
MMSZ5249B
onsemiExtended
1 Independent 100nA@14V 18.05V~19.95V 19V 23Ω 500mW 600Ω ±5% SOD-123 Zener Diodes ROHS
- Part id
- onsemi/MMSZ5249B
- Category
- Zener Diodes
- Package
- SOD-123
- Pins
- 2
- In stock
- 0 at JLCPCB (C3733678)
- Used on
- 1 open-source board
Overview
The MMSZ5249B is a zener Diode made by onsemi in a SOD-123 package with 2 pins. 1 Independent 100nA@14V 18.05V~19.95V 19V 23Ω 500mW 600Ω ±5% 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. JLCPCB lists it (part C3733678). 1 open-source board in 1 repository on GitHub use it.
Symbol
Footprint
Pinout
2| Pin | Name | Type |
|---|---|---|
| 1 | K | Passive |
| 2 | A | Passive |
Open-source boards using it
1- 4 layers160 × 100 mm

Parts like it
8SZMMSZ5249B
SOD-1231 Independent 100nA@14V 18.05V~19.95V 19V 23Ω 500mW SOD-123 Zener Diodes ROHSonsemiZener DiodesMMSZ4706-E3-08
SOD-1231 Independent 18.1V~20V 19V 500mW 50nA@14.4V ±5% SOD-123 Zener Diodes ROHSVishay IntertechnologyZener DiodesMMSZ4706-E3-18
SOD-123Zener DiodesVishay IntertechnologyMMSZ4706-G3-18
SOD-1231 Independent 18.1V~20V 19V 500mW 50nA@14.4V ±5% SOD-123 Zener Diodes ROHSVishay IntertechnologyZener DiodesMMSZ4706-HE3_A-08
SOD-123Zener DiodesVishay IntertechnologyMMSZ4706-HE3_A-18
SOD-123Zener DiodesVishay IntertechnologyMMSZ5249B-E3-18
SOD-123-55℃~+150℃ 1 Independent 100nA@14V 19V 23Ω 500mW 600Ω ±5% SOD-123 Zener Diodes ROHSVishay IntertechnologyZener DiodesMMSZ5249B-HE3-08
SOD-123-55℃~+150℃ 1 Independent 100nA@14V 19V 23Ω 500mW 600Ω ±5% SOD-123 Zener Diodes ROHSVishay IntertechnologyZener Diodes
Questions
Is there a KiCad symbol and footprint for the MMSZ5249B?
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 MMSZ5249B?
SOD-123, with 2 pins. Its footprint is drawn on this page.
Where is the MMSZ5249B datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the MMSZ5249B?
JLCPCB lists it as part C3733678, with 0 in stock; the sellers' links on this page open their listings.
What can replace the MMSZ5249B?
Parts like it in the library: the SZMMSZ5249B by onsemi, the MMSZ4706-E3-08 by Vishay Intertechnology, the MMSZ4706-E3-18 by Vishay Intertechnology and the MMSZ4706-G3-18 by Vishay Intertechnology. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the MMSZ5249B?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.