LTO 150
www.vishay.com Vishay Sfernice
Revision: 27-Sep-2019 1Document 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
Clip Mount Power Resistor Thick Film Technology
LTO150 are the extension of LTO series. The component is
used in direct contact with heatsink. Fixation done by clip.
ADDITIONAL RESOURCES
FEATURES
• 150 W at 45 °C case temperature heatsink
mounted
• Direct mounting ceramic on heatsink
• Broad resistance range: 0.03 to 1.3 M
• Non inductive
• TO-247 package: compact and easy to mount
• Designed for clip mounting
• UL 94 V-0 material used - compliant with EN45545-2
•AEC-Q200 qualified
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
Note
• Tolerances unless stated: ± 0.3 mm
3
3
3
D
D
D
3
D
3D Models
DIMENSIONS in millimeters
STANDARD ELECTRICAL SPECIFICATIONS
MODEL SIZE
RESISTANCE
RANGE
RATED POWER
P45 °C
W
LIMITING ELEMENT
VOLTAGE UL
V
TOLERANCE
± %
TEMPERATURE
COEFFICIENT
± ppm/°C
CRITICAL
RESISTANCE
LTO 150 TO-247 0.03 to 1.3M 150 500 1, 2, 5, 10 200, 350, 900 1.66K
14.5
10.16
3.5
20.7
3.6
15.76
5.33
5
0.3
R2
0.6
2.4
10.5
MECHANICAL SPECIFICATIONS
Mechanical Protection Molded
Resistive Element Thick film
Substrate Alumina
Connections Tinned copper
Weight 4 g max.
Clip Assembly Force 60 N to 110 N
ENVIRONMENTAL SPECIFICATIONS
Temperature Range -55 °C to +175 °C
Climatic Category 55 / 175 / 56
Flammability IEC 60695-11-5
2 applications 30 s
separated by 60 s
TECHNICAL SPECIFICATIONS
Dissipation and Associated Onto a heatsink + clip
Power Rating and
Thermal Resistance of
the Component
150 W at +45 °C (case temp.)
RTH (j - c): 0.87 °C/W
Free air: 4.5 W at +25 °C
Temperature Coefficient See Performance table
± 200 ppm/°C
Dielectric Strength
IEC 60115-1
3000 VRMS - 1 min
10 mA max.
Insulation Resistance 104 M
Inductance 0.1 μH
LTO 150
www.vishay.com Vishay Sfernice
Revision: 27-Sep-2019 2Document 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:
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.
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
RTH (j - c)
RTH (c - h)
RTH (h - a)
++
-----------------------------------------------------------------------------------
1
T
P
-------
150
10
-----------
LTO 150
www.vishay.com Vishay Sfernice
Revision: 27-Sep-2019 3Document 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
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. MAX08NG from AAVID screwed clip mounting.
CONFIGURATION 2: Air cooling heatsink 0S552 from AAVID (48 mm x 80 mm x 70 mm) and thermal grease Bluesil Past 340
from BlueStar silicones. MAX03HNG from AAVID clipped mounting.
CONFIGURATION 3: Air cooling heatsink 0S550 from AAVID (31.75 mm x 58.7 mm x 70 mm) and thermal grease Bluesil Past
340 from BlueStar silicones. MAX03HNG from AAVID clipped mounting.
MOMENTARY OVERLOAD
In any case the applied voltage must be lower than the
maximum overload voltage of 750 V during 5 s.
ENERGY CURVE (SINGLE PULSE)
The values indicated on the graph below are applicable to
resistors in air or mounted onto a heatsink.
POWER CURVE
POWER RATING
The temperature of the case should be maintained within the
limits specified.
MARKING
Model, style, resistance value (in ), tolerance (in %),
manufacturing date, Vishay Sfernice trademark according
IEC 60062.
CONFIGURATION 1 CONFIGURATION 2 CONFIGURATION 3
Power Dissipation (W) 150 35 26
T° Resistive Element (°C) 175 175 175
RTH (j - c) Max. (°C/W) 0.87 0.87 0.87
RTH (c - h) Typ. (°C/W) 0.127 0.33 0.33
RTH (h - a) Max. (°C/W) 0.069 3.09 4.57
Fluid T° (°C) 15 (water) 25 (air) 25 (air)
0.01
0.1
1
10
100
ENERGY IN JOULES
OVERLOAD DURATION IN s
10-7 10-6 10-5 10-4 10-3 10-2 10-1 100
PACKAGING
Tube of 30 units
0 20 40 60 80 100 120 140 160 175
100
125
75
50
25
0
RATED POWER IN %
CASE TEMPERATURE IN °C
LTO 150
www.vishay.com Vishay Sfernice
Revision: 27-Sep-2019 4Document 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
CLIPS
CLIP MOUNTING RECOMMENDATION
To improve the thermal conductivity, all surface of ceramic has to be coated with a thermal silicon grease. If you not use our
clipped or screwed clip, it is recommended that a mounting force of 60 N to 110 N be applied to the center of the molding case
of the component. Tightening torque 2 Nm when mounting screwed clip MAX08NG on heatsink.
ACCLLTO150CL (MAX03HNG) ACCLLTO150VS (MAX08NG)
ORDERING INFORMATION
LTO 150 F 2.7 k± 1 % xxx TU30 e3
MODEL STYLE CONNECTIONS RESISTANCE VALUE TOLERANCE
± 1 %
± 2 %
± 5 %
± 10 %
CUSTOM DESIGN
Optional
on request:
special TCR,
shape etc.
PACKAGING LEAD (Pb)-FREE
GLOBAL PART NUMBER INFORMATION
GLOBAL
MODEL SIZE LEADS OHMIC VALUE TOLERANCE PACKAGING LEAD (Pb)-FREE
LTO 150 F = radial leads The first four digits are
significant figures and the
last digit specifies the
number of zeros to follow.
R designates decimal point.
48R70 = 48.7
48701 = 48 700
10002 = 100 000
R0100 = 0.01
R4700 = 0.47
27000 = 2700 = 2.7 k
F = 1 %
G = 2 %
J = 5 %
K = 10 %
T = tube
Tube 30 pieces
E3 = pure tin
CLIP PART NUMBER INFORMATION
REFERENCE PART NUMBER FOR ORDERING
Screwed clip MAX08NG ACCLLTO150VS
Clipped clip MAX03HNG ACCLLTO150CL
18
21.5
9.3
0.6
30.55
18
Ø 4.2
5.9
0.6
14.7
23.5
150F270 0 T 3T OL 0JE
Legal Disclaimer Notice
www.vishay.com Vishay
Revision: 01-Jan-2021 1Document Number: 91000
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding
statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a
particular 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
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk.
Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for
such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document
or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
© 2021 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED