- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄48084 > YD4R POWER/SIGNAL RELAY, 4PDT, MOMENTARY, 0.12A (COIL), 12VDC (COIL), 1440mW (COIL), 5A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT PDF資料下載
參數(shù)資料
| 型號： | YD4R |
| 元件分類： | 功率/信號繼電器 |
| 英文描述： | POWER/SIGNAL RELAY, 4PDT, MOMENTARY, 0.12A (COIL), 12VDC (COIL), 1440mW (COIL), 5A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 3319K |
| 代理商： | YD4R |
Application notes
N°101
DERATING OF CONTACTS FOR DC VOLTAGES
ABOVE NOMINAL RATING
To establish a standard for the derating of relay contacts is, at best, a subjective practice. Limitations are governed by the type
of relay, contact gap, maximum voltage capabilities of the relay contact system, and the contact material.
The most common method is to derate the contacts by use of the Power Formula, using the known current and voltage.
This method is valid only for Resistive Loads, and is an approximation only; keeping in mind the limitations mentioned above.
Power = IE (Current x Voltage)
I2 E2 = 2/3 I1E1
Example:
A designer is working with a 55 volt DC system and has a relay rated at 10 amps resistive at 28 volts DC.
What is the maximum current that can be switched at 55 Vdc.
I1 = 10 Amperes
E1 = 28 VDC
E2 = 55 VDC
I2 = ? (Current ratings at 55 VDC Resistive)
I2 E2 = 2 I1 E1/3
I2 = 2 I1 E1/E23
= 2 (10 x 28)/55 x 3
= 560/165
I2 = 3.4 Amperes at 55VDC
In addition, the user should always be concerned about the following:
1. Derating contacts that are rated for less than 10 Amperes at nominal voltage.
2. Derating contacts for use in system voltages above 130 Volts DC
Date of issue: 6/00
- 14 -
Page 1 of 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| YE4N | POWER/SIGNAL RELAY, 4PDT, MOMENTARY, 0.07A (COIL), 28VDC (COIL), 1960mW (COIL), 5A (CONTACT), 28VDC (CONTACT), SOCKET MOUNT |
| YG2B | POWER/SIGNAL RELAY, 4PDT, MOMENTARY, 0.12A (COIL), 12VDC (COIL), 1440mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| YJ2A | POWER/SIGNAL RELAY, 4PDT, MOMENTARY, 0.07A (COIL), 28VDC (COIL), 1960mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| YJ2N | POWER/SIGNAL RELAY, 4PDT, MOMENTARY, 0.07A (COIL), 28VDC (COIL), 1960mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| YJ2V | POWER/SIGNAL RELAY, 4PDT, MOMENTARY, 0.24A (COIL), 6VDC (COIL), 1440mW (COIL), 5A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| YD5020 | 制造商:YOUDA 制造商全稱:Wuxi Youda electronics Co.,LTD 功能描述:LOW VOLTAGE COMPANDER |
| YD502EW024R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PULSE CAPACITORS FOR FLASH LAMP APPLICATIONS |
| YD502EW056R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PULSE CAPACITORS FOR FLASH LAMP APPLICATIONS |
| YD5104 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8.2W BTL AUDIO POWER AMPLIFIER |
| YD5265 | 制造商:YOUDA 制造商全稱:Wuxi Youda electronics Co.,LTD 功能描述:TV SOUND OUTPUT CIRCUIT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。