MCT2ESR2M Equivalent & Substitute Parts

Part Overview

The MCT2ESR2M is an optoisolator transistor with base output manufactured by onsemi, featuring 7500Vpk isolation voltage and single-channel configuration in 6-SMD surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part delivers 1 channel of galvanic isolation with transistor output including base connection, suitable for applications requiring high-voltage isolation with moderate switching speeds.

Key Parameters

Parameter	Value
Isolation Voltage	7500Vpk
Number of Channels	1
Output Type	Transistor with Base
Current Transfer Ratio (Min)	20% @ 10mA
Turn On / Turn Off Time	2µs, 2µs
Maximum Output Voltage	30V
Maximum Output Current	50mA
Operating Temperature Range	-40°C ~ 100°C
Package Type	6-SMD, Gull Wing
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the MCT2ESR2M is determined by the following critical parameters: isolation voltage rating, number of channels, output type (transistor with base), maximum output voltage, maximum output current per channel, and surface mount package compatibility. Parts meeting these core electrical and mechanical specifications are classified as direct or similar substitutes.

Direct Substitutes maintain identical or equivalent electrical performance across all specified parameters, including isolation voltage, switching characteristics, and output ratings.

Similar Substitutes share the same functional topology and package form factor but may exhibit variations in secondary parameters such as current transfer ratio, switching speed, or temperature range, provided these variations do not compromise circuit functionality.

Parameter Comparison

Parameter	MCT2ESR2M (Main)	MCT2ESR2VM (Direct)	MCT2ESM (Similar)	MCT2ESMT&R (Similar)
Manufacturer	onsemi	Fairchild Semiconductor	Fairchild Semiconductor	Isocom Components 2004 LTD
Product Status	Obsolete	Active	Active	Active
Isolation Voltage	7500Vpk	7500Vpk	7500Vpk	7.5Vpk
Number of Channels	1	1	1	1
Output Type	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base
Current Transfer Ratio (Min)	20% @ 10mA	20% @ 10mA	20% @ 10mA	50% @ 10mA
Turn On / Turn Off Time	2µs, 2µs	2µs, 2µs	2µs, 2µs	3µs, 3µs
Maximum Output Voltage	30V	30V	30V	30V
Maximum Output Current	50mA	50mA	50mA	Not specified
Operating Temperature Range	-40°C ~ 100°C	-40°C ~ 100°C	-40°C ~ 100°C	-55°C ~ 100°C
Package / Case	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing	6-SMD, Gull Wing
Packaging Format	Bulk	Bulk	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

MCT2ESR2VM is the primary direct substitute, manufactured by Fairchild Semiconductor with active product status. This part maintains identical electrical specifications across isolation voltage, switching characteristics, output ratings, and temperature range. Active availability and equivalent performance make this the preferred replacement for MCT2ESR2M in new designs and production continuity.

MCT2ESM is a secondary direct substitute from Fairchild Semiconductor, also with active status and matching core electrical parameters. Availability and performance characteristics align with MCT2ESR2M requirements.

MCT2ESMT&R is a similar substitute from Isocom Components 2004 LTD supplied in Tape & Reel packaging format. This part exhibits a critical deviation: isolation voltage is specified as 7.5Vpk rather than 7500Vpk. This represents a significant reduction in isolation capability and is suitable only for applications where lower isolation voltage is acceptable. Additional variations include higher current transfer ratio (50% vs 20%), slower switching times (3µs vs 2µs), and extended temperature range (-55°C to 100°C). Selection of MCT2ESMT&R requires explicit verification that circuit isolation requirements can tolerate the reduced voltage rating.

Frequently Asked Questions (FAQ)

Q: Can MCT2ESR2VM be used as a direct replacement for MCT2ESR2M?

A: Yes. MCT2ESR2VM maintains identical electrical specifications including 7500Vpk isolation voltage, 20% minimum current transfer ratio, 2µs switching times, 30V maximum output voltage, and 50mA maximum output current. The 6-SMD Gull Wing package is mechanically compatible. Active product status ensures ongoing availability.

Q: What is the key difference between MCT2ESM and MCT2ESR2M?

A: MCT2ESM shares identical electrical specifications with MCT2ESR2M across all critical parameters: isolation voltage, channel count, output type, switching characteristics, and output ratings. Both are 6-SMD surface mount packages. The primary distinction is manufacturer (Fairchild Semiconductor vs onsemi) and active product status for MCT2ESM.

Q: Why is MCT2ESMT&R listed as a similar rather than direct substitute?

A: MCT2ESMT&R exhibits a critical parameter deviation: isolation voltage is 7.5Vpk compared to 7500Vpk for the main part. This represents a 1000-fold reduction in isolation capability. Additionally, current transfer ratio is higher (50% vs 20%), switching times are slower (3µs vs 2µs), and output current specification is not provided. These variations require circuit-level evaluation before selection.

Q: Are all substitute parts available in the same packaging format?

A: MCT2ESR2VM and MCT2ESM are supplied in bulk packaging. MCT2ESMT&R is supplied in Tape & Reel (TR) format, which may affect procurement and assembly processes. Packaging format selection depends on production volume and assembly equipment compatibility.

Q: What compliance certifications apply to these parts?

A: MCT2ESR2M, MCT2ESR2VM, and MCT2ESM carry REACH Unaffected status and EAR99 ECCN classification. MCT2ESMT&R is RoHS3 Compliant with REACH Unaffected status and EAR99 ECCN classification. All parts have Moisture Sensitivity Level 1 (Unlimited).

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