MID400 Optoisolator AC Line Monitor Equivalent & Substitute Parts

Part Overview

The MID400 is an optoisolator AC line monitor with 2500Vrms isolation, designed for single-channel AC/DC input applications requiring galvanic isolation. This component features an open collector output with 20mA maximum output current and operates across the industrial temperature range of -40°C to 85°C. The MID400 is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support.

Substiute Parts

MID400

onsemiIn Stock: 3639MID400 Datasheet

Current PartRFQ

MID400M

onsemiIn Stock: 8466MID400M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MID400 is determined by strict equivalence across the following critical parameters:

• Single-channel AC line monitor functionality
• 2500Vrms isolation voltage rating
• AC/DC input type capability
• 20mA output current per channel
• 1ms maximum propagation delay (typical)
• 1.5V typical forward voltage
• 30mA maximum DC forward current
• 7V supply voltage
• -40°C to 85°C operating temperature range
• Through-hole mounting in 8-DIP package format
• ROHS3 compliance and UR approval

The MID400M meets all these criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The MID400M is the direct equivalent for the obsolete MID400. Both parts maintain identical electrical and mechanical specifications across all critical parameters. The MID400M carries active product status from onsemi, ensuring continued availability and manufacturing support. Both components meet ROHS3 compliance requirements and carry UR approval certification. The MID400M is supplied in tube packaging with MSL rating of 1 (unlimited moisture sensitivity), providing standard handling conditions for through-hole components. Selection of the MID400M eliminates obsolescence risk while maintaining full functional and physical compatibility with existing MID400 designs.

Frequently Asked Questions (FAQ)

Q: Can MID400M be used as a direct replacement for MID400 in existing designs?

A: Yes. The MID400M is electrically and mechanically identical to the MID400 across all specified parameters, including isolation voltage, output current, propagation delay, supply voltage, and operating temperature range. Both components use the same 8-DIP through-hole package format.

Q: What is the primary advantage of switching from MID400 to MID400M?

A: The MID400M has active product status, ensuring ongoing manufacturing availability and supply chain continuity. The MID400 is obsolete and subject to inventory depletion.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the MID400 and MID400M are ROHS3 compliant and carry UR approval. Compliance certifications are identical.

Q: Does the packaging difference affect component performance?

A: No. The MID400M is supplied in tube packaging, which is standard for through-hole components. This affects only handling and storage procedures, not electrical or mechanical performance.

Q: What is the moisture sensitivity level (MSL) difference, and does it matter?

A: The MID400M has an MSL rating of 1 (unlimited), which is standard for through-hole components and indicates no special moisture control requirements during storage or handling. The MID400 lists MSL as not applicable. This difference does not affect component functionality or compatibility.