參數(shù)資料
型號： 507102B00000G
廠商： Aavid Thermalloy
文件頁數(shù)： 13/116頁
文件大?。?/td> 0K
描述： HEATSINK TO-220 EXT CAP 2W
產(chǎn)品培訓(xùn)模塊： How to Select a Heat Sink
產(chǎn)品目錄繪圖： 507102B00000G
標(biāo)準(zhǔn)包裝： 1,000
類型： 插件板級
冷卻式包裝： TO-220
固定方法： 把緊螺栓
形狀： 矩形
長度： 0.700"（17.78mm）
寬： 1.750"（44.45mm）
機(jī)座外的高度（散熱片高度）： 0.500"（12.70mm）
溫升時的功耗： 4W @ 40°C
在強(qiáng)制氣流下的熱敏電阻： 在 200 LFM 時為5.0°C/W
自然環(huán)境下的熱電阻： 15.6°C/W
材質(zhì)： 鋁
材料表面處理： 黑色陽極化處理
其它名稱： 507102B00000
5071B
6071B
HS113
11
READING
A
T
HERMAL
PERFORMANCE
GR
APH
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
The performance graphs you will see in this
catalog (see graph 579802) are actually a
composite of two separate graphs which
have been combined to save space. The small
arrows on each curve indicate to which axis
the curve corresponds. Thermal graphs are
published assuming the device to be cooled
is properly mounted and the heat sink is in
its recommended mounting position.
GRAPH A is used to show heat sink perform-
ance when used in a natural convection envi-
ronment (i.e. without forced air). This graph
starts in the lower left hand corner with the
horizontal axis representing the heat dissipa-
tion (watts) and the vertical left hand axis
representing the rise in heat sink mounting
surface temperature above ambient (°C). By
knowing the power to be dissipated, the
temperature rise of the mounting surface
can be predicted. Thermal resistance in natu-
ral convection is determined by dividing this
temperature rise by the power input (°C/W).
EXAMPLE A: Aavid Thermalloy part number
579802 is to be used to dissipate 3 watts of
power in natural convection. Because we are
dealing with natural convection, we refer to
graph “A”. Knowing that 3 watts are to be dis-
sipated, follow the grid line to the curve and
find that at 3 watts there is a temperature
rise of 75°C. To get the thermal resistance,
divide the temperature rise by the power
dissipated, which yields 25°C/W.
GRAPH B is used to show heat sink per-
formance when used in a forced convec-
tion environment (i.e. with forced air flow
through the heat sink). This graph has its
origin in the top right hand corner with
the horizontal axis representing air velocity
over the heat sink LFM* and the vertical
axis representing the thermal resistance of
the heat sink (°C/W). Air velocity is calculat-
ed by dividing the output volumetric flow
rate of the fan by the cross-sectional area
of the outflow air passage.
EXAMPLE B: For the same application
we add a fan which blows air over the heat
sink at a velocity of 400 LFM.
The addition of a fan indicates the use of
forced convection and therefore we refer
to graph “B”. This resistance of 9.50°C/W is
then multiplied by the power to be dissi-
pated, 3 watts. This yields a temperature
rise of 28.5°C.
CONVERTING VOLUME
TO VELOCITY
Although most fans are normally rated and
compared at their free air delivery at zero
back pressure, this is rarely the case in most
applications. For accuracy, the volume of
output must be derated 60%–80% for
the anticipation of back pressure.
EXAMPLE: The output air volume
of a fan is given as 80 CFM. The output area
is 6 inches by 6 inches or 36 in2 or 25 ft2.
To find velocity:
80
0.25
Velocity is 320 LFM, which at 80%,
derates to 256 LFM.
DESIGN ASSISTANCE
Aavid Thermalloy can assist in the design
of heat sinks for both forced and natural
convection applications. Contact us for help
with your next thermal challenge. For more
information, visit our web site at:
www.aavidthermalloy.com
Heat Dissipated—Watts
0
20
40
60
80
100
01
2
3
4
5
Mounting
Surface
Temp
Rise
Above
Ambient—
°
C
Air Velocity—Feet Per Minute
Thermal
Resistance
From
MTG
Surface
to
Ambient—
°
C/Watt
20
16
12
4
8
0
400
200
600
800
1000
GRAPH B
Velocity (LFM) =
Velocity =
= 320
Air Velocity—Feet Per Minute
Heat Dissipated—Watts
Thermal
Resistance
From
MTG
Surface
to
Ambient—
°
C/Watt
20
0
20
40
60
80
100
01
2
3
4
5
16
12
4
8
0
400
200
600
800
1000
Mounting
Surface
Temp
Rise
Above
Ambient—
°
C
GRAPH A
579802
Reading a Thermal Performance Graph
Velocity
(LFM)* = Volume (CFM)**
area (ft2)
* Linear feet per minute
** Cubic feet per minute
Volume (CFM)
area (ft2)
相關(guān)PDF資料
PDF描述
5917631-1 CONN PLUG FH 40POS .050 VERT
1-480634-9 STRAIN RELIEF 20POS MR
SOMC160382R0GEA RES ARRAY 82 OHM 8 RES 16-SOIC
SOMC16036K80GEA RES ARRAY 6.8K OHM 8 RES 16-SOIC
5-5179233-9 CONN RECPT 180POS .8MM DUAL SMT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
507102J00000 制造商:Aavid Thermalloy 功能描述:- Bulk 制造商:Aavid Thermalloy 功能描述:Heat Sink Passive TO-220 15.6°C/W Pre-Black Anodized
507-103 制造商:Abbatron/HH Smith 功能描述:
507-104NF09 功能描述:D-Sub后殼 RoHS:否 制造商:Amphenol Commercial Products 類型:Two Piece Backshell 電纜引入數(shù)量:1 電纜引入角:Straight 系列:17E 電纜直徑: 位置數(shù)量:9 外殼大小:E 外殼電鍍:Zinc
507-1057 制造商:SPC Multicomp 功能描述:SOLDER WIRE 60/40 0.5MM 250G 制造商:SPC Multicomp 功能描述:SOLDER WIRE, 60/40, 0.5MM, 250G 制造商:SPC Multicomp 功能描述:SOLDER WIRE, 60/40, 0.5MM, 250G; External Diameter - Metric:0.5mm; External Diameter - Imperial:0.02"; Solder Alloy:60, 40 Sn, Pb; Melting Temperature:180C; Weight:250g; SVHC:No SVHC (19-Dec-2012); Bit Temperature:308C; External ;RoHS Compliant: No
507-105M09 功能描述:D-Sub后殼 COMMERCIAL RoHS:否 制造商:Amphenol Commercial Products 類型:Two Piece Backshell 電纜引入數(shù)量:1 電纜引入角:Straight 系列:17E 電纜直徑: 位置數(shù)量:9 外殼大小:E 外殼電鍍:Zinc
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