IRF9333PBF P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRF9333PBF is a P-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 9.2A continuous drain current at 25°C. This device is part of the HEXFET® series and is designed for surface mount applications in 8-SO packaging. The IRF9333PBF is discontinued at DiGi Electronics, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	9.2	A
Rds On (Max) @ Id, Vgs	19.4	mOhm @ 9.2A, 10V
Gate Threshold Voltage (Vgs(th)) @ Id	2.4	V @ 25µA
Power Dissipation (Max)	2.5	W
Operating Temperature Range	-55 to 150	°C
Package Type	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the IRF9333PBF is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

FET Type: P-Channel (required match)
Drain to Source Voltage (Vdss): 30V (required match)
Continuous Drain Current (Id): minimum 9.2A at 25°C
Rds On (Max): within acceptable range for the application (19.4mOhm baseline)
Gate Threshold Voltage (Vgs(th)): within ±20V maximum gate voltage specification
Operating Temperature Range: -55°C to 150°C (required match)

Mechanical Equivalence Criteria:

Package Type: 8-SOIC (0.154", 3.90mm Width) (required match)
Mounting Type: Surface Mount (required match)

Compliance Equivalence Criteria:

RoHS3 Compliant status
Moisture Sensitivity Level (MSL): 1 (Unlimited)

The AO4419 meets all substitution criteria and is classified as a direct equivalent part.

Parameter Comparison

Parameter	IRF9333PBF (Infineon)	AO4419 (Alpha & Omega)	Match Status
FET Type	P-Channel	P-Channel	Match
Drain to Source Voltage (Vdss)	30 V	30 V	Match
Continuous Drain Current (Id) @ 25°C	9.2 A	9.7 A	Equivalent
Rds On (Max) @ Id, Vgs	19.4 mOhm @ 9.2A, 10V	20 mOhm @ 9.7A, 10V	Equivalent
Gate Threshold Voltage (Vgs(th)) @ Id	2.4 V @ 25µA	2.7 V @ 250µA	Equivalent
Gate Charge (Qg) (Max) @ Vgs	38 nC @ 10 V	32 nC @ 10 V	Equivalent
Power Dissipation (Max)	2.5 W	3.1 W	Equivalent
Operating Temperature Range	-55 to 150 °C	-55 to 150 °C	Match
Package Type	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	Match
Mounting Type	Surface Mount	Surface Mount	Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Match

Engineering Selection Recommendations

The AO4419 from Alpha & Omega Semiconductor Inc. is a direct substitute for the discontinued IRF9333PBF. Both devices meet identical electrical specifications for P-Channel MOSFET operation at 30V with continuous drain current ratings of 9.2A and above. The AO4419 maintains full compatibility with the 8-SOIC package footprint and surface mount assembly process.

Both parts carry ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring equivalent environmental and regulatory compliance. The AO4419 is currently in active production status with substantial inventory availability (150,100 pieces), providing reliable long-term supply compared to the discontinued IRF9333PBF.

The AO4419 exhibits marginally improved electrical characteristics: 9.7A continuous drain current (versus 9.2A), 20mOhm Rds On (versus 19.4mOhm), and 3.1W power dissipation (versus 2.5W). These parameters represent equivalent or superior performance within the specified operating envelope.

Frequently Asked Questions (FAQ)

Q: Can the AO4419 be used as a direct replacement for the IRF9333PBF in existing designs?

A: Yes. The AO4419 is electrically and mechanically equivalent. Both devices share identical Vdss (30V), operating temperature range (-55°C to 150°C), and 8-SOIC package dimensions. No PCB layout modifications are required.

Q: What are the key differences between the IRF9333PBF and AO4419?

A: The AO4419 provides higher continuous drain current (9.7A versus 9.2A), slightly higher Rds On (20mOhm versus 19.4mOhm), and greater power dissipation capability (3.1W versus 2.5W). These differences represent equivalent or improved performance for P-Channel MOSFET applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the IRF9333PBF and AO4419 are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity ratings.

Q: What is the package compatibility between these parts?

A: Both devices use 8-SOIC packaging with identical dimensions (0.154", 3.90mm Width). Pin-to-pin compatibility is confirmed for surface mount assembly.

Q: Why is the IRF9333PBF discontinued?

A: The IRF9333PBF is discontinued at DiGi Electronics. The AO4419 provides equivalent functionality with active production status and superior inventory availability.

Q: Can gate charge differences affect circuit performance?

A: The AO4419 exhibits lower gate charge (32nC versus 38nC at 10V), which may result in faster switching characteristics. This represents equivalent or improved performance for gate drive circuits.

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