参数资料
| 型号： | 1SMC45AT3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 5/7页 |
| 文件大小： | 0K |
| 描述： | TVS 1500W 45V UNIDIRECT SMC |
| 产品变化通告： | Product Obsolescence 06/Oct/2006 |
| 标准包装： | 2,500 |
| 电压 - 反向隔离（标准值）： | 45V |
| 电压 - 击穿： | 50V |
| 功率（瓦特）： | 1500W |
| 电极标记： | 单向 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | DO-214AB，SMC |
| 供应商设备封装： | SMC |
| 包装： | 带卷 (TR) |
1SMC5.0AT3G Series, SZ1SMC5.0AT3G Series
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 m 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.
http://onsemi.com
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 1SMC45AT3G | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1500 Watt Peak Power Zener Transient Voltage Suppressors |
| 1SMC45CA | 制造商:CENTRAL 制造商全称:Central Semiconductor Corp 功能描述:SURFACE MOUNT BI-DIRECTIONAL GLASS PASSIVATED JUNCTION SILICON TRANSIENT VOLTAGE SUPPRESSOR 1500 WATTS |
| 1SMC45CA TR13 | 功能描述:TVS DIODE 45VWM 72.7VC SMC 制造商:central semiconductor corp 系列:- 包装:剪切带（CT） 零件状态:停产 类型:齐纳 单向通道:- 双向通道:1 电压 - 反向关态（典型值）:45V 电压 - 击穿（最小值）:50V 电压 - 箝位（最大值）@ Ipp:72.7V 电流 - 峰值脉冲（10/1000μs）:20.6A 功率 - 峰值脉冲:1500W（1.5kW） 电源线路保护:无 应用:通用 不同频率时的电容:- 工作温度:-65°C ~ 150°C（TJ） 安装类型:表面贴装 封装/外壳:DO-214AB，SMC 供应商器件封装:SMC 标准包装:1 |
| 1SMC48 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:ZENER OVERVOLTAGE TRANSIENT SUPPRESSORS |
| 1SMC48A | 制造商:CENTRAL 制造商全称:Central Semiconductor Corp 功能描述:UNI-DIRECTIONAL GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR 1500 WATTS, 5.0 THRU 170 VOLTS |
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