ZMM 3V9 Zener Diode – 3.9V 0.5W Voltage Regulator (LL34 SMD)

Product Description:
The ZMM 3V9 Zener Diode is a precision 3.9V, 0.5W voltage regulation device designed for compact and reliable overvoltage protection in modern electronic circuits. Housed in a LL34 (SOD-80) glass MELF package, this diode offers excellent thermal stability, low leakage, and strong protection performance in space-constrained designs.

With a maximum Zener impedance of 20Ω at 5mA and a tight ±5% voltage tolerance, it provides consistent and accurate voltage clamping across varying load conditions. Its low reverse leakage current (100nA) enhances power efficiency, making it suitable for battery-powered and high-density electronic applications.

The ZMM 3V9 is ideal for voltage reference circuits, surge suppression, power management systems, and general-purpose electronics, ensuring stable and dependable operation from −55°C to +150°C.

Key Specifications:

• Zener Voltage (Vz): 3.9V

• Power Rating: 0.5W

• Package: LL34 (SOD-80) Glass MELF

• Voltage Tolerance: ±5%

• Zener Impedance: Max 20Ω @ 5mA

• Reverse Leakage Current: 100nA @ Vz

• Operating Temperature: −55°C to +150°C

• Weight: 0.05g

Features:

• Precise 3.9V voltage regulation

• 0.5W power dissipation

• Compact LL34 MELF package for high-density PCBs

• Low reverse leakage for improved efficiency

• Tight voltage tolerance for stable operation

• Wide temperature range and robust construction

• Ideal for automated SMT assembly

• Reliable for voltage reference and surge suppression

Applications:

• Voltage regulation and stabilization

• Overvoltage protection

• Voltage reference circuits

• Surge suppression

• Consumer and industrial electronics

• Compact and portable devices

Package Includes:
1 × ZMM 3V9 0.5W Zener Diode (LL34 – SOD-80)

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