LTO050F10002KTE3 [VISHAY]
Power Resistor Thick Film Technology; 功率电阻器厚膜工艺
| 型号： | LTO050F10002KTE3 |
| 厂家： | 
VISHAY |
| 描述： | Power Resistor Thick Film Technology |
| 文件： | 总4页 (文件大小：109K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTO 50
Vishay Sfernice
Power Resistor Thick Film Technology
FEATURE
• 50 W at 25 °C case temperature heatsink
mounted
RoHS
COMPLIANT
• Direct mounting ceramic on heatsink
• Broad resistance range: R010 to 550K
• Non inductive
• TO-220 package: Compact and easy to mount
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.
• RoHS compliant
• Isolated case
DIMENSIONS in millimeters
3.2
10.4
3.2
16.2
12.7
Ø 3.2
1.3
0.8
3.5
0.6
1.8
5.08
MECHANICAL SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
Mechanical Protection
Resistive Element
Substrate
Molded
Thick film
Alumina
Resistance Range
0.010 Ω to 550 kΩ
Tolerances (Standard)
Dissipation and Associated
1 ꢀ to 10 ꢀ
Onto a heatsink
Connections
Weight
Mounting Torqure
Tinned copper
2 g max.
1 Nm
50 W at + 25 °C (case temp.)
Power Rating and
Thermal Resistance
of the Component
RTH (j - c): 2.5 °C/W
Free air:
2.5 W at + 25 °C
DIMENSIONS
Temperature Coefficient
Standard
See Performance table
150 ppm/°C
Standard Package
TO-220 isolated case
ENVIRONMENTAL SPECIFICATIONS
Limiting Element Voltage UL
250 V
Dielectric Strength
MIL STD 202
1500 VRMS - 1 min
10 mA max.
Temperature Range
Climatic Category
Flammability
- 55 °C to + 155 °C
55/155/56
IEC 60695-11-5
2 applications 30 s
separated by 60 s
Insulation Resistance
Inductance
≥ 104 MΩ
≤ 0.1 µH
1.25 kΩ
Critical Resistance
Document Number: 50050
Revision: 16-Oct-08
For technical questions, contact: sfer@vishay.com
www.vishay.com
1
LTO 50
Power Resistor Thick Film Technology
Vishay Sfernice
PERFORMANCE
TESTS
CONDITIONS
REQUIREMENTS
EN 60115-1
1.5 Pr/5 s
US < 1.5 UL
Momentary Overload
(0.5 ꢀ + 0.005 Ω)
EN 60115-1
IEC 60068-2-14 Tests Na
5 cycles
Rapid Temperature Change
(0.5 ꢀ + 0.005 Ω)
- 55 °C to + 155 °C
EN 60115-1
1000 h Pr at + 25 °C
Load Life
(1 ꢀ + 0.005 Ω)
(0.5 ꢀ + 0.005 Ω)
(0.2 ꢀ + 0.005 Ω)
(0.2 ꢀ + 0.005 Ω)
(0.5 ꢀ + 0.005 Ω)
MIL STD 202
Method 103 B Cond. D
Humidity (Steady State)
Vibration
MIL STD 202
Method 204 Cond. D
MIL STD 202
Method 211 Cond. A1
Terminal Strength
Shock
100G, MIL STD 202
Method 213 Cond. I
SPECIAL FEATURES
Resistance Values
≥ 0.010
≥ 0.015
≥ 0.1
≥ 0.5
Tolerances
1 ꢀ at 10 ꢀ
250 ppm/°C
Typical Temperature Coefficient
(- 55 ° to + 155 °C)
900 ppm/°C
ꢁ00 ppm/°C
150 ppm/°C
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:
(1)
ΔT
---------------------------------------------------------------------
P =
[RTH (j – c) + RTH (c – a)]
P:
Expressed in W
Difference between maximum working temperature and room temperature
ΔT:
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.
RTH (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:
TH (c - a) for LTO 50 power rating 10 W at ambient temperature + 25 °C
R
Thermal resistance RTH (j - c): 2.5 °C/W
Considering equation (1) we have:
ΔT = 150 °C - 25 °C = 125 °C
ΔT
125
---------
= 12.5 °C/W
-------
RTH (j - c) + RTH (c - a) =
=
P
10
RTH (c - a) = 12.5 °C/W - 2.5 °C/W = 10 °C/W
with a thermal grease RTH (c - h) = 1 °C/W, we need a heatsink with RTH (h - a) = 9 °C/W.
www.vishay.com
2
For technical questions, contact: sfer@vishay.com
Document Number: 50050
Revision: 16-Oct-08
LTO 50
Power Resistor Thick Film Technology
Vishay Sfernice
OVERLOADS
In any case the applied voltage must be lower than the
maximum overload voltage of 3ꢁ5 V.
POWER RATING CHART
The temperature of the case should be maintained within the
limits specified.
The values indicated on the graph below are applicable to
resistors in air or mounted onto a heatsink.
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.
ENERGY CURVE
100
10
1
75
50
25
0
0.1
0.01
10-6
10-5
10-4
10-3
10-2
0
20
40
60
80
100
120
140 150
OVERLOAD DURATION IN s
HEATSINK TEMPERATURE IN °C
MARKING
PACKAGING
Tube of 50 units
Model, style, resistance value (in Ω), tolerance (in ꢀ),
manufacturing date, VISHAY trademark.
ORDERING INFORMATION
LTO
50
F
2.7 kΩ
1 %
xxx
TU50
e3
MODEL
STYLE CONNECTIONS RESISTANCEVALUE TOLERANCE CUSTOM DESIGN PACKAGING LEAD (Pb)-FREE
1 ꢀ
2 ꢀ
5 ꢀ
Optional
on request:
Special TCR,
shape etc.
10 ꢀ
GLOBAL PART NUMBER INFORMATION
L
T
O
0
5
0
F
2
7
0
0
0
J
T
E
3
GLOBAL
MODEL
LEAD (Pb)-FREE
SIZE
LEADS
OHMIC VALUE
TOLERANCE
PACKAGING
T = Tube
LTO
050
F = Radial leads
The firts four digits are
significant figures and the
last digit specifies the
number of zeros to follow.
R designates decimal point.
F = 1 ꢀ
G = 2 ꢀ
J = 5 ꢀ
K = 10 ꢀ
E3 = Pure tin
Tube 50 pieces
48R70 = 48.ꢁ Ω
48701 = 48 ꢁ00 Ω
10002 = 100 000 Ω
R0100 = 0.01 Ω
R4700 = 0.4ꢁ Ω
27000 = 2ꢁ00 Ω = 2Kꢁ Ω
Document Number: 50050
Revision: 16-Oct-08
For technical questions, contact: sfer@vishay.com
www.vishay.com
3
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
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 herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
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.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
www.vishay.com
1
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