RPS 500
www.vishay.com
Vishay Sfernice
Power Resistor for Mounting Onto a Heatsink
Thick Film Technology
FEATURES
• Compliant with requirement #26 of
NF-EN45545-2
• High power rating: 500 W
• High overload capability up to 2 times rated power
(see Energy Curve)
• Heatsink mounting
• Low thermal radiation of the case
LINKS TO ADDITIONAL RESOURCES
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
3D 3D
3D Models
This range has been developed specifically for electrical traction applications and is capable of dissipating 500 W at +70 °C.
The remarkable performance characteristics are evident when used in severe pulse conditions. The copper base allows easy
mounting on the heatsink and provides optimal dissipation conditions.
DIMENSIONS in millimeters
RPS 500D
RPS 500A
73
56
10.5
73
56
10.5
6
26 ± 1
33.5
16.2
6
28 ± 1
57
57
18.7
60
Ø 7.2
60
Ø 7.2
35.8
Ø 4.2
2 x M4
useful depth: 6
Ø 21
38.1
Ø 4.2
2 x M4
useful depth: 6
Ø 21
Note
• Tolerances unless stated: ± 0.2 mm
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
SIZE
RPS 500
Note
(1) E24 series
500
RESISTANCE
RANGE
Ω
0.24 to 1M (1)
RATED POWER
P25 °C
W
500
MECHANICAL SPECIFICATIONS
Flammability
Resistive Element
Substrate
End Connections
Weight
Tightening Torque on
Connections
Tightening Torque on Heatsink
Flammability
Revision: 17-Oct-2022
TOLERANCE
±%
1, 2, 5, 10
TEMPERATURE
COEFFICIENT
± ppm/°C
150
TECHNICAL SPECIFICATIONS
Insulated case and resin
for potting UL 94 V-0
Cermet
Alumina onto base of
nickel coated copper
Screws M4 (M5 on request)
250 g ± 10 %
Rated Power (P70)
Chassis Mounted at 70 °C
(Case Temperature)
500 W continuous load
Thermal Resistance of the
Component
Rth (j - c): 0.11 °C/W
Temperature Coefficient
2 Nm
4 Nm
ENVIRONMENTAL SPECIFICATIONS
Temperature Range
LIMITING ELEMENT
VOLTAGE UL
V
5000
-55 °C to +125 °C
IEC 60695-11-5
Application time: ta = 10 s
Burning duration: tb < 30 s
Dielectric Strength
Insulation Resistance
Inductance
± 300 ppm/°C < 1 Ω
± 150 ppm/°C > 1 Ω
L: 7 kVRMS - H: 12 kVRMS
MIL STD 202 Method 301:
1 min/10 mA max.
> 106 MΩ under Uins = 500 VDC
IEC 60115-1
< 50 nH
Document Number: 50047
1
For technical questions, contact: sferfixedresistors@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
RPS 500
www.vishay.com
Vishay Sfernice
PERFORMANCE
TESTS
CONDITIONS
REQUIREMENTS
EN 60115-1
2 Pr / 10 s
UL = 5000 V
< ± (0.25 % + 0.05 Ω)
IEC 60115-1 / IEC60068-2-14 Test Na
5 cycles, -55 °C to +125 °C
< ± (0.25 % + 0.05 Ω)
IEC 60115-1
Pr (i.e. 500 W) / 1000 h / 70 °C (no cycling) (1)
< ± (0.5 % + 0.05 Ω)
MIL STD 202 Method 103 B and D
56 days, 95 % RH / 40 °C
< ± (0.5 % + 0.05 Ω)
Momentary Overload
Rapid Temperature Change
Load Life
Humidity (Steady State)
Note
(1) Resistors are not tested and guaranteed in cycling conditions
RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR
1Ω
Standard Tolerances
±5%
Standard TCR (-55 °C to +125 °C)
± 300 ppm/°C
Tolerance on Request
± 150 ppm/°C
± 1 %, ± 2 %, 10 %
RECOMMENDATIONS FOR MOUNTING ONTO A HEATSINK
• Surfaces in contact must be carefully cleaned.
• The heatsink must have an acceptable flatness: From 0.05 mm to 0.1 mm/100 mm.
• Roughness of the heatsink must be around 6.3 μm. In order to improve thermal conductivity, surfaces in contact (alumina,
heatsink) are coated with a silicone grease (type Sl 340 from Rhône-Poulenc or Dow 340 from Dow Corning).
• The fastening of the resistor to the heatsink is under pressure control of two screws tightened at 4 Nm for full power
availability.
RPS 500
Tightening Torque on Heatsink
4 Nm
• The following accessories are supplied with each product: 2 off CHC M4 x 16/16 class 8.8 for heatsink mounting,
2 off TH M4 x 6/6 and 2 M4 contact lock washers for connections.
CHOICE OF THE HEATSINK
The user must choose according to the working conditions of the component (power, room temperature).
Maximum working temperature must not exceed 125 °C.
The dissipated power is simply calculated by the following ratio:
ΔT
P = ----------------------------------------------------------------------------------------------------[ R th (j - c) ] + [ R th (c - h) ] + [ R th (h - a) ]
P:
Expressed in W
ΔT:
Difference between maximum working temperature and room temperature
Rth (j - c):
Thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal
resistance of the component: 0.11 °C/W.
Rth (c - h): Thermal resistance value measured between outer side of the resistor and upper side of the heatsink. This is the
thermal resistance of the interface (grease, thermal pad), and the quality of the fastening device.
Rth (h - a): Thermal resistance of the heatsink.
Revision: 17-Oct-2022
Document Number: 50047
2
For technical questions, contact: sferfixedresistors@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
RPS 500
www.vishay.com
Vishay Sfernice
OVERLOADS
POWER RATING
Short time overload: 2 Pr/10 s
Accidental overload: The values indicated in the graph
below are applicable to resistors in air or mounted onto a
heatsink.
The heatsink temperature should be maintained at the
values specified in fig. 2.
To optimize the thermal conduction, contacting surfaces
should be coated with silicone grease and heatsink
mounting screws tightened to 4 Nm.
MARKING
100
RATED POWER IN %
Model, style, resistance value (in Ω), tolerance (in %),
manufacturing date, Vishay Sfernice trademark.
ENERGY CURVE
ENERGY IN JOULES
10 000
1000
100
80
60
40
20
10
0
0
1
20
40
60
80
100
120
140
HEATSINK TEMPERATURE IN °C
0.1
10-7
10-6
10-5
10-4
10-3
10-2
10-1
100
PACKAGING
OVERLOAD DURATION IN s
Box of 15 units
POWER CURVE
10 000 000
POWER IN W
1 000 000
100 000
10 000
1000
10-7
10-6
10-5
10-4
10-3
10-2
10-1
100
OVERLOAD DURATION IN s
Revision: 17-Oct-2022
Document Number: 50047
3
For technical questions, contact: sferfixedresistors@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
RPS 500
www.vishay.com
Vishay Sfernice
ORDERING INFORMATION
RPS
500
DH
100 kΩ
± 10 %
xxx
BO15
e
MODEL
STYLE
CONNECTIONS
optional
H: dielectric
strength 12 kV
L: dielectric
strength 7 kV
RESISTANCE VALUE
TOLERANCE
CUSTOM DESIGN
optional
on request:
special TCR,
shape etc.
PACKAGING
LEAD (Pb)-FREE
±1%
±2%
±5%
± 10 %
GLOBAL PART NUMBER INFORMATION
R
GLOBAL
MODEL
RPS0500
P
S
0
5
0
0
D
H
4
7
R
0
J
B
STYLE
DIELECTRIC
OHMIC VALUE
TOLERANCE
PACKAGING
SPECIAL
D = diagonal
connections
A = straight
connections
H: dielectric
strength 12 kV
L: dielectric
strength 7 kV
The first four digits are
significant figures and the
last digit specifies the
number of zeros to follow.
R designates decimal point.
48R7 = 48.7 Ω
47R0 = 47 Ω
1001 = 1 kΩ
4R70 = 4.7 Ω
R240 = 0.24 Ω
F=1%
G=2%
J=5%
K = 10 %
B = box 15 pieces
N = box 15 pieces
N/A (1 to 14 pieces
by box)
As applicable
ZAx.
RELATED DOCUMENTS
APPLICATION NOTES
Potentiometers and Trimmers
www.vishay.com/doc?51001
Guidelines for Vishay Sfernice Resistive and Inductive Components
www.vishay.com/doc?52029
Revision: 17-Oct-2022
Document Number: 50047
4
For technical questions, contact: sferfixedresistors@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
www.vishay.com
Vishay
Disclaimer
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Revision: 01-Jan-2023
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Document Number: 91000
