MMBZ5250C-HE3-18

Single Zener Diodes Overview

The MMBZ5250C-HE3-18 is a single Zener diode manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 20 V with a tight tolerance of ±2%. The device is designed for surface mount installation in an SOT-23-3 package. It has a maximum power dissipation of 225 mW and a maximum Zener impedance of 25 Ohms. The reverse leakage current is specified at 100 nA when measured at 15 V. The component operates within a temperature range of -55°C to +150°C.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation with a nominal Zener voltage of 20 V and a tight ±2% tolerance.
• Designed for surface mount applications using the compact SOT-23-3 package.
• Capable of handling a maximum power dissipation of 225 mW.
• Operates reliably across an extended temperature range from -55°C to +150°C.

Single Zener Diodes Applications

• Voltage reference circuits requiring stable 20 V levels
• Overvoltage protection in low-power electronic systems
• Clamping applications in signal conditioning paths

Single Zener Diodes Procurement Notes

This specific part number, MMBZ5250C-HE3-18, is officially listed as obsolete and no longer manufactured by Vishay. Verification of current availability should focus on identifying approved substitute components or checking remaining stock from authorized distributors. Ensure that any replacement part maintains the required electrical specifications, such as the 20 V Zener voltage and ±2% tolerance, to guarantee circuit compatibility.

Single Zener Diodes Selection Notes

Select this component when a precise 20 V reference is needed in a small form factor. The ±2% tolerance makes it suitable for applications demanding higher accuracy than standard 5% variants. Consider the 225 mW power rating to ensure adequate thermal headroom. Verify that the SOT-23-3 footprint matches the PCB design constraints before finalizing the selection.

Single Zener Diodes Part Context

The MMBZ5250C-HE3-18 belongs to the MMBZ5250 series of Zener diodes from Vishay. This series typically includes variants with different tolerances and packaging options. The 'C' suffix often denotes the tighter ±2% tolerance, while 'HE3' indicates Halogen-free and RoHS-compliant construction. The '-18' suffix usually refers to the reel packaging format.

Single Zener Diodes Replacement Considerations

Publicly confirmed direct substitutes include CZRT5250B-G from Comchip Technology. Other potential replacements may exist within the same family or from other manufacturers, but verification of pinout and electrical parameters is essential.

Single Zener Diodes FAQ

What is the Zener voltage tolerance for the MMBZ5250C-HE3-18?

The MMBZ5250C-HE3-18 has a Zener voltage tolerance of ±2%.

Is the MMBZ5250C-HE3-18 still in production?

No, the MMBZ5250C-HE3-18 is obsolete and no longer manufactured.

What is the maximum operating temperature for this diode?

The maximum operating temperature for the MMBZ5250C-HE3-18 is +150°C.