1N5245B

Single Zener Diodes Overview

The 1N5245B is a silicon unidirectional Zener voltage regulator diode manufactured by SMC Diode Solutions. It features a nominal breakdown voltage of 15 V with a tolerance range of 14.25 V to 15.75 V, corresponding to a ±5% precision. The device is rated for a maximum power dissipation of 0.5 W (500 mW) and operates within a junction temperature range of -65 °C to 200 °C. It utilizes a glass axial-lead DO-35 (DO-204AH) package with two terminals. Key electrical characteristics include a knee impedance of up to 600 Ω and a reverse leakage current of 100 nA at 11 V.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a single-element silicon Zener structure.
• Encapsulated in a hermetically sealed glass axial-lead package for environmental protection.
• Designed for unidirectional voltage clamping and reference applications.

Single Zener Diodes Applications

• Voltage regulation in low-power electronic circuits
• Overvoltage protection for sensitive components
• Reference voltage generation in analog signal processing

Single Zener Diodes Procurement Notes

Verify the manufacturer designation on the component body, as SMC Diode Solutions produces this part alongside other vendors like Motorola/NXP and Microsemi. Confirm the package code matches DO-35 or DO-204AH specifications. Ensure the tolerance class aligns with the required circuit precision, noting that military variants may carry different prefixes. Cross-reference datasheets from all potential suppliers to confirm identical electrical limits before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 15 V regulated voltage is required in a compact axial-lead form factor. The 0.5 W power rating suits low-current applications where thermal management is limited. Verify that the operating environment stays within the specified -65 °C to 200 °C junction temperature range. Consider the ±5% tolerance if tighter voltage accuracy is not critical for the specific design requirements.

Single Zener Diodes Part Context

The 1N5245B belongs to the widely used 1N5221 through 1N5281B series of 0.5 W Zener diodes. This series offers a broad selection of voltages from 2.4 V to 200 V in standard 5% or 10% tolerances. Manufactured by SMC Diode Solutions, these devices are available in various screening levels, including military specifications, making them suitable for both commercial and ruggedized electronic systems requiring reliable voltage regulation.

Single Zener Diodes Replacement Considerations

Compatible substitutes include MSP1N5245B from Microsemi, which shares the 15 V specification but uses a DO-7 hermetic glass package. Other generic 1N5245B parts from different manufacturers may be interchangeable if they meet the same DO-35 package and 0.5 W power dissipation criteria. Always verify pinout compatibility and exact tolerance ratings before substitution.