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參數(shù)資料
| 型號(hào)： | 1SMC24 |
| 廠商： | Motorola, Inc. |
| 英文描述： | ZENER OVERVOLTAGE TRANSIENT SUPPRESSORS |
| 中文描述： | 穩(wěn)壓暫態(tài)過電壓抑制器 |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大?。?/td> | 69K |
| 代理商： | 1SMC24 |
1SMC5.0AT3 Series
http://onsemi.com
5
APPLICATION NOTES
RESPONSE TIME
In most applications, the transient suppressor device is
placed in parallel with the equipment or component to be
protected. In this situation, there is a time delay associated
with the capacitance of the device and an overshoot
condition associated with the inductance of the device and
the inductance of the connection method. The capacitive
effect is of minor importance in the parallel protection
scheme because it only produces a time delay in the
transition from the operating voltage to the clamp voltage as
shown in Figure 5.
The inductive effects in the device are due to actual
turn-on time (time required for the device to go from zero
current to full current) and lead inductance. This inductive
effect produces an overshoot in the voltage across the
equipment or component being protected as shown in
Figure 6. Minimizing this overshoot is very important in the
application, since the main purpose for adding a transient
suppressor is to clamp voltage spikes. The SMC series have
a very good response time, typically < 1 ns and negligible
inductance. However, external inductive effects could
produce unacceptable overshoot. Proper circuit layout,
minimum lead lengths and placing the suppressor device as
close as possible to the equipment or components to be
protected will minimize this overshoot.
Some input impedance represented by Z
in
is essential to
prevent overstress of the protection device. This impedance
should be as high as possible, without restricting the circuit
operation.
DUTY CYCLE DERATING
The data of Figure 1 applies for non-repetitive conditions
and at a lead temperature of 25
°
C. If the duty cycle increases,
the peak power must be reduced as indicated by the curves
of Figure 7. Average power must be derated as the lead or
ambient temperature rises above 25
°
C. The average power
derating curve normally given on data sheets may be
normalized and used for this purpose.
At first glance the derating curves of Figure 7 appear to be
in error as the 10 ms pulse has a higher derating factor than
the 10
μ
s pulse. However, when the derating factor for a
given pulse of Figure 7 is multiplied by the peak power value
of Figure 1 for the same pulse, the results follow the
expected trend.
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| 1SMC28AT3 | 1500 Watt Peak Power,Plastic Surface Mount,Zener Transient Voltage Suppressor(塑料表貼封裝，峰值功率1500W，變位電壓28V，齊納瞬變電壓抑制器) |
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| 1SMC24A TR13 | 功能描述:TVS DIODE 24VWM 38.9VC SMC 制造商:central semiconductor corp 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 類型:齊納 單向通道:1 雙向通道:- 電壓 - 反向關(guān)態(tài)（典型值）:24V 電壓 - 擊穿（最小值）:26.7V 電壓 - 箝位（最大值）@ Ipp:38.9V 電流 - 峰值脈沖（10/1000μs）:38.6A 功率 - 峰值脈沖:1500W（1.5kW） 電源線路保護(hù):無 應(yīng)用:通用 不同頻率時(shí)的電容:- 工作溫度:-65°C ~ 150°C（TJ） 安裝類型:表面貼裝 封裝/外殼:DO-214AB，SMC 供應(yīng)商器件封裝:SMC 標(biāo)準(zhǔn)包裝:1 |
| 1SMC24AT3 | 功能描述:TVS 二極管 - 瞬態(tài)電壓抑制器 24V 1500W 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 |
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