Xiamen SET Electronics Co., Ltd.

V_C

Clamping Voltage

Voltage across TVS in a region of low differential resistance that serves to limit the voltage across the device terminals.

— (IEC 61643-321) 

— (JESD210A)

V_R

Reverse Stand-off Voltage

Maximum voltage that can be applied to the TVS without operation.

NOTE : It is also shown as V_WM (maximum working voltage (maximum d.c. voltage)) and known as rated stand-off voltage (V_so).

— (IEC 61643-321) 

— (JESD210A)

I_R

Reverse Leakage Current

Current measured at V_R.

NOTE : Also shown as I_D for stand-by current. 

— (IEC 61643-321) 

— (JESD210A)

V_BR 

Breakdown Voltage

Voltage across TVS at a specified current I_T in the breakdown region.                                                                                                                            

— (IEC 61643-321) 

— (JESD210A)

I_PPM

Rated Random Recurring Peak Impulse Current 

Maximum-rated value of random recurring peak impulse current that may be applied to a device.

— (IEC 61643-321) 

— (JESD210A)

P_M(_AV)

Rated Average Power Dissipation

Maximum-rated value of power dissipation resulting from all sources, including transients and standby current, averaged over a short period of time.

— (IEC 61643-321) 

— (JESD210A)

P_PPM

Rated Random Recurring Peak Impulse Power Dissipation

Maximum-rated value of the product of rated random recurring peak impulse current (I_PPM) multiplies by specified maximum clamping voltage (V_C).

— (IEC 61643-321) 

— (JESD210A)

C_J

Capacitance

Capacitance across the TVS measured at a specified frequency and voltage

— (IEC 61643-321) 

— (JESD210A)

V_FS

Peak Forward Surge Voltage 

Peak voltage across an TVS for a specified forward surge current (I_FS) and time duration.

NOTE : Also shown as V_F.

— (IEC 61643-321) 

— (JESD210A)

I_FS

Forward Surge Current

Pulsed current through TVS in the forward conducting region.

 NOTE : Also shown as I_F.

— (IEC 61643-321) 

— (JESD210A)

α_V(_BR)

Temperature Coefficient of Breakdown Voltage

The change of breakdown voltage divided by the change of temperature.  

— (IEC 61643-321) 

— (JESD210A)

I_PP

Peak pulse Current

Peak pulse current value applied across the TVS to determine the clamping voltage V_C for a specified wave shape.

— (IEC 61643-321) 

— (JESD210A)

I_T

Pulsed D.C. Test Current

Test current for measurement of the breakdown voltage V_BR. This is defined by the manufacturer and usually 

given in milliamperes with a pulse duration of less than 40 ms.

NOTE : Also shown as I_BR .

— (IEC 61643-321) 

— (JESD210A)

Through Hole, Surface Mount

SMD, Axial

SETsafe | SETfuse Quality Policy

Provide Industry-Leading Products

Raw-materials Supplier

Select critical raw materials: Must be from a manufacturer with quality management system (ISO9001, IATF16949) certification.

Annual or Quarterly Audits.

IQC (Incoming Quality Check)

AQL(MIL-STD-105E), Dimensions, Function, Visual Inspection, RoHS & REACH Test.

Document

Formulate corresponding incoming inspection specifications (01-QA-06-xxx) for each key material according to design data such as material technical indicators.

Testing Equipment and Tools

Tool Microscope, Curve Tracer, X-ray, Salt Spray Tester, Universal Material Testing Machine, Spectrum Analyzer, etc.

Manufacturing Process

Online Inspection and Testing (Function 100% Automatic Testing).

Document

Process Flow Chart.

Failure Mode and Effects Analysis (FMEA).

Quality Control Flow Chart (QCFC).

Standard Inspection Procedure (SIP).

Work Instruction (WI).

Online Testing and Inspection

Leakage, Breakdown Voltage, Surge test system (100% Automatic Testing).

100% Visual inspection, SMD Product 100% AI system.

etc.

IPQC (In Process Quality Control) Inspection

AQL(MIL-STD-105E), Dimensions Inspection, Function Test, Visual Inspection.

FQC ( Final Quality Control)

AQL(MIL-STD-105E), Dimensions Inspection, Function Test, Visual Inspection

Reliability Test

Test specification (01-TE-01-xxx).

Including Electrical Performance, Mechanical Performance, Soldering Performance, Environmental Test and Life Test. e.g in compliance with JEDEC, AEC-Q101 specification.

OQC (Outgoing Quality Control)

AQL(MIL-STD-105E), Packaging, Labeling, Quantity Inspection.

Management System

ISO9001, (TUV approved and issued certificate).

ISO14001, ISO45001, etc.

Click to view the certificate

Environmental

RoHS & REACH Compliant, Halogen Free.

Usage

1. TVS must be operated in the specified ambient temp.

2. Do not clean the TVS with strong polar solvent such as ketone, esters, benzene and halogenated hydrocarbon, to avoid damaging the encapsulating layer.

3.Please do not apply severe vibration, shock or pressure to TVS, to avoid element cracking.

Replacement

1.If TVS is visually damaged, please replace it.

2.TVS is a non-repairable product. For safety sake, please use equivalent TVS for replacement.

Storage

1. Storage Temp. Range: (-55 to 150) °C.

2. Do not store the TVS at the high temp., high humidity or corrosive gas environment, to avoid influencing the

   solder- ability of the lead wires. The product shall be used up within 1 year after receiving the goods.

Environmental Conditions

1. TVS should not be exposed to the open air, nor direct sunshine.

2. TVS should avoid rain, water vapor or other condition of  high temp. and high humidity.

3. TVS should avoid sand dust, salt mist, or other harmful gases.

Max. Typical Capacitance of TVS

The typical capacitance of TVS is listed in the specifications. Designers may refer to it when designing TVS in High frequency circuit.

Installation Mechanical Stress

1.Do not knock TVS when installing, to avoid mechanical damage.

2.Please do not apply severe vibration, shock or pressure to TVS, to avoid surface resin or element cracking.

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