We are WEE, We Enhance Efficiency   

Year Established: 2000

Headquarter: Hongkong

Employees: 500

Products: General Purpose Rectifier, Fast Recovery Rectifier, Transient Voltage Suppressor, Schottky Rectifier, Switching Diode, Zener Diode...

Application: Automotive, Consumer, Computer, Lighting, Communication, Energy Harvesting, and Smart Grid...

Market: America, Europe, Asia, South Africa and Mid. East...

Advantages: Considerate Service, Competitive Offer, Credible Quality & Lead Time...

Catalogue: https://www.weediode.com/WEE-Technology-Company-Limited-Catalogue-Diode-Rectifier-Transistor.pdf

Presentation: https://www.weediode.com/WEE-Technology-Company-Limited-Presentation.pdf

REACH: https://www.weetcl.com/pdf/WEE-Technology-Diodes-Rectifiers-RoHS-II-2023.pdf

ROHS: https://weetcl.com/pdf/WEE-Technology-Diodes-Rectifiers-REACH-2023.pdf

Website: www.weetcl.com

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Written by WEE Technology Company Limited

MURS140 400V 1A

MURS160 600V 1A

DATASHEET: https://weetcl.com/pdf/WEET_SMB_MURS140_THRU_MURS160.pdf

FEATURES 

Low forward voltage drop

High current capability

Low power loss, high efficiency

High reliability

High surge current capacity

High temperature soldering guaranteed

MECHANICAL DATA 

Case: Mold plastic

Epoxy: UL94V-0 rate flame retardant

Polarity: Color band denotes cathode end

Lead: Plated axial lead, solderable per MIL-STD-202E method 208C

Mounting position: Any

Weight: 0.042ounce, 1.19 gram 

MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS

Ratings at 25℃ ambient temperature unless otherwise specified

Single phase, half wave, 60Hz, resistive or inductive load

For capacitive load derate current by 20% 

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1、 Different structures

The diode rectifier structure is simple and consists of two different types of semiconductor materials, P-type and N-type. The bridge rectifier connects four diodes in series to form a whole. There are also two different semiconductor materials, P-type and N-type, inside the bridge rectifier, but they are connected together differently to form a four way rectifier circuit.

2、 Different functions

Diode rectifiers have a single conductivity and can only conduct electricity during forward bias, while blocking the passage of current during reverse bias. Its main function is to act as a rectifier, converting AC signals into DC electrical signals for subsequent circuit use.

The bridge rectifier can also achieve unidirectional current conduction, but due to the internal composition of four diodes, it can achieve a more complete rectifier circuit. Its main function is to rectify the AC signal into a complete sine wave, while also rectifying negative signals into positive values.

3、 Different application fields

Due to the fact that diode rectifiers can only perform half wave rectification conversion, their application range is relatively narrow, mainly used in low-power circuits, such as small power supplies. The bridge rectifier can achieve full wave rectification, so its application fields are more extensive and can be applied in high-power circuits, such as electronic power supplies and other fields that require high current.

4、 Different stability

There is only one PN junction inside the diode rectifier, so it is prone to failure in environments such as high temperature, high voltage, and high frequency. The bridge rectifier is composed of multiple diodes as a whole, so its stability is higher compared to a single diode.

In summary, although diode rectifiers and bridge rectifiers are commonly used components in circuits, there are significant differences in structure, function, application, and stability. When selecting circuit components, specific types of components need to be selected according to actual needs.

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WEET Bridge Rectifier Diode Rectifier Cross Reference PANJIT Taiwan Semiconductor GI MOTOROLA IR FUJI FAGOR LITE-ON

Free samples support your alternative projects, it's encouraging to reduce the cost, and we ensure the quality at the same time.

Never hesitate to contact us for cost-effective solutions.

More cross reference: http://www.weediode.com/zb_users/upload/2023/8/WEET-Bridge-Rectifier-Diode-Rectifier-Cross-Reference.pdf

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Applications:

General regulation functions in Drone, DVR, Security, Wifi routedr, Navigation, Smart home, Industrical Control, Medical Equipment...

Low-power voltage regulator diodes in small hermetically sealed glass LL-34 Surface-Mounted Device (SMD) packages. 

Available in the normalized ±2 % (BZV55B) and approximately ±5 % (BZV55C) tolerance range. 

The series consists of 37 types with nominal working voltages from 2.4V to 75V.

BZV55B2V4

BZV55B2V7

BZV55B3V0

BZV55B3V3

BZV55B3V6

BZV55B3V9

BZV55B4V3

BZV55B4V7

BZV55B5V1

BZV55B5V6

BZV55B6V2

BZV55B6V8

BZV55B7V5

BZV55B8V2

BZV55B9V1

BZV55B10

BZV55B11

BZV55B12

BZV55B13

BZV55B15

...

BZV55B75

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1、 What type of diode is LL4148?

LL4148 is a small single switch diode that, like most diodes, only allows current to flow in one direction. LL4148 is a silicon epitaxial planar diode with cathode strip identification, using a glass encapsulated version.

LL4148 has high conductivity and reliability, characterized by a fast recovery time of 8ns to 4ns only at a forward current of 300mA. Therefore, LL4148 diodes are used for fast switching.

The main use of the LL4148 diode is for fast switching, as well as various other projects such as heat monitoring, detecting LED status, and controlling another circuit.

Compared to standard silicon diodes, the LL4148 diode can ensure better performance in high-frequency applications.

2、 Characteristics of LL4148

Silicon Epitaxial Planar Diode

High conductivity

High reliability

Unleaded

Same electrical data as 1N4448 and 1N4148

Fast recovery time (8ns-4ns)

3、 LL4148 pin arrangement

The LL4148 pin arrangement is shown in the figure:

Anode: Current always enters through the anode

Cathode: Current always flows out through the cathode

4、 Equivalence and Replacement of LL4148

(1). LL4148 Equivalent

BAS32, 1N4148, 1N4448, 1N4154

(2). LL4148 Replacement

DL4148DIODES, FDLL4148_ NLDIODES, 933930220135DIODES, LL4148-CDIODES, LL4148-T1-LFDIODES

5、 LL4148 Application

Relay isolation

Speed switch

signal processing

Can be used to prevent reverse polarity issues

Protection of power electronic switches operating at high switching frequencies

Used as a protective device

Current regulator

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WEE Technology Catalog Quick Access in Different Languages:

https://weetcl.com/pdf/WEET-Company-Profile-In-English.pdf

https://weetcl.com/pdf/WEET-Company-Profile-In-Russian.pdf

https://weetcl.com/pdf/WEET-Firmen-Profil-in-Deutsch-German.pdf

https://weetcl.com/pdf/WEET-Perfil-da-Empresa-em-in-Portuguese.pdf

WEE Technology Company Limited is a marketing office established in Hong Kong since 2000. We are specialized in manufacturing diodes and bridge rectifiers, both in surface mount and through hole Type, which including Zener Diodes,Switching Diodes,Bridge Rectifiers,General Rectifier Diodes,Fast Recovery Rectifiers,High Efficient Rectifiers,SchottkyBarrier Rectifiers,Transient Voltage Suppessors,Super Fast Recovery Rectifiers,Small Signal Transistors.

Products are wildly used in automotive, energy saving lamp rectifier, computer peripherals, communications equipment, household appliances, aerospace products, medical devices, solar photovoltaic industry and other fields. 

WEET is in full charge of supporting and handling all the affairs and business development of the overseas customers from our mainland factories. WEET owns two factories with more than 500 workers, which located in Jiangsu and Anhui province of China. WEET factories are endowed with ISO-9001:2008 and ISO14001: 2004 quality management certifications. WEET Jiangsu factory was set up in 2001, which specializing in diodes and rectifiers products, mainly including SMAF, SMA-J, SMA, SMB, SMC, DO-15, DO-27, DO-41, A-1, R-6 package and so on. WEET Anhui factory is the expertise in bridgerectifierssince1998. Bridge rectifiers current range from 0.5A to 50A, voltage range from 50V to 1000V, most common package are MINIDIP,DB,WOM,MBS, MBF, KBP, GBP, GBL, S25VB, TO-220, KBL, KBU, GBU, GBJ, KBPC, GBPC and so on.All of our products aremeeting RoHS 2.0 and Reach standard. From the design and manufacture of components, as well as the GPP chips, WEET is providing one-stopservices. We Enhance Efficiency.

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DBF301 thru DBF310 Single Phase Glass Passivated Bridge Rectifiers

Datasheet: https://www.weediode.com/zb_users/upload/2023/2/WEET_DBF301_thru_DBF310_Single_Phase_Glass_Passivated_Bridge_Rectifiers.pdf

Application: Suitable for AC to DC bridge full wave rectification for SMPS, LED lighting, adapters, battery chargers, home appliances, office equipment, and telecommunication applications.

Popular Part: DBF310

Type: Single Phase Bridge

Mounting Style: SMD/SMT

Package / Case: DBF

If - Forward Current: 3 A

Peak Reverse Voltage: 1 kV

Vf - Forward Voltage: 1.1 V

Max Surge Current: 80 A

Minimum Operating Temperature: - 55 C

Maximum Operating Temperature: + 150 C

Length: 8.15 mm

Width: 6.35 mm

Height: 2.35 mm

Packaging: TapeReel

Ir - Reverse Current: 10 uA

Product Type: Bridge Rectifiers

Subcategory: Diodes & Rectifiers

Vr - Reverse Voltage: 1 kV

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A NPN transistor is one in which the majority current carrier are electrons. Electron flowing from the emitter to the collector forms the base of the majority of current flow through the transistor. The other type of charge, holes, are a minority. 

Description: Bipolar Transistors - BJT BC846W/SOT323/SC-70

Product Category: Bipolar Transistors - BJT

Technology: Si

Mounting Style: SMD/SMT

Packaging: TapeReel

Package/Case: SOT-323

Transistor Polarity: NPN

Configuration: Single

Collector- Emitter Voltage VCEO Max: 65 V

Collector- Base Voltage VCBO: 0 V

Emitter- Base Voltage VEBO: 6 V

Collector-Emitter Saturation Voltage: 250 mV

Maximum DC Collector Current: 100 mA

Pd - Power Dissipation: 200 mW

Gain Bandwidth Product fT: 100 MHz

Operating Temperature: - 55 C +150 C

Height: 1.1 mm

Length: 2.2 mm

Width: 1.35 mm

Datasheet: https://www.weediode.com/zb_users/upload/2023/5/WEET_BC846W_BC850W_NPN_Silicon_Epitaxial_Planar_Transistor.pdf

Other popular NPN transistors:

SOT-23(TO-236) MMBT9018 (MMBT9018G, MMBT9018H) NPN Silicon Epitaxial Planar Transistors 30V Small Signal Bipolar (BJT) Transistors

Datasheet: https://weetcl.com/pdf/WEET_Transistors_SOT-23_MMBT9018.pdf

SOT-23(TO-236) MMBT9014 (MMBT9014B, MMBT9014C, MMBT9014D) NPN 50V Power Transistors Dual Transistors Small Signal (BJT) Transistors

Datasheet: https://weetcl.com/pdf/WEET_Transistors_SOT-23_MMBT9014.pdf

SOT-23(TO-236) MMBT9013 (MMBT9013G, MMBT9013H) SMT NPN Transistor 30V to 50V Dual Transistors Small Signal (BJT) Transistors

Datasheet: https://weetcl.com/pdf/WEET_Transistors_SOT-23_MMBT9013.pdf

SOT-23(TO-236) MMBT8050 (MMBT8050C, MMBT8050D) General Purpose Transistors 40V SMD NPN Bipolar (BJT) Transistors

Datasheet: https://weetcl.com/pdf/WEET_Transistors_SOT-23_MMBT8050.pdf

SOT-23(TO-236) MMBT3904 General Purpose Transistors NPN Transistor 350mW PNP Small Signal Bipolar (BJT) Transistors

Datasheet: https://weetcl.com/pdf/WEET_Transistors_SOT-23_MMBT3904.pdf

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2N7002 Basic Parameters:

A type of IC product model

Transistor polarity: N-channel

Drain current, Id maximum value: 200mA

Voltage, Vds max: 60V

Open state resistance, Rds (on): 5.4ohm

Voltage @ Rds measurement: 10V

Voltage, Vgs max: 2.1V

Power consumption: 0.32W

Working temperature range: -55 to 150

Package type: SOT-23

Pin count: 3

SVHC (Temperature Concerned Substances): Cobalt dichloride

SMD label: 702/7002/K72/S72/3PG (2N7002G)/3PL (2N7002L)/72wll

Power, Pd: 0.32W

Outer width: 3.0mm

External depth: 2.5mm

External length/height: 1.1mm

Package type: SOT-23

Belt width: 9mm

Number of transistors: 1

Transistor type: MOSFET

Temperature @ current measurement: 25 ° C

Full power temperature: 25 ° C

Voltage Vgs @ Rds on measurement: 20V

Voltage, Vds typical value: 60V

Current, Id continuous: 0.2A

Current, Idm pulse: 0.5A

Surface Mount Devices: Surface Mount

On state resistance, Rds on @ Vgs=10V: 2.8ohm

On state resistance, Rds on @ Vgs=5V: 3.1ohm

On state resistance, Rds on @ Vgs=4.5V: 3.2ohm

Threshold voltage, Vgs th min value: 1.1V

Threshold voltage, Vgs th max value: 2.1V

SVHC (Substances of High Concern) (Additional): Bis (2-ethyl (hexyl) phthalate) (DEHP) 

Description: 200mA, 60V, N-CHANNEL, Si, SMALL Signal, MOSFET package: SOT-23, 3 PIN

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Method for detecting the quality of diodes:

1. Detection of ordinary diodes: (including detector diodes, rectifier diodes, damping diodes, switching diodes, and freewheeling diodes) is a semiconductor device composed of a PN structure with unidirectional conductivity characteristics. By using a multimeter to detect its forward and reverse resistance values, the electrode of the diode can be identified, and it can also be estimated whether the diode is damaged.

https://weetcl.com/High_Speed_Switching_Diodes/

2. Detection of zener diode: Connect the positive terminal of the megohmmeter to the negative terminal of the zener diode, and connect the negative terminal of the megohmmeter to the positive terminal of the zener diode. Shake the handle of the megohmmeter at a constant speed according to regulations, and monitor the voltage values at both ends of the zener diode with a multimeter (the voltage range of the multimeter should depend on the size of the stable voltage value). When the voltage indication on the multimeter is stable, This voltage value is the stable voltage value of the zener diode. If the stable voltage value of the zener diode is measured to fluctuate, it indicates that the diode is unstable.

https://weetcl.com/Silicon_Planar_Zener_Diodes/

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Diode is an electronic device made of semiconductor materials (silicon, selenium, germanium, etc.). Diode has two electrodes, the positive electrode, also known as the anode; The negative electrode, also known as the cathode, conducts when a forward voltage is applied between the two poles of the diode, and turns off when a reverse voltage is applied. The conduction and cutoff of a diode are equivalent to the on and off of a switch.

Diodes have unidirectional conductivity, and during conduction, the current direction flows from the anode to the cathode through the tube.

Diodes are one of the earliest semiconductor devices, and their applications are very extensive. Especially in various electronic circuits, reasonable connections between diodes, resistors, capacitors, inductors, and other components can be used to form circuits with different functions, which can achieve various functions such as AC rectification, detection of modulated signals, limiting and clamping, and voltage stabilization of power supply.

Whether it is in common radio circuits, other household appliances or industrial control circuits, the traces of diodes can be found.

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Which parts do sell very good recently? please refer to below form, you can get the goods or samples in very short time. Never hesitate to seek more support.

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WEET is specialized in manufacturing Small Signal Transistors also called as Bipolar Junction Transistors.

Bipolar Junction Transistors are transistors which are made up of 3 regions, the base, the collector, and the emitter. 

Bipolar junction transistors come in two main types, NPN and PNP. 

NPN transistor is one in which the majority current carrier are electrons. Electron flowing from the emitter to the collector forms the base of the majority of current flow through the transistor. The other type of charge, holes, are a minority. 

PNP transistors are the opposite. In PNP transistors, the majority current carrier are holes.

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We continue the uploading of popular rectifiers datasheets, which products' parameteters do you need? feel free to contact us for more technical details.

http://www.weediode.com/DATASHEETS.html

Recent popular part:

WEET DBF301 thru DBF310 Single Phase Glass Passivated Bridge Rectifiers

3A 1000V        DBF310 DBF TR        1.5K/REEL

datasheet: http://www.weediode.com/zb_users/upload/2023/2/WEET_DBF301_thru_DBF310_Single_Phase_Glass_Passivated_Bridge_Rectifiers.pdf

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WEET wishing you a happy Spring Festival, prosperous financial resources, all the best, family happiness!

Much joy to you in the new year of 2023. May the warmest wishes, happy thoughts and friendly greetings come at New Year and stay with you all the year through.

Please kindly be noted WEE Technology Company Limited Holiday as below:

Holiday Time: From 9th Jan to 31st Jan. 2023

Resume Work: 1st Feb. 2023

We will check your emails and reply you at our earliest when we resume work. Thank you to all of you.

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WEE Technology Company Limited is specialized in manufacturing diodes and bridge rectifiers.Our products are including Zener Diodes,Switching Diodes,Bridge Rectifiers,General Rectifier Diodes,Fast Recovery Rectifiers,High Efficient Rectifiers,Schottey Barrier Rectifiers,Transient Voltage Suppressors,Super Fast Recovery Rectifiers,Small Signal Transistors.

Recent best sellers:

RS3M

SMB(DO-214AA) RS3A THRU RS3M (RS3A, RS3B, RS3D, RS3G, RS3J, RS3K, RS3M）Surface Mount Fast Recovery Rectifier

https://weetcl.com/pdf/WEET_SMB_RS3A_THRU_RS3M.pdf

SMC(DO-214AB) RS3A THRU RS3M (RS3A, RS3B, RS3D, RS3G, RS3J, RS3K, RS3M）Surface Mount Fast Recovery Rectifier

https://weetcl.com/pdf/WEET_SMC_RS3A_THRU_RS3M.pdf

RS2M

SMA(DO-214AC) RS2A THRU RS2M (RS2A, RS2B, RS2D, RS2G, RS2J, RS2K, RS2M）Surface Mount Fast Recovery Rectifier

https://weetcl.com/pdf/WEET_SMA_RS2A_THRU_RS2M.pdf

SMB(DO-214AA) RS2A THRU RS2M (RS2A, RS2B, RS2D, RS2G, RS2J, RS2K, RS2M）Surface Mount Fast Recovery Rectifier

https://weetcl.com/pdf/WEET_SMB_RS2A_THRU_RS2M.pdf

HER307

DO-27 HER301 THRU HER308 (HER301, HER302, HER303, HER304, HER305, HER306, HER307, HER308) High Efficient Rectifier

https://weetcl.com/pdf/WEET_DO27_HER301_THRU_HER308.pdf

FR207

DO-15 FR201 THRU FR207 (FR201, FR202, FR203, FR204, FR205, FR206, FR207）Fast Recovery Rectifier

https://weetcl.com/pdf/WEET_DO15_FR201_THRU_FR207.pdf

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Huge order demands of below parts come from various customers, the production line is extremely busy. 

MB10S

1.5KE18CA

1.5KE440CA

1N4002

1N4007

1N4742A

1N4746A

1N4748A

1N5408

1N5819

1SMA4744

2N7002K

6A10

BAT54C

BZT52C12

BZV55B15

BZV55B30

BZV55B3V6

BZV55B5V6

BZV55C12V

BZV55C15V

BZV55C18V

BZV55C24

BZV55C2V7

BZV55C3V9

BZV55C4V3

BZV55C5V1

BZV55C5V6

BZV55C6V8

DB104

DL4740A

ES1D

GBJ2506

GBU8M

GS1M

KBP210

KBPC2510

KBU1010

KBU410

KBU810

LL4148

M7

MB6S

MB8S

MF10F

MUR160

MUR360

P6SMB33CA

S1M

S2MA

S3M

SF34G

SMBJ36A

SMBJ6.0A

SS32

SW4350

SW5350

UF4007

US1J

US1M

ZM4749A

ZMM5239B

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Marking and Identification of SMD/chip diodes

1. SMD diode model marking and polarity identification

The model of SMD diode is marked with letters, numerical codes or letter + numerical code marking method and color (code) marking method.

For example, the electrical parameters of the printed word "A3" are as follows: PD=0.15W; IF=0.1A; VB=80V; Trr=4ns. In the color labeling method, the model is mainly found by the color marked on the negative side, and then the parameter value is found by the model.

SMD diode polarity identification method: glass tubular SMD diode, the red end is the positive electrode, the black end is the negative electrode; the rectangular SMD diode, the one end with the white horizontal line is the negative electrode.

2. SMD diode quality measurement

A normal SMD diode, measured on the circuit, has a small forward resistance and a large reverse resistance, and there is a significant difference in resistance between the two. Disconnect the circuit, if measured with a pointer multimeter, the forward resistance is about 3kΩ, and the reverse resistance is hundreds of kiloohms or infinity; The voltage drop is infinite.

3. SMD diode identification on board

On the circuit board, the component number of SMD diode generally starts with the letter D, such as D1, D2, etc., or VD, such as VD1, VD2, etc.; or DD, such as DD1, DD2, etc.

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China Middle Autumn Day: Holiday from 10th to 12th,Sept. Resume work on 13th,Sept

China National Day: Holiday from 1st to 7th,Oct. Resume work on 8th Oct.

Please send your inquires as usual, we will reply you as our earliest, thank you.

Welcome you enjoy holiday together with WEET team.

WEET Popular DIP Diodes And Rectifiers List https://weetcl.com/WEET_Popular_DIP_Diodes_and_Rectifiers_List/

WEET Strong SMD Diodes And Rectifiers List https://weetcl.com/WEET_Strong_SMD_Diodes_and_Rectifiers_List/

WEET Audio Capacitors Factory: https://www.musicaps.com/Factory-View.html

WEET Audio Capacitors Stock: https://www.musicaps.com/Factory-Stock.html

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WEET Surface Mount SMD Diode Rectifiers Bridge Rectifiers Production Line Wholesale Price Market Quotation Factory Supply

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