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MMSZ5231B, in 3D

MMSZ5231B

Diodes Incorporated

-65℃~+150℃ 1 Independent 1.6kΩ 17Ω 370mW 4.85V~5.36V 5.1V 5uA@2V SOD-123 Zener Diodes ROHS

Extended
DatasheetJLCPCBLCSCdiodes/MMSZ5231B
Category
Zener Diodes
Package
SOD-123
Pins
2

Overview

The MMSZ5231B is a zener Diode made by Diodes Incorporated in a SOD-123 package with 2 pins. -65℃~+150℃ 1 Independent 1.6kΩ 17Ω 370mW 4.85V~5.36V 5.1V 5uA@2V SOD-123 Zener Diodes ROHS.

PCBKit's library has its KiCad symbol (Device:D_Zener, from KiCad's library) and its footprint (Diode_SMD:D_SOD-123, from KiCad's library), ready for a KiCad board. 70,731 are in stock at JLCPCB (part C85181). 6 open-source boards in 3 repositories on GitHub use it.

Symbol

Device:D_ZenerFrom KiCad's library

Footprint

12
Diode_SMD:D_SOD-123From KiCad's library

From the datasheet

3
Forward voltage
900 mV · max at IF = 10 mA · p. 2
Junction to air (SOD123)
338 K/W · junction to ambient air; FR-4 PCB with 1 inch copper pad layout · p. 2
Junction, hottest
150 °C · max operating junction temperature · p. 2

What it is and has

4
Power dissipation
500mW · p. 1
Package
SOD123 · p. 1
Qualification
AEC-Q101 · p. 1
Polarity marking
Cathode band · p. 1

Specifications

10
ParameterConditionsAs printedPage
Forward Voltage VFIF = 10mAmax 0.9 V2
Power Dissipation PDNote 4; TL = +75°Cmax 500 mW2
Power Dissipation PDNote 5; TA = +25°C; device mounted on FR-4 PCB with 1 inch copper pad layoutmax 370 mW2
Thermal Resistance, Junction to Ambient Air RθJANote 5; device mounted on FR-4 PCB with 1 inch copper pad layouttyp 338 °C/W2
Operating and Storage Temperature Range TJ, TSTGmin -65 · max 150 °C2
Zener Voltage Range (Note 6) VZMMSZ5231B; IZT = 20 mA; typ field represents nominal voltage; short duration pulse testmin 4.85 · typ 5.1 · max 5.36 V2
Test Current IZTMMSZ5231B; specified test currenttyp 20 mA2
Maximum Zener Impedance ZZTMMSZ5231B; IZT = 20 mA; f = 1KHzmax 17 Ω2
Maximum Zener Impedance ZZKMMSZ5231B; IZK = 0.25mA; f = 1KHzmax 1600 Ω2
Maximum Reverse Leakage Current (Note 6) IRMMSZ5231B; VR = 2.0 V; short duration pulse testmax 5 A2

Parameters

11
Diode Configuration
1 Independent
Impedance(Zzk)
1.6kΩ
Impedance(Zzt)
17Ω
Junction Temperature(Max)
150℃
Operating Junction Temperature Range
-65℃~+150℃
Pd - Power Dissipation
370mW
Reverse Leakage Current (Ir)
5uA
Thermal Resistance(Junction to Ambient)
338℃/W
Voltage - Forward(Vf)
900mV
Zener Voltage(Nom)
5.1V
Zener Voltage(Range)
4.85V~5.36V

Order codes

2

Pinout

2
The pins of the MMSZ5231B
PinNameType
1KPassive
2APassive

Open-source boards using it

All 6
  • 6 layers150 × 100 mmNV Meter rev b, the printed circuit board in 3D

    NV Meter rev b

    curtisseizert/Nanovoltmeter

    A low noise nanovoltmeter design files and code

    552 parts44
  • 4 layers90 × 95 mmWiegand bridge, the printed circuit board in 3D

    Wiegand bridge

    EdgeCoil/wiegand-bridge

    ESP32-S3 Wiegand reader bridge for Home Assistant: 4-layer board, BOM and ESPHome firmware.

    197 parts1
  • 4 layersESP32Sensor, the printed circuit board in 3D

    ESP32Sensor

    LESA-RPI/hfs.main

    Horticulture Fluorescence Sensor Project

    95 parts1
  • 4 layers42 × 44 mmWiegand bridge lite, the printed circuit board in 3D

    Wiegand bridge lite

    EdgeCoil/wiegand-bridge

    ESP32-S3 Wiegand reader bridge for Home Assistant: 4-layer board, BOM and ESPHome firmware.

    75 parts1

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Questions

Is there a KiCad symbol and footprint for the MMSZ5231B?

Yes. The symbol is Device:D_Zener and the footprint Diode_SMD:D_SOD-123, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the MMSZ5231B?

SOD-123, with 2 pins. Its footprint is drawn on this page.

Where is the MMSZ5231B datasheet?

Diodes Incorporated publishes it: the Datasheet link on this page opens it.

Where can I order the MMSZ5231B?

JLCPCB lists it as part C85181, with 70,731 in stock; the sellers' links on this page open their listings.

What can replace the MMSZ5231B?

Parts like it in the library: the BZT52B5V1 by hongjiacheng, the BZT52C5V1 by MDD, the BZT52C5V1 by Jiangsu Changjing Electronics Technology (CJ) and the BZT52C5V1 by GOODWORK. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the MMSZ5231B?

6 boards in 3 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8