AL1G

Overview

The AL1G is a standard avalanche SMD rectifier diode from Diotec Semiconductor, rated for a maximum average forward current of 1 A at 75°C. It features a repetitive peak reverse voltage of 400 V and a non-repetitive peak reverse avalanche energy of 20 mJ. The device supports a half-sine-wave peak forward surge current of 30 A at 60 Hz. Operating junction temperature ranges from -50 to +175°C, with storage temperatures matching this range.

Feature Summary

• Standard avalanche capability providing protection against transient overvoltage events
• High thermal stability allowing operation up to 175°C junction temperature
• Low leakage current characteristics ensuring minimal power loss in reverse bias

Applications

• General-purpose rectification in industrial electronics
• Power supply output stages requiring avalanche robustness
• Consumer electronic devices needing reliable AC-to-DC conversion

Procurement Notes

Verify the specific package type and marking code before ordering, as surface mount variants may differ from through-hole equivalents. Confirm compliance with RoHS and ELV directives if required by your manufacturing standards. Ensure that the PCB copper pad area meets the specified 25 mm² per terminal requirement to maintain the rated 1 A current capacity without exceeding thermal limits.

Selection Notes

Select the AL1G when a 400 V blocking voltage is necessary alongside a 1 A continuous current rating. Consider its avalanche energy rating if the circuit is prone to inductive kickback or voltage spikes. Compare its typical reverse recovery time of 1500 ns against faster alternatives if high-frequency switching performance is critical for the application design.

Part Context

The AL1G belongs to the AL1A...AL1M series of standard avalanche SMD rectifiers. This family provides various voltage ratings from 100 V to 1000 V while maintaining a consistent 1 A forward current capability. The series is designed for compact surface-mount applications where space constraints and reliability are primary engineering concerns.

Replacement Considerations

Cross-reference with other manufacturers' 1 A, 400 V SMD rectifiers such as those in the SMA or SMB packages. Verify that any substitute component matches the 400 V reverse voltage and 1 A forward current ratings. Check if the alternative offers similar avalanche energy handling capabilities if transient protection is required.