Standard

Posted in SHN Series

IEC61000-4-5
The test requirements:
10x700us surge waveform, but some countries take different surge waveform

1) L-G : Common Mode
2) L-L : Differential Mode

Application

Posted in SHN Series

The Ethernet transmission is easy to strike by surge. Generally, the test requirements are 10x700us surge waveform as test standard. But, some countries take different surge waveform.

1) Line-to-Ground: it is Common Mode
2) Line-to Line: it is Differential Mode

Recommend Circuit:

 

 

1. L-L:TVS suppresses most of surge current to protect transformer from destroyed;Meanwhile, TVS will clamp the differential mode voltage of transformer primary from kV to near 10V to protect the PHY IC on board.
2. L-G:SHN can absorb most of surge current to clamp the common mode voltage of transformer primary from kV to near 30V to protect the PHY IC on board.

Parameters

Posted in SHN Series

Parameter Unit Description (Definition)
Working Voltage V(max) Maximum continuous working voltage: within working temperature, the max. AC volt (RMS) loaded at both ends of component or DC voltage.
Breakdown Voltage V(1mA) At current (1mA), the terminal voltage of component, known as breakdown voltage.
Clamping Voltage V(1A) Loaded with standard current at waveform 8/20us, the maximum voltage of both ends.
Surge Current A The allowed maximum pulse current through components (at 10/700us)
Surge Voltage A The allowed maximum pulse voltage through components ( at 10/700us, 40 ohm)
Non-linear Coefficient (α)   To meet with I-V curve, I1 & I2, V1 & V2, α= log I2/ I1/ logV2/ V1.
Leakage current uA To measure the leakage current at max. continuous working voltage.
Capacitance pF The existed capacitance of component (Typical)
Response Time ns Time for component operation
Operation Ambient Temperature The operating temperature at normal
Storage Temperature The storage temperature for general product

Dimension

Posted in SHN Series

Model 1206 Series 1210 Series 1812 Series 2220 Series
Length(L) 3.2+0.6/-0.2mm 3.2+0.6/-0.2mm 4.5+0.6/-0.2mm 6.1+0.6/-0.2mm
Width(W) 1.6+0.4/-0.2mm 2.5+0.4/-0.2mm 3.2+0.4/-0.2mm 5.2+0.4/-0.2mm
Thickness(T) 1.90 mm Max 2.60 mm Max 3.50 mm Max 3.60 mm Max
Termination(a) 0.50±0.25mm 0.5±0.25mm 0.5±0.25mm 0.5±0.25mm

Operation Theory

Posted in SHN Series

Compared with other protective components, at stand-by state, the SHN series with high impedance (several mega ohms) will not affect the characteristics of circuit design. While an instant surge occurs (over breakdown voltage), the impedance of component becomes low (only a few ohms) to lead the major current through the loop to protect the electronic products or expensive components.

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SHN Specification

  • Part Number Working Voltage Breakdown Voltage Clamping Voltage Surge Voltage(10/700us)
    symbol DC V(1mA) V KV
    SFI0805SN240-1R5K 18 24 <45 1.5KV
  • Part Number Working Voltage Breakdown Voltage Clamping Voltage Surge Voltage(10/700us)
    symbol DC V(1mA) V KV
    SFI1206SN120-040K
    SFI1206SN120-060K
    SFI1206SN240-040K
    SFI1206SN120-060K
    9
    9
    12
    12
    12
    12
    24
    24
    <30
    <30
    <35
    <40
    4KV
    6KV
    4KV
    6KV
  • Part Number Working Voltage Breakdown Voltage Clamping Voltage Surge Voltage(10/700us)
    symbol DC V(1mA) V KV
    SFI1210SN470-040K
    SFI1206SN470-060K
    SFI1206SN750-040K
    SFI1206SN750-060K
    38
    38
    60
    60
    47
    47
    75
    75
    <75
    <75
    <100
    <100
    4KV
    6KV
    4KV
    6KV
  • Part Number Working Voltage Breakdown Voltage Clamping Voltage Surge Voltage(10/700us)
    symbol DC V(1mA) V KV
    SFI1812SN240-080K
    SFI1812SN750-080K
    18
    60
    24
    75
    <45
    <100
    8KV
    8KV
  • 0805
  • 1206
  • 1210
  • 1812