RTO020FR680JE0T3 データシートの表示（PDF） - Vishay Semiconductors
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RTO020FR680JE0T3 Datasheet PDF : 5 Pages
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www.vishay.com
RTO 20
Vishay Sfernice
PERFORMANCE
TESTS
Momentary Overload
Rapid Temperature Change
Load Life
Humidity (Steady State)
High Temperature Exposure
Vibration
Terminal Strength
Shock
CONDITIONS
EN 60115-1
2 Pr 5 s for R < 2
1.6 Pr 5 s for R 2
US < 1.5 UL
EN 60115-1/60068-2-14
5 cycles
-55 °C to +155 °C
EN 60115-1
1000 h Pr at +25 °C
EN 60115-1
56 days RH 95 %
NF EN 140 000
1000 h - 40 % Pr at +100 °C
MIL STD 202, Method 204 C Test D
MIL STD 202, Method 211 Test A1
IEC 60115-1
IEC 60068-2-27
Saw tooth: 100 g/6 ms
REQUIREMENTS
± (0.25 % + 0.005 )
± (0.5 % + 0.005 )
± (1 % + 0.005 )
± (0.5 % + 0.005 )
± (0.5 % + 0.005 )
± (0.2 % + 0.005 )
± (0.2 % + 0.005 )
± (0.5 % + 0.005 )
RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR
Resistance Values
0.01
0.015
0.1
Tolerances
± 1 % at ± 10 %
Typical Temperature
Coefficient Range
(-55 °C to +155 °C)
± 900 ppm/°C
± 700 ppm/°C
± 250 ppm/°C
Note
• For very low ohmic values, TCR for information
0.5
± 150 ppm/°C
CHOICE OF THE HEATSINK
The user must choose the board according to the working conditions of the component (power, room temperature).
Maximum working temperature must not exceed 155 °C. The dissipated power is simply calculated by the following ratio:
P = -R----T---H------(-j-------c---)---+-----R-----T---H------(-Tc---------h---)---+-----R----T---H------(-h---------a---)1
P:
Expressed in W
T:
Difference between maximum working temperature and room temperature
RTH (j - c): Thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal
resistance of the component: Special Features table.
RTH (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.
Rth (h - a): Thermal resistance of the heatsink.
Example:
RTH (c - a) for RTO 20 power rating 10 W at ambient temperature +25 °C
Thermal resistance RTH (j - c): 6.5 °C/W
Considering equation (1) we have:
T = 155 °C - 25 °C = 130 °C
RTH (j - c) + RTH (c - h) + RTH (h - a) = --P---T- = 1--1-3--0-0-- = 13 °C/W
RTH (c - h) + RTH (h - a) = 13 °C/W - 6.5 °C/W = 6.5 °C/W
Revision: 16-Nov-17
2
Document Number: 50005
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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