参数资料
| 型号： | 252G |
| 厂商： | Aavid Thermalloy |
| 文件页数： | 2/116页 |
| 文件大小： | 0K |
| 描述： | THERMAL GREASE |
| MSDS 材料安全数据表： | THERMALCOTE 1 MSDS |
| 标准包装： | 1 |
| 系列： | Thermalcote™ |
| 类型： | 硅合成物 |
| 尺寸/尺寸： | 5 磅罐装 |
| 其它名称： | 035347 |
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10
HO
W
T
O
S
ELECT
A
HEA
T
SINK
EUROPE
ASIA
Italy Tel: +39 051 764011 email: sales.it@aavid.com
United Kingdom Tel: +44 1793 401400 email: sales.uk@aavid.com
Singapore Tel: +65 6362 8388 email: sales@aavid.com.sg
Taiwan Tel: +886(2) 2698-9888 email: sales@aavid.com.tw
AMERICA
USA Tel: +1 (603) 224-9988 email: info@aavid.com
www.aavidthermalloy.com
Find a heat sink to keep a TO-220 device below the maximum
150 °C junction temperature in forced convection at 400 ft/min.
Device must be electrically insulated and mounted with a labor
saving clip.
Given:
PD = 12 watts
RθJC = 2.5°C/W (from semiconductor manufacturer)
TJ max = 140°C (from semiconductor manufacturer)
TA max = 50°C
A Hi-Flow pad works great with clip mounting and provides the
necessary electrical insulation. Thermal resistance for
Hi-Flow at low pressure is 1.15°C/W (from page 87).
Using equation 1, solve for RθSA
RθSA = 140 – 50 - (2.5 + 1.15) = 3.85°C/W
12
Many styles are available. If board space is a concern,
533202B02551G (pg 55) meets the requirements.
According to the above graph, an airflow of 400 ft/min results
in a thermal resistance of 3°C/W. This is less than the required
thermal resistance of 3.85°C/W and is therefore acceptable
under these airflow conditions.
If height is a concern, 533702B02552G would meet the
requirements and is only 1.0” tall
Find a space saving heat sink to keep a TO-220 device below the
maximum 150°C junction temperature in natural convection. Device
will be screw mounted with an electrically conductive interface.
Given:
PD = 6 watts
RθJC = 3°C/W (from semiconductor manufacturer)
TJ max = 150°C (from semiconductor manufacturer)
TA max = 65°C
A KonduxTM pad is a good choice for electrically conductive
applications. Thermal resistance for KonduxTM can be determined
from the following graph.
Example B
Example A
Typical TO-220 Performance
Screw Torque (in-lb)
0.00
012
3
4
5
R
(C/W
)
CS
0.10
0.20
0.30
0.40
0.50
0.60
6
How To Select a Heat Sink
At 2 in-lb of torque the thermal resistance
is approximately RθCS = 0.5°C/W
Using equation 1, solve for RθSA
RθSA = 150 – 65 - ( 3 + 0.5) = 10.7°C/W
6
The Index by Heat Sink Style on page 8 lists space saving heat sinks.
Several models are in the 10 °C/W range. Choose the one that best
fits the application and verify thermal resistance from graph.
Part number 593202B03500G shows
a 60 °C temperature rise at 6 watts.
RθSA = 60 = 10.0°C/W
6
Which meets the above requirement in natural convection.
Air Velocity—Feet Per Minute
Heat Dissipated—Watts
Th
ermal
Resistanc
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oAmbien
t—°C/W
at
t
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Moun
ting
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Ri
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A
bo
ve
Ambien
t—°C
Air Velocity—Feet Per Minute
Heat Dissipated—Watts
Th
ermal
Resistanc
eF
rom
MT
G
Sur
fac
et
oAmbien
t—°C/W
at
t
10
0
20
40
60
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02
4
6
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10
8
6
2
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0
400
200
600
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1000
53330X
53320X
Moun
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emp
Ri
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A
bo
ve
Ambien
t—°C
Hi-Flow is a trademark of the Bergquist Company
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 252-GRAY | 功能描述:罩类、盒类及壳类产品 3.25X5.63X2.01 GY RoHS:否 制造商:Bud Industries 产品:Boxes 外部深度:6.35 mm 外部宽度:6.35 mm 外部高度:2.56 mm NEMA 额定值: IP 等级: 材料:Acrylonitrile Butadiene Styrene (ABS) 颜色:Red |
| 252H | 制造商:EBMPAPST 制造商全称:ebm-papst 功能描述:Compact fan with low power consumption |
| 252HX | 制造商:TE Connectivity 功能描述:Electromechanical Relay SPST-NO/SPST-NC 5A 115VAC Flange Mount |
| 252HXPK-2701F | 制造商:Panasonic Industrial Company 功能描述: |
| 252HXPK-2736F | 功能描述:FILTER HELICAL 550MHZ TYPE 7HW RoHS:否 类别:滤波器 >> 螺旋式 系列:7HW 产品目录绘图:7HT Series Side 7HT Series Top 7HT Series Bottom 7HT Series Circuit 标准包装:100 系列:7HT 频率:880MHz 中心 带宽:23MHz 滤波器类型:螺旋形 选择性:10dB (+40MHz) 16dB (-40MHz) 纹波:2dB 插入损耗:3dB 封装/外壳:0.902" L x 0.315" W x 0.579" H（22.90mm x 8.00mm x 14.70mm） 安装类型:通孔 包装:散装 其它名称:302HN-052DTK3404 |
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