200 Series
Brown Devil® Vitreous Enamel Power
Ohmite’s Brown Devil® is a small, exceptionally
durable power resistor. It features all-welded con-
struction and rugged, flame resistant conformal lead
free vitreous enamel coating to ensure successful
performance under high temperatures.
The wirewound 200 Series has a hollow-core con-
struction, which accommodates rigid mounting with
brackets or thru bolts.
Mounting brackets not included with resistors.
F e at u r e S
• Rugged lead free vitreous enamel coating
• All-welded construction.
• Self supporting terminal mounting option.
• Higher power ratings.
• Flame-resistant lead free vitreous enamel coating.
• RoHS compliant product available. Add “E” suffix to
part number to specify.
S e r i e S S P e c i F i c at i O N S
Series
B5
B8
B12
B20
Non-Inductive versions available. Insert “N” before tolerance code.
Example:
B5NJ10RE
Also available in low cost Centohm or Silicone coating. Consult Ohmite.
* Maximum Voltage is based on Ohm’s Law [V=√P*R] as limited by the resis-
tance value of specified product
Wattage
Ohms
Lead Gauge Max. Voltage*
5.25
0.1-20K
20
187
8.0
0.03-25K
18
250
12.0
0.08-51K
18
625
20.0
0.1-100K
18
750
characteriSticS
Coating
lead-free vitreous enamel
Core
Ceramic
Terminals
Tinned axial; RoHS solder composition is 96% Sn, 3.5%
Ag, 0.5% Cu
Derating
Linearly from 100% @ +25°C to 0% @ +350°C
Tolerance
1Ω+: ±5%
under 1Ω: ±10%
Temperature coefficient
5Ω and under: ±400 ppm/°C
Above 5Ω: ±260 ppm/°C
Max. amps
To calculate, use the formula √P/R
Power rating
Based on 25°C free air rating
Overload
10 times rated wattage for 5 seconds
(continued)
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83
200 Series
(in. /
mm)
Brown Devil® Vitreous Enamel Power
dimeNSiONS
1.50 in. -0/+0.25
38.10 mm -0/+6.35
Series
B5
B8
B12
B20
Wattage
5.25
12.0
20.0
8.0
L
0.625 / 15.88
1.000 / 25.40
1.750 / 44.45
2.000 / 50.80
D
0.250 / 6.35
0.313 / 7.94
0.313 / 7.94
0.438 / 11.11
C
0.135 / 3.43
0.188 / 4.76
0.250 / 6.35
0.188 / 4.76
Lead Gauge
20
18
18
18
D
L
C
O r d e r i N g i N F O r m at i O N
Standard Values
Wattage
B5J–––
5.25
B8J–––
8
B12J–––
12
B20J–––
20
Ohmic value
Ohmic value
Part No.
Prefix
Suffix
Part No.
Prefix
Suffix
Wattage
B5J–––
5.25
B8J–––
8
B12J–––
12
B20J–––
20
Ohmic value
Part No.
Prefix
Suffix
Wattage
B5J–––
5.25
B8J–––
8
B12J–––
12
B20J–––
20
Ohmic value
Part No.
Prefix
Suffix
Wattage
B5J–––
5.25
B8J–––
8
B12J–––
12
B20J–––
20
Ohmic value
Part No.
Prefix
Suffix
Wattage
B5J–––
5.25
B8J–––
8
B12J–––
12
B20J–––
20
0.5
1
1.1
1.2
1.3
1.5
1.6
1.8
2
2.2
2.4
2.7
3
3.3
3.6
3.9
4
4.3
4.7
5
5.1
5.6
6.2
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
–––R50E
–––1R0E
–––1R1E
–––1R2E
–––1R3E
–––1R5E
–––1R6E
–––1R8E
–––2R0E
–––2R2E
–––2R4E
–––2R7E
–––3R0E
–––3R3E
–––3R6E
–––3R9E
–––4R0E
–––4R3E
–––4R7E
–––5R0E
–––5R1E
–––5R6E
–––6R2E
–––6R8E
–––7R5E
–––8R2E
–––9R1E
–––10RE
–––11RE
–––12RE
–––13RE
–––15RE
–––16RE
–––18RE
20
22
24
25
27
30
33
35
36
39
40
43
47
50
51
56
62
68
75
82
91
100
110
120
125
130
150
160
180
200
220
225
240
250
–––20RE
–––22RE
–––24RE
–––25RE
–––27RE
–––30RE
–––33RE
–––35RE
–––36RE
–––39RE
–––40RE
–––43RE
–––47RE
–––50RE
–––51RE
–––56RE
–––62RE
–––68RE
–––75RE
–––82RE
–––91RE
–––100E
–––110E
–––120E
–––125E
–––130E
–––150E
–––160E
–––180E
–––200E
–––220E
–––225E
–––240E
–––250E
270
300
330
350
360
390
400
430
450
470
500
510
560
600
620
650
680
700
750
800
820
900
910
1,000
1,100
1,200
1,250
1,300
1,500
1,600
1,750
1,800
2,000
2,200
–––270E
–––300E
–––330E
–––350E
–––360E
–––390E
–––400E
–––430E
–––450E
–––470E
–––500E
–––510E
–––560E
–––600E
–––620E
–––650E
–––680E
–––700E
–––750E
–––800E
–––820E
–––900E
–––910E
–––1K0E
–––1K1E
–––1K2E
–––1K25E
–––1K3E
–––1K5E
–––1K6E
–––1K75E
–––1K8E
–––2K0E
–––2K2E
2,250
2,400
2,500
2,700
2,750
3,000
3,300
3,500
3,600
3,900
4,000
4,300
4,500
4,700
5,000
5,100
5,600
6,000
6,200
6,800
7,000
7,500
8,000
8,200
8,500
9,000
9,100
10,000
11,000
12,000
12,500
13,000
13,500
15,000
–––2K25E
–––2K4E
–––2K5E
–––2K7E
–––2K75E
–––3K0E
–––3K3E
–––3K5E
–––3K6E
–––3K9E
–––4K0E
–––4K3E
–––4K5E
–––4K7E
–––5K0E
–––5K1E
–––5K6E
–––6K0E
–––6K2E
–––6K8E
–––7K0E
–––7K5E
–––8K0E
–––8K2E
–––8K5E
–––9K0E
–––9K1E
–––10KE
–––11KE
–––12KE
–––12K5E
–––13KE
–––13K5E
–––15KE
16,000
–––16KE
17,500
–––17K5E
18,000
–––18KE
20,000
–––20KE
22,500
–––22K5E
25,000
–––25KE
30,000
–––30KE
35,000
–––35KE
40,000
–––40KE
45,000
–––45KE
50,000
–––50KE
55,000
–––55KE
60,000
–––60KE
65,000
–––65KE
70,000
–––70KE
75,000
–––75KE
80,000
–––80KE
85,000
–––85KE
90,000
–––90KE
95,000
–––95KE
100,000
–––100KE
= Standard values; check
availability at www.ohmite.com
These values involve very fine
resistance wire and should not
be used in critical applications
without burn-in and/or thermal
cycling:
B5: 6.8K-20KΩ
B8: 12.5K-25KΩ
B12: 30K-51KΩ
B20: 22.5K-100KΩ
Coating
Non-Inductive
Blank = Vitreous
Winding
C = Centohm
Optional (blank
S = Silicone
Wattage
= std. winding)
Made-to-order Parts
RoHS
Compliant
Non-Inductive Winding
Optional (blank
= std. winding)
Core Diameter
See “Core and
Terminal Selection”
RoHS
Compliant
Series
Tolerance
F = 1%
H = 3%
J = 5%
K = 10%
Ohms
1R0 =
1Ω
250 = 250Ω
1K0 = 1,000Ω
25K = 25,000Ω
25K5 = 25,500Ω
200N8D5R000JE
Coating
200 = Vitreous
400 = Silicone
Ceramic
Wattage
3
5.25
8
12
20
Ohms
R500 = 0.500Ω
1R00 = 1Ω
250R = 250Ω
1K00 = 1,000Ω
25K0 = 25,000Ω
25K5 = 25,500Ω
Tolerance
F = 1%
H = 3%
J = 5%
K = 10%
See web-
site for
custom
core info
84
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