LTO150 datasheet(2/5 Pages) VISHAY

2 / 5 page

LTO 150

www.vishay.com

Vishay Sfernice

Revision: 27-Sep-2019

Document Number: 50071

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

CHOICE OF THE HEATSINK

The user must choose according to the working conditions of the component (power, room temperature).



Maximum working temperature must not exceed 175 °C. The dissipated power is simply calculated by the following ratio:

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.



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 - h) + RTH (h - a) for LTO 150 power rating 10 W at ambient temperature +25 °C

Thermal resistance RTH (j - c): 0.87 °C/W 

Considering equation (1) we have:

T = 175 °C - 25 °C = 150 °C 

RTH (j - c) + RTH (c - h) + RTH (h - a) =

= 15 °C/W



RTH (c - h) + RTH (h - a) = 15 °C/W - 0.87 °C/W = 14.13 °C/W

Example with a thermal grease RTH (c - h) = 0.5 °C/W, we need a heatsink with RTH (h - a) = 13.63 °C/W

PERFORMANCE

TESTS

CONDITIONS

REQUIREMENTS

Momentary Overload

IEC 60115-1

1.5 Pr/5 s

US < 1.5 UL

± (0.5 % + 0.005

)

Load Life

IEC 60115-1

1000 h Pr (free air) at +25 °C 90/30

± (1 % + 0.005

)

High Temperature Exposure

AEC-Q200 REV D conditions:

MIL-STD-202 method 108

1000 h, +175 °C, unpowered

± (0.5 % + 0.005

)

Temperature Cycling

AEC-Q200 REV D conditions:

JESD22 method JA-104

1000 cycles, -55 °C to +125 °C

dwell time -15 min

± (1 % + 0.005

)

Biased Humidity

AEC-Q200 REV D conditions:

MIL-STD-202 method 103

1000 h, 85 °C, 85 % RH (10 % of free air power)

± (1 % +0.005

)

Operational Life

AEC-Q200 REV D conditions:

MIL-STD-202 method 108

1000 h, 90/30, powered (free air) at +125 °C

± (1 % +0.005

)

ESD Human Body Model

AEC-Q200 REV D conditions:

AEC-Q200-002 IEC 61000-4-2

25 kVAD

± (0.5 % +0.005

)

Vibration

AEC-Q200 REV D conditions:

MIL-STD-202 method 204

5 g’s for 20 min, 12 cycles

test from 10 Hz to 2000 Hz

± (0.5 % +0.005

)

Mechanical Shock

AEC-Q200 REV D conditions:

MIL-STD-202 method 213

100 g’s, 6 ms, 3.75 m/s

3 shocks/direction

± (0.5 % +0.005

)

Terminal Strength

AEC-Q200 REV D conditions:

AEC-Q200-006

2 kgf, 60 s

± (0.25 % +0.01

)

SPECIAL FEATURES

Resistance Values

 0.03

 0.1

> 20

Tolerances

± 1 % at ± 10 %

Typical Temperature Coefficient



(-55 ° to +175 °C)

± 900 ppm/°C

± 350 ppm/°C

± 200 ppm/°C

P =

T

TH (j - c)



TH (c - h)



TH (h - a)



-----------------------------------------------------------------------------------



T

-------

150

-----------

LTO150 датащи(PDF) 2 Page - Vishay Siliconix

LTO150 датащи(HTML) 2 Page - Vishay Siliconix

Html Pages

1 2 3 4 5

датащи скачать

ссылки URL