LPS 1100
www.vishay.com
Vishay Sfernice
Power Resistor for Mounting onto a Heatsink
Thick Film Technology
FEATURES
• LPS high power: 1100 W
• Wide resistance range: 1
to 1.3 k
E24 series
• Non inductive
• Easy mounting
• Low thermal radiation of the case
• Material categorization: For definitions of compliance
please see
www.vishay.com/doc?99912
DIMENSIONS
in millimeters
25.8 ± 1
60
36
LPS 1100
I5U 5 %
V2
25.2
21.2
15.2
64.7
2 x Ø 4.2
34
57
2 x M4 useful depth: 8
Ø 20
13.6
Notes
• Tolerances unless stated: ± 0.2 mm
• Power dissipation is 1100 W by using a water cooled heatsink at T
water
= 15 °C of R
th
= 0.059 °C/W (25 °C to the nearest point of the resistor
onto heatsink) and R
th
contact estimated at 0.07 °C/W.
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
LPS 1100
RESISTANCE RANGE
1 to 1.3K
RATED POWER
P
25 °C
W
1100
TOLERANCE
±%
1, 2, 5, 10
TEMPERATURE COEFFICIENT
± ppm/°C
150
MECHANICAL SPECIFICATIONS
Mechanical Protection
Resistive Element
End Connections
Tightening Torque Connections
Tightening Torque Heatsink
Maximum Torque
Weight
Insulated case and resin for
potting UL 94 V-0
Thick film
Screws M4
2 Nm
2 Nm
2.5 Nm
79 g ± 10 %
TECHNICAL SPECIFICATIONS
Power Rating and
Thermal Resistance
Temperature Coefficient
(- 55 °C to + 200 °C),
IEC 60115-1
Dielectric Strength
IEC 60115-1,
1 min, 10 mA max.
Insulation
1100 W at + 25 °C
On heatsink
R
th(j-c)
: 0.039 °C/W
± 150 ppm/°C
7 kV
RMS
or 12 kV
RMS
10
4
M
0.1 μH
ENVIRONMENTAL SPECIFICATIONS
Temperature Range
Climatic Category
Revision: 05-Sep-12
- 55 °C to + 200 °C
55/200/56
Inductance
Document Number: 50059
1
For technical questions, contact:
sfer@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
LPS 1100
www.vishay.com
Vishay Sfernice
CONDITIONS
REQUIREMENTS
± (0.25 % + 0.05
)
PERFORMANCE
TESTS
Momentary Overload
IEC 60115-1: 2 x
P
r
/10 s for heatsink with
R
th(h-a)
0.26 °C/W (maximum power: 700 W)
1.6 x
P
r
/1 s for heatsink with 0.26 °C/W >R
th(h-a)
0.059 °C/W
(maximum power: 1800 W)
AEC-Q200 conditions: IEC 60115-1/IEC 60068-2-14, Test Na
50 cycles (- 55 °C to + 200 °C)
1000 cycles (- 55 °C to + 200 °C)
Load Life
Humidity (Steady State)
Mechanical Shock
Vibration
Climatic Sequence
AEC-Q200 conditions: IEC 60115-1
2000 h (90/30)
P
r
AEC-Q200 conditions: IEC 60115-1, 1000 h RH 85 %/85 °C
AEC-Q200 conditions: MIL-STD-202 method 213 condition D
(100
g’s/6
ms 3.75 m/s)
AEC-Q200 conditions: MIL-STD-202 method 204 condition D
(5
g,
20 min 10/2000 Hz)
AEC-Q200 conditions: IEC 60115-1 (55/200/56)
Rapid Temperature Change
± (0.5 % + 0.05
)
for all the ohmic values
± (5 % + 0.05
)
for R < 38
U
± (0.5 % + 0.05
)
for R
38
U
± (5 % + 0.05
)
for R < 38
U
± (0.5 % + 0.05
)
for R
38
U
± (0.5 % + 0.05
)
± (1 % + 0.05
)
± (1 % + 0.05
)
± (1 % + 0.05
)
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 (ceramic,
heatsink) should be coated with a silicone grease (type SI 340 from Blue Star Silicones). Thermal film (type Q-pad II from
Berquist) is also possible, easier and faster to install than grease but with a lower efficiency for the power dissipation.
• The fastening of the resistor to the heatsink is under pressure control of two screws tightened at 2 Nm for full power
availability.
Tightening Torque on Heatsink
LPS 1100
2 Nm
• The following accessories are supplied with each product:
- 2 screws CHC M4 x 25 class 8.8 and 2 M4 contact lock washers for heatsink mounting
- 2 screws TH M4 x 6/6 and 2 M4 contact lock washers for connections. 2 off CHC M4 x 16/16 class 8
CHOICE OF THE HEATSINK AND THE THERMAL INTERFACE
The user must choose the heatsink according to the working conditions of the component (power, room temperature).
Maximum working temperature must not exceed 200 °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:
Expressed in W
T:
Difference between maximum working temperature and room temperature or fluid cooling temperature.
R
th (j - c)
: Thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal
resistance of the component: 0.039 °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.
Example:
R
th (c - h)
+ R
th (h - a)
for LPS 1100 power dissipation 850 W at + 18 °C fluid temperature.
T
200 °C - 18 °C
=
182 °C
T
182
-
-
R
th (j - c)
+
R
TH (c - h)
+
R
TH (h - a)
=
------
=
---------
=
0.214 °C/W
P
850
R
th (j - c)
=
0.039 °C/W
R
th (c - h)
+
R
th (h - a)
=
0.214 °C/W - 0.039 °C/W
=
0.175 °C/W
Revision: 05-Sep-12
Document Number: 50059
2
For technical questions, contact:
sfer@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
LPS 1100
www.vishay.com
Vishay Sfernice
CONFIG. 4:
CONFIG. 3:
CONFIG. 2:
CONFIG. 1:
AIR COOLING
WATER COOLING
AIR COOLING
WATER COOLING
HEATSINK P207/250 AND
HEATSINK CP15 AND
HEATSINK P207/250 AND
HEATSINK CP15 AND
THERMAL GREASE SI340 THERMAL GREASE SI340 THERMAL PAD Q-PAD II THERMAL PAD Q-PAD II
Power Dissipation (W)
T° Resistive Element (°C)
R
th(j-c)
max. (°C/W)
R
th(c-h)
typ. (°C/W)
R
th(h-a)
max. (°C/W)
Fluid T° (°C)
1100
200
0.039
0.070
0.059
15 (water)
350
200
0.039
0.201
0.260
25 (air)
650
200
0.039
0.187
0.059
15 (water)
285
200
0.039
0.315
0.260
25 (air)
Note
• Configuration 1: Water cooling heatsink (CP15 from Lytron (304 mm x 95.3 mm x 8 mm) with water flow rate 4LPM and thermal grease Si340
from BlueStar Silicones
Configuration 2: Air cooling heatsink P207/250 from Semikron (250 mm x 200 mm x 72 mm) and thermal grease Si340 from BlueStar
Silicones
Configuration 3: Water cooling heatsink (CP15 from Lytron (304 mm x 95.3 mm x 8 mm) with water flow rate 4LPM and thermal pad
Q-pad II from Berquist
Configuration 4: Air cooling heatsink P207/250 from Semikron (250 mm x 200 mm x 72 mm) and thermal pad Q-pad II from Berquist
OVERLOAD
In any case the applied voltage must be lower than
U
I
= 6600 V.
Short time overload:
2 x Pr/10 s for heatsink with
R
th(h-a)
0.26 °C/W (maximum power: 700 W) and 1.6 x
Pr/1 s for heatsink with 0.26 °C/W > R
th(h-a)
0.059 °C/W
(maximum power: 1800 W).
Accidental overload:
The values indicated on the following
graph are applicable to resistors in air or mounted onto a
heatsink.
POWER RATING
The temperature of the case should be maintained within
the limit specified in the following figure. To optimize
the thermal conduction, contacting surfaces should be
coated with silicone grease or thermal film, and heatsink
mounting screws tightened to 2 Nm.
100
ENERGY CURVE
10 000
1000
RATED POWER IN %
80
60
40
ENERGY IN J
100
10
20
0
1
0.1
0.01
10
-7
0
25
50
75
100
125
150
175
200
HEATSINK TEMPERATURE IN °C
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
PACKAGING
1
OVERLOAD DURATION IN s
Box of 15 units
MARKING
Series, style, ohmic value (in
),
tolerance (in %),
manufacturing date, Vishay Sfernice trademark.
ORDERING INFORMATION
LPS
1100
1 k
RESISTANCE
VALUE
±1%
xxx
CUSTOM
DESIGN
Optional on
request:
special TCR,
shape, etc.
BO15
e
MODEL
STYLE
TOLERANCE
±1%
±2%
±5%
± 10 %
PACKAGING
LEAD (Pb)-FREE
Revision: 05-Sep-12
Document Number: 50059
3
For technical questions, contact:
sfer@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
LPS 1100
www.vishay.com
Vishay Sfernice
GLOBAL PART NUMBER INFORMATION
L
P
S
1
1
0
0
H
4
7
R
0
J
B
GLOBAL
MODEL
LPS 1100
DIELECTRIC
L
= Dielectric
strengh 7 kV
H
= Dielectric
strengh 12 kV
OHMIC VALUE
The first three digits are
significant figures and the
last digit specifies the
number of zeros to follow.
R designates decimal point.
48R7
= 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
SPECIAL
As applicable
ZAx
Revision: 05-Sep-12
Document Number: 50059
4
For technical questions, contact:
sfer@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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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
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including but not limited to the warranty expressed therein.
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of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
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Revision: 12-Mar-12
1
Document Number: 91000
