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ZM4728A

STMicroelectronicsExtended

1 Independent 10Ω 150uA@1V 1W 3.3V 400Ω LL-41 Zener Diodes ROHS

DatasheetJLCPCBLCSC
Part id
st/ZM4728A
Category
Zener Diodes
Package
LL-41
Pins
2
In stock
0 at JLCPCB (C38989)
Used on
4 open-source boards

Overview

The ZM4728A is a zener Diode made by STMicroelectronics in a LL-41 package with 2 pins. 1 Independent 10Ω 150uA@1V 1W 3.3V 400Ω LL-41 Zener Diodes ROHS.

PCBKit's library has its KiCad symbol (Device:D_Zener, from KiCad's library) and its footprint (Diode_SMD:D_MELF, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C38989). 4 open-source boards in 1 repository on GitHub use it.

Symbol

Device:D_ZenerFrom KiCad's library

Footprint

12
Diode_SMD:D_MELFFrom KiCad's library

From the datasheet

3
Junction, hottest
175 °C · maximum junction temperature · p. 1
Junction to air (LL-41)
170 K/W · max, electrodes kept at ambient temperature · p. 1
Forward voltage
1.2 V · max at IF = 200 mA, Ta = 25℃ · p. 1

What it is and has

2
Device type
Silicon Planar Power Zener Diodes · p. 1
Zener voltage tolerance
±5% (suffix A) · p. 1

Specifications

11
ParameterConditionsAs printedPage
Power Dissipation PtotElectrodes kept at ambient temperaturemax 1 W1
Junction Temperature Tjmax 175 ℃1
Storage Temperature Range Tstgmin -65 · max 175 ℃1
Thermal Resistance Junction to Ambient Air RθJALL-41; electrodes kept at ambient temperaturemax 170 K/W1
Forward Voltage VFat IF = 200 mAmax 1.2 V1
Zener Voltage VZnomZM4728A; at IZT = 76 mA; nominal voltage; tested with pulses tp = 20 mstyp 3.3 V2
Dynamic Resistance ZZTZM4728A; at IZT = 76 mAmax 10 Ω2
Dynamic Resistance ZZKZM4728A; at IZK = 1 mAmax 400 Ω2
Reverse Current IRZM4728A; at VR = 1 Vmax 150 uA2
Maximum Surge Current IZSMZM4728A; Ta = 25℃; maximum peak, non-repetitive reverse surge current; 1/2 square wave or equivalent sine wave pulse of 1/120 second duration superimposed on IZTmax 1375 mA2
Maximum Regulator Current IZMZM4728A; electrodes kept at ambient temperaturemax 275 mA2

Open-source boards using it

4
  • 2 layers99 × 57.5 mmBL706 Robot, the printed circuit board in 3D

    BL706 Robot

    tomrodinger/line_following_robot

    The code for the line following robot that runs on BL702/BL706

    105 partsApache-2.0
  • 2 layers99 × 57.5 mmBL706 Robot, the printed circuit board in 3D

    BL706 Robot

    tomrodinger/line_following_robot

    The code for the line following robot that runs on BL702/BL706

    83 partsApache-2.0
  • 2 layers99 × 57.5 mmBL706 Robot, the printed circuit board in 3D

    BL706 Robot

    tomrodinger/line_following_robot

    The code for the line following robot that runs on BL702/BL706

    85 partsApache-2.0
  • 2 layers99 × 57.5 mmBL706 Robot, the printed circuit board in 3D

    BL706 Robot

    tomrodinger/line_following_robot

    The code for the line following robot that runs on BL702/BL706

    103 partsApache-2.0

Parts like it

8

Questions

Is there a KiCad symbol and footprint for the ZM4728A?

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

What package is the ZM4728A?

LL-41, with 2 pins. Its footprint is drawn on this page.

Where is the ZM4728A datasheet?

STMicroelectronics publishes it: the Datasheet link on this page opens it.

Where can I order the ZM4728A?

JLCPCB lists it as part C38989, with 0 in stock; the sellers' links on this page open their listings.

What can replace the ZM4728A?

Parts like it in the library: the ZM4728A by Slkor, the ZM4728A-TD by TDSEMIC, the ZM4728A by Zhengxin and the ZM4728A-GS08 by Vishay Intertechnology. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the ZM4728A?

4 boards in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.