RPS 500
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Revision: 16-Nov-17 1Document Number: 50047
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
Power Resistor for Mounting onto a Heatsink
Thick Film Technology
DESIGN SUPPORT TOOLS
FEATURES
• 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
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
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.
Note
• Tolerances unless stated: ± 0.2 mm
Note
(1) E24 series
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Available
Models
DIMENSIONS in millimeters
STANDARD ELECTRICAL SPECIFICATIONS
MODEL SIZE
RESISTANCE
RANGE
RATED POWER
P25 °C
W
LIMITING ELEMENT
VOLTAGE UL
V
TOLERANCE
± %
TEMPERATURE
COEFFICIENT
± ppm/°C
RPS 500 500 0.24 to 1M (1) 500 5000 1, 2, 5, 10 150
RPS 500D RPS 500A
73
56
57
Ø 7.2
Ø 4.2
2 x M4
useful depth: 6
10.5
28 ± 1
Ø 21
60
6
38.1
73
56
57
33.5
Ø 7.2
Ø 4.2
2 x M4
useful depth: 6
10.5
26 ± 1
Ø 21
60
6
35.8
16.2 18.7
MECHANICAL SPECIFICATIONS
Mechanical Protection Insulated case and resin for
potting UL 94 V-0
Resistive Element Cermet
Substrate Alumina onto base of nickel
coated copper
End Connections Screws M4 (M5 on request)
Weight 250 g ± 10 %
Tightening Torque on
Connections 2 Nm
Tightening Torque on Heatsink 4 Nm
ENVIRONMENTAL SPECIFICATIONS
Temperature Range -55 °C to +125 °C
Flammability IEC 60695-11-5
2 applications 30 s
separated by 60 s
TECHNICAL SPECIFICATIONS
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 ± 300 ppm/°C < 1
± 150 ppm/°C > 1
Dielectric Strength
L: 7 kVRMS - H: 12 kVRMS
MIL STD 202 Method 301:
1 min/10 mA max.
Insulation Resistance > 106 M under Uins = 500 VDC
IEC 60115-1
Inductance 50 nH
RPS 500
www.vishay.com Vishay Sfernice
Revision: 16-Nov-17 2Document Number: 50047
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
Note
(1) Resistors are not tested and guaranteed in cycling conditions
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.
• 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:
P: Expressed in W
T: 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.
PERFORMANCE
TESTS CONDITIONS REQUIREMENTS
Momentary Overload
EN 60115-1
2 Pr / 10 s
UL = 5000 V
< ± (0.25 % + 0.05 )
Rapid Temperature Change IEC 60115-1 / IEC60068-2-14 Test Na
5 cycles, -55 °C to +125 °C < ± (0.25 % + 0.05 )
Load Life IEC 60115-1
Pr (i.e. 500 W) / 1000 h / 70 °C (no cycling) (1) < ± (0.5 % + 0.05 )
Humidity (Steady State) MIL STD 202 Method 103 B and D
56 days, 95 % RH / 40 °C < ± (0.5 % + 0.05 )
RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR
Resistance Values 1 1
Standard Tolerances ± 5 %
Standard TCR (-55 °C to +125 °C) ± 300 ppm/°C ± 150 ppm/°C
Tolerance on Request ± 1 %, ± 2 %, 10 %
Tightening Torque on Heatsink RPS 500
4 Nm
PT
Rth (j - c)
Rth (c - h)
Rth (h - a)
++
-----------------------------------------------------------------------------------------------------=
RPS 500
www.vishay.com Vishay Sfernice
Revision: 16-Nov-17 3Document Number: 50047
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
OVERLOADS
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.
MARKING
Model, style, resistance value (in ), tolerance (in %),
manufacturing date, Vishay Sfernice trademark.
ENERGY CURVE
POWER CURVE
POWER RATING
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.
OVERLOAD DURATION IN s
10-7 10-6 10-5 10-4 10-3 10-2 100
10-1
ENERGY IN JOULES
0.1
1
10
100
10 000
1000
POWER IN W
OVERLOAD DURATION IN s
1000
10 000
100 000
1 000 000
10 000 000
10-7 10-6 10-5 10-4 10-3 10-2 100
10-1
PACKAGING
Box of 15 units
RATED POWER IN %
0 20 40 60 80 100 120 140
HEATSINK TEMPERATURE IN °C
0
20
40
60
80
100
RPS 500
www.vishay.com Vishay Sfernice
Revision: 16-Nov-17 4Document Number: 50047
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
ORDERING INFORMATION
RPS 500 DH 100 k± 10 % xxx BO15 e
MODEL STYLE CONNECTIONS
optional
H: dielectric
strength 12 kV
L: dielectric
strength 7 kV
RESISTANCE VALUE TOLERANCE
± 1 %
± 2 %
± 5 %
± 10 %
CUSTOM DESIGN
optional
on request:
special TCR,
shape etc.
PACKAGING LEAD (Pb)-FREE
GLOBAL PART NUMBER INFORMATION
GLOBAL
MODEL STYLE DIELECTRIC OHMIC VALUE TOLERANCE PACKAGING SPECIAL
RPS500 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.
48R70 = 48.7
47R0 = 47
1001 = 1 k
4R70 = 4.7
R240 = 0.24
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
0500DH4 R JP SR 70B
Legal Disclaimer Notice
www.vishay.com Vishay
Revision: 08-Feb-17 1Document Number: 91000
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