KBU4B-E4/51

_**End of Life - Last Available Purchase Date: 30-July-2025**_ 

## **KBU4A, KBU4B, KBU4D, KBU4G, KBU4J, KBU4K, KBU4M** 

www.vishay.com 

## Vishay General Semiconductor 

## **Single-Phase Bridge Rectifier** 

## **FEATURES** 

- UL recognition, file number E54214 

- Ideal for printed circuit boards 

- High surge current capability 

**==> picture [16 x 11] intentionally omitted <==**

**----- Start of picture text -----**<br>
e4<br>**----- End of picture text -----**<br>


- Plastic-passivated junction 

**==> picture [140 x 23] intentionally omitted <==**

**----- Start of picture text -----**<br>
~ ~<br>\\ ~  \ ~  . — Case Style KBU<br>**----- End of picture text -----**<br>


- High case dielectric strength of 1500 VRMS 

- Solder dip 275 °C max. 10 s, per JESD 22-B106 

- Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 

## **LINKS TO ADDITIONAL RESOURCES** 

3D Models 

## **TYPICAL APPLICATIONS** 

General purpose use in AC/DC bridge full wave rectification for monitor, TV, printer, SMPS, adapter, audio equipment, and home appliances applications. 

|**PRIMARY CHARACTERISTICS**|**PRIMARY CHARACTERISTICS**|
|---|---|
|Package|KBU|
|IF(AV)|4 A|
|VRRM|50 V, 100 V, 200 V, 400 V, 600 V,<br>800 V, 1000 V|
|IFSM|200 A|
|IR|5 μA|
|VFat IF= 4 A|1.0 V|
|TJmax.|150 °C|
|Circuit configuration|In-line|



## **MECHANICAL DATA** 

## **Case:** KBU 

Molding compound meets UL 94 V-0 flammability rating Base P/N-E4 - RoHS-compliant, commercial grade 

**Terminals:** silver plated leads, solderable per J-STD-002 and JESD22-B102 

**Polarity:** as marked on body 

**Mounting Torque:** 10 cm-kg (8.8 inches-lbs) max. 

**Recommended Torque:** 5.7 cm-kg (5 inches-lbs) 

~~a~~ **MAXIMUM RATINGS** (TA = 25 °C unless otherwise noted) **PARAMETER SYMBOL KBU4A KBU4B KBU4D KBU4G KBU4J KBU4K KBU4M UNIT** ~~a GO~~ Maximum repetitive peak reverse voltage VRRM 50 100 200 ~~OO~~ 400 600 800 1000 V ~~GO~~ Maximum RMS voltage VRMS 35 70 140 280 420 560 700 V Maximum DC blocking voltage VDC 50 100 200 400 600 800 1000 V ~~Joo~~ Maximum average forward  rectified output current at TTCA = 30 °C  = 100 °C[(2)][(1)] IF(AV) ~~OO~~ 4.04.0 A ~~es~~ Peak forward surge current single sine-wavesuperimposed on rated load IFSM 200 A Operating junction and storage temperature range TJ, TSTG -50 to +150 °C ~~a~~ **Notes** 

> (1) Units mounted on a 2.0" x 1.6" x 0.3" thick (5 cm x 4 cm x 0.8 cm) aluminum plate 

> (2) Units mounted on PCB with 0.5" x 0.5" (12 mm x 12 mm) copper pads and 0.375" (9.5 mm) lead length 

|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS** (TA= 25 °C unless otherwise noted)|
|---|---|---|---|---|---|---|---|---|---|---|
|**PARAMETER**|**TEST CONDITIONS**|**SYMBOL KBU4A**|**SYMBOL KBU4A**|**KBU4B**|**KBU4D**|**KBU4G**|**KBU4J**|**KBU4K**|**KBU4M**|**UNIT**|
|Maximum instantaneous<br>forward drop per diode|IF= 4.0 A|VF|1.0|||||||V|
|Maximum DC reverse<br>current at rated DC blocking<br>voltage per diode|TA= 25 °C|IR|5.0|||||||μA|
||TA= 125 °C||1.0|||||||mA|



Revision: 12-Mar-2025 

Document Number: 88656 

**1** 

For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

_**End of Life - Last Available Purchase Date: 30-July-2025**_ 

## **KBU4A, KBU4B, KBU4D, KBU4G, KBU4J, KBU4K, KBU4M** 

www.vishay.com 

Vishay General Semiconductor 

|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TA= 25 °C unless otherwise noted)|
|---|---|---|---|---|---|---|---|---|---|
|**PARAMETER**|**SYMBOL**|**KBU4A**|**KBU4B**|**KBU4D**|**KBU4G**|**KBU4J**|**KBU4K**|**KBU4M**|**UNIT**|
|Typical thermal resistance|RθJA|19(2)|||||||°C/W|
||RθJL|4.0(1)||||||||



## **Notes** 

> (1) Units mounted on a 2.0" x 1.6" x 0.3" thick (5 cm x 4 cm x 0.8 cm) aluminum plate 

- (2) Units mounted on PCB with 0.5" x 0.5" (12 mm x 12 mm) copper pads and 0.375" (9.5 mm) lead length 

## **ORDERING INFORMATION** (Example) 

|**ORDERING INFORMATION**(Example)|**ORDERING INFORMATION**(Example)|**ORDERING INFORMATION**(Example)|**ORDERING INFORMATION**(Example)|**ORDERING INFORMATION**(Example)|
|---|---|---|---|---|
|**PREFERRED P/N**|**UNIT WEIGHT (g)**|**PREFERRED PACKAGE CODE**|**BASE QUANTITY**|**DELIVERY MODE**|
|KBU4J-E4/51|8.0|51|250|Anti-static PVC tray|



## **RATINGS AND CHARACTERISTICS CURVES** (TA = 25 °C unless otherwise noted) 

**==> picture [195 x 352] intentionally omitted <==**

**----- Start of picture text -----**<br>
60 Hz<br>Resistive or<br>Inductive Load<br>Heatsink Mounting,<br>T C , 2.0 x 1.6 x 3.0"<br>(5.0 x 4.0 x 0.8 cm)<br>Al. Plate<br>TA, PCB Mounting<br>0.47" x 0.47" (12 x 12 mm)<br>Copper Pads<br>Temperature (°C)<br>Fig. 1 - Derating Curve Output Rectified Current<br>TJ = 150 °C<br>Single Sine-Wave<br>Number of Cycles at 60 Hz<br>4<br>3<br>2<br>1<br>0<br>0 50 100 150<br>200<br>175<br>150<br>125<br>100<br>75<br>50<br>25<br>1 10 100<br>Peak Forward Surge Current (A)<br>Average Forward Current (A)<br>**----- End of picture text -----**<br>


Fig. 2 - Maximum Non-Repetitive Peak Forward Surge Current Per Diode 

**==> picture [194 x 352] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>10<br>T J  = 25 °C<br>Pulse Width = 300 µs<br>1 % Duty Cycle<br>1<br>0.1<br>0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3<br>Instantaneous Forward Voltage (V)<br>Fig. 3 - Typical Forward Characteristics Per DiodeTypical Forward Characteristics Per Diode<br>50<br>10<br>TJ = 100 °C<br>1<br>0.1<br>TJ = 25 °C<br>0.01<br>0 20 40 60 80 100<br>Percent of Rated Peak Reverse Voltage (%)<br>Instantaneous Reverse Current (µA)<br>Instantaneous Forward Current (A)<br>**----- End of picture text -----**<br>


Fig. 3 - Typical Forward Characteristics Per DiodeTypical Forward Characteristics Per Diode 

Fig. 4 - Typical Reverse Leakage Characteristics Per Diode 

Revision: 12-Mar-2025 

Document Number: 88656 

**2** 

For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

_**End of Life - Last Available Purchase Date: 30-July-2025**_ 

## **KBU4A, KBU4B, KBU4D, KBU4G, KBU4J, KBU4K, KBU4M** 

www.vishay.com 

## Vishay General Semiconductor 

**==> picture [195 x 156] intentionally omitted <==**

**----- Start of picture text -----**<br>
TJ = 25 °C<br>f = 1.0 MHz<br>V sig  = 50 mV p-p<br>Reverse Voltage (V)<br>150<br>100<br>75<br>50<br>25<br>0<br>0.1 1 10 100<br>Junction Capacitance (pF)<br>**----- End of picture text -----**<br>


Fig. 5 - Typical Junction Capacitance Per Diode 

## **PACKAGE OUTLINE DIMENSIONS** in inches (millimeters) 

## **Case Style KBU** 

**==> picture [240 x 253] intentionally omitted <==**

**----- Start of picture text -----**<br>
0.935 (23.7)<br>0.160 (4.1) 0.895 (22.7) 0.185 (4.7)<br>0.140 (3.6)<br>0.165 (4.2)<br>45°<br>0.700 0.085 (2.2)<br>0.760 (17.8) 0.065 (1.7)<br>(19.3) 0.660<br>MAX. (16.8)<br>0.075 (1.9) R TYP. (2 Places) 0.455 (11.3)<br>0.405 (10.3)<br>1.0<br>(25.4)<br>MIN.<br>0.052 (1.3)<br>0.048 (1.2)<br>DIA.<br>0.220 (5.6)<br>0.180 (4.6)<br>0.240 (6.09)<br>0.200 (5.08)<br>0.205 (5.2) 0.280 (7.1)<br>0.260 (6.6)<br>0.185 (4.7)<br>**----- End of picture text -----**<br>


Revision: 12-Mar-2025 

Document Number: 88656 

**3** 

For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**Legal Disclaimer Notice** Vishay 

www.vishay.com 

## **Disclaimer** 

ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. 

Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. 

Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. 

Statements regarding the suitability of products for certain types of applications are based on Vishay's knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer's responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer's technical experts. Product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein. 

Hyperlinks included in this datasheet may direct users to third-party websites. These links are provided as a convenience and for informational purposes only. Inclusion of these hyperlinks does not constitute an endorsement or an approval by Vishay of any of the products, services or opinions of the corporation, organization or individual associated with the third-party website. Vishay disclaims any and all liability and bears no responsibility for the accuracy, legality or content of the third-party website or for that of subsequent links. 

Vishay products are not designed for use in life-saving or life-sustaining applications or any application in which the failure of the Vishay product could result in personal injury or death unless specifically qualified in writing by Vishay. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. 

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. 

Document Number: 91000 

_**© 2025 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED**_ 

Revision: 01-Jan-2025 

**1** 

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000