MMFT2406T1 N-Channel MOSFET 240V 700mA Equivalent & Substitute Parts

Part Overview

The MMFT2406T1 is an N-Channel MOSFET manufactured by onsemi, rated for 240V drain-to-source voltage with 700mA continuous drain current in a surface mount SOT-223 package. This device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The part operates as a general-purpose switching transistor suitable for low-power applications requiring moderate voltage ratings and current handling.

Substiute Parts

MMFT2406T1

onsemiIn Stock: 3334MMFT2406T1 Datasheet

Current PartRFQ

ZVN4424GTA

Diodes IncorporatedIn Stock: 13170ZVN4424GTA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMFT2406T1 is determined by strict alignment of electrical and mechanical parameters within the N-Channel MOSFET category. The primary substitution criteria are:

Electrical Compatibility Requirements:

• Drain-to-Source Voltage (Vdss) must equal or exceed 240V
• Continuous Drain Current (Id) must support the application's current demands
• On-state resistance (Rds On) must be compatible with switching performance requirements
• Gate threshold voltage (Vgs(th)) must fall within acceptable control voltage ranges
• Input capacitance (Ciss) affects switching speed and gate drive requirements

Mechanical Compatibility Requirements:

• Surface mount packaging in SOT-223 (TO-261) configuration
• Pin configuration compatible with TO-261-4 or TO-261AA footprints

Compliance Considerations:

• Product status (active vs. obsolete) affects long-term availability
• RoHS compliance status determines suitability for regulated applications
• Moisture sensitivity level (MSL) impacts storage and handling requirements

The ZVN4424GTA from Diodes Incorporated meets these substitution criteria through equivalent voltage rating, compatible package, and active product status.

Parameter Comparison

Engineering Selection Recommendations

MMFT2406T1 (onsemi) — Original Part: The MMFT2406T1 is obsolete and carries RoHS non-compliance status. Continued use is limited to legacy systems where component replacement is not feasible. The MSL rating of 3 requires controlled storage conditions (168-hour maximum floor life after moisture exposure). New designs should not incorporate this part.

ZVN4424GTA (Diodes Incorporated) — Primary Substitute: The ZVN4424GTA is the recommended substitute for new designs and production continuity. It maintains electrical equivalence through identical 240V Vdss rating and compatible on-state resistance characteristics. The part is active in production, ROHS3 compliant, and carries MSL-1 rating, eliminating moisture sensitivity constraints. The continuous drain current rating of 500mA is lower than the original 700mA specification; applications requiring the full 700mA rating must be re-evaluated for thermal and current-handling margins. The slightly higher input capacitance (200pF vs. 125pF) may require gate drive circuit adjustment in high-frequency switching applications.

Compliance Considerations: Selection of ZVN4424GTA aligns with modern RoHS3 compliance requirements and provides superior moisture handling characteristics through MSL-1 rating. Organizations transitioning from legacy systems should prioritize this substitute to achieve regulatory compliance and improve supply chain reliability.

Frequently Asked Questions (FAQ)

Q: Can the ZVN4424GTA directly replace the MMFT2406T1 in existing PCB layouts?

A: Yes. Both devices use identical TO-261-4 and TO-261AA package configurations with SOT-223 footprints. Pin-to-pin compatibility is maintained, allowing direct PCB substitution without layout modifications.

Q: What is the impact of the 200mA lower continuous drain current rating on the ZVN4424GTA?

A: The ZVN4424GTA is rated for 500mA continuous drain current versus the MMFT2406T1's 700mA. Applications operating at or near 700mA must be re-evaluated. Thermal analysis is required to confirm the substitute can handle the intended current load without exceeding junction temperature limits. If the application requires the full 700mA rating, alternative substitutes with higher current ratings must be identified.

Q: How does the higher input capacitance of the ZVN4424GTA affect circuit performance?

A: The ZVN4424GTA exhibits 200pF input capacitance compared to 125pF in the original part. This 60% increase affects gate charge and switching speed. In high-frequency switching applications (above 100kHz), gate drive circuits may require adjustment to maintain switching performance. Low-frequency applications (below 10kHz) are typically unaffected.

Q: Is the ZVN4424GTA suitable for new product designs?

A: Yes. The ZVN4424GTA is active in production with ROHS3 compliance and MSL-1 rating, making it suitable for new designs. The obsolete status of the MMFT2406T1 makes the ZVN4424GTA the appropriate choice for all new development.

Q: What are the storage and handling differences between these parts?

A: The MMFT2406T1 carries MSL-3 rating, limiting floor life to 168 hours after moisture exposure. The ZVN4424GTA carries MSL-1 rating with unlimited floor life, eliminating moisture sensitivity constraints and simplifying inventory management.

Q: Are there electrical performance differences in on-state resistance?

A: Both parts exhibit similar on-state resistance at 500mA and 10V gate voltage (6Ohm vs. 5.5Ohm). The ZVN4424GTA shows slightly lower resistance, providing marginally improved efficiency in switching applications. Gate threshold voltage is also comparable (2V vs. 1.8V), ensuring compatible gate drive requirements.