LL34 SMD Zener Diode 500mW 18V
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Prices updated: 13 Oct 2026
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About this product
A surface-mount Zener diode in the LL34 package, rated for 500 mW with an 18 V Zener voltage. Its cylindrical glass body is used for voltage regulation, reference and overvoltage clamping in compact boards. Keep the dissipation within the 500 mW rating using an appropriate series resistor.
Specifications
- Zener voltage
- 18V / 18 فولت
- Power rating
- 500mW / 500 ملي وات
- Package
- LL34 (glass MELF) / LL34 (زجاجي أسطواني)
- Mounting
- Surface-mount (SMD) / تركيب سطحي (SMD)
Frequently asked questions
How is LL34 different from SOT-23 Zener diodes?
LL34 is a cylindrical glass package, while SOT-23 is a three-pin plastic package. Their footprints are not interchangeable, so match the pad layout to the package.
How do I stay within the 500mW rating?
Use a series resistor sized for your supply voltage and the current the circuit needs, then check that the power dissipated in the diode stays below 500 mW.