FDI8442 Equivalent & Substitute Parts

Part Overview

The FDI8442 is an N-Channel MOSFET manufactured by onsemi, rated for 40V drain-to-source voltage with continuous drain current of 23A (Ta) and 80A (Tc). This device is packaged in a TO-262 (I2PAK) through-hole configuration and is part of the PowerTrench® series. The FDI8442 is classified as obsolete, making identification of equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

FDI8442

onsemiIn Stock: 898FDI8442 Datasheet

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IRF1404ZPBF

Infineon TechnologiesIn Stock: 29035IRF1404ZPBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDI8442 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• FET Type: N-Channel MOSFET technology
• Drain to Source Voltage (Vdss): 40V minimum rating
• Continuous Drain Current (Id): Minimum 23A at Ta or equivalent thermal performance
• Gate Threshold Voltage (Vgs(th)): 4V maximum
• Maximum Gate Voltage (Vgs): ±20V
• Operating Temperature Range: -55°C to 175°C

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole configuration
• Package Type: TO-262 or TO-220 series (pin-compatible or functionally equivalent)

The IRF1404ZPBF meets these substitution criteria through matching voltage ratings, gate characteristics, temperature range, and through-hole mounting. While the IRF1404ZPBF offers higher continuous drain current (180A Tc) and different packaging (TO-220AB), it maintains electrical compatibility within the specified parameter envelope and serves as a direct functional substitute for the obsolete FDI8442.

Parameter Comparison

Engineering Selection Recommendations

The IRF1404ZPBF is qualified as a substitute for the obsolete FDI8442 based on the following factors:

Electrical Equivalence: Both devices share identical voltage ratings (40V Vdss), gate threshold characteristics (4V Vgs(th)), and maximum gate voltage (±20V). Operating temperature ranges are identical (-55°C to 175°C). These parameters ensure functional compatibility in circuit applications designed for the FDI8442.

Current Handling: The IRF1404ZPBF provides higher continuous drain current (180A Tc) compared to the FDI8442 (80A Tc), offering improved thermal performance and current capacity. This represents an enhancement rather than a limitation for substitution purposes.

Product Status: The IRF1404ZPBF is classified as Active, ensuring ongoing availability and manufacturing support. The FDI8442 is Obsolete, necessitating substitution for new designs and ongoing procurement.

Compliance: The IRF1404ZPBF carries ROHS3 compliance certification, meeting modern regulatory requirements. Both devices are REACH Unaffected and classified under ECCN EAR99.

Package Consideration: The IRF1404ZPBF uses TO-220AB packaging versus the FDI8442's TO-262 (I2PAK) packaging. Both are through-hole configurations with different pin layouts. PCB redesign or adapter solutions may be required for direct board-level substitution.

Frequently Asked Questions (FAQ)

Q: Can the IRF1404ZPBF directly replace the FDI8442 without PCB modifications?

A: Direct pin-for-pin replacement is not possible due to different package types (TO-220AB versus TO-262 I2PAK). However, the electrical characteristics are compatible. PCB layout modifications or adapter solutions are required for physical substitution.

Q: Are the gate drive requirements identical between these devices?

A: Yes. Both devices operate with a 10V drive voltage for maximum Rds On specification and share identical gate threshold voltage (4V @ 250µA) and maximum gate voltage (±20V). Existing gate drive circuits designed for the FDI8442 are compatible with the IRF1404ZPBF.

Q: What is the significance of the higher drain current rating on the IRF1404ZPBF?

A: The IRF1404ZPBF's 180A continuous drain current (Tc) exceeds the FDI8442's 80A (Tc) rating. This provides additional thermal margin and current capacity, making it suitable for applications requiring higher current handling. The substitute part does not introduce current limitations.

Q: How do the on-resistance characteristics compare?

A: The FDI8442 exhibits 2.9 mOhm @ 80A, 10V, while the IRF1404ZPBF shows 3.7 mOhm @ 75A, 10V. Both values are within acceptable ranges for 40V N-Channel MOSFETs. The IRF1404ZPBF's slightly higher Rds On is offset by its superior current capacity and active product status.

Q: Is the IRF1404ZPBF suitable for the same temperature operating range?

A: Yes. Both devices operate across -55°C to 175°C (TJ), ensuring thermal compatibility in applications designed for the FDI8442.

Q: What packaging considerations should be evaluated?

A: The IRF1404ZPBF's TO-220AB package differs from the FDI8442's TO-262 (I2PAK) package. TO-220AB devices typically require different PCB footprints and mounting hardware. Thermal management characteristics may also differ due to package geometry. Verify thermal performance requirements for your specific application.

Q: Are there any compliance or regulatory differences?

A: The IRF1404ZPBF carries ROHS3 compliance, meeting current regulatory standards. Both devices are REACH Unaffected and classified as EAR99. The IRF1404ZPBF's active status ensures ongoing compliance with evolving regulations.