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)
Pb-free
Available
e4
RoHS*
COMPLIANT
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL HISTORICAL MIL-PRF-
18546
MODEL
MODEL
TYPE
RH005
NH005
RH010
NH010
RH025
NH025
RH050
NH050
RH100
NH100
RH250
NH250
RH-5
NH-5
RH-10
NH-10
RH-25
NH-25
RH-50
NH-50
RH-100
NH-100
RH-250
NH-250
-
RE60G
-
RE60N
-
RE65G
-
RE65N
-
RE70G
-
RE70N
-
RE75G
-
RE75N
-
RE77G
-
RE77N
-
RE80G
-
RE80N
POWER RATING
P
25 °C
W
DALE
RESISTANCE RANGE
MIL. RANGE SHOWN IN BOLD FACE
Ω
± 0.25 %
± 0.5 %
± 1 %, ± 2 %, ± 5 %
0.1 - 8.6K
0.05 - 8.6K
0.02 - 24.5K
-
-
0.10 - 3.32K
0.1 - 3.27K 0.05 - 3.27K
0.05 - 12.75K
-
-
1.0 - 1.65K
0.1 - 16.69K 0.05 - 16.69K
0.01 - 47.1K
-
-
0.10 - 5.62K
0.1 - 5.54K 0.05 - 5.54K
0.05 - 23.5K
1.0 - 2.8K
-
-
0.1 - 32.99K 0.05 - 32.99K
0.01 - 95.2K
-
-
0.10 - 12.1K
0.1 - 12.8K 0.05 - 12.8K
0.05 - 47.6K
-
-
1.0 - 6.04K
0.1 - 96K
0.05 - 96K
0.01 - 273K
-
-
0 .10 - 39.2K
0.1 - 36.7K 0.05 - 36.7K
0.05 - 136K
-
-
1.0 - 19.6K
0.1 - 90K
0.05 - 90K
0.05 - 90K
-
-
0.05 - 29.4K
0.1 - 37.5K 0.05 - 37.5K
0.05 - 37.5K
-
-
1.0 - 14.7K
0.1 - 116K
0.05 - 116K
0.05 - 116K
-
-
0.10 - 35.7K
0.1 - 48.5K 0.05 - 48.5K
0.05 - 48.5K
-
-
1.0 - 17.4K
WEIGHT
(typical)
g
3
3.3
6
8.8
13
16.5
28
35
350
385
630
690
MILITARY ± 0.05 %, ± 0.1 %
0.5 - 6.75K
7.5 (5)
5
-
0.5 - 2.32K
7.5 (5)
5
-
0.5 - 12.7K
12.5 (10)
10
-
0.5 - 4.45K
12.5 (10)
10
-
0.5 - 25.7K
25
20
-
0.5 - 9.09K
25
20
-
0.5 - 73.4K
50
30
-
0.5 - 26K
50
30
-
0.5 - 90K
100
75
-
0.5 - 37.5K
100
75
-
0.5 - 116K
250
120
-
0.5 - 48.5K
250
120
-
Note
• Figures in parentheses on RH-5 and RH-10 indicate wattage printed on parts, new construction allows these resistors to be rated at higher
wattage but will only be printed with the higher wattage on customer request
GLOBAL PART NUMBER INFORMATION
New Global Part Numbering: RH0054R125FC02 (preferred part number format)
R
H
0
0
5
4
R
1
2
5
F
C
0
2
SPECIAL
(Dash Number)
(up to 3 digits)
From
1 - 999
as applicable
GLOBAL MODEL
RH005
(See “Standard
Electrical
Specifications”
table above for
additional P/N’s)
RH-5
RESISTANCE
VALUE
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
E02
= Lead (Pb)-free, card pack (RH005 - RH050)
E01
= Lead (Pb)-free, skin pack (RH100 and RH250)
Lead (Pb)-free is not available on RE military type
C02
= Tin/lead, card pack (RH005 - RH050)
J01
= Tin/lead, skin pack (RH100 and RH250)
1%
TOLERANCE CODE
Historical Part Number Example: RH-5 4.125
Ω
1 % C02 (will continue to be accepted)
4.125
Ω
RESISTANCE VALUE
C02
PACKAGING
HISTORICAL MODEL
* Pb containing terminations are not RoHS compliant, exemptions may apply
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154
For technical questions, contact: ww2bresistors@vishay.com
Document Number: 30201
Revision: 11-Jul-07
RH, NH
Wirewound Resistors, Military, MIL-PRF-18546 Qualified,
Type RE, Aluminum Housed, Chassis Mount
DIMENSIONS
in inches [millimeters]
RH-5, -10, -25, -50
NH-5, -10, -25, -50
D
C
A
M
N
B
P
K
L
H
J
F
E
G
Vishay Dale
MODEL
DIMENSIONS
in inches [millimeters]
A
B
C
D
E
F
G
H
J
K
L
M
N
P
RH-5
NH-5
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
[2.36
[1.98
[1.27
[6.76
[11.28 [12.45 [15.24 [28.58
[8.48
[16.41
[8.13
[1.65
[3.38
[1.98
± 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]
0.093
0.094
0.102
0.085
0.312
0.562
0.625
0.750
1.375
0.420
0.800
0.390
0.075
0.165
± 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
[14.27 [15.88 [19.05 [34.93 [10.67 [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]
0.172
0.125
0.115
0.085
0.438
0.719
0.781
1.062
1.938
0.550
1.080
0.546
0.075
0.231
± 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
0.844
1.968
2.781
0.630
1.140
0.610
0.088
0.260
0.196
0.125
0.107
0.085
0.438
± 0.005 ± 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
[2.24
[6.60
[4.98
[3.18
[2.72
[2.16
[11.13
[39.67 [21.44 [49.99 [70.64 [16.00 [28.96 [15.49
± 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]
RH-10
NH-10
RH-25
NH-25
RH-50
NH-50
DIMENSIONS
in inches [millimeters]
RH-100, NH-100
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.
RH-250, NH-250
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]
Document Number: 30201
Revision: 11-Jul-07
For technical questions, contact: ww2bresistors@vishay.com
www.vishay.com
155
RH, NH
Vishay Dale
Wirewound Resistors, Military, MIL-PRF-18546 Qualified,
Type RE, Aluminum Housed, Chassis Mount
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature Coefficient
Dielectric Withstanding Voltage
Short Time Overload
Maximum Working Voltage
Insulation Resistance
Terminal Strength
Solderability
Operating Temperature Range
UNIT
ppm/°C
V
AC
-
V
Ω
lb
-
°C
RH RESISTOR CHARACTERISTICS
± 100 for 0.1
Ω
to 0.99
Ω,
± 50 for 1
Ω
to 9.9
Ω,
± 20 for 10
Ω
and above
1000 for RH/5, RH-10 and RH/25, 2000 for RH/50, 4500 for RH/100 and RH/250
5 × rated power for 5 s
(P x
R)
1/2
10 000 MΩ minimum dry, 1000 MΩ minimum after moisture test
5 minimum for RH-5 and RH-10, 10 minimum for all others
MIL-PRF-18546 type - meets requirements of ANSI J-STD-002
- 55 to + 250
POWER RATING
Vishay RH resistor wattage ratings are based on mounting to the following heat sink:
RH-5 and RH-10:
4" x 6" x 2" x 0.040" thick aluminum chassis (129 sq. in. surface area)
RH-25:
5" x 7" x 2" x 0.040" thick aluminum chassis (167 sq. in. surface area)
RH-50:
12" x 12" x 0.059" thick aluminum panel (291 sq. in. surface area)
RH-100 and RH-250:
12" x 12" x 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
RATED POWER IN
%
120
100
80
A
D
60
40
20
0
- 55 - 50
B
C
0
25
50
150
250
Derating
RATED POWER IN
%
AMBIENT TEMPERATURE IN
°
C
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
100
90
80
70
60
50
40
30
20
10
0
A
B
C
0
20
40
60
80
100
Heat Sink Derating
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For technical questions, contact: ww2bresistors@vishay.com
%
OF RECOMMENDED HEAT SINK AREA
Document Number: 30201
Revision: 11-Jul-07
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 and
Lead (Pb)-free is Ni/Pd/Au, finish is on copper clad steel core
terminal. For RH-100 and RH-250 terminals are threaded
stainless steel.
Note:
Military (RE) parts are only available with tin/lead finish
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.
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).
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 RH-5, RH-10 and RH-25; 2000 V
rms
for RH-50
4500 V
rms
for RH-100 and RH-250; 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 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 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
TEST LIMITS
± (0.5 % + 0.05
Ω) ΔR
± (0.5 % + 0.05
Ω) ΔR
± (0.2 % + 0.05
Ω) ΔR
± (0.5 % + 0.05
Ω) ΔR
± (1.0 % + 0.05
Ω) ΔR
± (0.2 % + 0.05
Ω) ΔR
± (0.2 % + 0.05
Ω) ΔR
± (1.0 % + 0.05
Ω) ΔR
± (0.2 % + 0.05
Ω) ΔR
Document Number: 30201
Revision: 11-Jul-07
For technical questions, contact: ww2bresistors@vishay.com
www.vishay.com
157
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
Revision: 18-Jul-08
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