MCT2FM Equivalent & Substitute Parts

Part Overview

The MCT2FM is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications requiring 7500Vpk isolation rating. This component integrates a photodiode input stage with a transistor output stage including base connection, enabling flexible circuit design in isolated switching and signal transmission applications.

The MCT2FM is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

MCT2FM

onsemiIn Stock: 1235MCT2FM Datasheet

Current PartRFQ

MCT2ESM

Fairchild SemiconductorIn Stock: 5374MCT2ESM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MCT2FM are identified based on strict parametric equivalence across the following critical specifications:

• Isolation Voltage: 7500Vpk minimum
• Number of Channels: 1 channel configuration
• Output Stage Type: Transistor with Base output
• Current Transfer Ratio: Minimum 20% @ 10mA
• Maximum Output Voltage: 30V
• Maximum Output Current: 50mA per channel
• Operating Temperature Range: -40°C to 100°C
• Mounting Technology: Surface Mount
• Package Configuration: 6-SMD, Gull Wing

The MCT2ESM manufactured by Fairchild Semiconductor meets all specified parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The MCT2ESM from Fairchild Semiconductor is the qualified substitute for the obsolete MCT2FM. Both components demonstrate identical electrical and mechanical specifications across all critical parameters. The MCT2ESM maintains active product status, ensuring ongoing availability and supply chain support.

Selection of the MCT2ESM provides the following advantages:

• Full parametric compatibility with the MCT2FM across isolation voltage, output characteristics, and timing specifications
• Active product status supporting long-term supply chain continuity
• Identical package configuration (6-SMD, Gull Wing) enabling direct PCB layout compatibility
• Compliance with ECCN EAR99 and HTSUS 8541.49.8000 classifications matching the original component

Frequently Asked Questions (FAQ)

Q: Can the MCT2ESM be used as a direct replacement for the MCT2FM in existing designs?

A: Yes. The MCT2ESM meets all electrical and mechanical specifications of the MCT2FM. Both components feature identical isolation voltage (7500Vpk), output current capability (50mA), output voltage rating (30V), timing characteristics, and 6-SMD Gull Wing packaging. Direct substitution is supported without circuit modification.

Q: What is the primary reason for seeking a substitute for the MCT2FM?

A: The MCT2FM is classified as obsolete. The MCT2ESM provides equivalent functionality with active product status, ensuring reliable supply availability for new production and maintenance applications.

Q: Are there any package or pinout differences between these components?

A: No. Both the MCT2FM and MCT2ESM utilize identical 6-SMD Gull Wing packaging. Pinout configuration and PCB footprint requirements are equivalent, supporting direct board-level substitution.

Q: What isolation voltage rating do these components provide?

A: Both components provide 7500Vpk isolation voltage, meeting high-voltage isolation requirements in industrial control, power conversion, and signal transmission applications.

Q: Are there compliance or certification differences between the MCT2FM and MCT2ESM?

A: Both components share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications. Compliance profiles are equivalent for export and regulatory purposes.