MCT2SM Equivalent & Substitute Parts

Part Overview

The MCT2SM is an optoisolator transistor with base output manufactured by onsemi, designed for 7500Vpk isolation applications in 6-SMD surface mount packaging. This component provides galvanic isolation with a single transistor output channel, suitable for DC input signal isolation in industrial and consumer electronics applications.

The MCT2SM is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this optoisolator topology.

Substiute Parts

MCT2SM

onsemiIn Stock: 5176MCT2SM Datasheet

Current PartRFQ

MCT2ESM

Fairchild SemiconductorIn Stock: 5374MCT2ESM Datasheet

Parametric EquivalentRFQ

MCT2SM

onsemiIn Stock: 5176MCT2SM Datasheet

SimilarRFQ

MCT2SMT&R

Isocom Components 2004 LTDIn Stock: 994MCT2SMT&R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MCT2SM is determined by the following critical parameters:

• Voltage - Isolation rating of 7500Vpk minimum
• Single channel configuration with transistor output and base connection
• Current Transfer Ratio minimum of 20% @ 10mA
• Maximum output voltage of 30V
• Output current capability of 50mA per channel
• 6-SMD, Gull Wing surface mount package
• Operating temperature range encompassing -40°C to 100°C

Parts meeting these specifications across all critical parameters are classified as parametric equivalents. Parts with minor deviations in non-critical parameters (such as turn-on/turn-off time or forward voltage) while maintaining core isolation, output, and packaging requirements are classified as similar alternatives.

Parameter Comparison

Engineering Selection Recommendations

MCT2ESM (Fairchild Semiconductor) is the primary parametric equivalent for MCT2SM replacement. This part maintains identical electrical specifications across all critical parameters including isolation voltage, output characteristics, switching times, and operating temperature range. MCT2ESM carries Active product status, ensuring ongoing availability and supply chain support. Both parts share identical REACH and ECCN compliance classifications.

MCT2SMT&R (Isocom Components 2004 LTD) is not suitable as a direct substitute due to a critical isolation voltage specification of 7.5Vpk, which falls significantly below the required 7500Vpk isolation rating of the MCT2SM. This represents a 1000-fold reduction in isolation capability and introduces unacceptable risk in applications requiring the specified isolation voltage. Additionally, MCT2SMT&R does not specify output current per channel, creating uncertainty in load-driving capability.

For applications requiring MCT2SM replacement, MCT2ESM is the recommended equivalent part, offering full parametric compatibility with active product status and established supply availability.

Frequently Asked Questions (FAQ)

Q: Can MCT2SMT&R be used as a substitute for MCT2SM?

A: No. MCT2SMT&R specifies an isolation voltage of 7.5Vpk, which is 1000 times lower than the MCT2SM requirement of 7500Vpk. This part does not meet the isolation voltage specification and is not suitable for applications designed around MCT2SM.

Q: What is the primary advantage of MCT2ESM over MCT2SM?

A: MCT2ESM maintains identical electrical and mechanical specifications to MCT2SM while carrying Active product status. This ensures continued manufacturing, supply chain availability, and technical support, addressing the obsolescence of the original MCT2SM.

Q: Are there packaging differences between MCT2SM and MCT2ESM?

A: Both MCT2SM and MCT2ESM use identical 6-SMD, Gull Wing surface mount packaging. No PCB layout or assembly process modifications are required for substitution.

Q: Do compliance certifications differ between MCT2SM and MCT2ESM?

A: No. Both parts share identical REACH Unaffected status and EAR99 ECCN classification, ensuring equivalent regulatory compliance for export and application use.

Q: What is the operating temperature range difference between MCT2SM and MCT2SMT&R?

A: MCT2SM operates from -40°C to 100°C, while MCT2SMT&R extends the lower limit to -55°C. However, this advantage is negated by the critical isolation voltage deficiency of MCT2SMT&R, making it unsuitable for MCT2SM replacement regardless of temperature range.