MCT2EFR2VM Equivalent & Substitute Parts

Part Overview

The MCT2EFR2VM is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications requiring 7500Vpk isolation rating. This component features a single-channel transistor output configuration in a 6-SMD surface mount package. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	MCT2EFR2VM
Manufacturer	onsemi
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	7500Vpk
Current Transfer Ratio (Min)	20% @ 10mA
Output Type	Transistor with Base
Voltage - Output (Max)	30V
Current - Output / Channel	50mA
Mounting Type	Surface Mount
Package / Case	6-SMD, Gull Wing
Operating Temperature	-40°C ~ 100°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MCT2EFR2VM is determined by the following critical parameters:

Parametric Equivalent Classification: Parts meeting all of the following criteria qualify as parametric equivalents:

Voltage - Isolation: 7500Vpk (exact match required)
Number of Channels: 1 (exact match required)
Output Type: Transistor with Base (exact match required)
Current Transfer Ratio (Min): 20% @ 10mA (exact match required)
Voltage - Output (Max): 30V (exact match required)
Current - Output / Channel: 50mA (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: 6-SMD, Gull Wing (exact match required)

Similar Part Classification: Parts that share the base product number (MCT2) and core functional characteristics (optoisolator transistor with base output) but deviate in one or more critical parameters are classified as similar alternatives. These parts may require design review and validation before implementation.

Parameter Comparison

Parameter	MCT2EFR2VM (Main)	MCT2ESR2VM (Parametric Equivalent)	MCT2EX (Similar)
Manufacturer	onsemi	Fairchild Semiconductor	Isocom Components 2004 LTD
Product Status	Obsolete	Active	Active
Number of Channels	1	1	1
Voltage - Isolation	7500Vpk	7500Vpk	5300Vrms
Current Transfer Ratio (Min)	20% @ 10mA	20% @ 10mA	50% @ 10mA
Turn On / Turn Off Time (Typ)	2µs, 2µs	2µs, 2µs	3µs, 3µs
Output Type	Transistor with Base	Transistor with Base	Transistor with Base
Voltage - Output (Max)	30V	30V	30V
Current - Output / Channel	50mA	50mA	Not specified
Voltage - Forward (Vf) (Typ)	1.25V	1.25V	1.2V
Current - DC Forward (If) (Max)	60mA	60mA	60mA
Vce Saturation (Max)	400mV	400mV	400mV
Operating Temperature	-40°C ~ 100°C	-40°C ~ 100°C	-55°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Through Hole
Package / Case	6-SMD, Gull Wing	6-SMD, Gull Wing	6-DIP (0.300", 7.62mm)
ECCN	EAR99	EAR99	EAR99

Engineering Selection Recommendations

MCT2ESR2VM (Parametric Equivalent - Recommended): This Fairchild Semiconductor part is classified as a parametric equivalent and maintains all critical electrical and mechanical specifications of the MCT2EFR2VM. The MCT2ESR2VM carries active product status, ensuring ongoing availability and manufacturing support. This part is suitable for direct substitution in applications currently using the MCT2EFR2VM without design modification.

MCT2EX (Similar Alternative - Design Review Required): The Isocom Components MCT2EX shares the MCT2 base product family and transistor-with-base output architecture but introduces the following deviations: isolation voltage is specified as 5300Vrms (versus 7500Vpk), current transfer ratio minimum is 50% @ 10mA (versus 20%), switching times are 3µs (versus 2µs), and the package is 6-DIP through-hole (versus 6-SMD surface mount). This part is classified as a similar alternative and requires design validation to confirm compatibility with the target application's isolation voltage and switching speed requirements. The through-hole package necessitates PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can MCT2ESR2VM be used as a direct replacement for MCT2EFR2VM?

A: Yes. The MCT2ESR2VM is a parametric equivalent with identical electrical specifications and package configuration. No design changes are required for substitution.

Q: What are the key differences between MCT2EFR2VM and MCT2EX?

A: The MCT2EX differs in three critical areas: (1) isolation voltage is 5300Vrms instead of 7500Vpk, (2) current transfer ratio is 50% @ 10mA instead of 20%, and (3) the package is 6-DIP through-hole instead of 6-SMD surface mount. These differences require application-level compatibility assessment.

Q: Is the MCT2EX suitable for applications requiring 7500Vpk isolation?

A: No. The MCT2EX isolation rating of 5300Vrms is lower than the MCT2EFR2VM specification of 7500Vpk. Use of this part in applications requiring the higher isolation voltage is not supported.

Q: What is the impact of switching time differences between MCT2EFR2VM and MCT2EX?

A: The MCT2EX has turn-on and turn-off times of 3µs compared to 2µs for the MCT2EFR2VM. Applications with timing-critical requirements must verify that the slower switching speed of the MCT2EX is acceptable for the target circuit.

Q: Can MCT2EX be used in surface mount applications?

A: No. The MCT2EX is packaged as 6-DIP through-hole, whereas the MCT2EFR2VM uses 6-SMD surface mount. PCB redesign is required to accommodate the different package type.

Q: What is the availability status of substitute parts?

A: MCT2ESR2VM is classified as active product status with 19027 units in stock. MCT2EX is also active with 1750 units in stock. The original MCT2EFR2VM is obsolete with 717 units remaining in inventory.

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