STTH1R04AY

Single Diodes Overview

The STTH1R04AY is an ultrafast recovery rectifier diode manufactured by STMicroelectronics, designed for high-voltage applications. It features a peak reverse repetitive voltage (Vrrm) of 400 V and a maximum continuous forward current (If) of 1 A. The device exhibits a typical peak reverse recovery time (trr) of 14 ns and a maximum forward voltage (Vf) of 1.6 V at rated current. Packaged in the SMA surface-mount format (DO-214AC), it supports a junction temperature range from -40°C to +150°C and withstands a peak non-repetitive forward surge current (Ifsm) of 30 A.

Single Diodes Feature Summary

• Ultrafast recovery characteristics with 14 ns typical reverse recovery time for efficient switching
• AEC-Q101 qualified for automotive reliability and stability under harsh conditions
• Planar technology ensures low leakage current and high thermal performance
• Surface-mount SMA package design for automated assembly and compact layouts

Single Diodes Applications

• Protection against surges defined in ISO 7637-2 for automotive circuits
• Protection against electrostatic discharges according to ISO 10605
• High-frequency rectification in power supply modules
• Free-wheeling diodes in DC-DC converters

Single Diodes Procurement Notes

Verify the specific suffix 'AY' corresponds to the AEC-Q101 qualified automotive grade variant, distinct from standard industrial grades like 'U'. Confirm the SMA package footprint matches IPC-7531 standards during PCB layout. Ensure sourcing channels provide original manufacturer documentation to validate the component's authenticity and traceability for automotive compliance requirements.

Single Diodes Selection Notes

Select this component when automotive qualification (AEC-Q101) and ultrafast switching speeds are required. The 400 V rating suits medium-voltage DC systems. Compare the 14 ns trr against slower alternatives if switching losses are critical. Verify that the 1 A current rating meets the circuit's continuous load requirements and that the SMA package fits the available board space constraints.

Single Diodes Part Context

This device belongs to the STTH1R04 series of fast and ultrafast recovery diodes from STMicroelectronics. The 'AY' suffix specifically denotes the automotive-grade version compliant with AEC-Q101 standards. It shares the core electrical architecture with other variants in the family but offers enhanced reliability specifications suitable for demanding automotive environments compared to general-purpose industrial counterparts.

Single Diodes Replacement Considerations

Direct substitutes must match the 400 V Vrrm, 1 A If, and SMA package. Verify if the alternative part holds AEC-Q101 certification if automotive use is intended. Check for equivalent or better ultrafast recovery times (trr) and forward voltage drops to ensure no performance degradation in the existing circuit design.