.5
24
20
20
1.5 in. / 38.1mm
L
D
83F
83J
RW79U
RW69V
85F
85J
RW74U
RW67V
5
0.937 / 23.8
1.842 / 46.8
0.343 / 8.7
0.406 /10.3
18
18
80F
80J
RW78U
RW68V
10
(continued)
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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