SZMMSZ5232ET1G
Zener Single Diode, 5.6 V, 500 mW, SOD-123, 2 Pins, 150 °C, Surface Mount
- Manufacturer: ONSEMI
- Product type: Zener Single Diodes
- SVHC: No SVHC (15-Jan-2018)
- No. of Pins: 2Pins
- Product Range: SZMMSZ52xxET1G Series
- Qualification: AEC-Q101
- Diode Mounting: Surface Mount
- Diode Case Style: SOD-123
- Power Dissipation: 500mW
- Zener Voltage Nom: 5.6V
- Operating Temperature Max: 150°C
| Delivery and price | |
|---|---|
| Units per pack | 6000 |
| Price | 0.077 € |
| Current stock | 10+ |
| Lead time | 30 days |
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## Zener Voltage Regulators
## **500 mW SOD-123 Surface Mount**
## MMSZ52xxET1G Series, SZMMSZ52xxET1G Series
Two complete series of Zener diodes are offered in the convenient, surface mount plastic SOD-123 package. These devices provide a convenient alternative to the leadless 34-package style.
## **Features**
**SOD-123 CASE 425 STYLE 1**
1 2 Cathode Anode
## **MARKING DIAGRAM**
- 500 mW Rating on FR-4 or FR-5 Board
- Wide Zener Reverse Voltage Range − 2.4 V to 110 V
- Package Designed for Optimal Automated Board Assembly
**==> picture [54 x 9] intentionally omitted <==**
**----- Start of picture text -----**<br>
1 xxx M<br>**----- End of picture text -----**<br>
- Small Package Size for High Density Applications
- General Purpose, Medium Current
- ESD Rating of Class 3 (> 16 kV) per Human Body Model
- Peak Power − 225 W (8 x 20 s)
- SZ Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC-Q101 Qualified and PPAP Capable
- Pb-Free Packages are Available*
## **Mechanical Characteristics:**
> **CASE:** Void-free, transfer-molded, thermosetting plastic case **FINISH:** Corrosion resistant finish, easily solderable
## **MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:**
260 °C for 10 Seconds
**POLARITY:** Cathode indicated by polarity band **FLAMMABILITY RATING:** UL 94 V-0
## **MAXIMUM RATINGS**
|**MAXIMUM RATINGS**||||
|---|---|---|---|
|**Rating**<br>~~PC~~|**Symbol**<br>~~PC~~|**Max**<br>~~PC~~|**Units**<br>~~PC~~|
|Peak Power Dissipation @ 20 s (Note 1)<br>@ TL ≤25°C<br>~~ee~~|Ppk<br>~~ee~~|225<br>~~ee~~|W<br>~~ee~~|
|Total Power Dissipation on FR-5 Board,<br>(Note 3) @ TL= 75°C<br>Derated above 75°C<br>~~Pe~~|PD<br>~~Pe~~|500<br>6.7<br>~~Pe~~|mW<br>mW/°C<br>~~Pe~~|
|Thermal Resistance, (Note 2)<br>Junction-to-Ambient<br>~~et~~|R JA<br>~~et~~|340<br>~~et~~|°C/W<br>~~et~~|
|Thermal Resistance, (Note 2)<br>Junction-to-Lead<br>~~et~~|R JL<br>~~et~~<br>~~ee~~|150<br>~~et~~|°C/W<br>~~et~~|
|Junction and Storage Temperature Range<br>~~ee~~|TJ, Tstg<br>~~ee~~<br>~~ee~~|−55 to<br>+150<br>~~ee~~|°C<br>~~ee~~|
## Stresses exceeding those listed in the Maximum Ratings table may damage the
xxx = Device Code (Refer to page 2) M = Date Code = Pb-Free Package
(Note: Microdot may be in either location)
## **ORDERING INFORMATION**
|**Device**|**Package**|**Shipping**†|
|---|---|---|
|MMSZ52xxET1G|SOD-123<br>(Pb-Free)|3,000 /<br>Tape & Reel|
|SZMMSZ52xxET1G|SZMMSZ52xxET1G<br>SOD-123<br>(Pb-Free)|3,000 /<br>Tape & Reel|
- For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification 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.
device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected.
1. Nonrepetitive current pulse per Figure 11.
2. Thermal Resistance measurement obtained via infrared Scan Method.
3. FR-5 = 3.5 x 1.5 inches, using the minimum recommended footprint.
- For additional information on our Pb-Free strategy and soldering details, please download the **onsemi** Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
Publication Order Number: **MMSZ5221ET1/D**
**1**
© Semiconductor Components Industries, LLC, 2012 **October, 2025 − Rev. 10**
**MMSZ52xxET1G Series, SZMMSZ52xxET1G Series**
## **ELECTRICAL CHARACTERISTICS** (TA = 25 ° C unless
|**ELECTRICAL CHARACTERISTICS**(TA = 25A = 25= 25°C unless|**ELECTRICAL CHARACTERISTICS**(TA = 25A = 25= 25°C unless||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**ELECTRICAL CHARACTERISTICS**(TA = 25A = 25= 25°C unless||||||||||**I**|||||||
|otherwise noted, VF= 0.95 V Max. @ IF= 10 mA)|||||||||||||||||
|**Symbol**<br>**Parameter**<br>VZ<br>Reverse Zener Voltage @ IZT<br>IZT<br>Reverse Current<br>ZZT<br>Maximum Zener Impedance @ IZT<br>IZK<br>Reverse Current<br>ZZK<br>Maximum Zener Impedance @ IZK<br>IR<br>Reverse Leakage Current @ VR<br>VR<br>Reverse Voltage<br>IF<br>Forward Current<br>VF<br>Forward Voltage @ IF<br>~~=~~|||||VZ||**Zener Voltage Regulator**<br>IF<br>IR<br>IZT<br>VR<br>VF||||||||**V**||
|**ELECTRICAL CHARACTERISTICS**(TA= 25°C unless otherwise noted, VF= 0.9 V Max. @ I||||||= 0.9 V Max. @ I|||= 0.9 V Max. @ IF= 10 mA)||||||||
|**Device***<br>**Device**<br>**Marking**<br>**Zener Voltage**(Notes 4 and 5)<br>**VZ (V)**<br>**@ IZT**<br>**Min**<br>**Nom**<br>**Max**<br>**mA**<br>MMSZ5221ET1G<br>CA1<br>2.28<br>2.4<br>2.52<br>20<br>MMSZ5223ET1G<br>CA3<br>2.57<br>2.7<br>2.84<br>20<br>MMSZ5226ET1G<br>CA6<br>3.14<br>3.3<br>3.47<br>20<br>MMSZ5228ET1G<br>CA8<br>3.71<br>3.9<br>4.10<br>20<br>MMSZ5229ET1G<br>CA9<br>4.09<br>4.3<br>4.52<br>20<br>~~TAT ~~|||||**Zener Impedance**(Note 6)<br>**Leakage Current**<br>**ZZT @ IZT**<br>**ZZK @ IZK**<br>**IR @ VR**<br>**mA**<br>**A**<br>**V**<br>30<br>1200<br>0.25<br>100<br>1<br>30<br>1300<br>0.25<br>75<br>1<br>28<br>1600<br>0.25<br>25<br>1<br>23<br>1900<br>0.25<br>10<br>1<br>22<br>2000<br>0.25<br>5<br>1<br> ~~Tt~~||||||||||||
|MMSZ5231ET1G<br>CB2<br>4.85|5.1<br>5.36||20||17||||1600|||0.25||5|2||
|MMSZ5232ET1G<br>CB3<br>5.32|5.6<br>5.88||20||11||||1600|||0.25||5|3||
|MMSZ5234ET1G<br>CB5<br>5.89|6.2<br>6.51||20||7||||1000|||0.25||5|4||
|MMSZ5235ET1G<br>CB6<br>6.46|6.8<br>7.14||20||5||||750|||0.25||3|5||
|MMSZ5236ET1G<br>CB7<br>7.13|7.5<br>7.88||20||6||||500|||0.25||3|6||
|MMSZ5237ET1G<br>CB8<br>7.79|8.2<br>8.61||20||8||||500|||0.25||3|6.5||
|MMSZ5240ET1G<br>CC2<br>9.50|10<br>10.50||20||17||||600|||0.25||3|8||
|MMSZ5242ET1G<br>CC4<br>11.40|12<br>12.60||20||30||||600|||0.25||1|9.1||
|MMSZ5243ET1G<br>CC5<br>12.35|13<br>13.65||9.5||13||||600|||0.25||0.5|9.9||
|MMSZ5244ET1G<br>CC6<br>13.30|14<br>14.70||9.0||15||||600|||0.25||0.1|10||
|MMSZ5245ET1G<br>CC7<br>14.25|15<br>15.75||8.5||16||||600|||0.25||0.1|11||
|MMSZ5246ET1G<br>CC8<br>15.20|16<br>16.80||7.8||17||||600|||0.25||0.1|12||
|MMSZ5248ET1G<br>CD1<br>17.10|18<br>18.90||7.0||21||||600|||0.25||0.1|14||
|MMSZ5250ET1G<br>CD3<br>19.00|20<br>21.00||6.2||25||||600|||0.25||0.1|15||
|MMSZ5251ET1G<br>CD4<br>19.95|21<br>22.05||5.6||29||||600|||0.25||0.1|17||
|MMSZ5252ET1G<br>CD5<br>22.80|24<br>25.20||5.2||33||||600|||0.25||0.1|18||
4. The type numbers shown have a standard tolerance of ± 5% on the nominal Zener voltage.
5. Nominal Zener voltage is measured with the device junction in thermal equilibrium at TL = 30 ° C ± 1 ° C.
6. ZZT and ZZK are measured by dividing the AC voltage drop across the device by the ac current applied. The specified limits are for IZ(AC) = 0.1 IZ(dc) with the AC frequency = 1 kHz.
- *Include SZ-prefix devices where applicable
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|**Device***<br>~~CTT~~|**Device**<br>**Marking**<br>~~CTT~~|**Zener Voltage**(Notes 4 and 5)<br>~~CTT~~|**Zener Voltage**(Notes 4 and 5)<br>~~CTT~~|**Zener Voltage**(Notes 4 and 5)<br>~~CTT~~|**Zener Voltage**(Notes 4 and 5)<br>~~CTT~~|**Zener Impedance**(Note 6)<br>~~CTT~~|**Zener Impedance**(Note 6)<br>~~CTT~~|**Zener Impedance**(Note 6)<br>~~CTT~~|**Leakage Current**<br>~~CTT~~|**Leakage Current**<br>~~CTT~~|
|---|---|---|---|---|---|---|---|---|---|---|
|||**VZ (V)**<br>~~CTT~~|||**@ IZT**<br>~~CTT~~|**ZZT @ IZT**<br>~~CTT~~|**ZZK @ IZK**<br>~~CTT~~||**IR @ VR**<br>~~CTT~~||
|||**Min**<br>~~CTT~~|**Nom**<br>~~CTT~~|**Max**<br>~~CTT~~|**mA**<br>~~CTT~~|~~CTT~~|~~CTT~~|**mA**<br>~~CTT~~|**A**<br>~~CTT~~|**V**<br>~~CTT~~|
|MMSZ5253ET1G<br>MMSZ5254ET1G<br>MMSZ5255ET1G<br>MMSZ5256ET1G<br>MMSZ5257ET1G<br>~~CTT~~|CD6<br>CD7<br>CD8<br>CD9<br>CE1<br>~~CTT~~|23.75<br>25.65<br>26.60<br>28.50<br>31.35<br>~~CTT~~|25<br>27<br>28<br>30<br>33<br>~~CTT~~|26.25<br>28.35<br>29.40<br>31.50<br>34.65<br>~~CTT~~|5.0<br>4.6<br>4.5<br>4.2<br>3.8<br>~~CTT~~|35<br>41<br>44<br>49<br>58<br>~~CTT~~|600<br>600<br>600<br>600<br>700<br>~~CTT~~|0.25<br>0.25<br>0.25<br>0.25<br>0.25<br>~~CTT~~|0.1<br>0.1<br>0.1<br>0.1<br>0.1<br>~~CTT~~|19<br>21<br>21<br>23<br>25<br>~~CTT~~|
|MMSZ5258ET1G<br>MMSZ5259ET1G<br>MMSZ5262ET1G<br>MMSZ5263ET1G|CE2<br>CE3<br>CE6<br>CE7|34.20<br>37.05<br>48.45<br>53.20|36<br>39<br>51<br>56|37.80<br>40.95<br>53.55<br>58.80|3.4<br>3.2<br>2.5<br>2.2|70<br>80<br>125<br>150|700<br>800<br>1100<br>1300|0.25<br>0.25<br>0.25<br>0.25|0.1<br>0.1<br>0.1<br>0.1|27<br>30<br>39<br>43|
4. The type numbers shown have a standard tolerance of ± 5% on the nominal Zener voltage.
5. Nominal Zener voltage is measured with the device junction in thermal equilibrium at TL = 30 ° C ± 1 ° C.
6. ZZT and ZZK are measured by dividing the AC voltage drop across the device by the ac current applied. The specified limits are for IZ(AC) = 0.1 IZ(dc) with the AC frequency = 1 kHz.
- *Include SZ-prefix devices where applicable
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**MMSZ52xxET1G Series, SZMMSZ52xxET1G Series**
## **TYPICAL CHARACTERISTICS**
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8 100<br>7 TYPICAL TC VALUES TYPICAL TC VALUES<br>6 FOR MMSZ5221BT1G SERIES FOR MMSZ5221BT1G SERIES<br>Ane > aaann<br>5<br>4 V Z @ I ZT V Z @ I ZT<br>See ee eee || |<br>3<br>| | | A | 10 |<br>2<br>1 SECC4 aLFesGOPEL.GO |<br>0 PTE eeees GO OG GO GO |<br>−1 aBS eeee<br>−2<br>−3 fF | | [| | | [| [| | [| | 1 ET<br>2 3 4 5 6 7 8 9 10 11 12 10 100<br>VZ, NOMINAL ZENER VOLTAGE (V) VZ, NOMINAL ZENER VOLTAGE (V)<br>Figure 1. Temperature Coefficients Figure 2. Temperature Coefficients<br>(Temperature Range −55 ° C to +150 ° C) (Temperature Range −55 ° C to +150 ° C)<br>1.2 1000<br>RECTANGULAR<br>1.0 WAVEFORM, T A = 25 ° C<br>0.8 we PD versus TL | 100 St<br>0.6<br>PD versus TA<br>0.4 | waeNN, 10 apeallfe<br>0.2<br>0 Py Pf> I TSS: 1 EI P TEt STon<br>0 25 50 75 100 125 150 0.1 1 10 100 1000<br>T, TEMPERATURE ( ° C) PW, PULSE WIDTH (ms)<br>Figure 3. Steady State Power Derating Figure 4. Maximum Nonrepetitive Surge Power<br>1000 1000<br>TJ = 25 ° C 75 V (MMSZ5267BT1)<br>IZ(AC) = 0.1 IZ(DC) 91 V (MMSZ5270BT1)<br>I Z = 1 mA f = 1 kHz<br>pe oe —NNES=="—— 2<br>100 100<br>ptIN| = LL ree<br>5 mA<br>20 mA<br>10 = EER A HT 10 Ltt | tA tA ffi ft<br>py Neem ZA LEess<br>1 poPTNNTNTT 1 Fae 150 ° C dey 75 ° C 25 antA ° C 0 ° C CEEDDL<br>1 10 100 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2<br>VZ, NOMINAL ZENER VOLTAGE VF, FORWARD VOLTAGE (V)<br>C) C)<br>° °<br>, TEMPERATURE COEFFICIENT (mV/ , TEMPERATURE COEFFICIENT (mV/<br>VZ VZ<br>, POWER DISSIPATION (WATTS) , PEAK SURGE POWER (WATTS)<br>D pk<br>P P<br>)<br>, DYNAMIC IMPEDANCE ( , FORWARD CURRENT (mA)<br>ZZT IF<br>**----- End of picture text -----**<br>
**Figure 5. Effect of Zener Voltage on Zener Impedance**
**Figure 6. Typical Forward Voltage**
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## **TYPICAL CHARACTERISTICS**
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**----- Start of picture text -----**<br>
1000 1000<br>a 0 V BIAS See TA = 25 ° C 100<br>1 V BIAS<br>~ 10 ee<br>100 / “SSS oeTTT)ee eanHSS=—--=== aan SSSSSssae= = == = ===ee == ee<br>ee 1 tt<br>es es Da a _-— 3 —<br>BIAS AT50% OF V Z NOM ————PTE NO 0.1 tt——E>~—_—=_=>>>>>>E>E>E>E>__—_E——E—==—= +150 ° C<br>0.01<br>10 HE SK ELTTT eee<br>+25 ° C<br>— EEE 0.001 =<br>oe SSS Sa SS SS SSSe −55 ° C<br>0.0001<br>a OO OO 56S SSeS eee<br>1 FT LE TEE EE TT 0.00001 SSS SSeS<br>1 10 100 0 10 20 30 40 50 60 70 80 90<br>VZ, NOMINAL ZENER VOLTAGE (V) VZ, NOMINAL ZENER VOLTAGE (V)<br>Figure 7. Typical Capacitance Figure 8. Typical Leakage Current<br>100 100<br>TA = 25A = 25 = 255 ° C TAA = 25 25 ° C<br>SSSeSe<br>10 10<br>ee 2 2 eeeSSSS =JfJf {|_| _} |_| __| __| [[//_[|__|]]<br>1 2s ee ee ee 1 eeeeeeee ee<br>0.1 ee ee eee ie 0.1 eeeeeeee<br>0.01 TT 0.01 | A<br>0 2 4 6 8 10 12 10 30 50 70 90<br>VZ, ZENER VOLTAGE (V)Z, ZENER VOLTAGE (V), ZENER VOLTAGE (V) VZ, ZENER VOLTAGE (V)Z, ZENER VOLTAGE (V), ZENER VOLTAGE (V)<br>Figure 9. Zener Voltage versus Zener Current Figure 10. Zener Voltage versus Zener Current<br>(VZ Up to 12 V) (12 V to 91 V)<br>100<br>a tr PEAK VALUE IRSM @ 8 s<br>9080 ie PULSE WIDTH (tP) IS DEFINED<br>AS THAT POINT WHERE THE<br>TIN<br>70 PEAK CURRENT DECAY = 8 s<br>60<br>pf At "<br>5040 r/ee| A HALF VALUE IRSM/2 @ 20 s<br>30<br>( tP Nee<br>20<br>f— — | NJ Tt<br>10 e e<br>0 P| [| | [| ee ee<br>0 20 40 60 80<br>t, TIME ( u s)<br>A)<br>, LEAKAGE CURRENT (<br>IR<br>C, CAPACITANCE (pF)<br>, ZENER CURRENT (mA) , ZENER CURRENT (mA)<br>IZZ IZZ<br>% OF PEAK PULSE CURRENT<br>**----- End of picture text -----**<br>
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**----- Start of picture text -----**<br>
100 100<br>TA = 25A = 25 = 255 ° C TAA = 25 25 ° C<br>SSSeSe<br>10 10<br>ee 2 2 eeeSSSS =JfJf {|_| _} |_| __| __| [[//_[|__|]]<br>1 2s ee ee ee 1 eeeeeeee ee<br>0.1 ee ee eee ie 0.1 eeeeeeee<br>0.01 TT 0.01 | A<br>0 2 4 6 8 10 12 10 30 50 70 90<br>VZ, ZENER VOLTAGE (V)Z, ZENER VOLTAGE (V), ZENER VOLTAGE (V) VZ, ZENER VOLTAGE (V)Z, ZENER VOLTAGE (V), ZENER VOLTAGE (V)<br>, ZENER CURRENT (mA) , ZENER CURRENT (mA)<br>IZZ IZZ<br>**----- End of picture text -----**<br>
**Figure 11. 8** × **20 s Pulse Waveform** w
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## **REVISION HISTORY**
|**Revision**<br>**Description of Changes**<br>**Date**<br>10<br>Addition of MMSZ5251ET1G row to Electrical Characteristics table (p.2)<br>10/3/2025<br>This document has undergone updates prior to the inclusion of this revision history table. The changes tracked here only reflect updates made<br>~~—~~|
|---|
|on the noted approval dates.|
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MECHANICAL CASE OUTLINE **PACKAGE DIMENSIONS**
**SOD−123 2−LEAD, 1.60x2.69x1.16** CASE 425 ISSUE H
DATE 29 FEB 2024
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Ө 1<br>Ө 1<br>ee<br>**----- End of picture text -----**<br>
## **GENERIC**
## **MARKING DIAGRAM***
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**----- Start of picture text -----**<br>
XXXM<br>1<br>XXX = Specific Device Code<br>M = Date Code<br>= Pb−Free Package<br>**----- End of picture text -----**<br>
(Note: Microdot may be in either location)
- *This information is generic. Please refer to device data sheet for actual part marking. Pb−Free indicator, “G” or microdot “ ”, may or may not be present. Some products may not follow the Generic Marking.
STYLE 1: PIN 1. CATHODE 2. ANODE
Electronic versions are uncontrolled except when accessed directly from the Document Repository. **DOCUMENT NUMBER: 98ASB42927B** Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red. **DESCRIPTION: SOD−123 2−LEAD, 1.60x2.69x1.16 PAGE 1 OF 1**
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Updated at April 1, 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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When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
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We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →