RH, NH
www.vishay.com
Vishay Dale
Wirewound Resistors, Industrial Power,
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
Ayrton-Perry winding for lowest reactive
components
• Mounts on chassis to utilize heat-sink effect
• Excellent stability in operation (< 1 % change in
resistance)
• MIL-PRF-18546 qualified, type RE resistors can
be found at: www.vishay.com/doc?30282
• Material categorization:
for definitions of compliance please see
www.vishay.com/doc?99912
LINKS TO ADDITIONAL RESOURCES
3D 3D
3D Models
Available
Available
Available
Available
Note
* This datasheet provides information about parts that are RoHS-compliant and / or parts that are non RoHS-compliant. For example, parts
with lead (Pb) terminations are not RoHS-compliant. Please see the information / tables in this datasheet for details
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
HISTORICAL
MODEL
RESISTANCE
RANGE Ω
± 0.05 %, ± 0.1 %
0.5 to 6.75K
0.5 to 2.32K
0.5 to 12.7K
0.5 to 4.45K
0.5 to 25.7K
0.5 to 9.09K
0.5 to 73.4K
0.5 to 26K
0.5 to 90K
0.5 to 37.5K
0.5 to 116K
0.5 to 48.5K
POWER
RATING
P25 °C W
7.5
7.5
12.5
12.5
25
25
50
50
100
100
250
250
RESISTANCE
RANGE Ω
± 0.25 %
0.1 to 8.6K
0.1 to 3.27K
0.1 to 16.69K
0.1 to 5.54K
0.1 to 32.99K
0.1 to 12.8K
0.1 to 96K
0.1 to 36.7K
0.1 to 90K
0.1 to 37.5K
0.1 to 116K
0.1 to 48.5K
RESISTANCE
RANGE Ω
± 0.5 %
0.05 to 8.6K
0.05 to 3.27K
0.05 to 16.69K
0.05 to 5.54K
0.05 to 32.99K
0.05 to 12.8K
0.05 to 96K
0.05 to 36.7K
0.05 to 90K
0.05 to 37.5K
0.05 to 116K
0.05 to 48.5K
RESISTANCE
RANGE Ω
± 1 %, ± 3 %, ± 5 %
0.02 to 24.5K
0.05 to 12.75K
0.01 to 47.1K
0.05 to 23.5K
0.01 to 95.2K
0.05 to 47.6K
0.01 to 273K
0.05 to 136K
0.05 to 90K
0.05 to 37.5K
0.05 to 116K
0.05 to 48.5K
WEIGHT
(typical)
g
3
3
5
5
12
12
28
28
353
353
637
637
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
• RH005 and NH005 printed with 5 W power rating. RH010 and NH010 printed with 10 W power rating. New construction allows these
resistors to be rated at higher wattage but will only be printed with the higher wattage upon customer request
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature Coefficient
Maximum Working Voltage
Insulation Resistance
Solderability
Operating Temperature Range
UNIT
ppm/°C
V
Ω
°C
RH RESISTOR CHARACTERISTICS
± 20 for 10 Ω and above; ± 50 for 1 Ω to 9.9 Ω, ± 100 for 0.1 Ω to 0.99 Ω
(P x R)1/2
10 000 MΩ minimum dry, 1000 MΩ minimum after moisture test
Meets requirements of ANSI J-STD-002
-55 to +250
GLOBAL PART NUMBER INFORMATION
Global Part Numbering Example: RH0054R125FC02
R
H
GLOBAL MODEL
0
0
5
4
RESISTANCE VALUE
R
1
TOLERANCE CODE
RH005
R = decimal
A = 0.05 %
(see Standard
K = thousand
B = 0.1 %
Electrical
15R00 = 15 Ω
C = 0.25 %
Specifications
10K00 = 10 kΩ
D = 0.5 %
Global Model
F = 1.0 %
column for
H = 3.0 %
options)
J = 5.0 %
Historical Part Numbering Example: RH-5 4.125 Ω 1 % C02
RH-5
4.125 Ω
HISTORICAL MODEL
Revision: 14-Nov-17
RESISTANCE VALUE
2
5
F
C
0
2
PACKAGING
SPECIAL
E02 = lead (Pb)-free, card pack (RH005 - RH050)
E01 = lead (Pb)-free, skin pack (RH100 and RH250)
(dash number)
(up to 3 digits)
from 1 to 999
as applicable
C02 = tin / lead, card pack (RH005 - RH050)
J01 = tin / lead, skin pack (RH100 and RH250)
1%
C02
TOLERANCE CODE
PACKAGING
Document Number: 30201
1
For technical questions, contact: ww2aresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
RH, NH
www.vishay.com
Vishay Dale
DIMENSIONS in inches [millimeters]
D
C
A
RH005, 010, 025, 050
NH005, 010, 025, 050
F
E
M
N
G
J
B
P
K
H
L
DIMENSIONS in inches [millimeters]
GLOBAL
MODEL
A
B
C
D
E
F
G
H
J
K
L
M
N
P
RH005
NH005
0.444
0.490
0.600
1.125
0.334
0.646
0.320
0.065
0.133
0.078
0.093
0.078
0.050
0.266
± 0.005 ± 0.005 ± 0.030 ± 0.062 ± 0.015 ± 0.015 ± 0.015 ± 0.010 ± 0.010 ± 0.010 ± 0.005 ± 0.015 ± 0.005 ± 0.062
[11.28
[12.45
[15.24
[28.58
[8.48
[16.41
[8.13
[1.65
[3.38
[1.98
[2.36
[1.98
[1.27
[6.76
± 0.127] ± 0.127] ± 0.787] ± 1.57] ± 0.381] ± 0.381] ± 0.381] ± 0.254] ± 0.254] ± 0.254] ± 0.127] ± 0.381] ± 0.127] ± 1.57]
RH010
NH010
0.800
0.390
0.075
0.165
0.093
0.094
0.102
0.085
0.312
0.420
0.562
0.625
0.750
1.375
± 0.005 ± 0.005 ± 0.031 ± 0.062 ± 0.015 ± 0.015 ± 0.015 ± 0.010 ± 0.010 ± 0.010 ± 0.005 ± 0.015 ± 0.005 ± 0.062
[10.67
[14.27
[15.88
[19.05
[34.93
[20.32
[9.91
[1.91
[4.19
[2.36
[2.39
[2.59
[2.16
[7.92
± 0.127] ± 0.127] ± 0.787] ± 1.57] ± 0.381] ± 0.381] ± 0.381] ± 0.254] ± 0.254] ± 0.254] ± 0.127] ± 0.381] ± 0.127] ± 1.57]
RH025
NH025
0.719
0.781
1.062
1.938
0.550
1.080
0.546
0.075
0.231
0.172
0.125
0.115
0.085
0.438
± 0.005 ± 0.005 ± 0.031 ± 0.062 ± 0.015 ± 0.015 ± 0.015 ± 0.010 ± 0.010 ± 0.010 ± 0.005 ± 0.015 ± 0.005 ± 0.062
[18.26
[19.84
[26.97
[49.23
[13.97
[27.43
[13.87
[1.91
[5.87
[4.37
[3.18
[2.92
[2.16
[11.13
± 0.127] ± 0.127] ± 0.787] ± 1.57] ± 0.381] ± 0.381] ± 0.381] ± 0.254] ± 0.254] ± 0.254] ± 0.127] ± 0.381] ± 0.127] ± 1.57]
RH050
NH050
1.562
1.968
2.781
0.630
1.140
0.610
0.088
0.260
0.196
0.125
0.107
0.085
0.438
0.844
± 0.005 ± 0.005 ± 0.031 ± 0.062 ± 0.015 ± 0.015 ± 0.015 ± 0.010 ± 0.010 ± 0.010 ± 0.005 ± 0.015 ± 0.005 ± 0.062
[21.44
[39.67
[49.99
[70.64
[16.00
[28.96
[15.49
[2.24
[6.60
[4.98
[3.18
[2.72
[2.16
[11.13
± 0.127] ± 0.127] ± 0.787] ± 1.57] ± 0.381] ± 0.381] ± 0.381] ± 0.254] ± 0.254] ± 0.254] ± 0.127] ± 0.381] ± 0.127] ± 1.57]
DIMENSIONS in inches [millimeters]
RH100, NH100
Stainless steel
nut and stud
3.50 ± 0.031
[88.90 ± 0.787]
0.188 ± 0.010
[4.78 ± 0.254]
Dia. typ.
1.812 ± 0.031
[46.02 ± 0.787]
1.125 ± 0.031
[28.58 ± 0.787]
2.812 ± 0.031
[71.42 ± 0.787]
1.75 ± 0.031
[44.45 ± 0.787]
2.25 ± 0.010
[57.15 ± 0.254]
12 - 24
UNC-2A
Thd. typ.
RH250, NH250
Nickel plated
brass nut
stainless steel stud
0.375 ± 0.031
[9.52 ± 0.787]
2.75 ± 0.010
[69.85 ± 0.254]
5.478 ± 0.093
[139.14 ± 2.36]
0.188 ± 0.010
[4.78 ± 0.254]
Dia. typ.
4.50 ± 0.031
[114.30 ± 0.787]
Revision: 14-Nov-17
1/4 - 20
UNC-2A thd. typ.
0.188 ± 0.031 0.770 ± 0.015
[4.78 ± 0.787] [19.56 ± 0.381]
typ.
2.125 ± 0.031
[53.98 ± 0.787]
1.25 ± 0.062
[31.75 ± 1.575]
3.0 ± 0.031
[76.20 ± 0.787]
0.312 ± 0.031
[7.92 ± 0.787]
0.989 ± 0.031
[25.12 ± 0.787]
2.188 ± 0.031
[55.58 ± 0.787]
2.50 ± 0.010
[63.50 ± 0.254]
0.875 ± 0.010
[22.23 ± 0.254]
3.0 ± 0.010
[76.20 ± 0.254]
3.875 ± 0.010
[98.42 ± 0.254]
7.0 ± 0.093 [177.80 ± 2.36]
1.25 ± 0.062
[31.75 ± 1.575]
0.250 ± 0.031
[6.35 ± 0.787]
typ.
0.955 ± 0.015
[24.26 ± 0.381]
Document Number: 30201
2
For technical questions, contact: ww2aresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
RH, NH
www.vishay.com
Vishay Dale
POWER RATING
Vishay RH resistor wattage ratings are based on mounting to the following heat sink:
RH005 and RH010:
4" x 6" x 2" x 0.040" thick aluminum chassis (129 sq. in. surface area)
RH025:
5" x 7" x 2" x 0.040" thick aluminum chassis (167 sq. in. surface area)
RH050:
12" x 12" x 0.059" thick aluminum panel (291 sq. in. surface area)
RH100 and RH250:
12" x 12" x 0.125" thick aluminum panel (294 sq. in. surface area)
FREE AIR POWER RATING
GLOBAL
MODEL
W at 25 °C
RH005
NH005
RH010
NH010
RH025
NH025
RH050
NH050
RH100
NH100
RH250
NH250
4.5
7.5
12.5
20
40
100
AMBIENT TEMPERATURE DERATING
RATED POWER IN %
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 = RH005 and RH010 size resistor, unmounted
B = RH025 size resistor, unmounted
C = RH050, RH100 and RH250 size resistor, unmounted
D = All types mounted to recommended aluminum heat sink
120
100
80
D
A
60
B
C
40
20
0
- 55 - 50
0
50
150
25
250
AMBIENT TEMPERATURE IN °C
REDUCED HEAT SINK DERATING
RATED POWER IN %
Derating is also required when recommended heat sink area is reduced.
A = RH005 and RH010 size resistor
B = RH025 size resistor
C = RH050, RH100 and RH250 size resistor
100
90
80
70
A
60
B
50
C
40
30
20
10
0
0
20
40
60
80
100
% OF RECOMMENDED HEAT SINK AREA
Revision: 14-Nov-17
Document Number: 30201
3
For technical questions, contact: ww2aresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
RH, NH
www.vishay.com
Vishay Dale
MATERIAL SPECIFICATIONS
SPECIAL MODIFICATIONS
Element: copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
A number of special modifications to the aluminum housed
resistor style are available upon request. Special
modifications include:
Core: ceramic, steatite or alumina, depending on physical
size
• Terminal configurations and materials
Encapsulant: silicone molded construction
• Resistance values and tolerances
Housing: aluminum with hard anodic coating
• Low resistance temperature coefficient (RTC)
End Caps: stainless steel
• Housing configuration
Standard Terminals: For RH005 through RH050 size
terminal finish - tin / lead is 60/40 Sn/Pb w/Nickel underplate
and lead (Pb)-free is Ni/Pd/Au, finish is on copper clad steel
core terminal. For RH100 and RH250 terminals are threaded
stainless steel.
• Threaded mounting holes
Part Marking: Dale, model, wattage, value, tolerance, date
code
• Preconditioning and other additional testing
APPLICABLE MIL SPECIFICATIONS
Vishay RH and NH resistors are listed as qualified on the
MIL-PRF-18546 QPL. MIL-PRF-18546 qualified, type RE
resistors can be found at: www.vishay.com/doc?30282
NH NON-INDUCTIVE
Models of equivalent physical and electrical specifications
are available with non-inductive (Ayrton-Perry) winding.
They are identified by substituting the letter N for R in the
model number (NH005, for example).
PERFORMANCE
TEST
CONDITIONS OF TEST
TEST LIMITS
Thermal Shock
Rated power applied until thermally stable, then a minimum of 15 min at -55 °C
± (0.5 % + 0.05 Ω) ΔR
Short Time Overload
5x rated power for 5 s
± (0.5 % + 0.05 Ω) ΔR
Dielectric Withstanding
Voltage
1000 VRMS for RH005, RH010 and RH025; 2000 VRMS for RH050;
4500 VRMS for RH100 and RH250; duration 1 min
± (0.2 % + 0.05 Ω) ΔR
Temperature
250 °C for 2 h
± (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 Hz to 2000 Hz, 20 g peak, 2 directions 6 h each
± (0.2 % + 0.05 Ω) ΔR
Load Life
1000 h at rated power, +25 °C, 1.5 h “ON”, 0.5 h “OFF”
± (1.0 % + 0.05 Ω) ΔR
Terminal Strength
30 s, 5 pound pull test for RH005 and RH010, 10 pound pull test for other sizes;
torque test - 24 pound inch for RH100 and 32 pound inch for RH250
± (0.2 % + 0.05 Ω) ΔR
Revision: 14-Nov-17
Document Number: 30201
4
For technical questions, contact: ww2aresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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Revision: 01-Jan-2023
1
Document Number: 91000