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參數(shù)資料
| 型號： | LTO030F10002FTE3 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | 30 Watt Power Resistor Thick Film Technology |
| 中文描述： | 30瓦功率電阻厚膜技術(shù) |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 85K |
| 代理商： | LTO030F10002FTE3 |
For technical questions, contact sfer@vishay.com
www.vishay.com
15
LTO 30
Vishay Sfernice
Document Number: 50049
Revision 30-May-06
TESTS
CONDITIONS
TYPICAL DRIFTS
Momentary Overload
EN 60115-1
1.5 Pr/5 s
Us < 1.5 UL
± (0.5 % + 0.005
Ω
)
Rapid Temperature Change
EN 60115-1
IERC 60068-2-14 Tests Na
5 cycles
- 55 °C to + 155 °C
± (0.5 % + 0.005
Ω
)
Load Life
EN 60115-1
1000 h Pr at + 25 °C
± (1 % + 0.005
Ω
)
Humidity (Steady State)
MIL STD 202
Method 103 B Cond. D
± (0.5 % + 0.005
Ω
)
Vibration
MIL STD 202
Method 204 Cond. D
± (0.2 % + 0.005
Ω
)
Terminal Strength
MIL STD 202
Method 211 Cond. A1
± (0.2 % + 0.005
Ω
)
Shock
100G, MIL STD 202
Method 213 Cond. I
± (0.5 % + 0.005
Ω
)
PERFORMANCE
30 Watt Power Resistor Thick Film Technology
Resistance Values
≥
0.010
≥
0.015
≥
0.1
≥
0.5
Tolerances
± 1 % at ± 10 %
Coefficient
(- 55 °C/+ 155 °C)
± 900 ppm/°C
± 700 ppm/°C
± 250 ppm/°C
± 150 ppm/°C
SPECIAL FEATURES
Typical Temperature
thermal compound.
P:
Δ
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), the quality of the fastening device, and the thermal resistance of the
expressed in W
Example:
R
TH:
(c-a) for LTO30 power rating 10 W at ambient temperature + 30 °C.
Thermal resistance R
TH
(j-c): 4.2 °C/W
Considering equation (1) we have:
Δ
T = 155 °C - 30 °C = 125 °C
R
TH
(j-c) + R
TH
(c-a) = = 125
R
TH
(c-a) = 12.5 °C/W - 4.2 °C/W = 8.3 °C/W
with a thermal grease R
TH
(c - h) = 1 °C/W, we need a heat sink with R
TH
(h - a) = 7.3 °C/W
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 155 °C. The dissipated power is simply calculated by the following ratio:
P =
Δ
T
[R
TH
(j-c) + R
TH
(c-a)]
Δ
T
P
10
(1)
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