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MMSZ4685 from MOTO,Motorola

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MMSZ4685

Manufacturer: MOTO, DIODES

Zener Diode

Partnumber Manufacturer Quantity Availability
MMSZ4685 MOTO, DIODES 6450 In Stock

Description and Introduction

Zener Diode # Introduction to the MMSZ4685 Zener Diode  

The MMSZ4685 is a surface-mount Zener diode designed for voltage regulation and protection in electronic circuits. As part of the MMSZ series, it offers precise voltage stabilization with a nominal Zener voltage of 5.1V, making it suitable for applications requiring reliable overvoltage protection or reference voltage generation.  

Constructed in a compact SOD-123 package, the MMSZ4685 is ideal for space-constrained designs while maintaining efficient power dissipation. With a power rating of 500mW, it provides sufficient handling capability for low-power circuits, such as signal conditioning, power supply regulation, and transient voltage suppression.  

Key features of the MMSZ4685 include a sharp breakdown characteristic, low leakage current, and stable performance across a wide temperature range. Its small form factor and compatibility with automated assembly processes make it a practical choice for modern PCB designs.  

Common applications include voltage clamping in communication interfaces, microcontroller I/O protection, and DC-DC converter stabilization. Engineers often select the MMSZ4685 for its balance of precision, reliability, and cost-effectiveness in consumer electronics, industrial controls, and automotive systems.  

When integrating the MMSZ4685 into a circuit, proper consideration of power dissipation and thermal management ensures optimal performance and longevity. Its standardized footprint and industry-wide availability further enhance its usability in diverse electronic designs.

Application Scenarios & Design Considerations

Zener Diode

Alternative Part Number

  • BZT52C6V2 --: 6.2V zener in SOD-123 package, same as MMSZ4685, widely available and pin-compatible.
  • 1N4735A --: 6.2V 1W zener diode, electrically similar and a common through-hole alternative when layout allows.
  • MMSZ5234B --: 6.2V zener in SOD-123, same package style and voltage class, good drop-in substitute.
  • BZT52C3V6 --: Zener diode in the SOD-123 package with a similar 3.6V nominal voltage, widely available and a common drop-in substitute for MMSZ-series zeners.
  • 1N4728A --: 3.3V 1W zener diode in DO-41 axial package; electrically close and a classic alternative when through-hole mounting is acceptable.
  • MMSZ5226B --: 3.3V zener in the same SOD-123 surface-mount package from a different manufacturer, offering a direct footprint-compatible replacement.

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