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LPS 800
www.vishay.com
Vishay Sfernice
CONFIG. 1:
WATER COOLING
HEATSINK CP15
AND THERMAL GREASE
BLUESIL PAST 340
CONFIG. 2:
AIR COOLING
HEATSINK P207/250
AND THERMAL GREASE
BLUESIL PAST 340
CONFIG. 3:
WATER COOLING
HEATSINK CP15 AND
THERMAL
PAD Q-PAD II
CONFIG. 4:
AIR COOLING
HEATSINK P207/250
AND 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)
710
175
0.112
0.05
0.059
18
282
175
0.112
0.13
0.29
25
307
175
0.112
0.34
0.059
18
180
175
0.112
0.43
0.29
25
Notes
? Configuration 1: Water cooling heatsink CP15 from Lytron (304 mm x 95.3 mm x 8 mm) with water flow rate 4 LPM 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 4 LPM 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.
OVERLOADS
In any case the applied voltage must be lower than
U L = 5000 V.
Short time overload: 1.5 x P r /10 s
Accidental overload: The values indicated on the following
graph are applicable to resistors in air or mounted onto a
heatsink.
ENERGY CURVE
10 000
1000
POWER RATING
The temperature of the case should be maintained within the
limits 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
80
60
100
40
10
20
1
0.1
0.0001 0.001
0.01
0.1
1
10
100
1000
0
0
50 100 150
8 5 1 7 5
BOTTOM CASE TEMPERATURE IN °C
200
OVERLOAD DURATION IN ms
POWER CURVE
10 000
1000
100
10
1
MARKING
Series, style, ohmic value (in Ω ), tolerance (in %),
manufacturing date, Vishay Sfernice trademark.
PACKAGING
Box of 15 units
0.0001 0.001
0.01
0.1
1
10
100
1000
OVERLOAD DURATION IN ms
Revision: 24-Oct-13
3
Document Number: 50054
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
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