LTO 150
www.vishay.com
Vishay Sfernice
Clip Mount Power Resistor Thick Film Technology
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
LTO150 are the extension of LTO series. The component is
used in direct contact with heatsink. Fixation done by clip.
•
AEC-Q200 qualified
• Material categorization: for definitions of compliance
please see
www.vishay.com/doc?99912
DIMENSIONS
in millimeters
15.76
5.33
10.5
R2
20.7
0.3
3.6
3.5
0.6
14.5
5
10.16
2.4
Note
• Tolerances unless stated: ± 0.3 mm
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
LTO 150
SIZE
TO-247
RESISTANCE
RANGE
0.03 to 1.3M
RATED POWER LIMITING ELEMENT
TOLERANCE
VOLTAGE U
L
P
25 °C
±%
W
V
150
500
1, 2, 5, 10
TEMPERATURE
COEFFICIENT
± ppm/°C
200, 350, 900
CRITICAL
RESISTANCE
1.66K
MECHANICAL SPECIFICATIONS
Mechanical Protection
Resistive Element
Substrate
Connections
Weight
Clip Assembly Force
Molded
Thick film
Alumina
Tinned copper
4 g max.
60 N to 110 N
TECHNICAL SPECIFICATIONS
Dissipation and Associated
Power Rating and
Thermal Resistance
of the Component
Temperature Coefficient
Dielectric Strength
IEC 60115-1
Insulation Resistance
Inductance
Onto a heatsink + clip
150 W at +45 °C (case temp.)
R
TH (j - c)
: 0.87 °C/W
Free air: 4.5 W at +25 °C
See Performance table
± 200 ppm/°C
3000 V
RMS
- 1 min
10 mA max.
10
4
M
0.1 μH
ENVIRONMENTAL SPECIFICATIONS
Temperature Range
Climatic Category
Flammability
-55 °C to +175 °C
55 / 175 / 56
IEC 60695-11-5
2 applications 30 s
separated by 60 s
Revision: 15-Feb-18
Document Number: 50071
1
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
LTO 150
www.vishay.com
Vishay Sfernice
CONDITIONS
IEC 60115-1
1.5 Pr/5 s
U
S
< 1.5
U
L
IEC 60115-1
1000 h Pr (free air) at +25 °C 90/30
AEC-Q200 REV D conditions:
MIL-STD-202 method 108
1000 h, +175 °C, unpowered
AEC-Q200 REV D conditions:
JESD22 method JA-104
1000 cycles, -55 °C to +125 °C
dwell time -15 min
AEC-Q200 REV D conditions:
MIL-STD-202 method 103
1000 h, 85 °C, 85 % RH (10 % of free air power)
AEC-Q200 REV D conditions:
MIL-STD-202 method 108
1000 h, 90/30, powered (free air) at +125 °C
AEC-Q200 REV D conditions:
AEC-Q200-002 IEC 61000-4-2
25 kV
AD
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
AEC-Q200 REV D conditions:
MIL-STD-202 method 213
100
g’s,
6 ms, 3.75 m/s
3 shocks/direction
AEC-Q200 REV D conditions:
AEC-Q200-006
2 kgf, 60 sec
REQUIREMENTS
± (0.5 % + 0.005
)
± (1 % + 0.005
)
± (0.5 % + 0.005
)
PERFORMANCE
TESTS
Momentary Overload
Load Life
High Temperature Exposure
Temperature Cycling
± (1 % + 0.005
)
Biased Humidity
± (1 % +0.005
)
± (1 % +0.005
)
± (0.5 % +0.005
)
Operational Life
ESD Human Body Model
Vibration
± (0.5 % +0.005
)
Mechanical Shock
± (0.5 % +0.005
)
Terminal Strength
± (0.25 % +0.01
)
SPECIAL FEATURES
Resistance Values
Tolerances
Typical Temperature Coefficient
(-55 ° to +175 °C)
± 900 ppm/°C
0.015
0.1
± 1 % at ± 10 %
± 350 ppm/°C
± 200 ppm/°C
> 20
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:
1
T
P = -----
------------
-------------
------------
-------------
-------------
------------ -
--
R
TH (j - c)
+
R
TH (c - h)
+
R
TH (h - a)
P:
Expressed in W
T:
Difference between maximum working temperature and room temperature
R
TH (j - c)
: Thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal resistance of the
component.
R
TH (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.
R
TH (h - a)
: Thermal resistance of the heatsink
Example:
R
TH (c - h)
+ R
TH (h - a)
for LTO 150 power rating 10 W at ambient temperature +25 °C
Thermal resistance R
TH (j - c)
: 0.87 °C/W
Considering equation
(1)
we have:
T
= 175 °C - 25 °C = 150 °C
150
T
R
TH (j - c)
+ R
TH (c - h)
+ R
TH (h - a)
=
------
=
----------
= 15 °C/W
-
-
10
P
R
TH (c - h)
+ R
TH (h - a)
= 15 °C/W - 0.87 °C/W = 14.13 °C/W
Example with a thermal grease R
TH (c - h)
= 0.5 °C/W, we need a heatsink with R
TH (h - a)
= 13.63 °C/W
Revision: 15-Feb-18
Document Number: 50071
2
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
LTO 150
www.vishay.com
Vishay Sfernice
CONFIGURATION 1
CONFIGURATION 2
35
175
0.87
0.33
3.09
25 (air)
CONFIGURATION 3
26
175
0.87
0.33
4.57
25 (air)
150
175
0.87
0.127
0.069
15 (water)
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)
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.
POWER RATING
The temperature of the case should be maintained within the
limits specified.
125
ENERGY CURVE (SINGLE PULSE)
The values indicated on the graph below are applicable to
resistors in air or mounted onto a heatsink.
100
100
RATED POWER IN %
75
ENERGY IN JOULES
10
50
1
25
0.1
0
0
20
40
60
80
100
120
140
160 175
CASE TEMPERATURE IN °C
0.01
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
OVERLOAD DURATION IN s
PACKAGING
Tube of 30 units
POWER CURVE
1 000 000
MARKING
Model, style, resistance value (in
),
tolerance (in %),
manufacturing date, Vishay Sfernice trademark according
IEC 60062.
100 000
POWER IN W
10 000
1000
100
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
OVERLOAD DURATION IN s
Revision: 15-Feb-18
Document Number: 50071
3
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
LTO 150
www.vishay.com
CLIPS
ACCRFLTO150CL (MAX03HNG)
Ø 4.2
18
18
Vishay Sfernice
ACCRFLTO150VS (MAX08NG)
30.55
21.5
9.3
0.6
5.9
0.6
14.7
23.5
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.
ORDERING INFORMATION
LTO
MODEL
150
STYLE
F
CONNECTIONS
2.7 k
RESISTANCE VALUE
±1%
TOLERANCE
±1%
±2%
±5%
± 10 %
xxx
CUSTOM DESIGN
Optional
on request:
special TCR,
shape etc.
TU30
PACKAGING
e3
LEAD (Pb)-FREE
GLOBAL PART NUMBER INFORMATION
L
T
O
1
5
0
F
2
7
0
0
0
J
T
E
3
GLOBAL
MODEL
LTO
SIZE
150
LEADS
F
= radial leads
OHMIC VALUE
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
TOLERANCE
F
=1%
G
=2%
J
=5%
K
= 10 %
PACKAGING
T
= tube
Tube 30 pieces
LEAD (Pb)-FREE
E3
= pure tin
CLIP PART NUMBER INFORMATION
REFERENCE
Screwed clip MAX08NG
Clipped clip MAX03HNG
Revision: 15-Feb-18
PART NUMBER FOR ORDERING
ACCRFLTO150VS
ACCRFLTO150CL
Document Number: 50071
4
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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