Application Note

Description

The outdoor security system equipment must contain protective components, including the system's power lines, signal transmission lines, or other metal cables entering the monitoring room. High potential differences can damage equipment.
protection gesture

Instructions

Antenna ESD(SEH) This is a tooltip 1 of 10 Control Port ESD(MLE) This is a tooltip 2 of 10 LED indication ESD(MLE) This is a tooltip 3 of 10 Button ESD(MLE) This is a tooltip 4 of 10 DC/DC Surge(SHN) This is a tooltip 5 of 10 Network port Surge(SHN) This is a tooltip 6 of 10 AC power Surge(SHV) This is a tooltip 7 of 10 Network port ESD(STN) This is a tooltip 8 of 10 Network port Surge(SHN) This is a tooltip 9 of 10 High speed port ESD/SEH This is a tooltip 10 of 10
Applicable series

Application

Type of surge ESD Surge EFT
Application MLE STN SEH SHV SHN SHC MLC MLA
Standard IEC61000-4-2 IEC61000-4-5 IEC61000-4-4

Product Description

SFI has developed the SHN series of multi-functional overvoltage protectors dedicated to security monitoring. SHN itself has a large capacitance, which can provide better filtering effect for IEEE820.3af requirements. At the same time, SHN provides "ultra-small size SMD patch" packaging, and has "excellent high temperature characteristics" and "passed 10*7100 us surge test Standard”, compared with the current “disadvantages” of “conduction freewheeling” and “poor packaging air leakage” when using GDT in the market, SHN is the best choice for overvoltage components used in security monitoring.

feature comparison

feature comparison

Comparison

SFI

solutions SHN Series

1.SMD package (0806~1812).
2.Specially designed for lightning protection of network ports (RJ45).
3.Common mode test (L-G 1kV~8KV).
4.Extremely low leakage current (<10μA).
5.The response speed is faster than the plug-in MOV (<1ns).
6.High non-linear index α Reaching (above 25).
7.Passed IEC61000-4-5 (10*700us) testing.
8.Good impact ability exceeding 100 times.
9.Compliant with RoHS requirements and lead-free tin furnace.
10.Non polar bidirectional action.
11.Extremely wide operating temperature -55°C to +125°C.
12.Avoid GDT freewheeling performance attenuation.
13.Space saving and competitive advantage.

Other solutions

MOV (Motel Oxide Varistor)

1.Large size of plug-in packaging (5 Å~14 Å).
2.High suppression voltage.
3.Large leakage current (<50μA).
4.Slow reaction speed (>100ns).
5.Severe deterioration phenomenon.
6.Failure modes may lead to combustion phenomena.

TVS(Transient Voltage Suppresor)

1.The static and dynamic overload capacity is poor, and it is easy to be misconducted by interference.
2.Less resistant to continuous impact.
3.Suppression voltage is lower than SHN.
4.Fast reaction speed (<1ns).
5.Not resistant to high temperature environment 125℃.
6.SMD package is larger than SHN.

Application line

Application Circuit

AC Power Surge protection

USB for ESD protection

Connector side for CM mode surge Protection(two pairs)

PoE for DF mode Surge Protection(One pair)

AC Power Surge protection
USB for ESD protection
Connector side for CM mode surge Protection(two pairs)
PoE for DF mode Surge Protection(One pair)
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