MID400S Equivalent & Substitute Parts

Part Overview

The MID400S is an optoisolator AC line monitor manufactured by onsemi, designed for 2500Vrms isolation applications in single-channel configurations. This component features an open collector output with 20mA per channel capability and operates across the -40°C to 85°C temperature range. The MID400S is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications. The substitute MID400SM provides functional continuity for designs currently utilizing the MID400S.

Substiute Parts

MID400S

onsemiIn Stock: 6049MID400S Datasheet

Current PartRFQ

MID400SM

onsemiIn Stock: 673MID400SM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MID400S is determined by strict equivalence across the following parameters:

• Isolation voltage: 2500Vrms
• Channel configuration: Single channel
• Output type: Open collector
• Output current per channel: 20mA
• Input capability: AC and DC
• Propagation delay: 1ms maximum (typical)
• Forward voltage: 1.5V typical
• Maximum forward current: 30mA
• Supply voltage: 7V
• Operating temperature range: -40°C to 85°C
• Package type: 8-SMD, Gull Wing
• Compliance: ROHS3, UR approval

The MID400SM meets all specified parameters identically to the MID400S, establishing direct functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The MID400SM is the direct active equivalent for the obsolete MID400S. Both components share identical electrical specifications, mechanical packaging, and regulatory compliance certifications. The MID400SM maintains ROHS3 compliance and UR approval, ensuring compatibility with current environmental and safety standards. Selection of the MID400SM for new designs or replacement applications eliminates obsolescence risk while preserving full functional equivalence with existing MID400S implementations.

Frequently Asked Questions (FAQ)

Q: Can MID400SM directly replace MID400S in existing designs? A: Yes. The MID400SM provides complete functional equivalence across all specified electrical parameters, isolation voltage, output current, propagation delay, and operating temperature range. The 8-SMD Gull Wing package is identical, enabling direct PCB-level substitution.

Q: What is the primary difference between MID400S and MID400SM? A: The MID400S is classified as obsolete, while the MID400SM is active. All electrical and mechanical specifications are identical. The MID400SM is the recommended active part for procurement.

Q: Are there any compliance differences between these parts? A: No. Both parts maintain ROHS3 compliance, UR approval, and identical moisture sensitivity levels. Regulatory and environmental compliance is equivalent.

Q: What packaging options are available? A: Both the MID400S and MID400SM are supplied in 8-SMD, Gull Wing surface mount packages in tube packaging. No alternative package configurations are specified for these part numbers.

Q: Is the MID400SM suitable for -40°C to 85°C operating environments? A: Yes. The MID400SM operates across the full -40°C to 85°C temperature range, matching the MID400S specification.