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MMSZ5243BT1 from ON,ON Semiconductor

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MMSZ5243BT1

Manufacturer: ON, MOTO

Plastic surface mount zener diode 500 milliwatts

Partnumber Manufacturer Quantity Availability
MMSZ5243BT1 ON, MOTO 6519 In Stock

Description and Introduction

Plastic surface mount zener diode 500 milliwatts # Introduction to the MMSZ5243BT1 Zener Diode  

The **MMSZ5243BT1** is a surface-mount Zener diode designed for voltage regulation and protection in electronic circuits. As part of the **SOD-123** package family, it offers a compact footprint, making it suitable for space-constrained applications such as consumer electronics, automotive systems, and industrial controls.  

This diode features a **5.6V nominal Zener voltage (Vz)** with a tight tolerance, ensuring stable performance in voltage clamping and reference applications. Its **500mW power dissipation** capability allows it to handle moderate power levels, while its low leakage current enhances efficiency in precision circuits.  

Key characteristics of the MMSZ5243BT1 include:  
- **Zener Voltage (Vz):** 5.6V (typical)  
- **Power Dissipation (Pd):** 500mW  
- **Package Type:** SOD-123 (small outline diode)  
- **Operating Temperature Range:** -65°C to +150°C  

The diode’s fast response time makes it effective in transient voltage suppression (TVS) applications, protecting sensitive components from voltage spikes. Additionally, its robust construction ensures reliability in harsh environments, including automotive and industrial settings.  

Engineers often utilize the MMSZ5243BT1 in power supplies, signal conditioning circuits, and overvoltage protection modules. Its combination of precision, compactness, and durability makes it a versatile choice for modern electronic designs.  

For optimal performance, designers should consider thermal management and ensure proper current limiting to prevent excessive power dissipation. When integrated correctly, the MMSZ5243BT1 provides reliable voltage regulation and circuit protection.

Application Scenarios & Design Considerations

Plastic surface mount zener diode 500 milliwatts

Alternative Part Number

  • BZT52C13 --: 13V zener in SOD-123 with similar power rating, widely available and a common cross for MMSZ5243B.
  • 1N4743A --: 13V 1W zener in DO-41 axial package; electrically equivalent but different package, suitable where board space allows.
  • MMSZ5243B --: Same 13V zener specification in SOD-123 from an alternate vendor, drop-in compatible with the original footprint.

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