Page 1
RH, NH
Vishay Dale
Wirewound Resistors, Military, MIL-PRF-18546 Qualified,
Type RE, Aluminum Housed, Chassis Mount
FEATURES
• Molded construction for total environmental
protection
• Complete welded construction
• Meets applicable requirements of
MIL-PRF-18546
• Available in non-inductive styles (type NH) with
Aryton-Perry winding for lowest reactive
components
• Mounts on chassis to utilize heat-sink effect
• Excellent stability in operation (< 1 % change in resistance)
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
RH005 RH-5
NH005 NH-5
RH010 RH-10
NH010 NH-10
RH025 RH-25
NH025 NH-25
RH050 RH-50
NH050 NH-50
RH100 RH-100
NH100 NH-100
RH250 RH-250
NH250 NH-250
Note: Figures in parentheses on RH-5 and RH-10 indicate wattage printed on parts, new construction allows these resistors to be rated at
HISTORICAL
MODEL
higher wattage but will only be printed with the higher wattage on customer request.
MIL-PRF-
18546
TYPE
-
RE60G
-
RE60N
-
RE65G
-
RE65N
-
RE70G
-
RE70N
-
RE75G
-
RE75N
-
RE77G
-
RE77N
-
RE80G
-
RE80N
POWER RATING
P
25 °C
W
DALE MILITARY ± 0.05 %, ± 0.1 % ± 0.25 % ± 0.5 % ± 1 %, ± 2 %, ± 5 %
7.5 (5)
7.5 (5)
12.5 (10)
12.5 (10)
25
25
50
50
100
100
250
250
5
5
10
10
20
20
30
30
75
75
120
120
0.5 - 6.75K
-
0.5 - 2.32K-0.1 - 3.27K-0.05 - 3.27K-0.05 - 12.75K
0.5 - 12.7K-0.1 - 16.69K-0.05 - 16.69K-0.01 - 47.1K
0.5 - 4.45K-0.1 - 5.54K-0.05 - 5.54K
0.5 - 25.7K-0.1 - 32.99K-0.05 - 32.99K-0.01 - 95.2K
0.5 - 9.09K-0.1 - 12.8K-0.05 - 12.8K
0.5 - 73.4K
-
0.5 - 26K
-
0.5 - 90K
-
0.5 - 37.5K-0.1 - 37.5K-0.05 - 37.5K
0.5 - 116K
-
0.5 - 48.5K-0.1 - 48.5K-0.05 - 48.5K
RESISTANCE RANGE
MIL. RANGE SHOWN IN BOLD FACE
0.1 - 8.6K-0.05 - 8.6K
0.1 - 96K-0.05 - 96K
0.1 - 36.7K-0.05 - 36.7K
0.1 - 90K-0.05 - 90K
0.1 - 116K-0.05 - 116K
Ω
-
-
-
-
-
-
-
-
-
0.02 - 24.5K
0.10 - 3.32K
1.0 - 1.65K
0.10 - 5.62K
0.05 - 23.5K
1.0 - 2.8K
0.10 - 12.1K
0.05 - 47.6K
1.0 - 6.04K
0.01 - 273K
0 .10 - 39.2K
0.05 - 136K
1.0 - 19.6K
0.05 - 90K
0.05 - 29.4K
0.05 - 37.5K
1.0 - 14.7K
0.05 - 116K
0.10 - 35.7K
0.05 - 48.5K
1.0 - 17.4K
Pb-free
Available
RoHS*
COMPLIANT
WEIGHT
(Typical)
g
3
3.3
6
8.8
13
16.5
28
35
350
385
630
690
e4
GLOBAL PART NUMBER INFORMATION
New Global Part Numbering: RH0054R125FC02 (preferred part number format)
H0054R125R FC0 2
GLOBAL MODEL
RH005
(See “Standard
Electrical
Specifications”
table above for
additional P/N’s)
Historical Part Number example: RH-5 4.125 Ω 1 % C02 (will continue to be accepted)
RH-5 4.125 Ω 1 % C02
HISTORICAL MODEL RESISTANCE VALUE TOLERANCE CODE PACKAGING
* Pb containing terminations are not RoHS compliant, exemptions may apply
www.vishay.com For technical questions, contact: ww2bresistors@vishay.com
166 Revision: 11-Jul-07
RESISTANCE
VAL UE
L = Milliohm
R = Decimal
K = Thousand
8L000 = 0.008 Ω
15R00 = 15 Ω
TOLERANCE
CODE
A = 0.05 %
B = 0.1 %
C = 0.25 %
D = 0.5 %
F = 1.0 %
PACKAGING SPECIAL
E02 = Lead (Pb)-free, Card Pack (RH005 - RH050)
E01 = Lead (Pb)-free, Skin Pack (RH100 & RH250)
Lead (Pb)-free is not available on RE military type
C02 = Tin/Lead, Card Pack (RH005 - RH050)
J01 = Tin/Lead, Skin Pack (RH100 & RH250)
Document Number: 30201
(Dash Number)
(up to 3 digits)
From 1 - 999
as applicable
Page 2
RH, NH
DIMENSIONS
RH-5, -10, -25, -50
NH-5, -10, -25, -50
MODEL
RH-5
NH-5
RH-10
NH-10
RH-25
NH-25
RH-50
NH-50
AB
11.28
± 0.127
[0.444
± 0.005]
14.27
± 0.127
[0.562
± 0.005]
18.26
± 0.127
[0.719
± 0.005]
39.67
± 0.127
[1.562
± 0.005]
Wirewound Resistors, Military, MIL-PRF-18546 Qualified,
Type RE, Aluminum Housed, Chassis Mount
D
12.45
± 0.127
[0.490
± 0.005]
15.88
± 0.127
[0.625
± 0.005]
19.84
± 0.127
[0.781
± 0.005]
21.44
± 0.127
[0.844
± 0.005]
B
C
15.24
± 0.7871
[0.600
± 0.03]
19.05
± 0.787
[0.750
± 0.031]
26.97
± 0.787
[1.062
± 0.031]
49.99
± 0.787
[1.968
± 0.031]
C
A
K
DEFGHJKLMNP
28.58
± 1.57
[1.125
± 0.062]
34.93
± 1.57
[1.375
± 0.062]
49.23
± 1.57
[1.938
± 0.062]
70.64
± 1.57
[2.781
± 0.062]
± 0.381
[0.334
± 0.015]
10.67
± 0.381
[0.420
± 0.015]
13.97
± .381
[0.550
± 0.015]
16.00
± 0.381
[0.630
± 0.015]
M
N
P
L
DIMENSIONS in millimeters [inches]
8.48
16.41
± 0.381
[0.646
± 0.015]
20.32
± 0.381
[0.800
± 0.015]
27.43
± 0.381
[1.080
± 0.015]
28.96
± 0.381
[1.140
± 0.015]
8.13
± 0.381
[0.320
± 0.015]
9.91
± 0.381
[0.390
± 0.015]
13.87
± 0.381
[0.546
± 0.015]
15.49
± 0.381
[0.610
± 0.015]
± 0.010]
± 0.010]
± 0.010]
± 0.010]
1.65
± 0.254
[0.065
1.91
± 0.254
[0.075
1.91
± 0.254
[0.075
2.24
± 0.254
[0.088
3.38
± 0.254
[0.133
± 0.010]
4.19
± 0.254
[0.165
± 0.010]
5.87
± 0.254
[0.231
± 0.010]
6.60
± 0.254
[0.260
± 0.010]
J
1.98
± 0.254
[0.078
± 0.010]
2.36
± 0.254
[0.093
± 0.010]
4.37
± 0.254
[0.172
± 0.010]
4.98
± 0.254
[0.196
± 0.010]
2.36
± 0.127
[0.093
± 0.005]
2.39
± 0.127
[0.094
± 0.005]
3.18
± 0.127
[0.125
± 0.005]
3.18
± 0.127
[0.125
± 0.005]
Vishay Dale
F
E
H
1.98
± 0.381
[0.078
± 0.015]
2.59
± 0.381
[0.102
± 0.015]
2.92
± 0.381
[0.115
± 0.015]
2.72
± 0.381
[0.107
± 0.015]
1.27
± 0.127
[0.050
± 0.005]
2.16
± 0.127
[0.085
± 0.005]
2.16
± 0.127
[0.085
± 0.005]
2.16
± 0.127
[0.085
± 0.005]
G
6.76
± 1.57
[0.266
± 0.062]
7.92
± 1.57
[0.312
± 0.062]
11.13
± 1.57
[0.438
± 0.062]
11.13
± 1.57
[0.438
± 0.062]
DIMENSIONS
RH-100, NH-100
Nickel Plated
Brass Nut
Stainless Steel Stud
71.42 ± 0.787
[2.812 ± 0.031]
12 - 24
UNC-2A
Thd. Typ.
RH-250, NH-250
Nickel Plated
Brass Nut
Stainless Steel Stud
76.20 ± 0.787
[3.0 ± 0.031]
7.92 ± 0.787
[0.312 ± 0.031]
177.80 ± 2.36 [7.0 ± 0.093]
88.90 ± 0.787
[3.50 ± 0.031]
9.52 ± 0.787
[0.375 ± 0.031]
69.85 ± 0.254
[2.75 ± 0.010]
139.14 ± 2.36
[5.478 ± 0.093]
4.78 ± 0.254
[0.188 ± 0.010]
Dia. Typ.
114.30 ± 0.787
[4.50 ± 0.031]
22.23 ± 0.254
[0.875 ± 0.010]
76.20 ± 0.254
[3.0 ± 0.010]
98.42 ± 0.254
[3.875 ± 0.010]
Document Number: 30201 For technical questions, contact: ww2bresistors@vishay.com
Revision: 11-Jul-07 167
4.78 ± 0.254
[0.188 ± 0.010]
Dia. Typ.
28.58 ± 0.787
[1.125 ± 0.031]
57.15 ± 0.254
[2.25 ± 0.010]
25.12 ± 0.787
[0.989 ± 0.031]
1/4 - 20
UNC-2A Thd. Typ.
31.75 ± 1.575
[1.25 ± 0.062]
63.50 ± 0.254
[2.50 ± 0.010]
31.75 ± 1.575
[1.25 ± 0.062]
46.02
± 0.787
[1.812 ± 0.031]
4.78
[0.188 ± 0.031]
53.98
± 0.787
[2.125 ± 0.031]
44.45
[1.75 ± 0.031]
± 0.787
Typ.
6.35
± 0.787
[0.250 ± 0.031
Typ.]
± 0.787
19.56
± 0.381
[0.770 ± 0.015]
55.58
± 0.787
[2.188 ± 0.031]
24.26
± 0.381
[0.955 ± 0.015]
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Page 3
RH, NH
Vishay Dale
Wirewound Resistors, Military, MIL-PRF-18546 Qualified,
Type RE, Aluminum Housed, Chassis Mount
TECHNICAL SPECIFICATIONS
PARAMETER UNIT RH RESISTOR CHARACTERISTICS
Temperature Coefficient ppm/°C ± 100 for 0.1 Ω to 0.99 Ω, ± 50 for 1 Ω to 9.9 Ω, ± 20 for 10 Ω and above
Dielectric Withstanding Voltage
V
AC
Short Time Overload - 5 × rated power for 5 seconds
Maximum Working Voltage V
Insulation Resistance Ω 10 000 MΩ minimum dry, 1000 MΩ minimum after moisture test
Terminal Strength lb 5 minimum for RH-5 and RH-10, 10 minimum for all others
Solderability - MIL-PRF-18546 Type - Meets requirements of ANSI J-STD-002
Operating Temperature Range °C - 55/+ 250
POWER RATING
Vishay RH resistor wattage ratings are based on mounting to the following heat sink:
RH-5 and RH-10: 4" × 6" × 2" × 0.040" thick aluminum chassis (129 sq. in. surface area)
RH-25: 5" × 7" × 2" × 0.040" thick aluminum chassis (167 sq. in. surface area)
RH-50: 12" × 12" × 0.059" thick aluminum panel (291 sq. in. surface area)
RH-100 and RH-250: 12" × 12" × 0.125" thick aluminum panel (294 sq. in. surface area)
AMBIENT TEMPERATURE DERATING
Derating is required for ambient temperatures above 25 °C, see the following graph.
Curves A, B, C apply to operation of unmounted resistors. Curve D applies to all types when mounted to specified heat sink.
A = RH-5 and RH-10 size resistor, unmounted
B = RH-25 size resistor, unmounted
C = RH-50, RH-100 and RH-250 size resistor, unmounted
D = All types mounted to recommended aluminum heat sink
% NI R
120
1000 for RH/5, RH-10 and RH/25, 2000 for RH/50, 4500 for RH/100 and RH/250
1/2
(P x R)
E
100
W
O
P
80
D
ET
A
R
60
40
20
0
- 55 - 50 0 50 150 250
A
B
C
25
Derating
REDUCED HEAT SINK DERATING:
Derating is also required when recommended heat sink
area is reduced.
A = RH-5 and RH-10 size resistor
B = RH-25 size resistor
C = RH-50, RH-100 and RH-250 size resistor
D
AMBIENT TEMPERATURE IN
100
% NI REWOP DETAR
90
80
70
60
50
40
30
20
10
Heat Sink Derating
A
B
C
0
020406080100
% OF RECOMMENDED HEAT SINK AREA
°C
www.vishay.com For technical questions, contact: ww2bresistors@vishay.com Document Number: 30201
168 Revision: 11-Jul-07
Page 4
RH, NH
Wirewound Resistors, Military, MIL-PRF-18546 Qualified,
Type RE, Aluminum Housed, Chassis Mount
MATERIAL SPECIFICATIONS
Element: Copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
Core: Ceramic, steatite or alumina, depending on physical
size
Encapsulant: Silicone molded construction
Housing: Aluminum with hard anodic coating
End Caps: Stainless steel
Standard Terminals: For RH-5 through RH-50 size terminal
finish - Tin/lead is 60/40 Sn/Pb w/Nickel underplate & Lead
(Pb)-free is Ni/Pd/Au, finish is on copper clad steel core
terminal. For RH-100 & RH-250 terminals are threaded
stainless steel.
Note: Military (RE) parts are only available with tin/lead finish
Part Marking: DALE, Model, Wattage, Value, Tolerance,
Date Code
NH NON-INDUCTIVE
Models of equivalent physical and electrical specifications
are available with non-inductive (Aryton-Perry) winding.
They are identified by substituting the letter N for R in the
model number (NH-5, for example).
Vishay Dale
SPECIAL MODIFICATIONS
A number of special modifications to the aluminum housed
resistor style are available upon request. Special
modifications include:
• Terminal configurations and materials
• Resistance values and tolerances
• Low resistance temperature coefficient (RTC)
• Housing configuration
• Threaded mounting holes
• Preconditioning and other additional testing
APPLICABLE MIL SPECIFICATIONS
MIL-PRF-18546 is the military specification covering
aluminum housed, chassis mount, power resistors. VISHAY
RH and NH resistors are listed as qualified on the
MIL-PRF-18546 QPL.
PERFORMANCE
TEST CONDITIONS OF TEST TEST LIMITS
Thermal Shock Rated power applied until thermally stable, then a minimum of 15 minutes at - 55 °C ± (0.5 % + 0.05 Ω) ΔR
Short Time Overload 5 × rated power for 5 seconds ± (0.5 % + 0.05 Ω) ΔR
Dielectric Withstanding Voltage
Temperature 250 °C for 2 hours ± (0.5 % + 0.05 Ω) ΔR
Moisture Resistance MIL-STD-202 Method 106, 7b not applicable ± (1.0 % + 0.05 Ω) ΔR
Shock, Specified Pulse MIL-STD-202 Method 213, 100 g's for 6 ms, 10 shocks ± (0.2 % + 0.05 Ω) ΔR
Vibration, High Frequency Frequency varied 10 to 2000 Hz, 20 g peak, 2 directions 6 hours each ± (0.2 % + 0.05 Ω) ΔR
Load Life 1000 hours at rated power, + 25 °C, 1.5 hours “ON”, 0.5 hours “OFF” ± (1.0 % + 0.05 Ω) ΔR
Terminal Strength
1000 V
4500 V
30 second, 5 pound pull test for RH-5 and RH-10, 10 pound pull test for other sizes,
torque test - 24 pound inch for RH-100 and 32 pound inch for RH-250
for RH-5, RH-10 and RH-25; 2000 V
rms
for RH-100 and RH-250; duration one minute
rms
for RH-50
rms
± (0.2 % + 0.05 Ω) ΔR
± (0.2 % + 0.05 Ω) ΔR
Document Number: 30201 For technical questions, contact: ww2bresistors@vishay.com
Revision: 11-Jul-07 169
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Page 5
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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