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參數(shù)資料
| 型號： | SA48ARL |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 參考電壓二極管 |
| 英文描述： | 500 Watt Peak Power MiniMOSORB Zener Transient Voltage Suppressors |
| 中文描述： | 500 W, UNIDIRECTIONAL, SILICON, TVS DIODE |
| 封裝： | PLASTIC, CASE 59AA-01, SIMILAR TO DO-204AC, MINIMOSORB, 2 PIN |
| 文件頁數(shù)： | 5/5頁 |
| 文件大小： | 97K |
| 代理商： | SA48ARL |
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TVS APPLICATION NOTES:
Transient Voltage Suppressors may be used at various points in a circuit to provide various degrees of
protection. The following is a typical linear power supply with transient voltage suppressor units placed at
different points. All provide protection of the load.
FIGURE 1
Transient Voltage Suppressors 1 provides maximum protection. However, the system will probably require
replacement of the line fuse(F) since it provides a dominant portion of the series impedance when a surge is
encountered.
However, we do not recommend to use the TVS diode here, unless we can know the electric circuit
impedance and the magnitude of surge rushed into the circuit. Otherwise the TVS diode is easy to be
destroyed by voltage surge.
Transient Voltage Suppressor 2 provides execllent protection of circuitry excluding the transformer(T).
However, since the transformer is a large part of the series impedance, the chance of the line fuse opening
during the surge condition is reduced.
Transient Voltage Suppressor 3 provides the load with complete protection. It uses a unidirectional
Transient Voltage Suppressor, which is a cost advantage. The series impedance now includes the line fuse,
transformer, and bridge rectifier(B) so failure of the line fuse is further reduced. If only Transient Voltage
Suppressor 3 is in use, then the bridge rectifier is unprotected and would require a higher voltage and current
rating to prevent failure by transients.
Any combination of these three, or any one of these applications, will prevent damage to the load. This would
require varying trade-offs in power supply protection versus maintenance(changing the time fuse).
An additional method is to utilize the Transient Voltage Suppressor units as a controlled avalanche bridge.
This reduces the parts count and incorporates the protection within the bridge rectifier.
FIGURE 2
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SA48A-TP | 制造商:Micro Commercial Components (MCC) 功能描述:Diode TVS Single Uni-Dir 48V 500W 2-Pin DO-15 T/R |
| SA48ATR | 制造商:World Products 功能描述: |
| SA48C | 功能描述:TVS 二極管 - 瞬態(tài)電壓抑制器 SA48C Bi-Directional RoHS:否 制造商:Vishay Semiconductors 極性:Bidirectional 工作電壓: 擊穿電壓:58.9 V 鉗位電壓:77.4 V 峰值浪涌電流:38.8 A 系列: 封裝 / 箱體:DO-214AB 最小工作溫度:- 55 C 最大工作溫度:+ 150 C |
| SA48C _AY _10001 | 制造商:PanJit Touch Screens 功能描述: |
| SA48C/TR12 | 制造商:Microsemi Corporation 功能描述:TRANSIENT VOLTAGE SUPPRESSOR - Tape and Reel |
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