IRF7233 Equivalent & Substitute Parts Reference

Part Overview

The IRF7233 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 designed for applications requiring P-channel switching and amplification in low-voltage circuits.

The IRF7233 is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for legacy systems or redesign initiatives.

Substiute Parts

IRF7233

Infineon TechnologiesIn Stock: 3087IRF7233 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 of the IRF7233 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Drain-to-Source Voltage (Vdss): Must be equal to or greater than 12V
• Continuous Drain Current (Id): Must be equal to or greater than 9.5A at 25°C
• On-Resistance (Rds On): Should be comparable to 20mOhm to maintain circuit performance
• Power Dissipation: Must support 2.5W (Ta) minimum
• Package Type: Must be 8-SOIC surface mount configuration
• FET Channel Type: Must be P-Channel

Identified Substitutes:

AO4453 (Alpha & Omega Semiconductor Inc.): Meets primary substitution criteria with 12V Vdss and 9A continuous drain current. Rds On of 19mOhm is equivalent to the IRF7233. Package is 8-SOIC. Product status is Active, ensuring ongoing availability. RoHS3 compliant.

FDS6375 (onsemi): Exceeds primary substitution criteria with 20V Vdss (higher voltage rating) and 8A continuous drain current. Rds On of 24mOhm is slightly higher but within acceptable tolerance for most applications. Package is 8-SOIC. Product status is Active. RoHS3 compliant. Extended operating temperature range to 175°C.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Electrical Equivalence):

The AO4453 provides the closest electrical match to the IRF7233. Both devices share identical Vdss (12V) and comparable continuous drain current ratings (9A vs. 9.5A). On-resistance values are nearly identical (19mOhm vs. 20mOhm), ensuring equivalent circuit performance. The AO4453 is manufactured by Alpha & Omega Semiconductor Inc., an established supplier with Active product status, guaranteeing long-term availability. The device is RoHS3 compliant, meeting modern environmental and regulatory requirements that the obsolete IRF7233 does not satisfy.

For Applications Requiring Higher Voltage Margin:

The FDS6375 from onsemi is suitable when circuit design permits higher voltage rating. The 20V Vdss provides additional safety margin compared to the 12V requirement of the IRF7233. While continuous drain current is slightly lower at 8A, and on-resistance is marginally higher at 24mOhm, these parameters remain within acceptable operating ranges for most switching applications. The FDS6375 offers an extended operating temperature range (-55°C to 175°C), providing thermal headroom for high-temperature environments. This device is also RoHS3 compliant and maintains Active product status.

Compliance Considerations:

Both substitute parts are RoHS3 compliant, addressing regulatory requirements that the obsolete IRF7233 cannot meet. Selection between AO4453 and FDS6375 should be based on specific circuit voltage and current requirements rather than compliance status, as both meet modern standards.

Frequently Asked Questions (FAQ)

Q: Can the AO4453 be used as a direct drop-in replacement for the IRF7233?

A: Yes. The AO4453 shares the same 8-SOIC package footprint, identical Vdss rating (12V), and comparable electrical characteristics (9A vs. 9.5A continuous drain current, 19mOhm vs. 20mOhm on-resistance). No circuit modifications are required for electrical substitution.

Q: What is the primary difference between the AO4453 and FDS6375?

A: The AO4453 matches the IRF7233 voltage rating (12V Vdss), while the FDS6375 has a higher voltage rating (20V Vdss). The AO4453 provides closer current matching (9A vs. 9.5A), whereas the FDS6375 offers lower current (8A) but extended temperature range. Both are 8-SOIC packaged and RoHS3 compliant.

Q: Why is the IRF7233 classified as obsolete?

A: The IRF7233 is an older Infineon HEXFET product that has been discontinued. Obsolete status indicates the manufacturer no longer produces or supports this device. Active substitutes from other manufacturers ensure continued availability for legacy designs.

Q: Are there any thermal considerations when substituting these parts?

A: All three devices share the same maximum power dissipation rating (2.5W Ta). The FDS6375 offers an extended operating temperature range to 175°C compared to 150°C for the IRF7233 and AO4453. If your application operates near the upper temperature limit, the FDS6375 provides additional thermal margin.

Q: What is the impact of the slightly higher on-resistance in the FDS6375?

A: The FDS6375 on-resistance is 24mOhm compared to 20mOhm in the IRF7233. This 4mOhm difference results in approximately 20% higher conduction losses at rated current. For most switching applications, this difference is negligible. For high-frequency or high-current applications where efficiency is critical, the AO4453 with lower on-resistance may be preferred.

Q: Are both substitute parts available in the same packaging options as the IRF7233?

A: Yes. Both the AO4453 and FDS6375 are available in 8-SOIC surface mount packages with identical footprint dimensions (0.154", 3.90mm width). PCB layout modifications are not required.

Q: Which substitute should I choose for new designs?

A: For new designs, either substitute is acceptable based on circuit requirements. The AO4453 is recommended for applications requiring exact electrical equivalence to the IRF7233. The FDS6375 is recommended for applications where higher voltage margin or extended temperature range provides design benefits. Both devices are RoHS3 compliant and maintain Active product status for long-term supply security.