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參數(shù)資料
| 型號： | 1SMC5.0AT3 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 參考電壓二極管 |
| 英文描述： | Zener Transient Voltage Suppressors(齊納擊穿電壓范圍6.8-91V，1500W峰值功率齊納瞬變電壓抑制器) |
| 中文描述： | 1500 W, UNIDIRECTIONAL, SILICON, TVS DIODE |
| 封裝： | PLASTIC, SMC, 2 PIN |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 66K |
| 代理商： | 1SMC5.0AT3 |
GENERAL DATA — 1500 WATT PEAK POWER
Motorola TVS/Zener Device Data
5-4
1500 Watt Peak Power Data Sheet
APPLICATION NOTES
RESPONSE TIME
In most applications, the transient suppressor device is
placed in parallel with the equipment or component to be pro-
tected. 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 induc-
tance of the connection method. The capacitive effect is of mi-
nor 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 compo-
nent 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, typi-
cally < 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 Zin 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 ambi-
ent temperature rises above 25
°
C. The average power derat-
ing 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 Fig-
ure 1 for the same pulse, the results follow the expected trend.
TYPICAL PROTECTION CIRCUIT
Vin
VL
V
Vin
Vin (TRANSIENT)
VL
td
V
VL
Vin (TRANSIENT)
OVERSHOOT DUE TO
INDUCTIVE EFFECTS
tD = TIME DELAY DUE TO CAPACITIVE EFFECT
Figure 5.
t
t
Figure 6.
Zin
LOAD
D
1 ms
10
μ
s
1
0.7
0.5
0.3
0.2
0.05
0.1
0.07
0.01
0.02
0.03
100
μ
s
0.1
0.2
0.5
2
5
10
50
1
20
100
D, DUTY CYCLE (%)
PULSE WIDTH
10 ms
Figure 7. Typical Derating Factor for Duty Cycle
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參數(shù)描述 |
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| 1SMC50CA | 制造商:CENTRAL 制造商全稱:Central Semiconductor Corp 功能描述:BI-DIRECTIONAL GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR 1500 WATTS, 5.0 THRU 170 VOLTS |
| 1SMC51 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:ZENER OVERVOLTAGE TRANSIENT SUPPRESSORS |
| 1SMC51A | 制造商:CENTRAL 制造商全稱:Central Semiconductor Corp 功能描述:UNI-DIRECTIONAL GLASS PASSIVATED JUNCTION TRANSIENT VOLTAGE SUPPRESSOR 1500 WATTS, 5.0 THRU 170 VOLTS |
| 1SMC51A TR13 | 功能描述:TVS DIODE 51VWM 82.4VC SMC 制造商:central semiconductor corp 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:齊納 單向通道:1 雙向通道:- 電壓 - 反向關(guān)態(tài)（典型值）:51V 電壓 - 擊穿（最小值）:56.7V 電壓 - 箝位（最大值）@ Ipp:82.4V 電流 - 峰值脈沖（10/1000μs）:18.2A 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 |
| 1SMC51AT3 | 功能描述:TVS 二極管 - 瞬態(tài)電壓抑制器 51V 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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