LPS-1100 Datasheet, PDF (3/5 Pages) Vishay Siliconix – Power Resistor for Mounting onto a Heatsink Thick Film Technology

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LPS 1100
Vishay Sfernice
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)
CONFIG. 1:
WATER COOLING
HEATSINK CP15 AND
THERMAL GREASE
BLUESIL PAST 340
1100
200
0.039
0.070
0.059
15 (water)
CONFIG. 2:
AIR COOLING
HEATSINK P207/250 AND
THERMAL GREASE
BLUESIL PAST 340
350
200
0.039
0.201
0.260
25 (air)
CONFIG. 3:
WATER COOLING
HEATSINK CP15 AND
THERMAL PAD Q-PAD II
650
200
0.039
0.187
0.059
15 (water)
CONFIG. 4:
AIR COOLING
HEATSINK P207/250 AND
THERMAL PAD Q-PAD II
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 Bluesil
Past 340 from BlueStar Silicones
Configuration 2: Air cooling heatsink P207/250 from Semikron (250 mm x 200 mm x 72 mm) and thermal grease Bluesil Past 340 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.
ENERGY CURVE
10 000
MARKING
Series, style, ohmic value (in Ω), tolerance (in %),
manufacturing date, Vishay Sfernice trademark.
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
1000
80
100
60
10
1
0.0001 0.001 0.01
0.1
1
10
100
OVERLOAD DURATION IN ms
POWER CURVE
100 000
10 000
1000
100
10
1
0.0001 0.001 0.01
0.1
1
10
100
OVERLOAD DURATION IN ms
40
20
0
0 25 50 75 100 125 150 175 200
HEATSINK TEMPERATURE IN °C
PACKAGING
Box of 15 units
Revision: 24-Oct-13
3
Document Number: 50059
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