MID400

Overview

The MID400 is an optically isolated AC line-to-logic interface device manufactured by onsemi. It features a single channel with an open collector output type, designed for monitoring AC line voltage. The component utilizes two back-to-back GaAs LED diodes for input isolation and provides a logic-compatible output signal. It operates within a temperature range of -40°C to +85°C and offers an insulation voltage of 2500 Vrms. Key electrical parameters include a maximum continuous output current of 20 mA, a forward current of 30 mA, and a forward voltage of 1.5 V. The device is housed in an 8-lead plastic DIP package.

Feature Summary

• Optically isolated AC line-to-logic interface
• Integrated back-to-back GaAs LED input structure
• Open collector logic output configuration

Applications

• AC line voltage monitoring circuits
• Logic interface for AC power systems
• Electrical isolation in AC detection applications

Procurement Notes

Verify the specific suffix variant required for your application, as packaging and certification options vary across the MID400 family. Confirm RoHS compliance status and check for end-of-life notifications or product change notices prior to finalizing procurement plans. Ensure the selected package style matches your board layout requirements.

Selection Notes

Select this component when designing circuits requiring direct AC line monitoring with galvanic isolation. Consider the 2500 Vrms insulation rating for safety-critical interfaces. Evaluate the open collector output capability against your downstream logic voltage levels. Verify that the 8-DIP package fits your assembly constraints and thermal management needs.

Part Context

The MID400 belongs to the MID400 series of logic output optocouplers from onsemi. It is categorized under special purpose isolators and AC monitor-to-logic devices. This part serves as a dedicated solution for interfacing high-voltage AC lines with low-voltage digital logic systems, providing reliable optical isolation.

Replacement Considerations

Public confirmed substitute part numbers include MID400WV, MID400TVM, MID400SDVM, and MID400W. Verify pinout compatibility and electrical specifications before substitution.