IRF7233TR Equivalent & Substitute Parts Reference

Part Overview

The IRF7233TR is a P-Channel MOSFET manufactured by Infineon Technologies, rated for 12V drain-to-source voltage with 9.5A continuous drain current at 25°C. This device is packaged in an 8-SO surface mount configuration and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute components is essential for design continuity, production planning, and long-term supply chain management. Substitute parts must maintain compatibility across critical electrical parameters including voltage rating, current capacity, on-resistance characteristics, and thermal performance.

Substiute Parts

IRF7233TR

Infineon TechnologiesIn Stock: 35467IRF7233TR Datasheet

Current PartRFQ

AO4453

Alpha & Omega Semiconductor Inc.In Stock: 12191AO4453 Datasheet

MFR RecommendedRFQ

FDS6375

onsemiIn Stock: 80400FDS6375 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IRF7233TR is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• FET Type: P-Channel topology required
• Drain to Source Voltage (Vdss): Minimum 12V (equal or higher acceptable)
• Continuous Drain Current (Id): Minimum 9.5A at 25°C (equal or higher acceptable)
• On-Resistance (Rds On): Maximum 20mOhm @ rated current and gate voltage (lower values acceptable)
• Power Dissipation: Minimum 2.5W (Ta) (equal or higher acceptable)
• Mounting Type: Surface Mount required
• Package: 8-SOIC form factor required

Compliance Considerations:

• Product Status: Active status preferred for long-term availability
• RoHS Compliance: ROHS3 compliance preferred for regulatory alignment
• Operating Temperature: Minimum -55°C to 150°C range required

The two identified substitute parts meet these criteria with variations in specific parameters that remain within acceptable engineering tolerances for P-Channel MOSFET applications.

Parameter Comparison

Engineering Selection Recommendations

AO4453 Selection Criteria: The AO4453 from Alpha & Omega Semiconductor Inc. is classified as Active product status, ensuring continued availability and supply chain stability. This substitute maintains the 12V Vdss rating and delivers 9A continuous drain current, which is 0.5A lower than the IRF7233TR but remains within acceptable operating margins for most applications. The on-resistance of 19mOhm at 9A, 4.5V is superior to the original specification of 20mOhm at 9.5A, 4.5V. The AO4453 achieves ROHS3 compliance, addressing regulatory requirements for new designs. Operating temperature range matches the original part at -55°C to 150°C. This substitute is optimal for applications where the 12V voltage rating is critical and current requirements can accommodate the 9A specification.

FDS6375 Selection Criteria: The FDS6375 from onsemi is classified as Active product status with extended operating temperature range to 175°C. This substitute features a higher Vdss rating of 20V, providing additional voltage margin and design flexibility. Continuous drain current is specified at 8A, which is lower than both the original and the AO4453. The on-resistance of 24mOhm at 8A, 4.5V is slightly higher than the original specification but remains within acceptable limits. The FDS6375 achieves ROHS3 compliance and is part of the PowerTrench® series. This substitute is suitable for applications where higher voltage headroom is beneficial or where the extended temperature range to 175°C is required.

Compliance and Availability: Both substitute parts are ROHS3 compliant, supporting modern regulatory requirements. Both are classified as Active products, ensuring long-term supply availability compared to the obsolete IRF7233TR. Selection between AO4453 and FDS6375 should be based on specific application requirements regarding voltage rating, current capacity, and thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can the AO4453 directly replace the IRF7233TR in all applications? A: The AO4453 is electrically compatible with the IRF7233TR for applications requiring 12V operation and up to 9A continuous drain current. Both devices share identical 8-SOIC packaging and thermal specifications (2.5W). The AO4453 delivers superior on-resistance performance (19mOhm vs. 20mOhm). However, applications designed for the full 9.5A capability of the IRF7233TR must be re-evaluated, as the AO4453 is rated for 9A maximum.

Q: What is the primary difference between the AO4453 and FDS6375 substitutes? A: The AO4453 maintains the 12V Vdss rating of the original IRF7233TR, while the FDS6375 provides a higher 20V Vdss rating. The AO4453 supports 9A continuous drain current, whereas the FDS6375 is rated for 8A. The FDS6375 offers an extended operating temperature range to 175°C compared to 150°C for both the original and AO4453. On-resistance specifications differ slightly: AO4453 at 19mOhm versus FDS6375 at 24mOhm.

Q: Are both substitute parts available in the same 8-SOIC package? A: Yes. Both the AO4453 and FDS6375 are packaged in 8-SOIC (0.154", 3.90mm Width) format, identical to the IRF7233TR. This ensures mechanical and electrical compatibility with existing PCB layouts without requiring design modifications.

Q: Which substitute part should be selected for new designs? A: For new designs, either substitute is acceptable based on application requirements. The AO4453 is recommended when the 12V voltage rating is critical and current requirements are within 9A. The FDS6375 is recommended when higher voltage margin (20V) or extended temperature operation to 175°C is beneficial. Both parts are ROHS3 compliant and classified as Active products, supporting long-term supply chain stability.

Q: What are the on-resistance implications of using these substitutes? A: The AO4453 provides improved on-resistance (19mOhm) compared to the IRF7233TR (20mOhm), resulting in lower power dissipation and improved efficiency. The FDS6375 has slightly higher on-resistance (24mOhm), which may result in marginally increased power dissipation but remains within the 2.5W thermal specification for both devices. Applications sensitive to on-resistance performance should prioritize the AO4453.

Q: Are there any gate voltage (Vgs) differences that affect circuit design? A: The IRF7233TR specifies Vgs (Max) at ±12V, while both substitutes limit Vgs (Max) to ±8V. This difference must be evaluated in applications using gate drive voltages exceeding ±8V. Gate threshold voltage (Vgs(th)) specifications also vary: IRF7233TR at 600mV, AO4453 at 900mV, and FDS6375 at 1.5V. These variations may affect switching characteristics and should be verified in timing-critical applications.