IRFU224 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRFU224 is an N-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) manufactured by Vishay Siliconix, rated for 250V drain-to-source voltage with a continuous drain current of 3.8A at 25°C. The device is packaged in a TO-251AA (IPak) through-hole configuration and is designed for general-purpose switching and amplification applications requiring moderate voltage and current handling.

The IRFU224 carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and repair requirements for systems utilizing this MOSFET.

Substiute Parts

IRFU224

Vishay SiliconixIn Stock: 1518IRFU224 Datasheet

Current PartRFQ

IRFU224PBF

Vishay SiliconixIn Stock: 1239IRFU224PBF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFU224 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Electrical Parameters (Must Match):

• FET Type: N-Channel
• Technology: MOSFET (Metal Oxide)
• Drain to Source Voltage (Vdss): 250V
• Continuous Drain Current (Id) @ 25°C: 3.8A (Tc)
• Drive Voltage (Max Rds On): 10V
• Rds On (Max) @ Id, Vgs: 1.1 Ohm @ 2.3A, 10V
• Vgs(th) (Max) @ Id: 4V @ 250µA
• Gate Charge (Qg) (Max) @ Vgs: 14 nC @ 10V
• Vgs (Max): ±20V
• Input Capacitance (Ciss) (Max) @ Vds: 260 pF @ 25V
• Power Dissipation (Max): 2.5W (Ta), 42W (Tc)
• Operating Temperature Range: -55°C to 150°C (TJ)

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: TO-251-3 Short Leads, IPak, TO-251AA
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts identified below meet all specified electrical and mechanical parameters and are therefore direct functional equivalents suitable for replacement in applications designed for the IRFU224.

Parameter Comparison

Engineering Selection Recommendations

IRFU224PBF is the direct parametric equivalent and substitute for the IRFU224. All electrical and mechanical specifications are identical across the critical performance parameters that determine functional compatibility.

Product Status Consideration: The IRFU224 is classified as obsolete, while the IRFU224PBF maintains active product status. This distinction is significant for long-term component availability and supply chain continuity. Selection of the IRFU224PBF ensures access to current manufacturing and distribution channels.

Compliance Consideration: The IRFU224PBF carries ROHS3 compliance certification, whereas the IRFU224 is RoHS non-compliant. For applications subject to RoHS regulatory requirements or environmental compliance mandates, the IRFU224PBF is the appropriate selection. Both parts carry identical REACH and ECCN classifications (REACH Unaffected, EAR99).

Packaging Consideration: The IRFU224PBF is supplied in tube packaging, whereas the original IRFU224 packaging type is not specified. Both devices utilize the identical TO-251AA physical form factor and through-hole mounting configuration, ensuring direct mechanical compatibility in PCB applications.

Frequently Asked Questions (FAQ)

Q: Can the IRFU224PBF be used as a direct replacement for the IRFU224?

A: Yes. The IRFU224PBF is a parametric equivalent with identical electrical specifications across all critical parameters: 250V Vdss, 3.8A continuous drain current, 1.1 Ohm Rds(on), and identical thermal characteristics. Both devices use the TO-251AA package with through-hole mounting. Substitution is direct without circuit modification.

Q: What is the difference between IRFU224 and IRFU224PBF?

A: The primary differences are product status and compliance certification. The IRFU224 is obsolete and RoHS non-compliant. The IRFU224PBF is an active product with ROHS3 compliance. Electrical and mechanical specifications are identical. The IRFU224PBF is supplied in tube packaging.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts specify identical power dissipation ratings (2.5W at Ta, 42W at Tc), operating temperature range (-55°C to 150°C), and all electrical parameters including gate charge, input capacitance, and threshold voltage.

Q: Is the TO-251AA package the same for both parts?

A: Yes. Both the IRFU224 and IRFU224PBF use the TO-251-3 Short Leads, IPak, TO-251AA package configuration. Physical dimensions and pin assignments are identical, ensuring direct PCB compatibility.

Q: Why should I select IRFU224PBF over IRFU224?

A: The IRFU224PBF is recommended for new designs and ongoing production due to its active product status, ensuring continued availability and supply chain support. Additionally, ROHS3 compliance satisfies environmental and regulatory requirements applicable to many industries and markets.

Q: Are moisture sensitivity levels the same?

A: Yes. Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage, handling, or reflow processes.

Q: Can I use these parts interchangeably in existing designs?

A: Yes. The IRFU224PBF is a direct functional equivalent with identical electrical performance and physical form factor. No design changes, circuit modifications, or PCB layout adjustments are required for substitution.