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SMT50-100 PDF预览

SMT50-100

更新时间： 2024-11-14 22:21:39
品牌 Logo 应用领域
力特 - LITTELFUSE 触发装置硅浪涌保护器
页数 文件大小 规格书
3页 223K
描述
ELECTRICAL CHARACTERISTICS

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中文翻译

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SMT50-100 技术参数

生命周期：Transferred包装说明：,
Reach Compliance Code：unknownECCN代码：EAR99
风险等级：5.44最大转折电压：133 V
通态非重复峰值电流：30 A认证状态：Not Qualified
触发设备类型：SILICON SURGE PROTECTORBase Number Matches：1

SMT50-100 数据手册

 浏览型号SMT50-100的Datasheet PDF文件第2页浏览型号SMT50-100的Datasheet PDF文件第3页 
SMT50  
ELECTRICAL CHARACTERISTICS  
The electrical characteristics of a SMT50 device are similar to  
that of a self-gated Triac, but the SMT50 is a two terminal  
device with no gate. The gate function is achieved by an  
internal current controlled mechanism.  
device is reached (Ibo) which causes the device to switch to a  
fully conductive state such that the voltage across the device  
is now only a few volts (Vt). The voltage at which the device  
switched from the avalanche mode to the fully conductive  
state (Vt) is known as the Breakover voltage (Vbo). When the  
device is in the Vt state, high currents can be diverted  
without damage to the SMT50 due to the low voltage across  
the device, since the limiting factor in such devices is  
dissipated power (V x I).  
Like the T.V.S. diodes, the SMT50 has a standoff voltage (Vrm)  
which should be equal to or greater than the operating  
voltage of the system to be protected. At this voltage (Vrm)  
the current consumption of the SMT50 is negligible and will  
not affect the protected system.  
Resetting of the device to the non-conducting state is  
controlled by the current flowing through the device. When  
the current falls below a certain value, known as the Holding  
Current (Ih), the device resets automatically.  
When a transient occurs, the voltage across the SMT50 will  
increase until the breakdown voltage (Vbr) is reached. At this  
point the device will operate in a similar way to a T.V.S.  
device and is in avalanche mode.  
As with the avalanche T.V.S. device, if the SMT50 is subjected  
to a surge current which is beyond its maximum rating, then  
the device will fail in short circuit mode, ensuring that the  
equipment is ultimately protected.  
The voltage of the transient will now be limited and will only  
increase by a few volts as the device diverts more current. As  
this transient current rises, a level of current through the  
SELECTING A SMT50  
I
1. When selecting a SMT50 device, it is important that  
the Vrm of the device is equal to or greater than the  
the operating voltage of the system.  
V-I Graph illustrating symbols  
Ipp  
and terms for the SMT50 surge  
protection device.  
IBO  
IH  
IRM  
2. The minimum Holding Current (Ih) must be greater  
than the current the system is capable of delivering  
otherwise the device will remain conducting following  
a transient condition.  
V
VRM  
VBR  
VBO  
VR  
COMPLIES WITH THE  
PEAK SURGE  
VOLTAGE  
VOLTAGE  
CURRENT  
ADMISSIBLE  
(A)  
IPP  
NECESSARY  
RESISTOR  
FOLLOWING STANDARDS  
WAVEFORM  
WAVEFORM  
(V)  
(µS)  
(µS)  
(Ω)  
(CCITT) ITU-K20  
(CCITT) ITU-K17  
VDE0433  
1000  
1500  
2000  
2000  
level 3  
level 4  
1500  
800  
10/700  
10/700  
10/700  
1.2/50  
10/700  
1.2/500  
10/160  
10/560  
9/720  
5/310  
5/310  
5/310  
1/20  
25  
38  
50  
50  
50  
100  
75  
55  
25  
-
-
-
VDE0878  
-
IEC-1000-4-5  
5/310  
8/20  
-
-
FCC Part 68, lightning surge  
type A  
10/160  
10/560  
5/320  
12.5  
6.5  
-
FCC Part 68, lightning surge  
type B  
1000  
Bellcore TR-NWT-001089  
first level  
2500  
1000  
5000  
2/10  
10/1000  
2/10  
2/10  
10/1000  
2/10  
150  
50  
11.5  
10  
Bellcore TR-NWT-001089  
second level  
150  
11.5  
CNET  
I31-24  
1000  
0.5/700  
0.8/310  
25  
-
w w w. l i t t e l f u s e . c o m  
48  
123

中文翻译

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