IRFZ44ZL N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRFZ44ZL is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 55V drain-to-source voltage with 51A continuous drain current at 25°C. This device is housed in a TO-262 through-hole package and is designed for power switching applications requiring moderate voltage and current handling capabilities.

The IRFZ44ZL carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support legacy system maintenance or redesign initiatives.

Substiute Parts

IRFZ44ZL

Infineon TechnologiesIn Stock: 968IRFZ44ZL Datasheet

Current PartRFQ

IRFZ44ZLPBF

International RectifierIn Stock: 3696IRFZ44ZLPBF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFZ44ZL is determined by strict electrical and mechanical parameter matching within the N-Channel MOSFET category. The following parameters establish substitution eligibility:

Electrical Parameters (Critical):

• Drain to Source Voltage (Vdss): 55V
• Continuous Drain Current (Id) @ 25°C: 51A (Tc)
• Rds On (Max) @ 31A, 10V: 13.9 mOhm
• Gate Threshold Voltage (Vgs(th)) @ 250µA: 4V
• Gate Charge (Qg) @ 10V: 43 nC
• Power Dissipation (Max): 80W (Tc)
• Operating Temperature Range: -55°C to 175°C (TJ)

Mechanical Parameters (Critical):

• Mounting Type: Through Hole
• Package: TO-262-3 Long Leads, I2PAK, TO-262AA

Only parts matching all critical electrical and mechanical parameters are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

IRFZ44ZLPBF is a parametric equivalent substitute for the IRFZ44ZL. All critical electrical and mechanical parameters are identical, ensuring functional compatibility in circuit applications.

Product Status Consideration: The IRFZ44ZL is classified as Obsolete, while the IRFZ44ZLPBF is Active. Selection of the IRFZ44ZLPBF provides access to an actively manufactured part with established supply chain availability (3671 Pcs in stock versus 880 Pcs for the obsolete variant).

Compliance and Certification: The IRFZ44ZLPBF maintains the same ECCN classification (EAR99) and operates under the same regulatory framework. Both parts are HEXFET® series devices. The IRFZ44ZL is RoHS non-compliant; compliance status for the IRFZ44ZLPBF is not specified in the provided data.

Recommendation Basis: Selection should be based on supply availability, product lifecycle status, and compliance requirements specific to the end application. The parametric equivalence ensures direct functional substitution without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the IRFZ44ZLPBF directly replace the IRFZ44ZL in existing designs?

A: Yes. The IRFZ44ZLPBF is a parametric equivalent with identical electrical ratings (55V Vdss, 51A Id, 13.9 mOhm Rds On) and mechanical specifications (TO-262 through-hole package). No circuit modifications are required.

Q: What is the primary difference between these two parts?

A: The IRFZ44ZL is manufactured by Infineon Technologies and carries Obsolete status. The IRFZ44ZLPBF is manufactured by International Rectifier and is Active. Both are HEXFET® series N-Channel MOSFETs with identical performance parameters.

Q: Are there any package compatibility concerns?

A: No. Both parts use the TO-262-3 Long Leads package (I2PAK, TO-262AA). Pin configuration and mechanical dimensions are identical, enabling direct board-level substitution.

Q: Why should I consider the IRFZ44ZLPBF over the IRFZ44ZL?

A: The IRFZ44ZLPBF is actively manufactured and has higher inventory availability (3671 Pcs versus 880 Pcs). For new designs or legacy system maintenance, the active part ensures long-term supply chain continuity.

Q: Are there any thermal or operating condition differences?

A: No. Both parts operate across the same temperature range (-55°C to 175°C TJ) and dissipate the same maximum power (80W Tc). Thermal performance is equivalent.

Q: What certifications apply to both parts?

A: Both parts carry EAR99 ECCN classification and are HEXFET® series devices. The IRFZ44ZL is RoHS non-compliant. RoHS compliance status for the IRFZ44ZLPBF is not specified in available documentation.