RH, NH
Vishay Dale
Wirewound Resistors, Military, MIL-PRF-18546 Qualified,
Type RE, Aluminum Housed, Chassis Mount
FEATURES
•
Molded construction for total environmental
•
•
•
•
•
protection
Pb-free
Available
Complete welded construction
Meets applicable requirements of
e4
MIL-PRF-18546
Available in non-inductive styles (type NH) with
Aryton-Perry winding for lowest reactive
RoHS*
COMPLIANT
components
Mounts on chassis to utilize heat-sink effect
Excellent stability in operation (< 1 % change in resistance)
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL HISTORICAL MIL-PRF-
18546
MODEL
MODEL
TYPE
POWER RATING
P
25 °C
W
DALE
RESISTANCE RANGE
MIL. RANGE SHOWN IN BOLD FACE
Ω
WEIGHT
(Typical)
g
MILITARY ± 0.05 %, ± 0.1 % ± 0.25 %
± 0.5 %
± 1 %, ± 2 %, ± 5 %
-
0.5 - 6.75K
0.1 - 8.6K
0.05 - 8.6K
0.02 - 24.5K
RH005
RH-5
7.5 (5)
5
3
RE60G
-
-
-
0.10 - 3.32K
-
0.5 - 2.32K
0.1 - 3.27K 0.05 - 3.27K
0.05 - 12.75K
7.5 (5)
5
3.3
NH005
NH-5
RE60N
-
-
-
1.0 - 1.65K
-
0.5 - 12.7K
0.1 - 16.69K 0.05 - 16.69K
0.01 - 47.1K
RH010
RH-10
12.5 (10)
10
6
RE65G
-
-
-
0.10 - 5.62K
-
0.5 - 4.45K
0.1 - 5.54K 0.05 - 5.54K
0.05 - 23.5K
12.5 (10)
10
8.8
NH010
NH-10
RE65N
-
-
-
1.0 - 2.8K
-
0.5 - 25.7K
0.1 - 32.99K 0.05 - 32.99K
0.01 - 95.2K
RH025
RH-25
25
20
13
RE70G
-
-
-
0.10 - 12.1K
-
0.5 - 9.09K
0.1 - 12.8K 0.05 - 12.8K
0.05 - 47.6K
NH025
NH-25
25
20
16.5
RE70N
-
-
-
1.0 - 6.04K
-
0.5 - 73.4K
0.1 - 96K
0.05 - 96K
0.01 - 273K
50
30
28
RH050
RH-50
RE75G
-
-
-
0 .10 - 39.2K
-
0.5 - 26K
0.1 - 36.7K 0.05 - 36.7K
0.05 - 136K
NH050
NH-50
50
30
35
RE75N
-
-
-
1.0 - 19.6K
-
0.5 - 90K
0.1 - 90K
0.05 - 90K
0.05 - 90K
RH100
RH-100
100
75
350
RE77G
-
-
-
0.05 - 29.4K
-
0.5 - 37.5K
0.1 - 37.5K 0.05 - 37.5K
0.05 - 37.5K
100
75
385
NH100
NH-100
RE77N
-
-
-
1.0 - 14.7K
-
0.5 - 116K
0.1 - 116K
0.05 - 116K
0.05 - 116K
RH250
RH-250
250
120
630
RE80G
-
-
-
0.10 - 35.7K
-
0.5 - 48.5K
0.1 - 48.5K 0.05 - 48.5K
0.05 - 48.5K
NH250
NH-250
250
120
690
RE80N
-
-
-
1.0 - 17.4K
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 & 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)
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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Document Number: 30201
Revision: 11-Jul-07
RH, NH
Wirewound Resistors, Military, MIL-PRF-18546 Qualified,
Type RE, Aluminum Housed, Chassis Mount
DIMENSIONS
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 millimeters [inches]
A
B
C
D
E
F
G
H
J
K
L
M
N
P
RH-5
NH-5
11.28
12.45
15.24
± 0.127 ± 0.127 ± 0.7871
[0.444 [0.490 [0.600
± 0.005] ± 0.005] ± 0.03]
28.58
8.48
16.41
8.13
1.65
3.38
1.98
2.36
1.98
1.27
6.76
± 1.57 ± 0.381 ± 0.381 ± 0.381 ± 0.254 ± 0.254 ± 0.254 ± 0.127 ± 0.381 ± 0.127 ± 1.57
[1.125 [0.334 [0.646 [0.320 [0.065 [0.133 [0.078 [0.093 [0.078 [0.050 [0.266
± 0.062] ± 0.015] ± 0.015] ± 0.015] ± 0.010] ± 0.010] ± 0.010] ± 0.005] ± 0.015] ± 0.005] ± 0.062]
RH-10
NH-10
2.36
2.39
2.59
2.16
7.92
14.27
15.88
19.05
34.93
10.67
20.32
9.91
1.91
4.19
± 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
[0.562 [0.625 [0.750 [1.375 [0.420 [0.800 [0.390 [0.075 [0.165 [0.093 [0.094 [0.102 [0.085 [0.312
± 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]
4.37
3.18
2.92
2.16
11.13
18.26
19.84
26.97
49.23
13.97
27.43
13.87
1.91
5.87
± 0.127 ± 0.127 ± 0.787 ± 1.57 ± .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]
4.98
3.18
2.72
2.16
11.13
39.67
21.44
49.99
70.64
16.00
28.96
15.49
2.24
6.60
± 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]
RH-25
NH-25
RH-50
NH-50
DIMENSIONS
RH-100, NH-100
Nickel Plated
Brass Nut
Stainless Steel Stud
88.90
± 0.787
[3.50 ± 0.031]
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]
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]
25.12 ± 0.787
[0.989 ± 0.031]
44.45 ± 0.787
[1.75 ± 0.031]
46.02 ± 0.787
[1.812 ± 0.031]
71.42 ± 0.787
[2.812 ± 0.031]
12 - 24
UNC-2A
Thd. Typ.
4.78 ± 0.787
[0.188 ± 0.031]
Typ.
19.56 ± 0.381
[0.770 ± 0.015]
RH-250, NH-250
Nickel Plated
Brass Nut
Stainless Steel Stud
1/4 - 20
UNC-2A Thd. Typ.
53.98 ± 0.787
[2.125 ± 0.031]
76.20 ± 0.787
[3.0 ± 0.031]
31.75 ± 1.575
[1.25 ± 0.062]
63.50 ± 0.254
[2.50 ± 0.010]
22.23 ± 0.254
[0.875 ± 0.010]
76.20 ± 0.254
[3.0 ± 0.010]
98.42 ± 0.254
[3.875 ± 0.010]
177.80 ± 2.36 [7.0 ± 0.093]
31.75 ± 1.575
[1.25 ± 0.062]
6.35 ± 0.787
[0.250 ± 0.031
Typ.]
55.58 ± 0.787
[2.188 ± 0.031]
7.92 ± 0.787
[0.312 ± 0.031]
24.26 ± 0.381
[0.955 ± 0.015]
Document Number: 30201
Revision: 11-Jul-07
For technical questions, contact: ww2bresistors@vishay.com
www.vishay.com
167
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 seconds
(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/+ 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
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 & 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
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.
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
TEST LIMITS
Rated power applied until thermally stable, then a minimum of 15 minutes at - 55 °C ± (0.5 % + 0.05
Ω) ΔR
5 × rated power for 5 seconds
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 one minute
250 °C for 2 hours
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 hours each
1000 hours at rated power, + 25 °C, 1.5 hours “ON”, 0.5 hours “OFF”
± (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
30 second, 5 pound pull test for RH-5 and RH-10, 10 pound pull test for other sizes,
± (0.2 % + 0.05
Ω) ΔR
torque test - 24 pound inch for RH-100 and 32 pound inch for RH-250
Document Number: 30201
Revision: 11-Jul-07
For technical questions, contact: ww2bresistors@vishay.com
www.vishay.com
169
