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MMBZ5242B from MOTO,Motorola

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MMBZ5242B

Manufacturer: MOTO, PHILIPS, FAIRCHILD

Surface nount zener diode. 350 mW. Nominal zen. Vltg @ Izt Vz 12.0 V. Test current 20.0 mA.

Partnumber Manufacturer Quantity Availability
MMBZ5242B MOTO, PHILIPS, FAIRCHILD 118245 In Stock

Description and Introduction

Surface nount zener diode. 350 mW. Nominal zen. Vltg @ Izt Vz 12.0 V. Test current 20.0 mA. # Introduction to the MMBZ5242B Zener Diode  

The **MMBZ5242B** 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 portable devices, power supplies, and communication systems.  

This component features a **12V nominal Zener voltage** with a tolerance of **±5%**, ensuring stable voltage clamping for precision applications. With a **500mW power dissipation** rating, it provides reliable overvoltage protection while maintaining efficiency in low-power circuits. The MMBZ5242B exhibits a low dynamic impedance, contributing to improved voltage regulation under varying load conditions.  

Key characteristics of the MMBZ5242B include a **leakage current below 0.1µA** at voltages below the breakdown threshold, enhancing energy efficiency. Its fast response time makes it effective in transient voltage suppression (TVS) applications, safeguarding sensitive components from voltage spikes.  

Engineers often integrate the MMBZ5242B in **voltage reference circuits, power management systems, and ESD protection networks**. Its compatibility with automated PCB assembly processes further enhances its usability in high-volume manufacturing.  

For optimal performance, designers should consider thermal management and ensure operating conditions remain within the specified **-55°C to +150°C** temperature range. With its balance of precision, reliability, and compact design, the MMBZ5242B serves as a versatile solution for modern electronic designs requiring stable voltage regulation.

Application Scenarios & Design Considerations

Surface nount zener diode. 350 mW. Nominal zen. Vltg @ Izt Vz 12.0 V. Test current 20.0 mA.

Alternative Part Number

  • BZX84C12 --: 12V zener in SOT-23 with similar tolerance and power rating, widely available and pin-compatible.
  • MMSZ5242B --: Same 12V zener voltage and SOT-23 package from a major supplier, direct functional equivalent.
  • 1N4742A --: 12V 1W zener diode offering higher power margin, suitable replacement when board space allows through-hole or adapted footprint.
  • BZT52C12 --: 12V zener in SOT-23 with similar power rating and characteristics; widely available alternative from a different series and manufacturer.

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