MCT2E Equivalent & Substitute Parts

Part Overview

The MCT2E is an optoisolator transistor with base output manufactured by onsemi, featuring 5300Vrms isolation voltage in a 6-DIP through-hole package. This component provides galvanic isolation for single-channel DC input applications with transistor output capability. The MCT2E is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across isolation voltage, output characteristics, and package form factor while meeting current product availability and compliance standards.

Substiute Parts

MCT2E

onsemiIn Stock: 1440MCT2E Datasheet

Current PartRFQ

MCT2EM

onsemiIn Stock: 3886MCT2EM Datasheet

DirectRFQ

4N25-000E

Broadcom LimitedIn Stock: 30614N25-000E Datasheet

SimilarRFQ

MCT2EX

Isocom Components 2004 LTDIn Stock: 1834MCT2EX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MCT2E is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Package / Case: 6-DIP (0.300", 7.62mm) through-hole mounting
• Number of Channels: 1
• Output Type: Transistor with Base
• Voltage - Output (Max): 30V minimum
• Input Type: DC

Acceptable Variation Parameters:

• Voltage - Isolation: Equal to or greater than 5300Vrms
• Current Transfer Ratio (Min): Equal to or greater than 20% @ 10mA
• Current - Output / Channel: Equal to or greater than 50mA
• Vce Saturation (Max): Equal to or less than 400mV
• Operating Temperature: Must encompass -55°C minimum and 100°C maximum

Three substitute parts meet these criteria with varying isolation voltage ratings and performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

MCT2EM (onsemi) - Direct Manufacturer Alternative

MCT2EM is the primary substitute for MCT2E, manufactured by the same supplier. It provides higher isolation voltage (7500Vpk) while maintaining identical output voltage and current specifications. MCT2EM is ROHS3 compliant and carries active product status. The operating temperature range is -40°C to 100°C, which covers the upper portion of the MCT2E range. This part is suitable for applications where the reduced lower temperature limit (-40°C versus -55°C) is acceptable.

MCT2EX (Isocom Components) - Equivalent Isolation Voltage

MCT2EX matches the MCT2E isolation voltage (5300Vrms) and operating temperature range (-55°C ~ 100°C). It offers superior current transfer ratio (50% @ 10mA versus 20%), providing better signal integrity. MCT2EX is ROHS3 compliant with active product status. Output current specification is not provided in available data. This part is suitable for applications requiring the full temperature range and improved transfer ratio performance.

4N25-000E (Broadcom Limited) - Lower Isolation Voltage Alternative

4N25-000E provides lower isolation voltage (2500Vrms) compared to MCT2E (5300Vrms) and is suitable only for applications where reduced isolation voltage is acceptable. It offers higher output current capability (100mA versus 50mA) and maintains the full operating temperature range (-55°C ~ 100°C). Vce saturation is higher (500mV versus 400mV). This part is ROHS3 compliant with active product status. Selection requires confirmation that 2500Vrms isolation meets application requirements.

Frequently Asked Questions (FAQ)

Q: Can MCT2EM replace MCT2E directly in existing designs?

A: MCT2EM is pin-compatible and functionally equivalent for most applications. The primary difference is operating temperature range: MCT2EM operates from -40°C to 100°C, while MCT2E operates from -55°C to 100°C. If your application requires operation below -40°C, MCT2EM is not suitable. MCT2EM provides higher isolation voltage (7500Vpk), which is a performance advantage.

Q: What is the key difference between MCT2EX and MCT2E?

A: MCT2EX maintains identical isolation voltage (5300Vrms) and operating temperature range (-55°C ~ 100°C) as MCT2E. The significant advantage is current transfer ratio: MCT2EX guarantees 50% @ 10mA compared to MCT2E's 20%, resulting in better signal fidelity and reduced input current requirements. Output current specification for MCT2EX is not documented.

Q: Is 4N25-000E suitable as a substitute for MCT2E?

A: 4N25-000E is compatible only if your application can tolerate reduced isolation voltage (2500Vrms versus 5300Vrms). It offers higher output current (100mA versus 50mA) and maintains the full operating temperature range. Vce saturation is slightly higher (500mV versus 400mV). Isolation voltage reduction must be verified against application safety and regulatory requirements.

Q: Are all substitute parts available in the same 6-DIP package?

A: Yes. MCT2EM, MCT2EX, and 4N25-000E are all packaged in 6-DIP (0.300", 7.62mm) through-hole format, ensuring mechanical and electrical pin compatibility with MCT2E.

Q: Which substitute part has the best compliance status?

A: All three substitute parts (MCT2EM, MCT2EX, and 4N25-000E) are ROHS3 compliant and carry REACH Unaffected status. All are classified as active products, ensuring long-term availability compared to the obsolete MCT2E.

Q: What is the impact of different isolation voltage ratings on circuit design?

A: Isolation voltage determines the maximum voltage differential that can be safely applied across the optoisolator. MCT2EM (7500Vpk) and MCT2EX (5300Vrms) both meet or exceed MCT2E specifications. 4N25-000E (2500Vrms) provides lower isolation and is suitable only for lower-voltage applications. Selection must align with your circuit's maximum isolation voltage requirement.