BSO303SPNTMA1 P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The BSO303SPNTMA1 is a P-Channel 30V MOSFET manufactured by Infineon Technologies in the OptiMOS™ series, rated for 8.9A continuous drain current at 25°C in an 8-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 150°C and features a maximum Rds(on) of 21mOhm at 8.9A and 10V gate-source voltage.

Substiute Parts

BSO303SPNTMA1

Infineon TechnologiesIn Stock: 768BSO303SPNTMA1 Datasheet

Current PartRFQ

IRF7416TRPBF

Infineon TechnologiesIn Stock: 36304IRF7416TRPBF Datasheet

MFR RecommendedRFQ

SI4435DYTRPBF

Infineon TechnologiesIn Stock: 17423SI4435DYTRPBF Datasheet

MFR RecommendedRFQ

SI4435DY

onsemiIn Stock: 2765SI4435DY Datasheet

UpgradeRFQ

AO4419

Alpha & Omega Semiconductor Inc.In Stock: 150171AO4419 Datasheet

MFR RecommendedRFQ

DMP3036SSS-13

Diodes IncorporatedIn Stock: 1338DMP3036SSS-13 Datasheet

MFR RecommendedRFQ

FDS4435BZ

onsemiIn Stock: 68203FDS4435BZ Datasheet

MFR RecommendedRFQ

RS3E075ATTB

Rohm SemiconductorIn Stock: 11487RS3E075ATTB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BSO303SPNTMA1 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• FET Type: P-Channel (mandatory)
• Drain to Source Voltage (Vdss): 30V (mandatory)
• Package / Case: 8-SOIC (0.154", 3.90mm Width) (mandatory)
• Mounting Type: Surface Mount (mandatory)
• Operating Temperature Range: Minimum -55°C to 150°C (mandatory)

Performance Parameters (within acceptable tolerance):

• Continuous Drain Current (Id): 8.0A to 10.0A range
• Rds(on) Max: 20–23.5 mOhm
• Vgs(th) Max: 1V to 3V
• Gate Charge (Qg): 16.5 to 92 nC
• Input Capacitance (Ciss): 1250 to 2320 pF
• Power Dissipation: 1.4W to 3.1W

All substitute parts listed meet the mandatory electrical and mechanical criteria. Differences in performance parameters reflect design variations across manufacturers while maintaining functional compatibility within the 30V, 8–10A P-Channel MOSFET category.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Product Status, ROHS3 Compliant):

The following parts are recommended as direct substitutes based on active product status and full regulatory compliance:

• IRF7416TRPBF (Infineon HEXFET®): Rated for 10A continuous drain current, matching the BSO303SPNTMA1 voltage and package specifications. Active product status with ROHS3 compliance. Higher current rating provides design margin.

• SI4435DYTRPBF (Infineon HEXFET®): Rated for 8A continuous drain current, closely matching the BSO303SPNTMA1 performance envelope. Active product status with ROHS3 compliance. Lower gate charge (60 nC) reduces switching losses.

• SI4435DY (onsemi PowerTrench®): Rated for 8.8A continuous drain current with extended operating temperature to 175°C. Active product status with ROHS3 compliance. Lower gate charge (24 nC @ 5V) improves switching efficiency.

• AO4419 (Alpha & Omega Semiconductor): Rated for 9.7A continuous drain current with higher power dissipation rating (3.1W). Active product status with ROHS3 compliance. Suitable for applications requiring additional thermal margin.

• DMP3036SSS-13 (Diodes Incorporated): Rated for 19.5A continuous drain current with lowest power dissipation (1.4W). Active product status with ROHS3 compliance. Highest current capability for demanding applications.

• FDS4435BZ (onsemi PowerTrench®): Rated for 8.8A continuous drain current. Active product status with ROHS3 compliance. Extended Vgs(max) to ±25V provides additional gate voltage margin.

Secondary Substitute (Not For New Designs):

• RS3E075ATTB (Rohm Semiconductor): Rated for 7.5A continuous drain current. Product status is "Not For New Designs." ROHS3 compliant. Suitable only for legacy system maintenance or repair applications where new design qualification is not required.

Frequently Asked Questions (FAQ)

Q: Can the BSO303SPNTMA1 be directly replaced with any of these substitute parts?

A: Yes, all listed substitute parts share the same critical electrical parameters (30V Vdss, P-Channel, 8–10A continuous drain current range) and identical 8-SOIC package footprint. Pin-to-pin compatibility is maintained across all substitutes.

Q: What is the difference between the Infineon and onsemi versions of SI4435?

A: SI4435DYTRPBF (Infineon) and SI4435DY (onsemi) are based on the same core design but differ in gate charge specifications and maximum operating temperature. The onsemi version (SI4435DY) extends to 175°C and features lower gate charge (24 nC @ 5V), while the Infineon version operates to 150°C with 60 nC gate charge @ 10V.

Q: Why does DMP3036SSS-13 have a much higher current rating (19.5A) than the original part?

A: DMP3036SSS-13 represents a higher-performance variant within the same voltage and package class. The increased current rating reflects improved die design and thermal characteristics. It is a direct substitute that provides additional design margin for current-limited applications.

Q: Is the RS3E075ATTB suitable for new product designs?

A: No. RS3E075ATTB carries a "Not For New Designs" status, indicating it is intended for legacy system support only. For new designs, select from the active-status alternatives: IRF7416TRPBF, SI4435DYTRPBF, SI4435DY, AO4419, DMP3036SSS-13, or FDS4435BZ.

Q: What is the significance of RoHS compliance in selecting a substitute?

A: The original BSO303SPNTMA1 is RoHS non-compliant. All active substitute parts listed are ROHS3 compliant, meeting current environmental and regulatory requirements for manufacturing and distribution in regulated markets. This is a critical consideration for new production and supply chain qualification.

Q: How do gate charge differences affect circuit performance?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. Lower gate charge (e.g., DMP3036SSS-13 at 16.5 nC, SI4435DY at 24 nC) reduces switching losses and allows faster switching speeds. Higher gate charge (e.g., IRF7416TRPBF at 92 nC) may require stronger gate drive circuits but provides more robust switching characteristics.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts are available in 8-SOIC surface mount packages matching the BSO303SPNTMA1 footprint. Packaging options (Cut Tape, Digi-Reel, Tape & Reel) vary by manufacturer and distributor but do not affect electrical or mechanical compatibility.

Q: What thermal considerations apply when selecting a substitute?

A: Power dissipation ratings range from 1.4W (DMP3036SSS-13) to 3.1W (AO4419). Applications with tight thermal constraints should prioritize lower power dissipation parts. The extended operating temperature range of SI4435DY (-55°C to 175°C) is beneficial for high-temperature environments.