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LTO050F100R0JTE3

P1-P3P4-P5
LTO 50
www.vishay.com
Vishay Sfernice
Revision: 30-Jan-13
1
Document Number: 50050
For technical questions, contact: sfer@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
Power Resistor Thick Film Technology
LTO series are the extension of RTO types. We used the
direct ceramic mounting design (no metal tab) of our RCH
power resistors applied to semiconductor packages.
FEATURES
• 50 W at 25 °C case temperature heatsink
mounted
• Direct mounting ceramic on heatsink
• Broad resistance range: 0.010 to 550 k
•Non inductive
• TO-220 package: Compact and easy to mount
• Material categorization: For definitions of compliance
please see www.vishay.com/doc?99912
Note
• Tolerances unless stated: ± 0.3 mm
DIMENSIONS in millimeters
STANDARD ELECTRICAL SPECIFICATIONS
MODEL SIZE
RESISTANCE
RANGE
RATED POWER
P
25 °C
W
LIMITING ELEMENT
VOLTAGE U
L
V
TOLERANCE
± %
TEMPERATURE
COEFFICIENT
± ppm/°C
CRITICAL
RESISTANCE
LTO 50 TO-220 0.010 to 550K 50 500 1, 2, 5, 10 150, 250, 700, 900 5K
3.2
16.2
10.4
1.8
508
0.6
3.5
1.3
0.8
12.7
Ø 3.2
3.2
MECHANICAL SPECIFICATIONS
Mechanical Protection Molded
Resistive Element Thick film
Substrate Alumina
Connections Tinned copper
Weight 2 g max.
Mounting Torqure 1 Nm
ENVIRONMENTAL SPECIFICATIONS
Temperature Range - 55 °C to + 155 °C
Climatic Category 55/155/56
Flammability
IEC 60695-11-5
2 applications 30 s
separated by 60 s
TECHNICAL SPECIFICATIONS
Dissipation and Associated Onto a heatsink
Power Rating and
Thermal Resistance
of the Component
50 W at + 25 °C (case temp.)
R
TH (j - c)
: 2.5 °C/W
Free air:
2.5 W at + 25 °C
Temperature Coefficient See Performance table
Standard ± 150 ppm/°C
Dielectric Strength
MIL STD 202
1500 V
RMS
- 1 min
10 mA max.
Insulation Resistance 10
4
M
Inductance 0.1 μH
LTO 50
www.vishay.com
Vishay Sfernice
Revision: 30-Jan-13
2
Document Number: 50050
For technical questions, contact: sfer@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 150 °C. The dissipated power is simply calculated by the following ratio:
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 - a)
: Thermal resistance value measured between outer side of
the resistor and room temperature. It is the thermal
resistance of the heatsink itself (type, shape) and the quality of the
fastening device, and the thermal resistance of the thermal
compound.
Example:
R
TH (c - a)
for LTO 50 power rating 10 W at ambient temperature + 25 °C
Thermal resistance R
TH (j - c)
: 2.5 °C/W
Considering equation
(1)
we have:
T = 150 °C - 25 °C = 125 °C
R
TH (j - c)
+ R
TH (c - a)
= = = 12.5 °C/W
R
TH (c - a)
= 12.5 °C/W - 2.5 °C/W = 10 °C/W
with a thermal grease R
TH (c - h)
= 1 °C/W, we need a heatsink with R
TH (h - a)
= 9 °C/W.
PERFORMANCE
TESTS CONDITIONS REQUIREMENTS
Momentary Overload
EN 60115-1
1.5 Pr/5 s
U
S
< 1.5 U
L
± (0.5 % + 0.005 )
Rapid Temperature Change
EN 60115-1
IEC 60068-2-14 Test Na
5 cycles
- 55 °C to + 155 °C
± (0.5 % + 0.005 )
Load Life
EN 60115-1
1000 h Pr at + 25 °C
± (1 % + 0.005 )
Humidity (Steady State)
MIL-STD-202
method 103 B cond. D
± (0.5 % + 0.005 )
Vibration
MIL-STD-202
method 204 cond. D
± (0.2 % + 0.005 )
Terminal Strength
MIL-STD-202
method 211 cond. A1
± (0.2 % + 0.005 )
Shock
100G, MIL-STD-202
method 213 cond. I
± (0.5 % + 0.005 )
SPECIAL FEATURES
Resistance Values 0.010 0.015 0.1 0.5
Tolerances ± 1 % at ± 10 %
Typical Temperature Coefficient
(- 55 ° to + 155 °C)
± 900 ppm/°C ± 700 ppm/°C ± 250 ppm/°C ± 150 ppm/°C
P =
T
R
TH (j - c)
+ R
TH (c - a)

-----------------------------------------------------------
1
T
P
-------
125
10
-----------
LTO 50
www.vishay.com
Vishay Sfernice
Revision: 30-Jan-13
3
Document Number: 50050
For technical questions, contact: sfer@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
OVERLOADS
In any case the applied voltage must be lower than the
maximum overload voltage of 750 V.
The values indicated on the graph below are applicable to
resistors in air or mounted onto a heatsink.
ENERGY CURVE
POWER CURVE
POWER RATING
The temperature of the case should be maintained within the
limits specified.
To improve the thermal conductivity, surfaces in contact
should be coated with a silicone grease and the torque
applied on the screw for tightening should be around 1 Nm.
MARKING
Model, style, resistance value (in ), tolerance (in %),
manufacturing date, Vishay Sfernice trademark.
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
10
0
100
1000
10 000
100 000
1 000 000
POWER IN W
OVERLOAD DURATION IN s
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
10
0
PACKAGING
Tube of 50 units
0 20 40 60 80 100 120 140 150
100
125
75
50
25
0
RATED POWER IN %
CASE TEMPERATURE IN °C
P1-P3P4-P5

LTO050F100R0JTE3

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Buy LTO050F100R0JTE3
Manufacturer:
Vishay
Description:
Thick Film Resistors - Through Hole 100ohms 5%
Lifecycle:
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