Preliminary
RHA
www.vishay.com
Vishay Dale
Pre-Charge and Discharge,
Chassis Mount Wirewound Resistor
FEATURES
• AEC-Q200 qualified
• Molded construction for total environmental
protection
Available
• Complete welded construction
• Mounts on chassis to utilize heat-sink effect
Available
• Excellent stability in operation
(< 1 % change in resistance)
• Material categorization:
for definitions of compliance please see
www.vishay.com/doc?99912
LINKS TO ADDITIONAL RESOURCES
3D 3D
Available
Available
3D Models
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
POWER RATING
P25 °C
W
RESISTANCE RANGE
Ω
± 1 %, ± 3 %, ± 5 %
WEIGHT
(typical)
g
RHA005
7.5
0.1 to 3.32K
3
RHA010
12.5
0.1 to 5.62K
5
RHA025
25
0.1 to 12.1K
12
RHA050
50
0.1 to 39.2K
28
GLOBAL MODEL
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
RHA RESISTOR CHARACTERISTICS
ppm/°C
± 20 for 10 Ω and above; ± 50 for 1 Ω to 9.9 Ω, ± 100 for 0.1 Ω to 0.99 Ω
Maximum Working Voltage
V
(P x R)1/2
Insulation Resistance
Ω
10 000 MΩ minimum dry, 1000 MΩ minimum after moisture test
Solderability
-
Meets requirements of ANSI J-STD-002
°C
-55 to +250
Temperature Coefficient
Operating Temperature Range
GLOBAL PART NUMBER INFORMATION
Global Part Numbering Example: RHA0054R125FC02
R
H
A
0
0
5
4
R
1
2
5
F
C
0
2
GLOBAL MODEL
RESISTANCE VALUE
TOLERANCE CODE
PACKAGING
SPECIAL
RHA005
(see Standard
Electrical
Specifications
Global Model
column for
options)
R = decimal
K = thousand
15R00 = 15 Ω
10K00 = 10 kΩ
F = 1.0 %
H = 3.0 %
J = 5.0 %
E02 = lead (Pb)-free, card pack
(dash number)
(up to 2 digits)
from 1 to 99
as applicable
Revision: 02-Mar-2021
Document Number: 30406
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
Preliminary
RHA
www.vishay.com
Vishay Dale
DIMENSIONS in inches [millimeters]
D
C
A
F
E
M
N
G
J
B
P
H
L
K
DIMENSIONS in inches [millimeters]
GLOBAL
MODEL
A
B
C
D
E
F
G
H
J
K
L
M
N
P
RHA005
0.266
0.050
0.078
0.093
0.078
0.133
0.065
0.320
0.646
0.334
1.125
0.600
0.490
0.444
± 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
[6.76
[1.27
[1.98
[2.36
[1.98
[3.38
[1.65
[8.13
[16.41
[8.48
[11.28 [12.45 [15.24 [28.58
± 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]
RHA010
0.800
0.390
0.075
0.165
0.093
0.094
0.102
0.085
0.312
0.420
1.375
0.750
0.625
0.562
± 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
[2.59
[2.16
[7.92
[2.36
[2.39
± 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]
RHA025
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]
RHA050
1.968
2.781
0.630
1.140
1.562
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
[39.67 [21.44 [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]
POWER RATING
Vishay RH resistor wattage ratings are based on mounting to the following heat sink:
RHA005 and RHA010: 4" x 6" x 2" x 0.040" thick aluminum chassis (129 sq. in. surface area)
RHA025:
5" x 7" x 2" x 0.040" thick aluminum chassis (167 sq. in. surface area)
RHA050:
12" x 12" x 0.059" thick aluminum panel (291 sq. in. surface area)
FREE AIR POWER RATING
GLOBAL MODEL
W at 25 °C
Revision: 02-Mar-2021
RHA005
RHA010
RHA025
RHA050
4.5
7.5
12.5
20
Document Number: 30406
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
Preliminary
RHA
www.vishay.com
Vishay Dale
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 = RHA005 and RHA010 size resistor, unmounted
B = RHA025 size resistor, unmounted
C = RHA050 size resistor, unmounted
RATED POWER IN %
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
Derating is also required when recommended heat sink area is reduced.
A = RHA005 and RHA010 size resistor
B = RHA025 size resistor
RATED POWER IN %
C = RHA050 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: 02-Mar-2021
Document Number: 30406
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
Preliminary
RHA
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 RHA005 through RHA050 size
terminal finish - lead (Pb)-free is Ni/Pd/Au, finish is on
copper clad steel core terminal
• Threaded mounting holes
• Preconditioning and other additional testing
Part Marking: Dale, model, wattage, value, tolerance, date
code
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
5 x rated power for 5 s
± (0.5 % + 0.05 Ω) ΔR
Dielectric
Withstanding Voltage
1000 VRMS for RHA005, RHA010, and RHA025; 2000 VRMS for RHA050
± (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 RHA005 and RHA010, 10 pound pull test for other sizes
± (0.2 % + 0.05 Ω) ΔR
SHORT TERM ENERGY CAPABILITIES VS. RESISTANCE
SHORT TERM (< 100 ms) ENERGY CAPABILITY (J)
RESISTANCE VALUE
(Ω)
RHA005
RHA010
RHA025
RHA050
1
4.15
14.5
14.5
17.4
10
2.59
6.53
17
67.6
25
1.56
4.25
10.2
42.5
50
1.97
3.11
5.85
32.65
100
0.71
3.93
6.22
25.9
300
1.179
2.63
6.9
18.66
1000
0.59
1.44
3.93
14.2
Note
• Contact factory for energy capability of resistance values not listed
Revision: 02-Mar-2021
Document Number: 30406
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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