1N5257BUR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N5257BUR-1/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 33 V. It operates within a junction temperature range of -65 °C to +175 °C and dissipates up to 0.5 W. The device features a metallurgically bonded glass DO-213AA (MELF) package, offering hermetic sealing. Electrical characteristics include a maximum reverse leakage current of 700 µA at the rated voltage and a dynamic impedance of 58 Ω at the test current of 3.8 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed metallurgically bonded glass surface mount package
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge
• Minimal capacitance for high-frequency stability

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage sources in precision circuits
• Protection against overvoltage transients

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required tolerance level and RoHS compliance status. Confirm the presence of the TR suffix indicates tape and reel packaging per EIA-481-B standards. Ensure the component version aligns with the intended commercial or screened reliability requirements before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for space-constrained designs. The 33 V rating suits applications needing stable reference voltages in moderate power environments. Consider the low capacitance characteristic for signal integrity in sensitive analog paths where minimal loading is critical.

Single Zener Diodes Part Context

This part belongs to the 1N5221BUR-1 through 1N5281BUR-1 series, providing surface mount equivalents to the JEDEC registered axial-leaded 1N5221 to 1N5281 series. The series covers a wide voltage range from 2.4 V to 200 V, allowing designers to standardize on a single package type across various voltage regulation needs.

Single Zener Diodes Replacement Considerations

Direct replacements include other manufacturers' DO-213AA MELF Zener diodes with matching 33 V ratings and 0.5 W power dissipation. Verify pinout polarity and thermal resistance specifications to ensure compatibility with existing board layouts and heat dissipation capabilities.