APT1211SX

Overview

The Panasonic APT1211SX is a zero-crossing phototriac coupler designed for AC load switching. It features a triac output with a maximum off-state voltage of 600 V and an RMS on-state current of 50 mA. The device provides 3750 Vrms isolation between input and output channels. Key electrical parameters include a forward voltage of 1.21 V, a maximum turn-on time of 100 µs, and a minimum static dV/dt of 500 V/µs. It operates within a temperature range of -40°C to 100°C and is housed in a 4-SOP surface-mount package.

Feature Summary

• Zero-crossing switching capability minimizes electromagnetic interference during AC load activation.
• High isolation voltage of 3750 Vrms ensures safety between control and load circuits.
• Surface-mount 4-SOP packaging facilitates automated PCB assembly processes.

Applications

• AC load switching in industrial control systems
• Solid-state relay modules for consumer appliances
• Motor speed control circuits requiring low noise operation

Procurement Notes

Verify the specific suffix 'SX' corresponds to the tape-and-reel or cut-tape packaging format required for your assembly line. Confirm that the 4-SOP footprint matches your board design constraints. Ensure compliance with RoHS3 standards if applicable to your manufacturing region. Cross-reference the manufacturer part number with distributor codes to avoid variant mismatches.

Selection Notes

Select this component when zero-cross detection is critical to reduce electrical noise in AC applications. The 600 V rating suits standard mains voltage loads. Consider the 50 mA RMS current limit for appropriate load sizing. The SOP-4 package is suitable for space-constrained designs compared to through-hole alternatives like the DIP version.

Part Context

The APT1211SX belongs to the Panasonic APT series of phototriac couplers. This series is engineered for reliable AC switching with integrated zero-crossing logic. The SX designation typically indicates surface-mount packaging variants within the broader APT family, offering compatibility with modern SMT production lines while maintaining high isolation performance.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation. Verify pinout compatibility and electrical ratings before considering alternative manufacturers. Check datasheet specifications for equivalent isolation voltages and current handling capabilities.

FAQ

What is the maximum off-state voltage rating?

The maximum off-state output voltage (VDRM) is rated at 600 V.

Does this device support zero-crossing switching?

Yes, the APT1211SX includes an internal zero-cross circuit to minimize switching noise.