80 Series
FEATURES
• Designed for precision power
applications
• All-welded construction
• RW Series “Mil” value resistors
marked with “Mil” in accordance
with MIL-R-26 specifications
Commercial Grade Acrasil
®
‚ Silicone-Ceramic
Conformal Axial Terminal Wirewound
1% Tol. (5% avail.)
RW Series
1.5 /
38.1
SPECIFICATIONS
Material
Coating:
Silicone-ceramic.
Core:
Ceramic.
Terminals:
Solder-coated copper
clad axial.
Derating:
Linearly from
100% @ +25°C to
0% @ +275°C.
Military Grade 80 Series MIL-R-26 Qualified
L
D
Comm.
Grade
81F
82
83F
83J
85F
85J
80F
80J
Military
Grade Watts Ohms
RW70U
1
0.1-6K
2
0.1-8K
RW79U
3 0.1-20K
RW69V
RW74U
5 0.1-75K
RW67V
RW78U
10 0.1-150K
RW68V
Dimensions (in. /
mm)
Lead
Length
Diam.
Voltage ga.
0.437 /
11.1
0.125 /
3.2
150
24
0.406 /
10.3
0.219 /
5.6
100
20
0.593 /
15.1
0.218 /
5.5
200
20
0.937 /
23.8
0.343 /
8.7
1.842 /
46.8
0.406 /10.3
460
1000
18
18
O R D E R I N G I N F O R M AT I O N
Commercial Grade
Electrical
Tolerance:
±5% (J type),
±1% (F type)
(other tolerances available).
Power rating:
Based on 25°C free
air rating.
Maximum ohmic values:
See chart.
Overload: Under 5 watts:
5 times
rated wattage for 5 seconds. 5
watts and over: 10 times rated
wattage for 5 seconds.
Temperature coefficient:
Under 1Ω: ±90 ppm/°C
1 to 9.99Ω: ±50 ppm/°C
10Ω and over: ±20 ppm/°C
Dielectric withstanding voltage:
500 VAC: 1 watt rating
1000 VAC: 2, 3, 5, 7 and
10 watt rating
Non-Inductive Winding
Optional (blank = std. winding)
81NJR10
80 Series
Acrasil
®
Silicone Ceramic
Conformal Axial
Term. Wirewound
Wattage
Tolerance Resistance Value
R10 = 0.10Ω
1 = 1W
F= 1%
1R0 = 1.0Ω
J = 5%
2
10R = 10.0Ω
3
250 =
250Ω
5
1K0 = 1,000Ω
0 = 10W
4K5 = 4,500Ω
50K = 50,000Ω
This product will
not be made avail-
able as RoHS
Compliant.
For RoHS
Compliant equiva-
lent, see
40 Series.
Military Grade
Non-Inductive versions available. Insert “N” before tolerance code. Example: 83NF2K21
½½½½½½½½½½
RW Series
Military grade
Tolerance
Resistance Value
F = 1%
R100 = 0.1½
J = 5%
1R00 = 1.0½
10R0 = 10.0½
1000 = 100½
1002 = 10K½
1001 = 1000½
1503 = 150K½
Ohmite’s highest quality conformal axial terminal silicone-ceram-
ic 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.
COMMERCIAL GRADE PART NUMBERS
Ohmic value
Ohmic value
Ohmic value
Ohmic value
Ohmic value
Wattage
1
3
5
10
Part No.
Prefix
Suffix
–––R10
–––R11
–––R121
–––R133
–––R15
–––R162
–––R182
–––R20
–––R221
–––R249
–––R274
–––R301
–––R332
–––R374
–––R392
–––R402
–––R453
–––R499
–––R511
–––R562
–––R619
–––R681
–––R75
–––R825
–––R909
–––1R0
–––1R1
–––1R21
–––1R33
–––1R5
–––1R62
–––1R82
–––2R0
81F–––
83F–––
85F–––
80F–––
Wattage
1
3
5
10
Part No.
Prefix
Suffix
–––2R21
–––2R49
–––2R74
–––3R01
–––3R32
–––3R74
–––4R02
–––4R53
–––4R99
–––5R11
–––5R62
–––6R19
–––6R81
–––7R5
–––8R25
–––9R09
–––10R
–––11R
–––12R1
–––13R3
–––15R
–––16R2
–––18R2
–––20R
–––22R1
–––24R9
–––27R4
–––30R1
–––33R2
–––37R4
–––40R2
–––45R3
–––49R9
81F–––
83F–––
85F–––
80F–––
Wattage
1
3
5
10
Part No.
Prefix
Suffix
–––51R1
–––56R2
–––61R9
–––68R1
–––75R
–––82R5
–––90R9
–––100
–––110
–––121
–––133
–––150
–––162
–––182
–––200
–––221
–––249
–––274
–––301
–––332
–––374
–––402
–––453
–––499
–––511
–––562
–––619
–––681
–––750
–––825
–––909
–––1K0
–––1K1
81F–––
83F–––
85F–––
80F–––
Wattage
1
3
5
10
Part No.
Prefix
Suffix
–––1K21
–––1K33
–––1K5
–––1K62
–––1K82
–––2K0
–––2K21
–––2K49
–––2K74
–––3K01
–––3K32
–––3K74
–––4K02
–––4K53
–––4K99
–––5K11
–––5K62
–––6K19
–––6K81
–––7K5
–––8K25
–––9K09
–––10K
–––10K5
–––11K
–––12K1
–––13K3
–––15K
–––16K2
–––18K2
–––20K
–––22K1
–––24K9
81F–––
83F–––
85F–––
80F–––
Wattage
Part No.
Prefix
Suffix
–––27K4
–––30K1
–––33K2
–––37K4
–––38K3
–––40K2
–––45K3
–––49K9
–––51K1
–––56K2
–––61K9
–––68K1
–––75K
–––82K5
–––90K9
–––100K
–––150K
–––200K
85F–––
5
80F–––
10
0.1
0.11
0.121
0.133
0.15
0.162
0.182
0.2
0.221
0.249
0.274
0.301
0.332
0.374
0.392
0.402
0.453
0.499
0.511
0.562
0.619
0.681
0.75
0.825
0.909
1
1.1
1.21
1.330
1.5
1.62
1.82
2
2.21
2.49
2.74
3.01
3.32
3.74
4.02
4.53
4.99
5.11
5.62
6.19
6.81
7.5
8.25
9.09
10
11
12.1
13.3
15
16.2
18.2
20
22.1
24.9
27.4
30.1
33.2
37.4
40.2
45.3
49.9
51.1
56.2
61.9
68.1
75
82.5
90.9
100
110
121
133
150
162
182
200
221
249
274
301
332
374
402
453
499
511
562
619
681
750
825
909
1,000
1,100
1,210
1,330
1,500
1,620
1,820
2,000
2,210
2,490
2,740
3,010
3,320
3,740
4,020
4,530
4,990
5,110
5,620
6,190
6,810
7,500
8,250
9,090
10,000
10,500
11,000
12,100
13,300
15,000
16,200
18,200
20,000
22,100
24,900
27,400
30,100
33,200
37,400
38,300
40,200
45,300
49,900
51,100
56,200
61,900
68,100
75,000
82,500
90,900
100,000
150,000
200,000
= Standard values
= Non-standard values
subject to minimum
handling charge per
item
Shaded values involve
very fine resistance wire
and should not be used
in critical applications
without burn-in and/or
thermal cycling.
Check product availability at
www.ohmite.com
22
Ohmite Mfg. Co.
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