RPH 100
www.vishay.com
Vishay Sfernice
Power Resistor for Mounting onto a Heatsink
Thick Film Technology
FEATURES
• High power rating
• Low thermal radiation of the case
• Wide ohmic value range
• Easy mounting
• High overload capabilities
• Reduced size and weight
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
DESIGN SUPPORT TOOLS
Models
Available
click logo to get started
This new style has been developed as an extension to RCH range. Through the use of thick film technology, a non-inductive
solution for power resistors is available which are rated up to 100 W at +25 °C. The terminations position prevents any risk of
an electrical arc to the heatsink. This resistor series can replace and offer advantages to standard wirewound devices.
DIMENSIONS
in millimeters
65.2 ± 0.4
35
V Connections
42.4 ± 0.5
Ø 4.2
4 16.6 18.5 ± 0.4
21.15 ± 0.7
Ø 4.2
25.6 ± 0.4 37 46.7
Note
• Tolerances unless stated: ± 0.2 mm
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
RPH 100
Note
(1)
E24 series
SIZE
100
RESISTANCE
RANGE
0.092 to 1M
(1)
RATED POWER
P
25 °C
W
100
LIMITING ELEMENT
VOLTAGE
U
L
V
1900
TOLERANCE
±%
1, 2, 5, 10
TEMPERATURE
COEFFICIENT
± ppm/°C
150
MECHANICAL SPECIFICATIONS
Mechanical Protection
Resistive Element
Substrate
End Connections
Tightening Torque
Connections
Tightening Torque Heatsink
Weight
Insulated case UL 94 V-0
Cermet
Alumina on metallic base of
nickel coated aluminum
V connections: Screws M4 x 6
1 Nm
3 Nm
60 g ± 10 %
TECHNICAL SPECIFICATIONS
Continuous
Power Rating
Temperature
Coefficient
Momentary
Standard
100 W at 25 °C
chassis mounted 0.45 °C/W
10 W at 25 °C free air
± 300 ppm/°C < 1
± 150 ppm/°C > 1
0.55 °C/W
5 kV
RMS
, 1 min,
10 mA max.
10
6
M
0.1 μH
Thermal Resistance
Dielectric Strength
MIL STD 202
Insulation Resistance
ENVIRONMENTAL SPECIFICATIONS
Thermal Resistance
Temperature Range
Climatic Category
Revision: 16-Nov-17
R
th (j - c)
0.55 °C/W
-55 °C to +125 °C
55 / 125 / 56
Inductance
Document Number: 50046
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
RPH 100
www.vishay.com
Vishay Sfernice
CONDITIONS
NF EN 140 000 CEI 115_1
4 Pr / 5 s
U
S
< 2
U
L
NF EN 140000 CEI 68214 Test Na
5 cycles, -55 °C, +125 °C
NF EN 140 000
Pr at 25 °C, 1000 h
MIL STD 202 Method 103 B Test D
56 days, 95 % RH
REQUIREMENTS
< ± (0.25 % + 0.05
)
< ± (0.25 % + 0.05
)
< ± (0.5 % + 0.05
)
< ± (0.5 % + 0.05
)
PERFORMANCE
TESTS
Short Time Overload
Rapid Temperature Change
Load Life
(Chassis Mounted 0.45 °C/W)
Humidity (Steady State)
RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR
Ohmic Value
Standard Tolerance
Standard TCR
Tolerance On Request
<1
±5%
± 300 ppm/°C
± 1 % to ± 2 %
>1
±5%
± 150 ppm/°C
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) should be coated with a silicone grease (type SI 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 (not supplied).
Tightening Torque on Heatsink
RPH 100
3 Nm
• In order to improve the dissipation, either forced-air cooling or liquid cooling may be used.
• Do not forget to respect an insulation value between two resistors (dielectric strength in dry air 1 kV/mm).
CHOICE OF THE HEATSINK
The user must choose the heatsink 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)
:
R
TH (c - h)
:
R
TH (h - a)
:
Example:
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: 0.55 °C/W.
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.
Thermal resistance of the heatsink.
R
TH (c - a)
for RPH 100 power rating 80 W at ambient temperature +40 °C.
T
125 °C - 40 °C
85 °C
R
TH (j - c)
+ R
TH (c - h)
+ R
TH (h - a)
=
------
=
----
= 1.06 °C/W
-
-
R
TH (c - h)
+ R
TH (h - a)
1.06°C/W - 0.55 °C/W
0.51 °C/W
T
P
85
80
Revision: 16-Nov-17
Document Number: 50046
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
RPH 100
www.vishay.com
OVERLOADS
In any case the applied voltage must be lower than 2
U
n
.
U
max.
< 2
U
n
< 3800 V.
Short time overload:
4 x Pr/5 s
Accidental overload:
The values indicated on the following
graph are applicable to resistors in air or mounted onto a
heatsink.
Vishay Sfernice
POWER RATING
For resistor mounted onto a heatsink with thermal
resistance of 0.45 °C/W.
100
RATED POWER IN %
80
60
MARKING
Series, style, ohmic value (in
),
tolerance (in %),
manufacturing date, Vishay Sfernice trademark.
40
20
ENERGY CURVE
1000
0
0
20
40
60
80
100
120
140
ENERGY IN JOULES
AMBIENT TEMPERATURE IN °C
100
10
1
0.1
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
OVERLOAD DURATION IN s
POWER CURVE
10 000 000
1 000 000
POWER IN W
100 000
10 000
1000
100
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
OVERLOAD DURATION IN s
Revision: 16-Nov-17
Document Number: 50046
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
RPH 100
www.vishay.com
Vishay Sfernice
3.3 k
RESISTANCE
VALUE
±5%
TOLERANCE
±1%
±2%
±5%
V
CONNECTIONS
V: M4 screw
xxx
CUSTOM DESIGN
optional
on request:
special TCR,
shape etc.
ORDERING INFORMATION
RPH
MODEL
100
STYLE
GLOBAL PART NUMBER INFORMATION
R
P
H
1
0
0
V
1
0
0
0
0
J
B
GLOBAL
MODEL
RPH
SIZE
100
LEADS
V
= M4 screw
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
48701
= 48 700
10002
= 100 k
R0100
= 0.01
R6800
= 0.68
27000
= 2700
= 2.7 k
TOLERANCE
F
=1%
G
=2%
J
=5%
K
= 10 %
PACKAGING
B
= box
5 pieces
SPECIAL
As applicable
Ex
= XXX
RELATED DOCUMENTS
APPLICATION NOTES
Pulse Capabilities for Thick Film Power Resistors
Guidelines for Vishay Sfernice Resistive and Inductive Components
www.vishay.com/doc?50060
www.vishay.com/doc?52029
Revision: 16-Nov-17
Document Number: 50046
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,
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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
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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
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© 2017 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED
Revision: 08-Feb-17
1
Document Number: 91000
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