- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371385 > 575D45-12 RELAY SOLID STATE 575V 45A PDF資料下載
參數(shù)資料
| 型號(hào)： | 575D45-12 |
| 英文描述： | RELAY SOLID STATE 575V 45A |
| 中文描述： | 繼電器固態(tài)575V 45A條 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 315K |
| 代理商： | 575D45-12 |
Form 859-990514
SOLID-STATE RELAYS
DATA
SHEET
page 9/12
Opto 22 43044 Business Park Drive Temecula, CA 92590 Phone: (909)695-3000 (800)321-OPTO Fax: (909)695-3095 Internet: www.opto22.com
Inside Sales: (800)452-OPTO Product Support: (800)TEK-OPTO (909)695-3080 Fax: (909)695-3017 E-mail: support@opto22.com FaxBack: (800)474-OPTO
Heat Sink Calculation
Like all semiconductor devices, SSR current
ratings must be based on maximum junction
temperature. All Opto 22 SSRs operate
conservatively at maximum junction temperatures
of 110° C. Determining an adequate heat sink
for a given SSR conducting a given current is
very simple.
Note: Thermally conductive grease must be used
between the relay base and the heat sink.
Sample Calculation Given:
120-Volt, 20-Amp Load
50° C Ambient Air
Choose Model 120D25 SSR.
Calculate dissipation as:
20 amps x 1.3 Watts per amp = 26 Watts
Calculate temperature rise junction to SSR base as:
26 Watts x 1.2° C per Watt = 31.2° C
Calculate allowable temperature of heat sink by subtracting 31.2° C from 110° C allowable junction temperature:
110° C-31.2 = 78.8° C
The heat sink is in a 50°C ambient, therefore, allowable temperature rise on heat sink is:
78.8° C-50° C = 28.8° C
If heat sink is allowed to rise 28.8° C above ambient, then the thermal resistance of the heat sink is simply the 28.8° C rise divided by the 26
Watt. Any heat sink having a thermal resistance less than 1.1° C per Watt will be adequate.
Duty Cycle Calculation
When solid-state relays are operated in an on/off mode, it may be advantageous to calculate the RMS value of the current through the SSR
for heat sinking or determining the proper current rating of the SSR for the given application.
I
RMS
= RMS value of load or SSR
T
1
= Time current is on
T
2
= Time current is off
I
ON
= RMS value of load current during on period
I
RMS
=
(I
ON
)
T
1
+ T
2
2
x T
1
Tips
Applications
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 240NQ035 | 240 AMP SCHOTTKY RECTIFIER |
| 240NQ040 | 240 AMP SCHOTTKY RECTIFIER |
| 240NQ045 | 240 AMP SCHOTTKY RECTIFIER |
| 244NQ035 | 240 AMP SCHOTTKY RECTIFIER |
| 244NQ040 | 240 AMP SCHOTTKY RECTIFIER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 575D45E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| 575-D-5.2 | 制造商:LTA/D-CEMCO 功能描述: |
| 575D5001 | 制造商:NTE 制造商全稱:NTE Electronics 功能描述:5V ACa??DC Switching Power Supply |
| 575D5002 | 制造商:NTE 制造商全稱:NTE Electronics 功能描述:5V ACa??DC Switching Power Supply |
| 575D5003 | 制造商:NTE 制造商全稱:NTE Electronics 功能描述:5V ACa??DC Switching Power Supply |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。