RPS 500
www.vishay.com
Vishay Sfernice
Power Resistor for Mounting onto a Heatsink
Thick Film Technology
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
DESIGN SUPPORT TOOLS
Models
Available
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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
73
56
RPS 500A
73
56
10.5
26 ± 1
16.2
6
57
33.5
Ø 7.2
28 ± 1
18.7
10.5
6
57
Ø 7.2
60
35.8
2 x M4
useful depth: 6
Ø 21
Ø 4.2
38.1
2 x M4
useful depth: 6
60
Ø 4.2
Ø 21
Note
• Tolerances unless stated: ± 0.2 mm
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
RPS 500
Note
(1)
E24 series
SIZE
500
RESISTANCE
RANGE
0.24 to 1M
(1)
RATED POWER
P
25 °C
W
500
LIMITING ELEMENT
VOLTAGE
U
L
V
5000
TOLERANCE
±%
1, 2, 5, 10
TEMPERATURE
COEFFICIENT
± ppm/°C
150
MECHANICAL SPECIFICATIONS
Mechanical Protection
Resistive Element
Substrate
End Connections
Weight
Tightening Torque on
Connections
Tightening Torque on Heatsink
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 %
2 Nm
4 Nm
TECHNICAL SPECIFICATIONS
Rated Power (P
70
)
Chassis Mounted at 70 °C
(Case Temperature)
Thermal Resistance of the
Component
Temperature Coefficient
500 W continuous load
R
th (j - c)
: 0.11 °C/W
± 300 ppm/°C < 1
± 150 ppm/°C > 1
L: 7 kV
RMS
- H: 12 kV
RMS
MIL STD 202 Method 301:
1 min/10 mA max.
> 10
6
M under
U
ins
= 500 V
DC
IEC 60115-1
50 nH
Dielectric Strength
ENVIRONMENTAL SPECIFICATIONS
Temperature Range
Flammability
Revision: 16-Nov-17
-55 °C to +125 °C
IEC 60695-11-5
2 applications 30 s
separated by 60 s
Insulation Resistance
Inductance
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
CONDITIONS
EN 60115-1
2 Pr / 10 s
U
L
= 5000 V
IEC 60115-1 / IEC60068-2-14 Test Na
5 cycles, -55 °C to +125 °C
IEC 60115-1
Pr (i.e. 500 W) / 1000 h / 70 °C (no cycling)
(1)
MIL STD 202 Method 103 B and D
56 days, 95 % RH / 40 °C
REQUIREMENTS
< ± (0.25 % + 0.05
)
< ± (0.25 % + 0.05
)
< ± (0.5 % + 0.05
)
< ± (0.5 % + 0.05
)
PERFORMANCE
TESTS
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
Resistance Values
Standard Tolerances
Standard TCR (-55 °C to +125 °C)
Tolerance on Request
± 300 ppm/°C
± 1 %, ± 2 %, 10 %
1
±5%
± 150 ppm/°C
1
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.
Tightening Torque on Heatsink
RPS 500
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:
T
-
P =
----------------------------------------------------------------------------------------------------
R
th (j - c)
+
R
th (c - h)
+
R
th (h - a)
P:
T:
R
th (j - c)
:
Expressed in W
Difference between maximum working temperature and room temperature
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.
R
th (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.
R
th (h - a)
: Thermal resistance of the heatsink.
Revision: 16-Nov-17
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
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.
Vishay Sfernice
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.
100
MARKING
Model, style, resistance value (in
),
tolerance (in %),
manufacturing date, Vishay Sfernice trademark.
RATED POWER IN %
80
ENERGY CURVE
10 000
60
ENERGY IN JOULES
1000
40
100
20
10
0
0
20
40
60
80
100
120
140
1
HEATSINK TEMPERATURE IN °C
0.1
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
OVERLOAD DURATION IN s
PACKAGING
Box of 15 units
POWER CURVE
10 000 000
1 000 000
POWER IN W
100 000
10 000
1000
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
OVERLOAD DURATION IN s
Revision: 16-Nov-17
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
100 k
RESISTANCE VALUE
± 10 %
TOLERANCE
±1%
±2%
±5%
± 10 %
xxx
CUSTOM DESIGN
optional
on request:
special TCR,
shape etc.
BO15
PACKAGING
e
LEAD (Pb)-FREE
ORDERING INFORMATION
RPS
MODEL
500
STYLE
DH
CONNECTIONS
optional
H:
dielectric
strength 12 kV
L:
dielectric
strength 7 kV
GLOBAL PART NUMBER INFORMATION
R
P
S
0
5
0
0
D
H
4
7
R
0
J
B
GLOBAL
MODEL
RPS500
STYLE
D
= diagonal
connections
A
= straight
connections
DIELECTRIC
H:
dielectric
strength 12 kV
L:
dielectric
strength 7 kV
OHMIC VALUE
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
TOLERANCE
F
=1%
G
=2%
J
=5%
K
= 10 %
PACKAGING
B
= box 15 pieces
N
= box 15 pieces
N/A (1 to 14 pieces
by box)
SPECIAL
As applicable
ZAx.
RELATED DOCUMENTS
APPLICATION NOTES
Potentiometers and Trimmers
Guidelines for Vishay Sfernice Resistive and Inductive Components
www.vishay.com/doc?51001
www.vishay.com/doc?52029
Revision: 16-Nov-17
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
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
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 in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding
statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular application.
Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over
time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk.
Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
such applications.
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. Product names and markings noted herein may be trademarks of their respective owners.
© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
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