MID400S

Overview

The MID400S is a single-channel logic output optocoupler designed for AC line monitoring applications. It features an open collector transistor output and provides electrical isolation between AC input and digital logic circuits. Key electrical parameters include a maximum continuous output current of 20 mA, a forward current rating of 30 mA, and a typical forward voltage of 1.5 V. The device offers an insulation voltage of 2500 Vrms and operates within a temperature range of -40°C to +85°C. Power dissipation is rated at 115 mW, with typical propagation delays of 1 ms for both low-to-high and high-to-low transitions.

Feature Summary

• Provides galvanic isolation for AC line monitoring and time delay switching applications
• Integrates an open collector transistor output compatible with standard logic families
• Designed for robust performance in industrial environments with wide operating temperature range

Applications

• AC line monitoring circuits
• Time delay isolation switches
• Industrial control systems requiring AC-to-logic interface

Procurement Notes

Verify component authenticity through authorized onsemi distributors or certified suppliers. Confirm the specific suffix (e.g., S, SDV) matches the required package type, as variants exist. Check for End-of-Life (EOL) status or Product Change Notifications (PCN) prior to procurement, as availability may be limited. Ensure compliance with RoHS directives if required by the target application specifications.

Selection Notes

Select the MID400S when AC line monitoring with logic-level output is required. Choose this part over general-purpose optocouplers due to its specialized AC input characteristics and integrated open-collector output. Consider the 2500 Vrms isolation rating for safety-critical interfaces. Evaluate the 1 ms propagation delay against system timing requirements. Compare package options such as PDIP or SMD based on PCB layout constraints.

Part Context

The MID400S belongs to the MID400 series of optocouplers from onsemi. This series is specifically engineered for AC line monitoring tasks, distinguishing it from general-purpose digital isolators. The component serves as a bridge between high-voltage AC lines and low-voltage digital logic, ensuring signal integrity while maintaining electrical safety isolation in power management and control applications.

Replacement Considerations

The MID400SDVM is listed as a potential replacement or related variant. Verify pinout compatibility and electrical specifications before substitution. Note that some sources indicate the base MID400S model may be obsolete; confirm current production status with the manufacturer.