LQA20B300C

Fast / Ultrafast Diode, Qspeed, 300 V, 20 A, Common Cathode, 1.9 V, 12.6 ns, 80 A

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Manufacturer: POWER INTEGRATIONS
Product type: Fast & Ultrafast Recovery Rectifier Diodes
Repetitive Reverse Voltage Vrrm Max:300V; Forward Current If(AV):20A; Diode Configuration:Common Cathode; Forward Voltage VF Max:1.9V; Reverse Recovery Time trr Max:12.6ns; Forward Surge C
SVHC: No SVHC (21-Jan-2025)
No. of Pins: 3 Pin
Product Range: Qspeed Q Series
Qualification: -
Diode Case Style: TO-263AB
Diode Configuration: Common Cathode
Forward Voltage Max: 1.9V
Forward Surge Current: 80A
Reverse Recovery Time: 12.6ns
Average Forward Current: 20A
Operating Temperature Max: 150°C
Repetitive Peak Reverse Voltage: 300V

Delivery and price
Units per pack	1000
Price	0.888 €
Current stock	10+
Lead time	30 days

Datasheet

## **LQA20T300C, LQA20B300C Qspeed[™]** Family 

## **300 V, 20 A Q-Series Common-Cathode Diode** 

## **Product Summary** 

|IF(AVG) per diode|10|A|
|---|---|---|
|VRRM|300|V|
|QRR(Typat 125 °C)|38|nC|
|IRRM (Typat 125 °C)|2.3|A|
|Softness tb/ta(Typat 125 °C)|0.7||



## **General Description** 

This device has the lowest QRR of any 300 V Silicon diode. Its recovery characteristics increase efficiency, reduce EMI and eliminate snubbers. 

## **Applications** 

- AC/DC and DC/DC output rectification 

## **Pin Assignment** 

- Output & freewheeling diodes 

- Motor drive circuits 

- DC-AC inverters 

## **Features** 

- Low QRR, low IRRM, low tRR 

- High dIF/dt capable (1000A/s) 

## **TO-220AB             TO-263AB** 

**LQA20T300C LQA20B300C A1 K A2** 

## RoHS Compliant 

Package uses Lead-free plating and Green mold compound, Halogen free per IEC 61249-2-21. 

- Soft recovery 

## **Benefits** 

- Increases efficiency 

- Eliminates need for snubber circuits 

- Reduces EMI filter component size & count 

- Enables extremely fast switching 

## **Absolute Maximum Ratings** 

Absolute maximum ratings are the values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. 

|**Symbol**<br>~~a~~|**Parameter**<br>~~ee~~|**Conditions**<br>~~ee~~|**Rating**<br>~~ee~~|**Units**|
|---|---|---|---|---|
|VRRM<br>~~a~~<br>~~es~~|Peak repetitive reverse voltage<br>~~ee~~<br>~~es~~|~~ee~~|300<br>~~ee~~|V|
|IF(AVG)<br>~~es~~<br>~~es~~|Average forward current<br>~~es~~<br>~~es~~|Per Diode,TJ= 150 °C,TC= 115 °C|10|A|
|~~es~~<br>~~aes~~|~~es~~<br>~~es~~|Per Device,TJ= 150 °C,TC= 115 °C|20|A|
|IFSM<br>~~es~~|Non-repetitivepeak surge current<br>~~es~~|60 Hz,½ cycle|80|A|
|IFSM<br>~~es~~<br>~~a~~|Non-repetitivepeak surge current<br>~~es~~<br>~~QO~~|½ cycle of t = 28s Sinusoid,TC= 25 °C<br>~~QO~~|350<br>~~QO~~|A<br>~~QO~~|
|TJ<br>~~ee~~|Maximumjunction temperature<br>~~ee~~|~~Ge~~|150<br>~~Ge~~|°C|
|TSTG<br>~~ee~~<br>~~ee~~|Storage temperature<br>~~ee~~<br>~~ee~~|~~Ge~~|–55 to 150<br>~~Ge~~|°C|
|~~ee~~|Lead solderingtemperature<br>~~ee~~|Leads at 1.6 mm from case,10 sec|300|°C|
|PD<br>~~ee~~<br>~~I~~|Power dissipation<br>~~ee~~|TC= 25 °C|52|W|



November 2015 

www.power.com 

Pe **LQA20T300C, LQA20B300C** 

## **Thermal Resistance** 

|**Symbol**|**Resistance from:**|**Conditions**|**Rating**|**Units**|
|---|---|---|---|---|
|RJA|Junction to ambient|TO-220AB(only)|62|°C/W|
|RJC|Junction to case|Per Diode|2.4|°C/W|
|||Per Device|1.2|°C/W|



## **Electrical Specifications at TJ = 25**  **C (unless otherwise specified)** 

|**Symbol**<br>**Parameter**<br>**Conditions**<br>**Min**<br>**Typ**<br>**Max**<br>**Units**|
|---|
|**DC Characteristics per diode**|
|IR<br>Reverse current per diode<br>VR= 300 V, TJ= 25 °C<br>-<br>-<br>25<br>A<br>VR= 300 V, TJ= 125 °C<br>-<br>0.32<br>-<br>mA|
|VF<br>Forward voltage per diode<br>IF= 10 A,TJ= 25 °C<br>-<br>1.58<br>1.9<br>V<br>IF= 10 A,TJ= 150 °C<br>-<br>1.36<br>-<br>V<br>CJ<br>Junction capacitance per<br>diode<br>VR= 10 V, 1 MHz<br>-<br>33<br>-<br>pF<br>**Dynamic Characteristics per diode**<br>~~ee~~<br>~~_——eEeEEeEeEe~~<br>~~es a~~<br>~~ee ee ee ee~~|
|tRR<br>Reverse recovery time, per<br>diode<br>dIF/dt =200 A/s<br>VR= 200, IF= 10 A<br>TJ= 25 °C<br>-<br>12.6<br>-<br>ns<br>TJ= 125 °C<br>-<br>24<br>-<br>ns<br>QRR<br>Reverse recovery charge,<br>per diode<br>dIF/dt = 200 A/s<br>VR= 200, IF= 10 A<br>TJ= 25 °C<br>-<br>10.2<br>16<br>nC<br>TJ= 125 °C<br>-<br>38<br>-<br>nC<br>IRRM<br>Maximum reverse recovery<br>current, per diode<br>dIF/dt = 200 A/s<br>VR= 200, IF= 10 A<br>TJ= 25 °C<br>-<br>1.3<br>1.7<br>A<br>TJ= 125 °C<br>-<br>2.3<br>-<br>A<br>S<br>Softness per diode =<br>A<br>B<br>t<br>t<br>dIF/dt = 200 A/s<br>VR= 200, IF= 10 A<br>TJ= 25 °C<br>-<br>0.7<br>-<br>TJ= 125 °C<br>-<br>0.7<br>-<br>~~a~~<br>~~es~~<br>~~ee ee ee ee~~<br>~~ES~~<br>~~es~~<br>~~ee ee ee ee~~<br>~~a~~<br>~~es~~<br>~~ee ee ee ee~~<br>~~a~~<br>~~ee ee~~|
|**Note to component engineers**:Q-Series diodes employ Schottky technologies in their design and|
|construction.  Therefore, component engineers should plan their test setups to be similar to traditional|
|Schottky test setups.  (For further details, see application note AN-300.)|
|VR|
||<br>Ll<br>put|
|1i5V|
|IF<br>dIF/dt<br>tRR<br>tb<br>ta<br>0<br><—<br>Pulse Generator<br>Rg<br>Qt<br>~~ad~~<br>IUL<br>||
|0.1xIRRM|
|IRRM<br>PI-7614-041315|



**Figure 1.  Reverse Recovery Definitions.** 

**Figure 2.  Reverse Recovery Test Circuit.** 

**2** ~~|~~ 

Rev 1.6 11/15 

po **LQA20T300C, LQA20B300C** 

## **Electrical Specifications at TJ = 25**  **C (unless otherwise specified)** 

**==> picture [456 x 430] intentionally omitted <==**

**----- Start of picture text -----**<br>
20 1.0<br>18 TT EELEILLELLL LLL 0.9 ese/a<br>16 0.8 Tj=125C<br>14 POCEECEELLEEESE Tj=125C  EL 0.7 Aee yy<br>12 POCEECeeet AZ 0.6 ee<br>10 COCCEEEEEEEE EIA ALLE 0.5 a<br>8 FCCC Tj=25C 0.4 7<br>6 POPC 0.3 a A2 Tj=25C<br>4 COCCECC EA 0.2 a<br>2 COCO eee 0.1 i<br>0 Sanne? >—- cane 0.0 aa> ae<br>0.0 0.5 1.0 1.5 2.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0<br>VF (V) VF (V)<br>Figure 3.  Typical IF vs. VF Figure 4.  Typical IF vs. VF.<br>120 30<br>10080 P|| | | | ft ft 2520 eeee ee<br>60 | | | ft ft | ft ft 15 SS eee<br>40 A | | | ft | ft ft 10 po<br>| | | | ft ft] — | | oA<br>20 NE | | | | | | 5 ee ee ee eee<br>0 eee 0 a ee eee<br>0 20 40 60 80 100 120 140 160 180 25 50 75 100 125 150<br>VR (V) Case Temperature, TC ( [o] C)<br>Figure 5.  Typical Cj vs. VR.  Figure 6.  DC Current Derating Curve.<br>80 30<br>70 ee 25 rT dIF/dt=200A/us |<br>60<br>50 a dI F /dt=500A/us 20 fF fo<br>40 er Td 15 ee ee eeeee<br>30 dIF/dt=500A/us<br>a 10 FF]<br>20 dIF/dt=200A/us<br>10 SE 5 eeft [|<br>0 es 0 P| [| ee| ft ft<br>0 2 4 6 8 10 12 14 0 2 4 6 8 10 12 14<br>IF (A) IF (A)<br>(A) (A)<br>IF  IF<br>(pF)j   (A)<br>C IF(AV)<br> (nC)  (ns)<br>QRR tRR<br>**----- End of picture text -----**<br>


**Figure 7.  Typical QRR vs. IF at Tj = 125 °C.** 

**Figure 8.  Typical tRR vs. IF at Tj = 125 °C.** 

**3** 

Rev 1.6 11/15 

**LQA20T300C, LQA20B300C** 

**==> picture [456 x 131] intentionally omitted <==**

**----- Start of picture text -----**<br>
60 50 duty cycle=10%<br>45 duty cycle=30%<br>50 duty cycle=50%<br>40 DC<br>40 35 PWN<br>30<br>30 25 eeae a ae<br>20 20<br>15<br>10 10 rr a ee Sa<br>0 5 a ee<br>25 50 75 100 125 150 0 Ee NY<br>o 25 50 75 100 125 150<br>Case Temperature, TC ( C) T C(°C)<br>P (W) (PEAK) (A)<br>IF<br>**----- End of picture text -----**<br>


**Figure 9.  Power Derating Curve.** 

**Figure 10.  IF (Peak) vs. TC, f = 70 kHz.** 

## LQA20x300C 

**==> picture [442 x 275] intentionally omitted <==**

**----- Start of picture text -----**<br>
1<br>JaE<br>a a<br>D= 0.5<br>Ee SE a tt EH<br>pea D = 0.3  a a a 6<br>PLE | TT Cer4 TET<br>D= 0.1<br>0.1 I AAI<br>ee 0 ee LAI<br>a tO OO OO OG OO<br>be D= 0.05 | A a HH AH<br>ere[ttooeeee<br>AAA VS<br>D= 0.02<br>Gn<br>O D= 0.01 A<br>0.01 D=0.005 TYA TIN LTTEET<br>AA D=0.002 ATTtee + His<br>LA aii Ss Pom | |<br>r7)Zit Single Pulse sn  ETTiti fTPThE PY ee citl | ik |<br>PLET) SSSotes: toro ety rt i<br>0.001 PEEVE EEE LEER aLeet 72 rol<br>1.E-06 1.E-05 1.E-04 1.E-03 1.E-02 1.E-01 1.E+00<br>t1(sec)<br>Zth(j-c)/Rth(j-c)<br>**----- End of picture text -----**<br>


**Figure 11.  Normalized Maximum Transient Thermal Impedance.** 

**4** ~~a~~ Rev 1.6 11/15 

es **LQA20T300C, LQA20B300C** 

## **Dimensional Outline Drawings** 

|**TO-220AB**|**øP**<br>**E**<br>**Q**<br>**D**<br>**D1**<br>**e** **e1**<br>**L1**<br>**b**<br>**b2**<br>J —____4<br>~~—~~<br>|<br>=><br>-<br>~~4~~<br>||**L**|**c**|**A**<br>**A1**<br>**A2**<br>The|**Millimeters**<br>**Dim**<br>**MIN**<br>**MAX**<br>**A**<br>4.32<br>4.70<br>**A1**<br>1.11<br>1.38<br>**A2**<br>2.59<br>2.79<br>**b**<br>0.77<br>1.00<br>**b2**<br>1.23<br>1.36<br>**C**<br>0.34<br>0.47<br>**D**<br>14.71<br>15.75<br>**D1**<br>9.05<br>9.25<br>**E**<br>9.96<br>10.36<br>**e**<br>2.44<br>2.64<br>**e1**<br>4.98<br>5.18<br>**L**<br>12.70<br>14.22<br>**L1**<br>–<br>3.90<br>**P**<br>3.71<br>3.96<br>**Q**<br>2.54<br>2.90<br>~~a eee~~<br>~~es~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~**ee**~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~es~~<br>~~ee~~|
|---|---|---|---|---|---|



**5** 

Rev 1.6 11/15 

**LQA20T300C, LQA20B300C** 

## **TO-263AB** 

||**Millimeters**|**Millimeters**|
|---|---|---|
|**Dim**|**MIN**<br>~~es~~|**MAX**|
|**A**<br>~~es~~|4.40<br>~~es~~<br>~~es~~|4.70<br>~~es~~|
|**A1**<br>~~es~~|0.00<br>~~es~~<br>~~es~~<br>~~es~~|0.25<br>~~es~~|
|**A2**<br>~~es~~|2.59<br>~~es~~<br>~~es~~|2.79<br>~~es~~|
|**b**<br>~~es~~<br>~~ee~~|0.77<br>~~es~~<br>~~es~~<br>~~ee~~<br>~~ee~~|0.90<br>~~es~~<br>~~ee~~|
|**b2**<br>~~ee~~|1.23<br>~~ee~~<br>~~ee~~|1.36<br>~~ee~~|
|**c2**<br>~~ee~~|1.22<br>~~ee~~<br>~~ee~~|1.32<br>~~ee~~|
|**D**|9.05|9.25|
|**E**|10.06|10.26|
|**e**|2.54 BSC|2.54 BSC|
|**H**|14.70<br>~~ee~~|15.50|
|**L**<br>~~es~~<br>~~ee~~|2.00<br>~~es~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.60<br>~~es~~<br>~~ee~~|
|**L1**<br>~~ee~~<br>~~es~~|1.17<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~es~~<br>~~ee~~|1.40<br>~~ee~~<br>~~es~~|
|**L2**<br>~~ee~~<br>~~es~~|–<br>~~ee~~<br>~~ee~~<br>~~es~~<br>~~ee~~|1.75<br>~~ee~~<br>~~es~~|
|**L3**<br>~~es~~|0.25 BSC<br>~~es~~<br>~~ee~~|0.25 BSC<br>~~es~~|
|**L4**|2.00 BSC|2.00 BSC|
|**Θ**|0°|8°|
|**Θ1**|5°|9°|
|**Θ2**|1°|5°|



|**Mechanical Mounting Method**|**Maximum Torque / Pressure specification **|
|---|---|
|Screw through hole inpackage tab|1 Newton Meter(nm)or 8.8 inch-pounds(lb-in)|
|Clampagainstpackage body|12.3 kilogram-forceper square centimeter(kgf/cm2)or 175 lbf/in2|



**6** || 

Rev 1.6 11/15 

ee **LQA20T300C, LQA20B300C** 

## **Footprint and Solder Pad Dimensions** 

**Pad Dimensions in mm: TO-263AB** 

**Soldering time and temperature:** This product has been designed for use with hightemperature, lead-free solder.  The component leads can be subjected to a maximum temperature of 300 °C, for up to 10 seconds.  See Application Note AN-303, for more details. 

## **Ordering Information** 

|**Part Number**|**Package**|**Packing**|
|---|---|---|
|LQA20T300C|TO-220AB|50 units/tube|
|LQA20B300C|TO-263AB|800 units/reel|



The information contained in this document is subject to change without notice **.** 

**7** || 

Rev 1.6 11/15 

**LQA20T300C, LQA20B300C** 

|**Revision**|**Notes**|**Date**|
|---|---|---|
|1.4|Released by Qspeed|06/10|
|1.5|Converted to Power Integrations Document|01/11|
|1.6|Updated with new Brand Style. Added footprint and solder pad dimension<br>for TO-263ABpackage.|11/15|



**8** | 

Rev 1.6 11/15 

**LQA20T300C, LQA20B300C** 

## **For the latest updates, visit our website: www.power.com** 

Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability.  Power Integrations does not assume any liability arising from the use of any device or circuit described herein.  POWER INTEGRATIONS MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. 

## **Patent Information** 

The products and applications illustrated herein (including transformer construction and circuits’ external to the products) may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations.  A complete list of Power Integrations’ patents may be found at www.power.com. Power Integrations grants its customers a license under certain patent rights as set forth at http://www.power.com/ip.htm. 

## **Life Support Policy** 

POWER INTEGRATIONS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF POWER INTEGRATIONS.  As used herein: 

1. A Life support device or system is one which, (i) is intended for surgical implant into the body, or (ii) supports or sustains life, and (iii) whose failure to perform, when properly used in accordance with instructions for use, can be reasonably expected to result in significant injury or death to the user. 

2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 

The PI Logo, TOPSwitch, TinySwitch, LinkSwitch, LYTSwitch, InnoSwitch, DPA-Switch, PeakSwitch, CAPZero, SENZero, LinkZero, HiperPFS, HiperTFS, HiperLCS, Qspeed, EcoSmart, Clampless, E-Shield, Filterfuse, FluxLink, StackFET, PI Expert and PI FACTS are trademarks of Power Integrations, Inc. Other trademarks are property of their respective companies.  ©Copyright 2015 Power Integrations, Inc. 

## **Power Integrations Worldwide Sales Support Locations** 

## **WORLD HEADQUARTERS** 

5245 Hellyer Avenue San Jose, CA 95138, USA. Main: +1-408-414-9200 Customer Service: Phone: +1-408-414-9665 Fax: +1-408-414-9765 e-mail: usasales@power.com 

## **GERMANY** 

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## **JAPAN** 

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## **TAIWAN** 

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## **INDIA** 

#1, 14[th] Main Road Vasanthanagar Bangalore-560052 India Phone: +91-80-4113-8020 Fax: +91-80-4113-8023 e-mail: indiasales@power.com 

## **KOREA** 

## **UK** 

RM 602, 6FL Cambridge Semiconductor, Korea City Air Terminal B/D, a Power Integrations company 159-6 Westbrook Centre, Block 5, Samsung-Dong, Kangnam-Gu, 2nd Floor Seoul, 135-728 Korea Milton Road Phone: +82-2-2016-6610 Cambridge CB4 1YG Fax: +82-2-2016-6630 Phone: +44 (0) 1223-446483 e-mail: koreasales@power.com e-mail: eurosales@power.com 

## **CHINA (SHENZHEN)** 

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## **ITALY** 

Via Milanese 20, 3[rd] . Fl. 20099 Sesto San Giovanni (MI) Italy Phone: +39-024-550-8701 Fax:  +39-028-928-6009 e-mail: eurosales@power.com 

## **SINGAPORE** 

51 Newton Road, #19-01/05 Goldhill Plaza Singapore, 308900 Phone: +65-6358-2160 Fax: +65-6358-2015 e-mail: singaporesales@power.com 

**9** ~~7~~ 

Rev 1.6 11/15

Updated at June 4, 2026

Power Integrations is a leading innovator in semiconductor technologies dedicated to high-voltage power conversion. Renowned for advancing the clean-power ecosystem, the company designs highly integrated chips that maximize energy efficiency across a vast range of consumer and industrial applications. Through proprietary advancements like PowiGaN gallium-nitride technology and EcoSmart energy-efficiency solutions, their components deliver exceptional performance while significantly reducing global energy waste. A major focus of their product lineup includes discrete semiconductors, particularly fast and ultrafast recovery rectifier diodes. These essential components provide the high-speed switching and exceptional reliability required for modern power supply designs. By minimizing power loss and thermal output, they ensure efficient power transmission in demanding, high-efficiency circuit environments. Furthermore, Power Integrations is a premier manufacturer of specialized LED lighting components. Their advanced AC/DC LED driver ICs offer engineers streamlined, energy-efficient solutions for solid-state lighting applications. By integrating critical control and protection features into a single footprint, these drivers reduce the overall component count and accelerate the development of reliable, high-performance commercial and consumer lighting systems.

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