1N4937-T

**NOT RECOMMENDED FOR NEW DESIGN USE RS1A - RS1J Series Pb 1N4933 - 1N4937** 

## **1.0A FAST RECOVERY RECTIFIER** 

## **Features** 

- Diffused Junction 

- Fast Switching for High Efficiency 

- High Current Capability and Low Forward Voltage Drop 

- Surge Overload Rating to 30A Peak 

- Low Reverse Leakage Current 

- **Lead Free Finish, RoHS Compliant (Notes 1 & 2)** 

## **Mechanical Data** 

- Case: DO-41 

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DO-41 Plastic<br>Dim<br>Min  Max<br>A  25.40  <br>B  4.06  5.21<br>C  0.71  0.864<br>D  2.00  2.72<br>All Dimensions in mm<br>(Note 3)<br>Device Packaging Shipping<br>1N4933-T  DO-41  5K/Tape & Reel, 13-inch<br>1N4934-T  DO-41  5K/Tape & Reel, 13-inch<br>1N4935-T  DO-41  5K/Tape & Reel, 13-inch<br>1N4936-T  DO-41  5K/Tape & Reel, 13-inch<br>1N4937-T  DO-41  5K/Tape & Reel, 13-inch<br>**----- End of picture text -----**<br>


- Case Material: Molded Plastic.  UL Flammability Classification Rating 94V-0 

- Moisture Sensitivity:  Level 1 per J-STD-020 

- Terminals: Finish - Bright Tin.  Plated Leads Solderable per MILSTD-202, Method 208 

- Polarity: Cathode Band 

- Mounting Position: Any 

- Marking: Type Number 

- 0.35 grams (Approximate) 

## **Ordering Information** (Note 3) 

- Notes: 1. EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. All applicable RoHS exemptions applied. 

   2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 

   3. For packaging details, go to our website at https://www.diodes.com/design/support/packaging/diodes-packaging/. 

## **Maximum Ratings and Electrical Characteristics** (@TA = +25°C, unless otherwise specified.) 

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Single phase, half wave, 60Hz, resistive or inductive load.<br>For capacitive load, derate current by 20%.<br>Pla Characteristic  Symbol  1N4933  1N4934  1N4935  1N4936  1N4937  Unit<br>Peak Repetitive Reverse Voltage  VRRM<br>Working Peak Reverse Voltage  VRWM 50  100  200  400  600  V<br>DC Blocking Voltage (Note 7) VR<br>— et<br>RMS Reverse Voltage  VR(RMS) 35  70  140  280  420  V<br>ey A CAN | | | ttt.<br>Average Rectified Output Current (Note 4) @ TA = +75C  IO 1.0  A<br>ee  An> ey creea. SS ss(O(n(<br>Non-Repetitive Peak Forward Surge Current 8.3ms  Single Half Sine-Wave Superimposed on Rated Load IFSM 30  A<br>NS TOE oo<br>Forward Voltage Drop @ IF = 1.0A  VFM 1.2  V<br>Sn Peak Reverse Current @TA = +25C  ee 5.0<br>i, at Rated DC Blocking Voltage (Note 7) @ Ss  TA = +100C es IRM 100  A<br>I Reverse Recovery Time (Note 6)  I tRR 200  ns<br>I Typical Total Capacitance (Note 5)  CT 15  pF<br>Typical Thermal Resistance Junction to Ambient  RJA 100  °C/W<br>a I I<br>rn Operating and Storage Temperature Range  TJ, TSTG -65 to +150  C<br>**----- End of picture text -----**<br>


Notes: 4.   Leads maintained at ambient temperature at a distance of 9.5mm from the case. 

5.   Measured at 1.0MHz and applied reverse voltage of 4.0V DC. 

6.   Measured with IF = 0.5A, IR = 1A, Irr = 0.25A. 

7.   Short duration pulse test used to minimize self-heating effect. 

1 of 3 **www.diodes.com** 

1N4933 - 1N4937 Document number: DS26002  Rev. 8 - 3 

November 2018 © Diodes Incorporated 

**NOT RECOMMENDED FOR NEW DESIGN** 

**USE RS1A - RS1J Series** 

**1N4933 - 1N4937** 

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20<br>1.0 [A)]<br>T [(] 10<br>TE [N] E |_| |_|<br>R<br>0.8 R<br>U<br>C<br>+A D Se<br>[R] A 1.0<br>0.6 ee W |<br>[R] O<br>F<br>S<br>NL oe<br>0.4<br>[OU] E<br>0.1<br>T [AN]<br>TE —A | aa |<br>0.2<br>[TAN] S<br>Se a T = 25°C S— j<br>PC Board Mounted Pulse Width = 300µs<br>9.5mm Lead Lengths [,IN] I F 0.01<br>0<br>0.6 0.8 1.0 1.2 1.4 1.6<br>0 25 50 75 100 125 150 175<br>eee TA, AMBIENT TEMPERATURE ((°C 篊 ) V  , INSTANTANEOUS FORWARD VOLTAGE (V) ae F Fig. 2  Typical Forward Characteristics ane<br>Fig. 1  Forward Current Derating Curve<br>30 100<br>25°C<br>Pulse Width<br>8.3ms Single Half<br>Sine-Wave<br>20<br>A aiPe e els<br>10<br>10<br>INCI)’. <8 SS S<br>0 || Mg SsNY I Ww 1 wySCITT CutTT<br>1 10 100 1 10 100<br>NUMBER OF CYCLES AT 60 Hz AS Pall | VR, DC REVERSE VOLTAGE (V)<br>Fig. 3 Max Non-Repetitive Peak Forward Surge Current Fig. 4  Typical Total Capacitance<br>, INSTANTANEOUS FORWARD CURRENT (A)<br>IF<br>, PEAK FORWARD SURGE CURRENT (A)<br>IFSM<br>T<br>  TOTAL CAPACITANCE (pF)<br>C<br>(AV)<br>, AVERAGE FORWARD RECTIFIED CURRENT (A)<br>I<br>**----- End of picture text -----**<br>


2 of 3 **www.diodes.com** 

1N4933 - 1N4937 Document number: DS26002  Rev. 8 - 3 

November 2018 © Diodes Incorporated 

**NOT RECOMMENDED FOR NEW DESIGN USE RS1A - RS1J Series 1N4933 - 1N4937** 

## **IMPORTANT NOTICE** 

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings > noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. **LIFE SUPPORT** Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: we A.   Life support devices or systems are devices or systems which: WD 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B.   A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. rye Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related OE information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2018, Diodes Incorporated CNA 

**www.diodes.com** 

3 of 3 **www.diodes.com** 

1N4933 - 1N4937 Document number: DS26002  Rev. 8 - 3 

November 2018 © Diodes Incorporated