Standard

Posted in SHV Series

Surge strikes on short circuit at waveform 8/20μs ( IEC61000-4-5 open circuit waveform 1.2/50μs, short circuit waveform 8/20μs).

Application

Posted in SHV Series

SHV Series- the main application is for surge protection for LED lighting.

Test Standards:
According to the standard IEC61000-4-5, the requirements are 1.20x50us waveform (8x20us waveform) surge wave form, but some countries take different surge waveform as test standard.

Waveform & Impedance:

(1) 1.2x50us and 8x20us (combination)
2 ohm: usually used in power L-N (called line to line)
12 ohm: usually used in power L-N to PE (called line to ground)

1) Line to Ground (L-PE、N-PE ): it is Common Mode.
2) Line to Line (L-NL): it is Differential Mode. Schematic Circuit:

Parameters

Posted in SHV 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 8x20μS)
Surge Voltage A The allowed maximum pulse voltage through components (at 1.2x50us)
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 SHV Series

Model 1210 Series 1812 Series 2220 Series 3220 Series
Length(L) 3.2+0.6/-0.2mm 4.5+0.6/-0.2mm 6.0+0.7/-0.3mm 8.1+0.7/-0.3mm
Width(W) 2.5+0.4/-0.2mm 3.2+0.5/-0.2mm 5.3+0.5/-0.3mm 5.3+0.6/-0.3mm
Thickness(T) 2.60 mm Max 3.50 mm Max 3.60 mm Max 3.70 mm Max
Termination(a) 0.5±0.25mm 0.5+0.35/-0.1mm 0.5+0.35/-0.1mm 0.8+0.5/-0.1mm

Operation Theory

Posted in SHV Series

Compared with other protective components, at stand-by state, the SHV 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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SHV Specification

  • Part Number Working Voltage Breakdown Voltage Clamping Voltage Surge Voltage(8/20us)
    symbol DC V(1mA) V A
    SFI1210SV241-201A
    SFI1210SV391-201A
    210
    320
    240
    390
    <350
    <647
    200A
    200A
  • Part Number Working Voltage Breakdown Voltage Clamping Voltage Surge Voltage(8/20us)
    symbol DC V(1mA) V A
    SFI1812SV471-501A 385 470 <775 500A
  • Part Number Working Voltage Breakdown Voltage Clamping Voltage Surge Voltage(8/20us)
    symbol DC V(1mA) V A
    SFI2220SV391-501A
    SFI2220SV391-801A
    SFI2220SV431-501A
    SFI2220SV431-801A
    SFI2220SV471-501A
    SFI2220SV471-801A
    320
    320
    350
    350
    385
    385
    390
    390
    430
    430
    470
    470
    <647
    <647
    <705
    <705
    <775
    <775
    500A
    800A
    500A
    800A
    500A
    800A
  • Part Number Working Voltage Breakdown Voltage Clamping Voltage Surge Voltage(8/20us)
    symbol DC V(1mA) V A
    SFI3220SV431-801A
    SFI3220SV471-801A
    350
    385
    430
    470
    <705
    <775
    1000A
    1000A
  • 1210
  • 1812
  • 2220
  • 3220