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
Aryton-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
• Compliant to RoHS Directive 2002/95/EC
Notes
*
Pb containing terminations are not RoHS compliant, exemptions may apply
**
Please see document “Vishay Material Category Policy”:
www.vishay.com/doc?99902
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
HISTORICAL
MODEL
POWER
RATING
P
25 °C
W
7.5
7.5
12.5
12.5
25
25
50
50
100
100
250
250
RESISTANCE
RANGE
± 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
RESISTANCE
RANGE
± 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
± 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
± 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
3.3
6
8.8
13
16.5
28
35
350
385
630
690
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
-
°C
RH RESISTOR CHARACTERISTICS
± 20 for 10
and above; ± 50 for 1
to 9.9
,
± 100 for 0.1
to 0.99
(P x
R)
1/2
10 000 M minimum dry, 1000 M 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
0
0
5
4
R
1
2
5
F
C
PACKAGING
0
2
SPECIAL
(Dash Number)
(up to 3 digits)
From
1 to 999
as applicable
GLOBAL MODEL
RH005
(See Standard
Electrical
Specifications
Global Model
column for
options)
RH-5
RESISTANCE VALUE
R
= Decimal
K
= Thousand
15R00
= 15
10K00
= 10 k
TOLERANCE CODE
A
= 0.05 %
B
= 0.1 %
C
= 0.25 %
D
= 0.5 %
F
= 1.0 %
H
= 3.0 %
J
= 5.0 %
4.125
E02
= Lead (Pb)-free, card pack (RH005 - RH050)
E01
= Lead (Pb)-free, skin pack (RH100 and RH250)
C02
= Tin/lead, card pack (RH005 - RH050)
J01
= Tin/lead, skin pack (RH100 and RH250)
Historical Part Numbering example: RH-5 4.125
1 % C02
1%
TOLERANCE CODE
C02
PACKAGING
HISTORICAL MODEL
Revision: 23-Nov-11
RESISTANCE VALUE
Document Number: 30201
1
For technical questions, contact:
ww2bresistors@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
DIMENSIONS
in inches [millimeters]
RH005, 010, 025, 050
NH005, 010, 025, 050
D
C
A
M
N
B
P
K
L
H
J
F
E
G
Vishay Dale
GLOBAL
MODEL
RH005
NH005
DIMENSIONS
in inches [millimeters]
A
B
C
D
E
F
G
H
J
K
L
M
N
P
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]
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
± 0.015 ± 0.015 ± 0.015 ± 0.010 ± 0.010 ± 0.010 ± 0.005 ± 0.015 ± 0.005 ± 0.062
± 0.005 ± 0.005 ± 0.031 ± 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]
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]
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]
RH010
NH010
RH025
NH025
RH050
NH050
DIMENSIONS
in inches [millimeters]
RH100, NH100
Nickel plated
brass
nut
stainless steel stud
3.50
± 0.031
[88.90 ± 0.787]
0.188 ± 0.010
[4.78 ± 0.254]
Dia. typ.
1.125 ± 0.031
[28.58 ± 0.787]
2.25 ± 0.010
[57.15 ± 0.254]
12 - 24
UNC-2A
Thd. typ.
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]
0.989 ± 0.031
[25.12 ± 0.787]
1.75 ± 0.031
[44.45 ± 0.787]
1.812 ± 0.031
[46.02 ± 0.787]
2.812 ± 0.031
[71.42 ± 0.787]
0.188 ± 0.031 0.770 ± 0.015
[4.78 ± 0.787] [19.56 ± 0.381]
typ.
RH250, NH250
Nickel plated
brass
nut
stainless steel stud
1/4 - 20
UNC-2A thd. typ.
2.125 ± 0.031
[53.98 ± 0.787]
3.0
± 0.031
[76.20 ± 0.787]
1.25 ± 0.062
[31.75 ± 1.575]
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]
0.250 ± 0.031
[6.35 ± 0.787]
typ.
55.58 ± 0.787
[2.188 ± 0.031]
0.312 ± 0.031
[7.92 ± 0.787]
1.25 ± 0.062
[31.75 ± 1.575]
0.955 ± 0.015
[24.26 ± 0.381]
Revision: 23-Nov-11
Document Number: 30201
2
For technical questions, contact:
ww2bresistors@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
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)
Vishay Dale
FREE AIR POWER RATING
GLOBAL
MODEL
W at 25 °C
RH005
NH005
4.5
RH010
NH010
7.5
RH025
NH025
12.5
RH050
NH050
20
RH100
NH100
40
RH250
NH250
100
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
= 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
RATED POWER IN %
120
100
80
60
40
20
0
- 55 - 50
A
B
C
D
0
25
50
150
250
AMBIENT TEMPERATURE IN °C
REDUCED HEAT SINK DERATING
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
RATED POWER IN %
100
90
80
70
60
50
40
30
20
10
0
0
20
40
60
80
100
B
C
A
% OF RECOMMENDED HEAT
SINK
AREA
Revision: 23-Nov-11
Document Number: 30201
3
For technical questions, contact:
ww2bresistors@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
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 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.
Part Marking:
Dale, model, wattage, value, tolerance, date
code
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
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 (Aryton-Perry) winding.
They are identified by substituting the letter N for R in the
model number (NH005, for example).
PERFORMANCE
TEST
Thermal Shock
Short Time Overload
Dielectric Withstanding
Voltage
Temperature
Moisture Resistance
Shock, Specified Pulse
Vibration, High Frequency
Load Life
Terminal Strength
CONDITIONS OF TEST
Rated power applied until thermally stable, then a minimum of 15 min at - 55 °C
5 x rated power for 5 s
1000 V
rms
for RH005, RH010 and RH025; 2000 Vrms for RH050;
4500 V
rms
for RH100 and RH250; duration 1 min
250 °C for 2 h
MIL-STD-202 Method 106, 7b not applicable
MIL-STD-202 Method 213, 100
g’s
for 6 ms, 10 shocks
Frequency varied 10 Hz to 2000 Hz, 20
g
peak, 2 directions 6 h each
1000 h at rated power, + 25 °C, 1.5 h “ON”, 0.5 h “OFF”
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
TEST LIMITS
± (0.5 % + 0.05
) R
± (0.5 % + 0.05
) R
± (0.2 % + 0.05
) R
± (0.5 % + 0.05
) R
± (1.0 % + 0.05
) R
± (0.2 % + 0.05
) R
± (0.2 % + 0.05
) R
± (1.0 % + 0.05
) R
± (0.2 % + 0.05
) R
Revision: 23-Nov-11
Document Number: 30201
4
For technical questions, contact:
ww2bresistors@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
Legal Disclaimer Notice
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
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 in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular
product with the properties described in the product specification is suitable for use in a particular application. Parameters
provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All
operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree
to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and
damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay
or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to
obtain written terms and conditions regarding products designed for such applications.
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. Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 11-Mar-11
www.vishay.com
1
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