IL420-X009T
Vishay Semiconductor Opto Division
Needs validationlow risk
A potential pin-compatible upgrade with higher voltage ratings and improved trigger sensitivity in the same 6-SMD package.
Best Alternatives to MOC3023S-TA1
The MOC3023S-TA1 is a random-phase triac driver optocoupler in a 6-SMD package. When searching for replacements, prioritize parts with the same package, no zero-crossing circuit, and an LED trigger current of 5mA or less.
AI replacement insight
Package risklow
Many alternatives exist in the same 6-SMD package.
Electrical riskhigh
Must match random-phase function and ensure trigger current is compatible.
Sourcing risklow
This is a common component type with multiple vendors.
Can it be replaced directly?
Direct replacement for MOC3023S-TA1 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Upgrade to a higher-specification part like the Vishay IL420 series, which offers better voltage ratings and sensitivity.
Main risk
The primary risk is accidentally selecting a part with a zero-crossing circuit (e.g., IL410 series), which is functionally incompatible with the random-phase target.
Recommended alternatives
1Alternative comparison matrix
| Feature / factor | MOC3023S-TA1 | IL420-X009T | IL420-X017 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 6-SMD | 6-SMD | 6-SMD | 6-SMD — Package appears to match.; IL420-X017: Package appears to match. | |
| Voltage | 5000 Vrms | 5300 Vrms | 5300 Vrms | 5300 Vrms — Higher isolation voltage.; IL420-X017: Higher isolation voltage. | |
| Current | 5 mA | 2 mA | unknown | 2 mA / unknown — Lower trigger current (higher sensitivity) is generally favorable.; IL420-X017: Trigger current not in summary; family datasheet suggests 2mA. | |
| Temperature | -40°C to +100°C | -55°C to +100°C | - | -55°C to +100°C — Wider operating temperature range. |
Application & sourcing insights
Questions & answers
Verified drop-in options for MOC3023S-TA1 are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.