MCT2EFM Equivalent & Substitute Parts

Part Overview

The MCT2EFM is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications. This component provides 7500Vpk isolation voltage with a single channel transistor output configuration in a 6-SMD surface mount package. The MCT2EFM is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

MCT2EFM

onsemiIn Stock: 880MCT2EFM Datasheet

Current PartRFQ

MCT2ESM

Fairchild SemiconductorIn Stock: 5374MCT2ESM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MCT2EFM are identified based on strict electrical and mechanical parameter equivalence. The following parameters define substitution eligibility:

• Voltage - Isolation: 7500Vpk (exact match required)
• Number of Channels: 1 (single channel configuration)
• Output Type: Transistor with Base (functional output topology)
• Current Transfer Ratio (Min): 20% @ 10mA (minimum performance threshold)
• Turn On / Turn Off Time (Typ): 2µs, 2µs (switching speed specification)
• Rise / Fall Time (Typ): 2µs, 1.5µs (signal transition characteristics)
• Voltage - Output (Max): 30V (maximum output voltage rating)
• Current - Output / Channel: 50mA (output current capacity)
• Vce Saturation (Max): 400mV (saturation voltage specification)
• Operating Temperature: -40°C ~ 100°C (thermal operating range)
• Package / Case: 6-SMD, Gull Wing (physical form factor and pinout compatibility)
• Input Type: DC (input signal type)

The MCT2ESM meets all specified electrical and mechanical parameters and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The MCT2EFM is classified as obsolete. The MCT2ESM manufactured by Fairchild Semiconductor is an active product with identical electrical specifications and mechanical packaging. Both components share the same base product number (MCT2) and are functionally equivalent across all specified parameters.

Selection between these parts should be based on procurement availability and supply chain considerations. The MCT2ESM, being an active product, offers superior long-term availability and supply continuity compared to the obsolete MCT2EFM. Both components comply with REACH regulations and carry EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can MCT2ESM directly replace MCT2EFM in existing designs? A: Yes. The MCT2ESM meets all electrical and mechanical specifications of the MCT2EFM, including isolation voltage, switching characteristics, output ratings, and package configuration. Direct substitution is supported without circuit modification.

Q: Are there differences in isolation voltage between these parts? A: No. Both the MCT2EFM and MCT2ESM provide 7500Vpk isolation voltage, meeting identical high-voltage isolation requirements.

Q: Do these parts have the same package footprint? A: Yes. Both components use 6-SMD, Gull Wing surface mount packaging with identical pinout and physical dimensions, enabling direct PCB layout compatibility.

Q: What is the significance of the obsolete status of MCT2EFM? A: Obsolete status indicates the MCT2EFM is no longer manufactured or supported by onsemi. The MCT2ESM, classified as active, represents the recommended alternative for new procurement and ongoing supply assurance.

Q: Are switching speed characteristics identical? A: Yes. Both parts specify identical turn-on/turn-off times of 2µs and 2µs, and rise/fall times of 2µs and 1.5µs, ensuring equivalent performance in switching applications.

Q: Do both parts operate across the same temperature range? A: Yes. Both the MCT2EFM and MCT2ESM operate across -40°C to 100°C, supporting identical thermal operating requirements.