MM3Z51VB

Single Zener Diodes Overview

The MM3Z51VB is a silicon planar Zener diode from the MM3Z2V4B-MM3Z75VB series, manufactured by onsemi. It provides voltage regulation with a nominal breakdown voltage of 51 V and a tight tolerance of ±2%. The device operates in a SOD-323FL surface-mount package with a steady-state power dissipation rating of 200 mW at 25°C. Key electrical parameters include a maximum dynamic impedance (ZZT) of 169 Ω at an test current (IZT) of 2 mA, and a reverse leakage current (IR) of 0.045 µA at a reverse voltage (VR) of 35.7 V. The component features a matte tin finish and is lead-free.

Single Zener Diodes Feature Summary

• Offers high precision voltage regulation with a standard ±2% tolerance on the nominal Zener voltage.
• Utilizes a very small and thin SMD package suitable for space-constrained designs.
• Constructed with a void-free, transfer-molded plastic case that is corrosion resistant.
• Features a matte tin finish and is compliant with lead-free manufacturing standards.

Single Zener Diodes Applications

• Voltage regulation protection circuits
• Cellular phones
• Handheld portable devices
• High density PC boards

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix to confirm the shipping configuration, as the datasheet indicates availability in tape and reel formats. Ensure the procurement matches the exact part number MM3Z51VB to guarantee the correct ±2% tolerance variant. Confirm compliance requirements such as RoHS and Pb-Free status if necessary for your assembly process. Cross-reference the marking code 'Z' on the component body to validate authenticity upon receipt.

Single Zener Diodes Selection Notes

Select this component when a precise 51 V reference or clamp is required in a compact footprint. The ±2% tolerance makes it suitable for applications demanding tighter voltage accuracy than standard Zener diodes. Consider the 200 mW power rating and thermal resistance of 595 °C/W for heat dissipation planning. The SOD-323FL package is ideal for automated surface mount assembly processes where board real estate is limited.

Single Zener Diodes Part Context

This device belongs to the MM3Z2V4B-MM3Z75VB series of Zener Voltage Regulators designed for surface mount applications. The series covers a wide voltage range from 2.4 V to 75 V, allowing designers to select specific breakdown voltages while maintaining consistent mechanical and electrical characteristics across the portfolio. The 'B' suffix denotes the ±2% tolerance class within this family.

Single Zener Diodes Replacement Considerations

Direct substitutes within the same series include other MM3ZxxxB variants with different voltage ratings but identical package and tolerance specifications. For equivalent performance in terms of voltage and tolerance, verify cross-references from other manufacturers offering 51 V Zener diodes in SOD-323 packages with ±2% tolerance and similar power dissipation ratings.