APT1221SZ

Overview

The Panasonic Electric Works APT1221SZ is a single-channel Triac output optocoupler designed for high-voltage isolation applications. It features a 3750 Vrms isolation voltage and supports a maximum continuous output current of 50 mA. The device operates within a temperature range of -40°C to +100°C and includes a 600 V off-state voltage rating. Packaged in a compact 4-SMD Gull Wing form factor, it utilizes a standard DIP-4 equivalent footprint for surface mount installation.

Feature Summary

• Provides robust electrical isolation between control circuits and high-power loads via a Triac output stage
• Optimized for direct triggering of external Triacs in AC switching applications without zero-crossing circuitry
• Designed for surface mount integration with a compact 4-SMD Gull Wing package configuration

Applications

• Industrial control systems requiring isolated AC load switching
• Solid state relay (SSR) internal isolation stages
• Consumer electronics AC power management circuits

Procurement Notes

Verify the specific suffix designation against official Panasonic documentation to confirm isolation voltage ratings, as variants exist with differing specifications. Confirm package type accuracy, as some listings may reference DIP formats while this model specifies SMD. Check RoHS compliance status and recent Product Change Notifications before finalizing procurement orders.

Selection Notes

Select this component when surface mount technology is required for AC isolation tasks. Ensure the design accommodates the 50 mA continuous output limit and 600 V blocking voltage. Verify that the absence of zero-crossing detection aligns with the application's noise immunity requirements compared to alternative models.

Part Context

This part belongs to the APT series of phototriac couplers manufactured by Panasonic Electric Works. The series provides various packaging options including through-hole and surface mount configurations. The APT1221SZ specifically addresses modern assembly needs with its SMD footprint while maintaining the electrical characteristics typical of the broader APT family.

Replacement Considerations

APT1221AX is listed as an alternative variant from Panasonic Industry.