1N5256B-TR

Single Zener Diodes Overview

The Vishay 1N5256B-TR is a silicon planar power Zener diode in the DO-35 (DO-204AH) axial leaded package. It provides a nominal Zener voltage of 30 V with a standard tolerance of ±5%. The device dissipates up to 500 mW at thermal equilibrium and operates within a junction temperature range of -65 °C to +175 °C. Electrical characteristics include a maximum reverse leakage current of 100 nA at 23 V, a dynamic resistance of 49 Ω at a test current of 4.2 mA, and a typical voltage temperature coefficient of 0.091 %/K.

Single Zener Diodes Feature Summary

• Utilizes silicon planar technology for stable voltage regulation
• Features a glass-encapsulated DO-35 axial leaded package
• Includes cathode band marking for polarity identification

Single Zener Diodes Applications

• Voltage stabilization circuits
• Reference voltage generation
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify that the ordering code includes the TR suffix to confirm tape-and-reel packaging rather than cut tape or ammopack formats. Ensure the B suffix is present to match the specified ±5% voltage tolerance. Cross-reference the document number 85588 to access the latest electrical parameters and mechanical dimensions before finalizing procurement specifications.

Single Zener Diodes Selection Notes

Select this component when a 30 V reference point is required in through-hole designs. The 500 mW power rating supports moderate current loads without excessive heat sinking. Verify that the operating environment remains within the specified -65 °C to +175 °C junction temperature limits to maintain performance stability.

Single Zener Diodes Part Context

This part belongs to the 1N5221 to 1N5267 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series covers a wide Zener voltage range from 2.4 V to 75 V. The 1N5256B-TR specifically addresses applications requiring a 30 V breakdown voltage with standard commercial-grade tolerances.

Single Zener Diodes Replacement Considerations

Equivalent devices are available in MiniMELF (TZM5256), SOT-23 (MMBZ5256), and SOD-123 (MMSZ5256) packages. These alternatives offer identical electrical characteristics but require different footprint layouts and soldering profiles.