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MMSZ3V9T1 from ON,ON Semiconductor

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MMSZ3V9T1

Manufacturer: ON, MOTO

Zener Regulator

Partnumber Manufacturer Quantity Availability
MMSZ3V9T1 ON, MOTO 3815 In Stock

Description and Introduction

Zener Regulator # Introduction to the MMSZ3V9T1 Zener Diode  

The **MMSZ3V9T1** is a surface-mount Zener diode designed for voltage regulation and protection in electronic circuits. As part of the **MMSZ series**, this component offers a precise breakdown voltage of **3.9V**, making it suitable for applications requiring stable reference voltages or transient suppression.  

Constructed with a **SOD-123 package**, the MMSZ3V9T1 is compact and ideal for space-constrained PCB designs. Its low leakage current and sharp breakdown characteristics ensure reliable performance in voltage clamping and regulation tasks. With a power dissipation rating of **500mW**, it can handle moderate power levels while maintaining thermal stability.  

Common applications include:  
- **Voltage regulation** in low-power circuits  
- **Overvoltage protection** for sensitive components  
- **Signal clamping** in communication systems  
- **Power supply stabilization** in portable electronics  

The MMSZ3V9T1 operates efficiently within a temperature range of **-65°C to +150°C**, ensuring durability in various environmental conditions. Its fast response time makes it effective in suppressing voltage spikes, protecting downstream components from damage.  

Engineers favor this Zener diode for its consistency, small footprint, and cost-effectiveness, making it a practical choice for both prototyping and mass production. Whether used in consumer electronics, automotive systems, or industrial controls, the MMSZ3V9T1 provides dependable voltage regulation with minimal design complexity.  

For optimal performance, designers should consider proper heat dissipation and adhere to specified current limits to maximize the diode's lifespan and efficiency.

Application Scenarios & Design Considerations

Zener Regulator

Alternative Part Number

  • BZT52C3V9 --: 3.9V zener diode in SOD-123 package with similar power rating, direct functional replacement.
  • DDZ3V9 --: 3.9V zener in SOD-123, comparable tolerance and power dissipation, widely available.
  • MMSZ4686T1G --: Same manufacturer family, 3.9V zener in SOD-123, though different series naming for easy distinction.
  • 1N4728A --: 3.3V/3.9V-class 1W zener in DO-41 axial package; usable where through-hole mounting is acceptable and higher power margin is beneficial.

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