81NFR10 Datasheet, PDF (1/1 Pages) Ohmite Mfg. Co. – Military Grade 80 Series MIL-R-26 Qualified

80 Series
Commercial Grade Acrasil^®‚ Silicone-Ceramic
Conformal Axial Terminal Wirewound
1% Tol. (5% avail.)
RW Series
Military Grade 80 Series MIL-R-26 Qualified
1.5 / 38.1
L
D
Comm. Military
Grade Grade Watts Ohms
Dimensions (in. / mm)
Lead
Length
Diam. Voltage ga.
81F RW70U 1 0.1-6K 0.437 / 11.1 0.125 / 3.2 150 24
82
2 0.1-8K 0.406 / 10.3 0.219 / 5.6 100 20
83F RW79U 3 0.1-20K 0.593 / 15.1 0.218 / 5.5 200 20
83J RW69V
85F RW74U 5 0.1-75K 0.937 / 23.8 0.343 / 8.7 460 18
85J RW67V
80F RW78U 10 0.1-150K 1.842 / 46.8 0.406 /10.3 1000 18
80J RW68V
Non-Inductive versions available. Insert “N” before tolerance code. Example: 83NF2K21
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.
FEATURES
• Designed for precision power
applications
• All-welded construction
• RW Series “Mil” value resistors
marked with “Mil” in accordance
with MIL-R-26 specifications
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.
SPECIFICATIONS
Material
Coating: Silicone-ceramic.
Overload: Under 5 watts: 5 times
rated wattage for 5 seconds. 5
watts and over: 10 times rated
wattage for 5 seconds.
Core: Ceramic.
Temperature coefficient:
Terminals: Solder-coated copper
clad axial.
Under 1Ω: ±90 ppm/°C
1 to 9.99Ω: ±50 ppm/°C
Derating: Linearly from
10Ω and over: ±20 ppm/°C
100% @ +25°C to
Dielectric withstanding voltage:
0% @ +275°C.
500 VAC: 1 watt rating
1000 VAC: 2, 3, 5, 7 and
ORDERING INFORMATION
10 watt rating
Commercial Grade
Non-Inductive Winding
Optional (blank = std. winding)
81NJR10
80 Series
Wattage Tolerance Resistance Value
Acrasil^®
1 = 1W F= 1% R10 = 0.10Ω
Silicone Ceramic 2
J = 5% 1R0 = 1.0Ω
Conformal Axial 3
10R = 10.0Ω
Term. Wirewound 5
250 = 250Ω
0 = 10W
1K0 = 1,000Ω
4K5 = 4,500Ω
Military Grade
50K = 50,000Ω
����������
RW Series
Military grade
Tolerance
Resistance Value F = 1%
R100 = 0.1�
J = 5%
1R00 = 1.0�
10R0 = 10.0�
1000 = 100� 1002 = 10K�
1001 = 1000� 1503 = 150K�
This product will
not be made avail-
able as RoHS
Compliant.
For RoHS
Compliant equiva-
lent, see 40 Series.
Wattage
Part No.
Prefix 
Suffix
0.1 –––R10
0.11 –––R11
0.121 –––R121
0.133 –––R133
0.15 –––R15
0.162 –––R162
0.182 –––R182
0.2 –––R20
0.221 –––R221
0.249 –––R249
0.274 –––R274
0.301 –––R301
0.332 –––R332
0.374 –––R374
0.392 –––R392
0.402 –––R402
0.453 –––R453
0.499 –––R499
0.511 –––R511
0.562 –––R562
0.619 –––R619
0.681 –––R681
0.75 –––R75
0.825 –––R825
0.909 –––R909
1
–––1R0
1.1 –––1R1
1.21 –––1R21
1.330 –––1R33
1.5 –––1R5
1.62 –––1R62
1.82 –––1R82
2
–––2R0
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COMMERCIAL GRADE PART NUMBERS
Wattage
Wattage
Wattage
Wattage
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
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
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Part No.
Prefix 
Suffix
51.1 –––51R1
56.2 –––56R2
61.9 –––61R9
68.1 –––68R1
75 –––75R
82.5 –––82R5
90.9 –––90R9
100 –––100
110 –––110
121 –––121
133 –––133
150 –––150
162 –––162
182 –––182
200 –––200
221 –––221
249 –––249
274 –––274
301 –––301
332 –––332
374 –––374
402 –––402
453 –––453
499 –––499
511 –––511
562 –––562
619 –––619
681 –––681
750 –––750
825 –––825
909 –––909
1,000 –––1K0
1,100 –––1K1
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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
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
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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
Part No.
Prefix 
Suffix
–––27K4
–––30K1
–––33K2
–––37K4
–––38K3
–––40K2
–––45K3
–––49K9
–––51K1
–––56K2
–––61K9
–––68K1
–––75K
–––82K5
–––90K9
–––100K
–––150K
–––200K
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 = 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. 1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax [phone] • www.ohmite.com • [e-mail]