WEE Technology Company Limited

WEE Technology Company Limited

Manufacturer of Surface Mounted (SMD) and Through Hole (DIP) Diodes and Rectifiers.

Nowadays, the normal lead time for TVS diodes is about 8 to 12 weeks. Such as P6KE24CA, P6KE33CA, P6KE36CA, P6KE39CA, P4KE and other related TVS products.

However, If you order from WEE Technology, we are able to provide 4 weeks delivery time.

WEET keep regular stock for diode and rectifiers. It will be highly appreciated if you can share your regular buying list with me. I will try my best to quote rock bottom price for your comparison with your current suppliers.

Just takes you one minute to send me the inquiry list, you will gain more than you think. Hope we can cooperate in the near future. Thank you

WEE Technology Related Capacitors Products: 

Audio Capacitors, Tantalum Capacitors, MLCC Ceramic Capacitors, Film MKT/MKP Capacitors, Aluminum Electrolytic Capacitors, Dipped Varistors MOVs 

WEE Technology Company Limited 

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

Important parameters of TVs

A major challenge in automotive design is to protect automotive electronic equipment (such as control units, sensors and entertainment systems) from damaging surges, voltage transients, ESD and power line noise. The use of transient voltage suppressor (TVS) is an ideal solution to protect automotive electronic equipment. Next, we will discuss the key parameters of TVs devices - power level, off state voltage and maximum breakdown voltage.

Power level

The power level of TVs is the surge absorption capacity under specific test or application conditions. Vishay's TVs products use industry standard 10 / 1000 μ s pulse waveform

(Bellcore 1089 standard) as the test condition, as shown in Figure 1. This test condition is different from the 8 / 20 μ s pulse waveform of TVs ESD test

Breakdown voltage (VBR)

The breakdown voltage is the voltage at which the device enters the avalanche breakdown, which is tested according to the current specified in the data sheet.

Maximum breakdown voltage (VC: clamping voltage)

Clamping voltage level that appears on TVs at the specified peak pulse current level. The breakdown voltage of TVs is measured at very low current, such as 1 mA or 10 Ma, which is different from the actual avalanche voltage in application conditions. Therefore, semiconductor manufacturers will indicate typical or maximum breakdown voltage under high current conditions.

Off state voltage (VWM: working off state reverse voltage)

Off state voltage refers to the maximum voltage when TVs is not broken down. It is an important parameter of protection device which does not work under normal conditions. In automotive applications, the regulation of some automotive electronic products is realized by "step protection". This test condition is to supply 24 VDC to 12 V electronic equipment and 36 VDC to 24 V electronic equipment within 10 minutes without causing damage or circuit failure. Therefore, for automotive electronic products, off state voltage is a key parameter of TVs devices.

WEE Technology Company Limited 

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers    

TVS (Transient Voltage Suppressors) diodes, that is, transient voltage suppressors, also known as avalanche breakdown diodes, are single PN junction or multiple PN junction integrated devices made by semiconductor processes. There are unidirectional and bidirectional TVS diodes. Unidirectional TVS diodes are generally used in DC power supply circuits, and bidirectional TVS diodes are used in voltage alternating circuits. When applied to a DC circuit, a unidirectional TVS diode is connected in reverse in parallel to the circuit. When the circuit works normally, the TVS diode is in the off state (high-impedance state), which does not affect the normal operation of the circuit. When the circuit has an abnormal overvoltage and reaches the TVS diode breakdown voltage, the TVS diode quickly changes from a high-resistance state to a low-resistance state, releasing the transient overcurrent caused by the abnormal overvoltage to the ground, and clamping the abnormal overvoltage to Low level, thus protecting the post-stage circuit from abnormal overvoltage. When the abnormal overvoltage disappears, the resistance of the TVS diode returns to a high-impedance state.

First, TVS diode products supplied by WEET can be classified from the package types:

• SMA/DO-214AC：P4SMA6.8CA THRU P4SMA250CA, SMAJ5.0CA THRU SMAJ440CA

• SMB/DO-214AA：P6SMB6.8CA THRU P6SMB250CA, SMBJ5.0CA THRU SMBJ440CA

• SMC/DO-214AB：SMDJ5.0CA THRU SMDJ170CA, SMCJ5.0CA THRU SMCJ440CA

• SOD-123FL：SMF5.0CA THRU SMF220CA

• DO-41：P4KE6.8CA THRU P4KE440CA

• DO-15：P6KE6.8CA THRU P6KE600CA

• DO-27：1.5KE6.8CA THRU 1.5KE440CA

Second Part: What do TVS diode characteristics stand for ?

• Made of semiconductor technology, with high reliability and no damage limit;

• Glass passivation process, accurate on-voltage;

• Large transient power, low capacitance, low leakage current, easy to control clamping voltage;

• Fast response time: usually less than 1.0PS;

• Excellent clamping ability and small breakdown voltage deviation;

• High voltage accuracy, in special applications, higher accuracy can be achieved through process or parameter screening;

• Small size and easy installation;

• unidirectional and bidirectional units;

• Transient power can reach 200W-30000W or even higher under 10 / 1000μs waveform;

• Working voltage range 3.3V ~ 600V, or even higher;

• Diversified package formats

SMD package: SOD-123, SMA / DO-214AC, SMB / DO-214AA, SMC / DO-214AB, DO-218AB, etc.

In-line package: DO-41, DO-15, DO-201,  etc .;

• Halogen-free and RoHS compliant;

Third Part: How to understand TVS diode selection guide?

1) To determine the maximum DC or continuous operating voltage in the protected circuit, the rated standard voltage of the circuit and the "high-end" tolerance;

2) The rated transient power of the TVS tube is greater than the maximum transient surge power that may occur in the circuit;

3) The cut-off voltage of the TVS tube must be greater than the highest working voltage of the circuit being protected;

4) The maximum clamping voltage of the TVS tube should be less than the damage voltage in the protected circuit of the subsequent stage;

5) After determining the maximum clamping voltage of the TVS tube, its peak pulse current should be greater than the transient surge current;

6) For the circuit protection of the data interface, you should also pay attention to the selection of TVS diodes with appropriate capacitance. For example: when the signal frequency or transmission rate is high, a TVS tube with a low capacitance series should be selected;

Fourth Part:  WEET shares the detailed explanation of TVS diode parameters

• VRWM: cut-off voltage, the highest working voltage of TVS diode, the maximum DC voltage or AC peak voltage that can be continuously applied without causing degradation or damage of TVS diode Under VRWM, TVS diodes are not working and are not conducting.

• VC: Clamping voltage. The peak voltage measured across the TVS diode when the peak pulse current IPP of the specified waveform is applied.

• VBR: Breakdown voltage, which is the minimum avalanche voltage of a TVS tube. It refers to the voltage across the TVS measured on the V-I characteristic curve under the specified pulsed DC current IT or the current near the occurrence of avalanche.

• IR: Leakage current, also known as standby current. The maximum current flowing through a TVS diode at a specified temperature and maximum operating voltage is measured at the cutoff voltage.

• IPP: peak pulse current, generally the peak value under 10 / 100μs current waveform.

• IT: Test current.

• C: Capacitance value. For TVS tubes of the same power level, the lower the voltage, the larger the capacitance value. In the protection of communication lines, pay special attention to the capacitance value of the TVS tube.

• Package form: From the package form of the TVS tube, its power can be seen. The chip area of a TVS tube directly determines its power level.

Fifth Part:  How to choose TVS and TVS diode selection precautions

1) The specification manual only gives the absorbed power peak at a specific pulse width, and the pulse width in the actual circuit is variable. There must be a number in the heart, and the wide pulse should be derated.

2) For the protection of small current load circuits, it is necessary to intentionally increase the current limiting resistance;

3) Pay attention to whether the steady-state average power of the TVS diode is within the safe range;

4) Consider temperature changes. Normally, transient suppression diodes work between -55 ° C and 150 ° C. Derating should be applied when the temperature in the circuit is relatively high.

5) The lead length of TVS transient suppression diode should be opposite to the line to be protected.

6) For the protection in the data interface or communication line, TVS diodes with relatively small capacitance values should be selected as much as possible.

7) Most of the DC protection circuits are unidirectional TVS tubes, the AC protection circuits are mostly bidirectional TVS tubes, the multi-channel protection circuits are TVS array devices, and the high-power protection circuits are special protection modules.

8) In the process of using TVS tube, considering the dispersion of TVS, try to reduce the number of serial / parallel.

Sixth Part:  What is TVS diode typical application 

TVS diodes have the advantages of extremely fast response speed, low clamping voltage, precise voltage, etc., so they are used in the field where the protection device is required to be relatively high. Automotive electronics, home, industrial control, lighting, communication, medical and other industries, such as DC power line, RS485 interface, communication power, I / O port, etc.

WEE Technology Company Limited

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

SMB 600W SMBJ Series SMBJ5.0CA THRU SMBJ440CA Transient Voltage Suppressor WEET TVS

WEET SMB 600W SMBJ Series Transient Voltage Suppressor TVS Chinese Factory Compete With Overseas Brands with no shame. 

WEET have superior quality and competitve price. We are moving ahead to 2020 and look foward to more business shars in the overseas market.

https://m.littelfuse.com/~/media/electronics/datasheets/tvs_diodes/littelfuse_tvs_diode_smbj_datasheet.pdf.pdf

https://www.st.com/en/protection-devices/smbj.html

https://www.bourns.com/docs/Product-Datasheets/SMBJ.pdf

https://www.littelfuse.de/products/tvs-diodes/surface-mount/smbj/smbj33ca.aspx

https://rectron.com/public/product_datasheets/smbj.pdf

https://www.diodes.com/assets/product-showcases/Automotive-Grade-SMAJ-SMBJ-SMCJ-3.0SMCJ-TVS-Diodes-NPA-112018.pdf

http://www.avx.com/products/diodes/tvs/smb-package/

https://www.weetcl.com/Transient_Voltage_Suppressors_TVS/SMB_SMBJ_Series.html

https://www.weetcl.com/pdf/WEET_SMB_SMBJ_Series.pdf

WEE Technology Company Limited

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

WEET SMC 3000W SMDJ Series SMDJ5.0CA THRU SMDJ170CA Transient Voltage Suppressor TVS.

As one of the famous TVS Diodes Manufacturer in China, we are proud to indtroduce our SMDJ sereis to you.

https://www.weetcl.com/Transient_Voltage_Suppressors_TVS/SMC_SMDJ_Series.html

https://www.weetcl.com/pdf/WEET_SMC_SMDJ5.0CA_SMDJ170CA-Series.pdf

WEE Technology Company Limited

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

WEET SMC 1500W SMCJ Series SMCJ5.0CA THRU SMCJ440CA Transient Voltage Suppressor TVS factory in China for more than 20 years.  

WEET Chinease Made SMCJ series is designed expecially to protect sensitive electronic equipment from high voltage transients induced by lightning and other transient voltage events during the usage.

TVS devices are ideal for the protection of I/O Interfaces, VCC bus and other vulnerable circuits used in Telecom, Computer, Industrial and Consumer electronic applications.

Transient Voltage Suppression Diodes Surface Mount – 1500W SMCJ series has Uni-directional and Bi-directional two types for choose.

https://www.weetcl.com/pdf/WEET_SMC_SMCJ_Series.pdf

https://www.weetcl.com/Transient_Voltage_Suppressors_TVS/SMC_SMCJ_Series.html

WEE Technology Company Limited 

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

• For surface mounted applications in order to optimize board space

• Low profile package

• Built-in strain relief

• Glass passivated junction

• Low inductance

• Excellent clamping capability

• Repetition rate (duty cycle):0.01%

• Fast response time: typically less than 1.0 ps from 0 volts to BV for unidirectional types

• Typical IR less than 1µA above 10V

• High temperature soldering: 260°C/10 seconds at terminals

• Plastic package has Underwriters Laboratory Flammability Classification 94 V-O

• Case: JEDEC DO214AB. Molded plastic over glass passivated junction

• Terminals: Solder plated, solderable per MIL-STD-750, Method 2026

• Polarity: Color band denoted positive end (cathode)except Bidirectional

WEE Technology Company Limited
Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

Part No.: P6KE200CA , TVS Diode, P6KE Series, Bidirectional 

Series: P6KE6.8A THRU P6KE600A

Package：DO-204AC (DO-15) 

Description：DIODE TVS 200V 600W 5% UNI Axial

Voltage - Reverse Standoff (Typ)：171V 

Voltage - Breakdown：190V 

Power (Watts)：600W 

Polarization：Unidirectional 

Mounting Type：Through Hole 

Brand: WEET 

Origin: Made in China

Common Items: P6KE6.8CA, P6KE16CA, P6KE30CA, P6KE15CA, P6KE120CA, P6KE200CA, P6KE18CA

The P6KE Series is designed specifically to protect sensitive electronics equipment from voltage transients induced by lightning and other transient voltage events. These devices are ideal for the protection of I/O interfaces, Vcc bus and other vulnerable circuits used in telecom, computer, industrial and consumer electronic applications. ...

WEE Technology Company Limited
Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

MAIN FEATURES

• Glass passivated chip junction

• Available in uni-directional and bi-directional

• 1500 W peak pulse power capability with a 10/1000 μs waveform, repetitive rate (duty cycle):0.01 %

• Excellent clamping capability

• Very fast response time

• Low incremental surge resistance

TYPICAL APPLICATIONS

Use in sensitive electronics protection against voltage transients induced by inductive load switching and lighting on ICs, MOSFET, signal lines of sensor units for consumer,computer, industrial, automotive, and telecommunication.

WEE Technology Company Limited
Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

WEET Brief Introduction of Top 10 Transient Voltage Suppressor TVS Diodes Manufactures All Over the World

Transient Voltage Suppressor TVS Diodes is specially designed to protect sensitive electronics from high-voltage transients. WEET TVS diodes can be used in automation filed, our TVS diodes meet the 16949 degree. All the products are Reach and RoHS standard.

Most of the outstanding TVS diodes are overseas brands, but also some of the domestic Chinese brands TVS Diodes pop up with superior quality and attractive price, which can be compared with the overseas brands. But WEET has more advantages than those factories, we made TVS chips ourselves. We can control the quality and cost better by all means. Buy TVS diodes , try WEET. 

https://www.littelfuse.com/products/tvs-diodes.aspx

https://www.bourns.com/resources/rohs/diodes/tvs-diodes

https://www.digikey.com/products/en/circuit-protection/tvs-diodes/144

https://www.hottechsemi.com/pro/Diodes/TVS/

https://www.futureelectronics.cn/c/tvs-diodes/

https://www.semtech.com/products/high-reliability/tvs-diodes

https://www.weetcl.com/Transient_Voltage_Suppressors_TVS/

http://www.avx.com/products/diodes/tvs/

https://www.st.com/en/protection-devices/automotive-protection-devices.html

http://www.goodark.com/en/products/product_category/diodes/transient_voltage_suppressors/

WEE Technology Company Limited
Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

The P6KE Series is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events 

Stand-off voltage range 6.8 to 600 V 

Unidirectional and bidirectional types 

Peak Pulse Power Dissipation by 10x1000μs test waveform: 600W 

Steady State Power Dissipation on inifinite heat sink at TL=75ºC: 5.0W

https://www.weetcl.com/Transient_Voltage_Suppressors_TVS/DO15_P6KE.html

https://www.weetcl.com/pdf/WEET_DO15_P6KE_Series.pdf

WEE Technology Company Limited

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

https://www.weetcl.com/Transient_Voltage_Suppressors/SOD-123FL-200W-SMF5.0CA-THRU-SMF220CA-Transient-Voltage-Suppressor.html

WEE Technology Company Limited
Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

TVS diodes is a kind of ESD protection diodes, which protect sensitive devices from damage or malfunction due to ESD and other surge voltage spikes introduced from I/O ports. WEE Technology TVS diodes are fabricated with a unique and advanced process technology. WEET's TVS diodes provide high ESD tolerance, so we are capable of providing a wide range of TVS diodes suitable in computer products. Please refer to below products application guideline.

http://www.weediode.com/post/WEET_SOD123FL_200W_Transient_Voltage_Suppressor_SMF_eries.html

WEE Technology Company Limited
Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

TVS Diodes, which stands for“Transient Voltage Suppressor”, is a clamping device that limits harmful voltage spikes Silicon Avalanche Diodes. WEET TVS Diodes have many different applications, after many years of experience in manufacturing TVS didoes, now we would like to introduce its consumer applications. All the dates are collected by WEET engineers, hope it is helpful to you when choosing a right WEET TVS diodes.

WEE Technology Company Limited
Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

https://www.weetcl.com/pdf/WEET_DO15_P6KE_Series.pdf

https://www.weetcl.com/Transient_Voltage_Suppressors/DO15_P6KE.html

WEE Technology Company Limited

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes and Rectifiers

WEET SOD-123FL 200W Transient Voltage Suppressor SMF Series

WEE Technology Company Limited
Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

WEET P6KE Series Through Hole Bi-Directional TVS Diode - DO-204AC（DO-15）,Diodes - TVS and ESD Protection

Diode Case Style : JEDEC DO-204AC(DO-15) molded plastic
Polarity : Color band denotes cathode
TVS Polarity:Uni-directional, bi-directional

Trakemark: WEET
Marking: Laser mark type number
No. of Pins:2 Pins and lead free
RoHS Compliant: Yes

Know more about WEE Technology Diodes - TVS and ESD Protection, please check :  https://www.weetcl.com/Transient_Voltage_Suppressors

WEE Technology Company Limited

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

DO-214 is a standard that specifies a group of semiconductor packages for surface mounted diodes. SMA, also known as DO-214AC, is the smallest size in multiple package variants. Uni-directional and bi-directional polarities are available. 

For bidirectional use suffix C for types SMAJ5.0A thru SMAJ440A (e.g. SMAJ5.0CA thru SMAJ440CA) Electrical characteristics apply in both directions.

Transient Voltage Suppressor TVS in SMA package offer excellent clamping capability, low incremental surge resistance and fast response time.

Peak pulse power dissipation with a 10/1000ms wavetorm: Minimum 400Watts

Steady state power dissapation: 5.0 Watt

WEET Best seller of SMAJ Series are : SMAJ5.0CA, SMAJ15CA, SMAJ22CA, SMAJ48CA, SMAJ120CA, SMAJ220CA, SMAJ350CA, SMAJ440CA

Welcome to check more informatoin at WEE Technology offical website : 

http://www.weetcl.com/Transient_Voltage_Suppressors/SMA_SMAJ_Series.html

WEE Technology Company Limited

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

SMC, also known as DO-214AB, is the largest size in multiple package variants for general purpose transient voltage suppression TVS. Capacitance @ Frequency is available in uni-directional and bi-directional polarities.  Bi-directional devices have no polarity indicator

The SMCJ series has been designed to protect sensitive equipment against surges below 1500W and against electro-static discharges according to IEC 61000-4-2, and  Solderable per MIL-STD-202,Method 208.SMCJ are package in SMC (SMC footprint in accordance with IPC 7531 standard).

 1500W Peak Pulse Power Dissipation

 5.0V - 440V Standoff Voltages

 Glass Passivated Die Construction

 Uni- and Bi-Directional Versions Available

 Excellent Clamping Capability

 Fast Response Time

Order WEET 1500W SMCJ Series Transient Voltage Suppressor from us now.

SMCJ5.0CA, SMCJ8.5CA, SMCJ28CA, SMCJ33CA, SMCJ36CA, SMCJ150CA, SMCJ250CA, SMCJ350CA and so on, free smaples are ready.

http://www.weetcl.com/Transient_Voltage_Suppressors/SMC_SMCJ_Series.html

WEE Technology Company Limited

Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

SMB, also known as DO-214AA, is the middle size in multiple package variants. WEE Technology' SMBJ series SMBJ5.0A THRU SMBJ440CAT ransient Voltage Suppressors are designed to regulate voltage, and plastic case material has UL flammability. They have a good electrical performance by using planar die. They are highly reliable and ideally suited for applications such as telecom systems, power supplies, communication systems, computers, automotive systems, and many other industrial/consumer.

MAXIMUM RATINGS AND CHARACTERISTICS

Peak pulse power dissipation with a 10/1000ms wavetorm: Minimum 600 Watt

Steady state power dissapation: 5.0 Watt

SMBJ5.0CA, SMBJ18CA, SMBJ26CA, SMBJ43CA, SMBJ160CA, SMBJ300CA, SMBJ440CA

Datesheet : http://www.weetcl.com/Transient_Voltage_Suppressors/SMB_SMBJ_Series.html