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1SMA5940BT3G
Zener Single Diode, 43 V, 1.5 W, DO-214AC (SMA), 2 Pins, 150 °C, Surface Mount
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: ONSEMI
- Product type: Zener Single Diodes
- ZENER VOLTA; Zener Voltage Vz Typ:43V; Power Dissipation Pd:1.5W; Diode Case Style:DO-214AC; Zener Tolerance ±:5%; No. of Pins:2Pins; Operating Temperature Max:150°C; Product Range:1SMA5940BT
- SVHC: Lead (25-Jun-2025)
- No. of Pins: 2Pins
- Product Range: 1SMA5940BT3
- Qualification: -
- Diode Mounting: Surface Mount
- Diode Case Style: DO-214AC (SMA)
- Power Dissipation: 1.5W
- Zener Voltage Nom: 43V
- Operating Temperature Max: 150°C
| Delivery and price | |
|---|---|
| Units per pack | 15000 |
| Price | 0.074 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
## 1SMA59xxBT3G Series, SZ1SMA59xxBT3G Series ## 1.5 Watt Plastic Surface Mount Zener Voltage Regulators This complete new line of 1.5 Watt Zener Diodes offers the following advantages. **www.onsemi.com** ## **Features** - Standard Zener Breakdown Voltage Range − 3.3 V to 68 V - ESD Rating of Class 3 (> 16 kV) per Human Body Model - Flat Handling Surface for Accurate Placement **==> picture [44 x 27] intentionally omitted <==** **----- Start of picture text -----**<br> SMA<br>CASE 403D<br>STYLE 1<br>**----- End of picture text -----**<br> - Package Design for Top Slide or Bottom Circuit Board Mounting - Low Profile Package - Ideal Replacement for MELF Packages **==> picture [134 x 7] intentionally omitted <==** **----- Start of picture text -----**<br> CATHODE ANODE<br>**----- End of picture text -----**<br> - AEC−Q101 Qualified and PPAP Capable − SZ1SMA59xxBT3G - SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements ## **MARKING DIAGRAM** - These are Pb−Free Devices* ## **Mechanical Characteristics:** > **CASE:** Void-free, transfer-molded plastic **FINISH:** All external surfaces are corrosion resistant with readily solderable leads **MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:** 260°C for 10 seconds **POLARITY:** Cathode indicated by molded polarity notch or cathode band **==> picture [145 x 100] intentionally omitted <==** **----- Start of picture text -----**<br> 8xxB<br>AYWW<br>8xxB = Device Code (Refer to page 2)<br>A = Assembly Location<br>Y = Year<br>WW = Work Week<br>= Pb−Free Package<br>**----- End of picture text -----**<br> **FLAMMABILITY RATING:** UL 94 V−0 @ 0.125 in ## **MAXIMUM RATINGS** **Rating Symbol Value Unit** DC Power Dissipation @ TL = 75 ° C, PD Measured Zero Lead Length (Note 1) 1.5 W Derate above 75 ° C 20 mW/ ° C Thermal Resistance, Junction−to−Lead R JL 50 ° C/W DC Power Dissipation @ TA = 25 ° C (Note 2) PD 0.5 W Derate above 25 ° C 4.0 mW/ ° C Thermal Resistance, Junction−to−Ambient R JA 250 ° C/W Operating and Storage Temperature Range TJ, Tstg −65 to ° C +150 ~~—o~~ Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. **ORDERING INFORMATION Device Package Shipping**[†] 1SMA59xxBT3G SMA 5,000 / (Pb−Free) Tape & Reel SZ1SMA59xxBT3G SMA 5,000 / (Pb−Free) Tape & Reel ~~a~~ †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. ## **DEVICE MARKING INFORMATION** See specific marking information in the device marking column of the Electrical Characteristics table on page 2 of this data sheet. 1. 1 in square copper pad, FR−4 board. 2. FR−4 Board, using ON Semiconductor minimum recommended footprint. *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Publication Order Number: **1** © Semiconductor Components Industries, LLC, 2016 **August, 2016 − Rev. 10** **1SMA5913BT3/D** **1SMA59xxBT3G Series, SZ1SMA59xxBT3G Series** ## **ELECTRICAL CHARACTERISTICS** (TA = 25 ° C unless otherwise noted, VF = 1.2 V Max. @ IF = 200 mA for all types) |otherwise n|oted, VF= 1.2 V Max. @ IF= 200 mA for all types)| |---|---| |**Symbol**|**Parameter**| |VZ|Reverse Zener Voltage @ IZT| |IZT|Reverse Current| |ZZT|Maximum Zener Impedance @ IZT| |IZK|Reverse Current| |ZZK|Maximum Zener Impedance @ IZK| |IR|Reverse Leakage Current @ VR| |VR|Reverse Voltage| |IF|Forward Current| |VF|Forward Voltage @ IF| |IZM|Maximum DC Zener Current| **==> picture [173 x 151] intentionally omitted <==** **----- Start of picture text -----**<br> I<br>IF<br>VZ VR<br>V<br>IR VF<br>IZT<br>**----- End of picture text -----**<br> **Zener Voltage Regulator** ## **ELECTRICAL CHARACTERISTICS** (TA = 25 ° C unless otherwise noted, VF = 1.2 V Max. @ IF = 200 mA for all types) |**Device***(Note 3)|**Device**<br>**Marking**|**Zener Voltage**(Note 4)|**Zener Voltage**(Note 4)|**Zener Voltage**(Note 4)|**Zener Voltage**(Note 4)|**Zener Impedance**|**Zener Impedance**|**Zener Impedance**|**Leakage Current**|**Leakage Current**|**IZM**| |---|---|---|---|---|---|---|---|---|---|---|---| |||**VZ (Volts)**|||**@ IZT**|**ZZT @ IZT**|**ZZK @ IZK**||**IR @ VR**||| |||**Min**|**Nom**|**Max**|**mA**|**�**|**�**|**mA**|**�A**|**Volts**|**mA(dc)**| |1SMA5913BT3G<br>1SMA5914BT3G<br>1SMA5915BT3G<br>1SMA5916BT3G|813B<br>814B<br>815B<br>816B|3.13<br>3.42<br>3.70<br>4.08|3.3<br>3.6<br>3.9<br>4.3|3.47<br>3.78<br>4.10<br>4.52|113.6<br>104.2<br>96.1<br>87.2|10<br>9.0<br>7.5<br>6.0|500<br>500<br>500<br>500|1.0<br>1.0<br>1.0<br>1.0|50<br>35.5<br>12.5<br>2.5|1.0<br>1.0<br>1.0<br>1.0|455<br>417<br>385<br>349| |1SMA5917BT3G<br>1SMA5918BT3G<br>1SMA5919BT3G<br>1SMA5920BT3G|817B<br>818B<br>819B<br>820B|4.46<br>4.84<br>5.32<br>5.89|4.7<br>5.1<br>5.6<br>6.2|4.94<br>5.36<br>5.88<br>6.51|79.8<br>73.5<br>66.9<br>60.5|5.0<br>4.0<br>2.0<br>2.0|500<br>350<br>250<br>200|1.0<br>1.0<br>1.0<br>1.0|2.5<br>2.5<br>2.5<br>2.5|1.5<br>2.0<br>3.0<br>4.0|319<br>294<br>268<br>242| |1SMA5921BT3G<br>1SMA5922BT3G<br>1SMA5923BT3G<br>1SMA5924BT3G|821B<br>822B<br>823B<br>824B|6.46<br>7.12<br>7.79<br>8.64|6.8<br>7.5<br>8.2<br>9.1|7.14<br>7.88<br>8.61<br>9.56|55.1<br>50<br>45.7<br>41.2|2.5<br>3.0<br>3.5<br>4.0|200<br>400<br>400<br>500|1.0<br>0.5<br>0.5<br>0.5|2.5<br>2.5<br>2.5<br>2.5|5.2<br>6.0<br>6.5<br>7.0|221<br>200<br>183<br>165| |1SMA5925BT3G<br>1SMA5926BT3G<br>1SMA5927BT3G<br>1SMA5928BT3G|825B<br>826B<br>827B<br>828B|9.5<br>10.45<br>11.4<br>12.35|10<br>11<br>12<br>13|10.5<br>11.55<br>12.6<br>13.65|37.5<br>34.1<br>31.2<br>28.8|4.5<br>5.5<br>6.5<br>7.0|500<br>550<br>550<br>550|0.25<br>0.25<br>0.25<br>0.25|2.5<br>0.5<br>0.5<br>0.5|8.0<br>8.4<br>9.1<br>9.9|150<br>136<br>125<br>115| |1SMA5929BT3G<br>1SMA5930BT3G<br>1SMA5931BT3G<br>1SMA5932BT3G|829B<br>830B<br>831B<br>832B|14.25<br>15.2<br>17.1<br>19|15<br>16<br>18<br>20|15.75<br>16.8<br>18.9<br>21|25<br>23.4<br>20.8<br>18.7|9.0<br>10<br>12<br>14|600<br>600<br>650<br>650|0.25<br>0.25<br>0.25<br>0.25|0.5<br>0.5<br>0.5<br>0.5|11.4<br>12.2<br>13.7<br>15.2|100<br>94<br>83<br>75| |1SMA5933BT3G<br>1SMA5934BT3G<br>1SMA5935BT3G<br>1SMA5936BT3G|833B<br>834B<br>835B<br>836B|20.9<br>22.8<br>25.65<br>28.5|22<br>24<br>27<br>30|23.1<br>25.2<br>28.35<br>31.5|17<br>15.6<br>13.9<br>12.5|17.5<br>19<br>23<br>26|650<br>700<br>700<br>750|0.25<br>0.25<br>0.25<br>0.25|0.5<br>0.5<br>0.5<br>0.5|16.7<br>18.2<br>20.6<br>22.8|68<br>63<br>56<br>50| |1SMA5937BT3G<br>1SMA5938BT3G<br>1SMA5939BT3G<br>1SMA5940BT3G|837B<br>838B<br>839B<br>840B|31.35<br>34.2<br>37.05<br>40.85|33<br>36<br>39<br>43|34.65<br>37.8<br>40.95<br>45.15|11.4<br>10.4<br>9.6<br>8.7|33<br>38<br>45<br>53|800<br>850<br>900<br>950|0.25<br>0.25<br>0.25<br>0.25|0.5<br>0.5<br>0.5<br>0.5|25.1<br>27.4<br>29.7<br>32.7|45<br>42<br>38<br>35| |1SMA5941BT3G<br>1SMA5942BT3G<br>1SMA5943BT3G<br>1SMA5945BT3G|841B<br>842B<br>843B<br>845B|44.65<br>48.45<br>53.2<br>64.6|47<br>51<br>56<br>68|49.35<br>53.55<br>58.8<br>71.4|8.0<br>7.3<br>6.7<br>5.5|67<br>70<br>86<br>120|1000<br>1100<br>1300<br>1700|0.25<br>0.25<br>0.25<br>0.25|0.5<br>0.5<br>0.5<br>0.5|35.8<br>38.8<br>42.6<br>51.7|32<br>29<br>27<br>22| 3. Tolerance and Voltage Regulation Designation − The type number listed indicates a tolerance of ± 5%. 4. VZ limits are to be guaranteed at thermal equilibrium. - Include SZ-prefix devices where applicable. **www.onsemi.com** **2** **1SMA59xxBT3G Series, SZ1SMA59xxBT3G Series** ## **RATING AND TYPICAL CHARACTERISTIC CURVES (TA = 25** ° **C)** **==> picture [489 x 169] intentionally omitted <==** **----- Start of picture text -----**<br> 4 100<br>3.2<br>10<br>2.4<br>T L<br>1.6<br>1<br>0.8<br>T A<br>0 0.1<br>0 25 50 75 100 125 150 0 2 4 6 8 10<br>T, TEMPERATURE (°C) VZ, ZENER VOLTAGE (VOLTS)<br>IZ, ZENER CURRENT (mA)<br>PD, MAXIMUM POWER DISSIPATION (WATTS)<br>**----- End of picture text -----**<br> **Figure 1. Steady State Power Derating** **Figure 2. VZ − 3.3 thru 10 Volts** **==> picture [491 x 392] intentionally omitted <==** **----- Start of picture text -----**<br> 100 10<br>8 V Z @ I ZT<br>6<br>10<br>4<br>2<br>1<br>0<br>-2<br>0.1 -4<br>0 10 20 30 40 50 60 70 80 2 4 6 8 10 12<br>VZ, ZENER VOLTAGE (VOLTS) VZ, ZENER VOLTAGE (VOLTS)<br>Figure 3. VZ = 12 thru 68 Volts Figure 4. Zener Voltage − 3.3 to 12 Volts<br>100<br>70 VZ @ IZT 100<br>IZ(dc) = 1 mA<br>50<br>30<br>10 10 mA<br>20<br>IZ(rms) = 0.1 IZ(dc)<br>20 mA<br>10<br>10 20 30 50 70 100 10 100<br>VZ, ZENER VOLTAGE (VOLTS) VZ, ZENER VOLTAGE (VOLTS)<br>°<br>, ZENER CURRENT (mA)<br>IZ<br>, TEMPERATURE COEFFICIENT (mV/ C)<br>VZ<br>θ<br>°<br>, TEMPERATURE COEFFICIENT (mV/ C) ZZ, DYNAMIC IMPEDANCE (OHMS)<br>VZ<br>θ<br>**----- End of picture text -----**<br> **Figure 5. Zener Voltage − 12 to 68 Volts** **Figure 6. Effect of Zener Voltage** **www.onsemi.com** **3** **1SMA59xxBT3G Series, SZ1SMA59xxBT3G Series** ## **RATING AND TYPICAL CHARACTERISTIC CURVES (TA = 25** ° **C)** **==> picture [489 x 405] intentionally omitted <==** **----- Start of picture text -----**<br> 1000 10<br>NONREPETITIVE, EXPONENTIAL<br>MEASURED @ PULSE WAVEFORM, TJ = 25°C<br>ZERO BIAS<br>1<br>MEASURED @<br>100 VZ/2<br>0.1<br>TJ = 25°C<br>10 0.01<br>10 100 0.01 0.1 1 10<br>BREAKDOWN VOLTAGE (VOLTS) TP, PULSE WIDTH (ms)<br>Figure 7. Capacitance Curve Figure 8. Typical Pulse Rating Curve<br>120 120<br>100 ≤ 10 �s TPW (IA = 25D) IS DEFINED AS THE°C 100 8/20 AS DEFINED BY ANSI C62.1�s WAVEFORM<br>POINT WHERE THE PEAK CURRENT<br>PEAK VALUE DECAYS TO 50% OF Ipp. 0.9 IPEAK AND IEC 801-5.<br>80 I 80<br>ppm<br>60 HALF VALUE - Ipp/2 60 0.5 IPEAK<br>40 40<br>10/1000 �s WAVEFORM<br>AS DEFINED BY R.E.A.<br>20 20<br>t d<br>0.1 IPEAK T = 8 �s<br>0 0<br>0 1 2 3 4 5 0 0.02 0.04 0.06 0.08 0.1<br>t, TIME (ms) T t, TIME (ms)<br>20 �s<br>, PEAK POWER (kW)<br>C, CAPACITANCE (pF) Ppk<br>CURRENT (%)<br>Ippm, PEAK PULSE<br>Ippm, PEAK PULSE CURRENT (%)<br>**----- End of picture text -----**<br> **Figure 9. Pulse Waveform** **Figure 10. Pulse Waveform** **www.onsemi.com** **4** **1SMA59xxBT3G Series, SZ1SMA59xxBT3G Series** ## **PACKAGE DIMENSIONS** **SMA** CASE 403D ISSUE H **==> picture [471 x 387] intentionally omitted <==** **----- Start of picture text -----**<br> HE<br>NOTES:<br>1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M,<br>E 1982.<br>2. CONTROLLING DIMENSION: INCH.<br>3. DIMENSION b SHALL BE MEASURED WITHIN DIMENSION L.<br>=<br>MILLIMETERS INCHES<br>DIM MIN NOM MAX MIN NOM MAX<br>b D A 1.97 2.10 2.20 0.078 0.083 0.087<br>A1 0.05 0.10 0.20 0.002 0.004 0.008<br>b 1.27 1.45 1.63 0.050 0.057 0.064<br>c 0.15 0.28 0.41 0.006 0.011 0.016<br>D 2.29 2.60 2.92 0.090 0.103 0.115<br>Le POLARITY INDICATOR<br>OPTIONAL AS NEEDED bay S=SSa= E 4.06 4.32 4.57 0.160 0.170 = 0.180<br>(SEE STYLES) H E 4.83 5.21 5.59 0.190 0.205 0.220<br>L 0.76 1.14 1.52 0.030 0.045 0.060<br>STYLE 1:<br>PIN 1. CATHODE (POLARITY BAND)<br>2. ANODE<br>A<br>A1<br>=], L c Sn<br>SOLDERING FOOTPRINT*<br>4.000<br>0.157<br>2.000<br>0.079<br>oy<br>oe<br>2.000<br>|<br>0.079<br>SCALE 8:1 mm<br>(—) inches<br>*For additional information on our Pb−Free strategy and soldering<br>details, please download the ON Semiconductor Soldering and<br>Mounting Techniques Reference Manual, SOLDERRM/D.<br>**----- End of picture text -----**<br> ON Semiconductor and the are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. ## **PUBLICATION ORDERING INFORMATION** ## **LITERATURE FULFILLMENT** : Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA **Phone** : 303−675−2175 or 800−344−3860 Toll Free USA/Canada **Fax** : 303−675−2176 or 800−344−3867 Toll Free USA/Canada **Email** : orderlit@onsemi.com **N. American Technical Support** : 800−282−9855 Toll Free USA/Canada **ON Semiconductor Website** : **www.onsemi.com** **Europe, Middle East and Africa Technical Support: Order Literature** : http://www.onsemi.com/orderlit Phone: 421 33 790 2910 **Japan Customer Focus Center** For additional information, please contact your local Phone: 81−3−5817−1050 Sales Representative **www.onsemi.com** **1SMA5913BT3/D** **5**
Updated at April 11, 2026
onsemi is a premier global supplier of intelligent power and sensing technologies, driving disruptive innovations across the automotive, industrial, and cloud infrastructure markets. Recognized for their commitment to sustainability and reliable supply chains, the company accelerates advancements in vehicle electrification, industrial automation, and 5G networks by solving the industry's most complex design challenges. At the core of their portfolio is an industry-leading selection of discrete semiconductors. This extensive range features thousands of high-performance bipolar transistors, single and dual MOSFETs, and a comprehensive array of diodes, including Zener, Schottky, and fast-recovery rectifiers. Engineered for superior thermal performance and energy efficiency, these foundational components are critical for demanding power conversion, switching, and signal conditioning applications. Beyond essential discretes, onsemi provides a robust suite of advanced power management and circuit protection solutions. Their lineup includes intelligent power modules, single IGBTs, and transient voltage suppression (TVS) diodes designed to safeguard sensitive circuitry. Complimented by integrated passive filters, AC/DC LED driver ICs, and specialized sub-2.4GHz RF transceivers, onsemi equips engineers with the scalable, high-quality technologies needed to build a cleaner, smarter, and more connected world.
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