MID400SDM

Overview

The MID400SDM is a single-channel optically isolated AC line monitor device manufactured by onsemi. It provides electrical isolation between AC mains and logic circuits, featuring a 2500Vrms isolation voltage rating. The component is housed in an 8-SMD surface-mount package. Designed for monitoring AC line voltage status, it interfaces directly with digital logic systems while maintaining safety barriers against high-voltage transients.

Feature Summary

• Provides galvanic isolation between AC power lines and low-voltage logic circuits
• Monitors AC line voltage presence and status for system control
• Utilizes optical coupling to ensure signal transmission without electrical connection

Applications

• AC line presence detection in electronic equipment
• Logic interface for AC-powered devices requiring isolation
• Power supply monitoring circuits

Procurement Notes

Verify the specific suffix 'SDM' corresponds to the 8-SMD tape-and-reel packaging configuration. Confirm the isolation voltage rating of 2500Vrms matches application requirements. Ensure the manufacturer is identified as onsemi or its predecessor Fairchild Semiconductor for authenticity. Check current lifecycle status to confirm availability for production.

Selection Notes

Select this component when AC line monitoring requires robust electrical isolation from sensitive logic inputs. The surface-mount package suits automated assembly processes. Consider the single-channel architecture for simple presence detection tasks. Verify that the operating temperature range and isolation specifications meet the environmental constraints of the target design.

Part Context

This device belongs to the MID400 series of AC line monitor optocouplers. It serves as a bridge between high-voltage AC domains and low-voltage digital logic. Similar variants exist in DIP packages, such as the MID400M, offering different mounting options for the same functional isolation capabilities.

Replacement Considerations

The MID400M is a documented pin-compatible alternative in an 8-lead plastic DIP package. Verify package footprint differences if transitioning between SMD and DIP formats. Ensure isolation ratings remain consistent across substitutes.