FDS4488 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The FDS4488 is an N-Channel MOSFET manufactured by onsemi, rated for 30V drain-to-source voltage with 7.9A continuous drain current in an 8SOIC surface mount package. This device is classified as Active product status and is fully ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within the same application category. The substitute parts listed maintain compatibility across the critical parameters of voltage rating, current capacity, package form factor, and thermal characteristics.

Substiute Parts

FDS4488

onsemiIn Stock: 22985FDS4488 Datasheet

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IRF7403TRPBF

Infineon TechnologiesIn Stock: 7169IRF7403TRPBF Datasheet

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STS10N3LH5

STMicroelectronicsIn Stock: 15344STS10N3LH5 Datasheet

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ZXMN3B04N8TA

Diodes IncorporatedIn Stock: 6954ZXMN3B04N8TA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FDS4488 is determined by the following critical parameters:

Voltage Rating Compatibility: All substitute parts must maintain a Drain to Source Voltage (Vdss) rating of 30V or greater to ensure safe operation within the same circuit topology.

Current Capacity: Substitute parts must support continuous drain current (Id) at or above 7.9A at 25°C to meet or exceed the performance envelope of the primary part.

Package Compatibility: All substitute parts utilize the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and thermal compatibility with existing PCB layouts and thermal management designs.

Compliance & Certification: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, ensuring equivalent environmental and handling requirements.

FET Technology: All parts are N-Channel Metal Oxide Semiconductor (MOSFET) devices with identical polarity and switching characteristics.

The following parts meet these substitution criteria: ZXMN3B04N8TA, IRF7403TRPBF, and STS10N3LH5.

Parameter Comparison

Engineering Selection Recommendations

FDS4488 (Primary Part): Active product status with full ROHS3 compliance and unlimited MSL rating. This part is recommended for new designs and ongoing production applications where onsemi supply chain availability is established.

IRF7403TRPBF (Infineon Technologies): Provides 8.5A continuous drain current, exceeding the FDS4488 specification by 0.6A. Classified as Not For New Designs, indicating this part is in mature or declining production phase. Suitable for legacy system maintenance and replacement applications where existing designs already incorporate this device. ROHS3 compliant with identical MSL 1 rating.

STS10N3LH5 (STMicroelectronics): Delivers 10A continuous drain current, providing the highest current capacity among substitute options. Classified as Not For New Designs. Appropriate for retrofit and field replacement scenarios where enhanced current handling is beneficial. ROHS3 compliant with MSL 1 rating. STripFET™ V series designation indicates optimized switching performance characteristics.

ZXMN3B04N8TA (Diodes Incorporated): Rated for 7.2A continuous drain current, operating within 0.7A of the FDS4488 specification. Active product status indicates ongoing production support. Lowest power dissipation rating (2W Ta) among substitute options. ROHS3 compliant with MSL 1 rating. Suitable for applications prioritizing thermal efficiency or where Diodes Incorporated supply chain is preferred.

All substitute parts maintain identical 30V voltage rating, 8-SOIC package form factor, and surface mount compatibility. Selection between substitutes depends on product lifecycle status requirements, current capacity margin needs, and manufacturer supply chain preferences.

Frequently Asked Questions (FAQ)

Q: Can the FDS4488 be directly replaced with IRF7403TRPBF on existing PCBs?

A: Yes. Both devices use identical 8-SOIC (0.154", 3.90mm Width) package geometry and surface mount configuration. Pin-to-pin compatibility is maintained. However, IRF7403TRPBF is classified as Not For New Designs, indicating it is not recommended for new product development.

Q: What is the primary difference between STS10N3LH5 and FDS4488?

A: The STS10N3LH5 provides 10A continuous drain current compared to FDS4488's 7.9A, representing a 26% increase in current capacity. Both maintain 30V voltage rating and identical package form factor. STS10N3LH5 is classified as Not For New Designs.

Q: Is ZXMN3B04N8TA suitable for applications requiring 7.9A continuous current?

A: ZXMN3B04N8TA is rated for 7.2A continuous drain current, which is 0.7A below the FDS4488 specification. This part operates within 91% of the primary part's current rating. Application suitability depends on circuit design margin and thermal management capacity. ZXMN3B04N8TA maintains Active product status.

Q: Do all substitute parts meet the same environmental compliance standards as FDS4488?

A: Yes. All substitute parts (IRF7403TRPBF, STS10N3LH5, ZXMN3B04N8TA) are ROHS3 compliant, REACH Unaffected, classified as EAR99, and maintain MSL 1 (Unlimited) moisture sensitivity level, matching FDS4488 compliance profile.

Q: Which substitute part is recommended for new product designs?

A: FDS4488 (primary part) and ZXMN3B04N8TA are both classified as Active product status and are appropriate for new designs. IRF7403TRPBF and STS10N3LH5 are classified as Not For New Designs and should be reserved for legacy system support and field replacement applications.

Q: Are there thermal performance differences between these parts?

A: Power dissipation ratings vary: FDS4488 (not specified), IRF7403TRPBF (2.5W Ta), STS10N3LH5 (2.5W Tc), and ZXMN3B04N8TA (2W Ta). Thermal performance depends on junction temperature measurement conditions (Ta vs. Tc) and specific operating parameters. Consult device datasheets for detailed thermal characteristics relevant to your application.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: All parts are N-Channel MOSFETs with 30V rating and 8-SOIC package compatibility. Gate charge and input capacitance specifications vary between manufacturers and series. Switching frequency performance depends on these parasitic parameters and circuit design. Verify gate charge (Qg) and input capacitance (Ciss) specifications against application requirements before substitution.