MID400SM

Overview

The MID400SM is an optically isolated AC line-to-logic interface device manufactured by onsemi. It features a single channel with logic output, designed for monitoring AC line voltage. The component utilizes surface-mount technology in an 8-SMD package. Key electrical specifications include a maximum forward voltage of 1.5V and a maximum input current of 60mA. It provides an isolation voltage of 2500Vrms. The device operates within a temperature range of -40°C to 85°C and complies with RoHS standards.

Feature Summary

• Provides optical isolation between AC line voltage and logic circuits
• Monitors AC line status for system control applications
• Features logic output compatible with standard digital interfaces

Applications

• AC line monitoring in power supply systems
• Zero-crossing detection for phase control circuits
• Isolated feedback in industrial automation equipment

Procurement Notes

Verify the specific suffix SM indicates surface mount packaging distinct from DIP variants. Confirm RoHS compliance status for environmental regulations. Ensure the 2500Vrms isolation rating meets safety requirements for the target application voltage class. Cross-reference datasheet revisions for any changes in pinout or thermal characteristics before finalizing design integration.

Selection Notes

Select this component when AC line monitoring requires galvanic isolation from low-voltage logic circuits. Consider the 8-SMD package for PCB space constraints compared to through-hole options. Evaluate the 60mA input current capability against the driving circuit's output strength. Verify that the operating temperature range aligns with the environmental conditions of the end-use product.

Part Context

The MID400SM belongs to the MID400M series of optocouplers designed for AC line monitoring. It serves as a specialized isolator bridging high-voltage AC domains and low-voltage digital logic. This family addresses safety and noise immunity needs in power electronics. The surface-mount variant facilitates automated assembly processes while maintaining performance parity with its DIP counterparts.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.