1SMA4755H

Single Zener Diodes Overview

The 1SMA4755H is a surface-mount Zener diode manufactured by Taiwan Semiconductor in the SMA (DO-214AC) package. It provides voltage regulation with a nominal Zener voltage of 39V and a power dissipation rating of 1W at 75°C ambient temperature. The device features a glass-passivated junction for reliability and meets AEC-Q101 automotive qualification standards. Key electrical characteristics include a maximum reverse leakage current of 5µA at 12V and a test current of 6mA. The component operates within a junction temperature range of -55°C to +150°C and supports peak forward surge currents typical for this package class.

Single Zener Diodes Feature Summary

• Glass-passivated junction ensures long-term stability and environmental resistance
• Automotive-grade AEC-Q101 qualification for high-reliability applications
• Surface-mount SMA (DO-214AC) package optimized for automated placement

Single Zener Diodes Applications

• Voltage regulation in automotive electronic control units
• Clamping circuits in industrial protection systems
• Reference voltage sources in precision measurement equipment

Single Zener Diodes Procurement Notes

Verify the specific suffix 'H' confirms AEC-Q101 automotive qualification status as defined by the manufacturer. Confirm RoHS compliance and halogen-free status against the latest datasheet revision. Ensure ordering quantities align with reel packaging specifications provided by the supplier. Cross-reference the part number with official distributor catalogs to validate authenticity and traceability before procurement.

Single Zener Diodes Selection Notes

Select this component when an SMA footprint is required for space-constrained designs needing 39V regulation. Consider the 1W power derating curve if operating above 75°C ambient temperature. Verify that the 5µA leakage specification meets circuit sensitivity requirements. Ensure compatibility with standard reflow soldering profiles for DO-214AC packages during assembly.

Single Zener Diodes Part Context

This part belongs to the 1SMA series of silicon Zener diodes from Taiwan Semiconductor, designed for general-purpose voltage regulation and clamping. The series utilizes a glass-passivated p-n junction structure housed in the compact SMA package. It serves as a surface-mount alternative to axial leaded equivalents like the 1N47xx series, offering improved mechanical stability and suitability for high-volume automated manufacturing processes.

Single Zener Diodes Replacement Considerations

Direct substitutes include other manufacturers' 1SMA4755 variants with identical pinout and electrical ratings. Verify that replacement parts maintain the same AEC-Q101 qualification if automotive use is required. Check for equivalent thermal resistance and package dimensions to ensure board compatibility without redesign.