MCT2W Optoisolator - Equivalent & Substitute Parts

Part Overview

The MCT2W is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications requiring 5300Vrms isolation rating. This component features a single-channel configuration in a 6-DIP package and is classified as obsolete. Due to its obsolete status, identifying functionally compatible substitute parts is essential for design continuity and procurement planning.

Substiute Parts

MCT2W

onsemiIn Stock: 933MCT2W Datasheet

Current PartRFQ

MCT2G

Isocom Components 2004 LTDIn Stock: 2377MCT2G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MCT2W is determined by the following critical parameters:

• Package Compatibility: 6-DIP (0.400", 10.16mm) form factor for direct pin-compatible replacement
• Channel Configuration: Single-channel optoisolator architecture
• Output Stage: Transistor with base output topology
• Isolation Voltage: Minimum 5300Vrms isolation rating
• Current Transfer Ratio: Minimum 20% @ 10mA
• Maximum Output Voltage: 30V capability
• Output Current: 50mA per channel minimum
• Saturation Voltage: 400mV maximum Vce saturation
• Operating Temperature Range: -55°C ~ 100°C
• Input Type: DC input configuration

The MCT2G from Isocom Components 2004 LTD qualifies as a substitute based on matching package, channel count, output type, and core electrical parameters within acceptable tolerances.

Parameter Comparison

Engineering Selection Recommendations

The MCT2G represents a viable substitute for the obsolete MCT2W based on the following factors:

• Package Compatibility: Both components use identical 6-DIP (0.400", 10.16mm) packaging, enabling direct mechanical and electrical pin replacement without PCB redesign.
• Functional Equivalence: Matching single-channel configuration, transistor-with-base output topology, and DC input type preserve circuit functionality.
• Electrical Parameters: Identical current transfer ratio minimum (20% @ 10mA), maximum output voltage (30V), and saturation voltage (400mV) ensure compatible performance in existing designs.
• Temperature Range: Identical operating temperature range (-55°C ~ 100°C) maintains thermal performance specifications.
• Product Status: The MCT2G is active and in production, providing long-term availability and supply chain stability compared to the obsolete MCT2W.
• Compliance: The MCT2G carries ROHS3 compliance certification, meeting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the MCT2G directly replace the MCT2W without circuit modifications?

A: Yes, the MCT2G provides direct pin-compatible replacement in the 6-DIP package. Both components share identical current transfer ratio, output voltage, and saturation voltage specifications, enabling drop-in substitution without circuit redesign.

Q: What is the significance of the isolation voltage difference between MCT2W (5300Vrms) and MCT2G (7.5Vpk)?

A: The isolation voltage specifications are expressed in different units (Vrms versus Vpk). The MCT2W specifies 5300Vrms isolation, while the MCT2G specifies 7.5Vpk isolation. These represent different measurement standards for isolation rating and should be evaluated against your specific isolation requirements.

Q: Is the MCT2G suitable for applications originally designed for the MCT2W?

A: The MCT2G matches all critical electrical parameters provided for the MCT2W, including current transfer ratio, output voltage capability, saturation voltage, and operating temperature range. Substitution is appropriate for applications within these specified parameters.

Q: What is the advantage of using MCT2G over MCT2W?

A: The MCT2G is an active product in current production, ensuring reliable long-term availability and supply chain continuity. The MCT2W is obsolete and subject to inventory depletion. The MCT2G also carries ROHS3 compliance certification.

Q: Are there any packaging or mounting differences between these components?

A: No. Both the MCT2W and MCT2G use identical 6-DIP (0.400", 10.16mm) through-hole packaging, ensuring mechanical compatibility on existing PCBs without modification.

Q: What parameters should be verified when substituting the MCT2G for the MCT2W?

A: Verify that your application operates within the following shared specifications: current transfer ratio minimum of 20% @ 10mA, maximum output voltage of 30V, maximum Vce saturation of 400mV, and operating temperature range of -55°C ~ 100°C.