IRFZ44VZPBF N-Channel 60V 57A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFZ44VZPBF is an N-Channel MOSFET manufactured by Infineon Technologies in the HEXFET® series, rated for 60V drain-to-source voltage and 57A continuous drain current at 25°C. The device is packaged in TO-220AB through-hole configuration with a maximum power dissipation of 92W. The part is classified as "Not For New Designs," indicating it has been superseded in Infineon's product portfolio. Equivalent and substitute parts are necessary for applications requiring continued sourcing, design flexibility, or performance optimization within compatible electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	60	V
Continuous Drain Current (Id) @ 25°C	57	A
On-State Resistance (Rds On) @ 34A, 10V	12	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	65	nC
Power Dissipation (Max)	92	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-220-3	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the IRFZ44VZPBF is determined by strict adherence to the following electrical and mechanical criteria:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 60V
Continuous Drain Current (Id): Must equal or exceed 57A at 25°C
Gate Threshold Voltage (Vgs(th)): Must be compatible at specified gate drive voltage (10V nominal)
Package Type: Must be TO-220-3 or equivalent through-hole configuration
Operating Temperature Range: Must support -55°C to 175°C minimum
RoHS3 Compliance: Required for regulatory alignment

Secondary Compatibility Parameters:

On-State Resistance (Rds On): Lower values indicate improved performance but do not prevent substitution
Gate Charge (Qg): Affects switching speed; variations are acceptable within application requirements
Power Dissipation: Higher ratings provide design margin

Substitute parts are grouped into two categories: Direct Equivalents (matching or exceeding all primary criteria with identical or superior performance) and Compatible Alternatives (meeting minimum electrical requirements with acceptable trade-offs in secondary parameters).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Qg (nC)	Pd Max (W)	Status	Package
IRFZ44VZPBF	Infineon	60	57	12 @ 34A, 10V	65 @ 10V	92	Not For New Designs	TO-220-3
IRF1018EPBF	Infineon	60	79	8.4 @ 47A, 10V	69 @ 10V	110	Active	TO-220-3
IRFZ44PBF	Vishay Siliconix	60	50	28 @ 31A, 10V	67 @ 10V	150	Active	TO-220-3
IRFZ44RPBF	Vishay Siliconix	60	50	28 @ 31A, 10V	67 @ 10V	150	Active	TO-220-3
IXTP70N075T2	IXYS	75	70	12 @ 25A, 10V	46 @ 10V	150	Active	TO-220-3
PSMN3R0-60PS,127	Nexperia USA Inc.	60	100	3 @ 25A, 10V	130 @ 10V	306	Obsolete	TO-220-3
PSMN4R6-60PS,127	Nexperia USA Inc.	60	100	4.6 @ 25A, 10V	70.8 @ 10V	211	Obsolete	TO-220-3
STP45NF06	STMicroelectronics	60	38	28 @ 19A, 10V	58 @ 10V	80	Active	TO-220-3
STP55NF06	STMicroelectronics	60	50	18 @ 27.5A, 10V	60 @ 10V	110	Active	TO-220-3
STP60NF06	STMicroelectronics	60	60	16 @ 30A, 10V	73 @ 10V	110	Active	TO-220-3
STP60NF06L	STMicroelectronics	60	60	14 @ 30A, 10V	66 @ 4.5V	110	Active	TO-220-3

Engineering Selection Recommendations

Tier 1: Direct Equivalents (Recommended for New Designs)

IRF1018EPBF (Infineon) is the primary recommended substitute. It maintains the same 60V Vdss rating, exceeds the 57A continuous drain current requirement at 79A, and is classified as Active product status. The lower on-state resistance (8.4 mOhm vs. 12 mOhm) provides improved thermal performance. RoHS3 compliance and identical operating temperature range ensure regulatory and thermal compatibility.

STP60NF06 and STP60NF06L (STMicroelectronics) are functionally equivalent alternatives. Both deliver 60A continuous drain current, matching or exceeding the IRFZ44VZPBF specification. STP60NF06L offers superior on-state resistance (14 mOhm) and lower gate charge (66 nC), enabling faster switching. Both are Active status products with full RoHS3 compliance.

Tier 2: Compatible Alternatives (Acceptable for Existing Designs)

IRFZ44PBF and IRFZ44RPBF (Vishay Siliconix) share the same base part number and 60V rating. Continuous drain current is rated at 50A, which is below the IRFZ44VZPBF specification. These parts are suitable only for applications where 50A operation is acceptable. Both are Active status with RoHS3 compliance.

STP55NF06 (STMicroelectronics) provides 50A continuous drain current with improved on-state resistance (18 mOhm) compared to Vishay alternatives. Active status and RoHS3 compliance are confirmed.

Tier 3: Higher Voltage or Current Alternatives (Design Margin Applications)

IXTP70N075T2 (IXYS) offers 75V Vdss and 70A continuous drain current, providing voltage and current margin. The 12 mOhm on-state resistance matches the IRFZ44VZPBF. This part is suitable for applications requiring higher voltage headroom. Active status and RoHS3 compliance are confirmed.

PSMN3R0-60PS,127 and PSMN4R6-60PS,127 (Nexperia USA Inc.) both deliver 100A continuous drain current at 60V, providing significant current margin. However, both are classified as Obsolete. These parts should be used only for legacy system maintenance where new sourcing is unavailable.

Tier 4: Lower Current Alternatives (Reduced Specification Applications)

STP45NF06 (STMicroelectronics) is rated for 38A continuous drain current, below the IRFZ44VZPBF requirement. This part is suitable only for applications with reduced current demands. Active status and RoHS3 compliance are confirmed.

Compliance and Regulatory Status:

All recommended substitutes maintain RoHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and REACH Unaffected status. Operating temperature ranges support -55°C to 175°C minimum requirements. All parts are classified as EAR99 for export control purposes.

Frequently Asked Questions (FAQ)

Q1: Can IRFZ44PBF or IRFZ44RPBF directly replace IRFZ44VZPBF?

IRFZ44PBF and IRFZ44RPBF are rated for 50A continuous drain current, which is below the IRFZ44VZPBF specification of 57A. Direct substitution is not recommended for applications requiring the full 57A rating. These parts are suitable only if the application current requirement does not exceed 50A at 25°C.

Q2: What is the difference between STP60NF06 and STP60NF06L?

Both parts deliver 60A continuous drain current at 60V. STP60NF06L offers improved on-state resistance (14 mOhm vs. 16 mOhm) and lower gate charge (66 nC vs. 73 nC), resulting in faster switching and reduced power dissipation. STP60NF06L also supports a lower gate threshold voltage (1V vs. 4V) and operates at -65°C minimum temperature. STP60NF06L is the superior choice for new designs.

Q3: Why is IRF1018EPBF recommended over the original IRFZ44VZPBF?

IRF1018EPBF is classified as Active product status, whereas IRFZ44VZPBF is "Not For New Designs." IRF1018EPBF exceeds all electrical specifications: 79A vs. 57A continuous drain current, 8.4 mOhm vs. 12 mOhm on-state resistance, and 110W vs. 92W power dissipation. The improved performance and active product status make it the preferred choice for new designs and long-term sourcing.

Q4: Can IXTP70N075T2 be used in place of IRFZ44VZPBF?

IXTP70N075T2 can be used as a substitute if the application circuit tolerates 75V Vdss instead of 60V. The higher voltage rating provides design margin but does not prevent substitution. The 70A continuous drain current exceeds the 57A requirement. On-state resistance (12 mOhm) matches the original part. Verify that the higher voltage rating does not affect circuit performance or component ratings.

Q5: Are Nexperia PSMN3R0-60PS,127 and PSMN4R6-60PS,127 suitable for new designs?

Both Nexperia parts are classified as Obsolete. They should not be used for new designs. These parts are listed as substitutes only for legacy system maintenance or repair where continued sourcing of the original IRFZ44VZPBF is unavailable. For new designs, select from Active status alternatives such as IRF1018EPBF or STP60NF06L.

Q6: What is the significance of the TO-220-3 package designation?

TO-220-3 is a through-hole package with three leads: Gate, Drain, and Source. All listed substitutes use this identical package, ensuring mechanical and electrical compatibility with existing PCB layouts. No board redesign is required when substituting between parts with the same TO-220-3 designation.

Q7: How do gate charge differences affect substitution?

Gate charge (Qg) determines the energy required to switch the MOSFET on and off. The IRFZ44VZPBF has 65 nC gate charge. Substitutes with lower gate charge (such as IXTP70N075T2 at 46 nC) enable faster switching and reduced driver power dissipation. Substitutes with higher gate charge (such as PSMN3R0-60PS,127 at 130 nC) require more driver current but do not prevent substitution if the gate driver is capable of supplying the required charge.

Q8: What does "Not For New Designs" status mean?

"Not For New Designs" indicates that the manufacturer (Infineon) has superseded the IRFZ44VZPBF in its product portfolio. The part remains available for existing applications but is not recommended for new circuit designs. Designers should select from Active status alternatives to ensure long-term availability and access to manufacturer support.

Q9: Are all listed substitutes RoHS3 compliant?

Yes. All substitute parts listed in this document are RoHS3 compliant, indicating compliance with the Restriction of Hazardous Substances Directive. All parts also maintain Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status, ensuring regulatory compatibility across global markets.

Q10: Which substitute offers the best on-state resistance performance?

PSMN3R0-60PS,127 offers the lowest on-state resistance at 3 mOhm, followed by PSMN4R6-60PS,127 at 4.6 mOhm. However, both are Obsolete. Among Active status parts, IRF1018EPBF provides the best on-state resistance at 8.4 mOhm, matching IXTP70N075T2. STP60NF06L offers 14 mOhm, which is superior to the original IRFZ44VZPBF at 12 mOhm when accounting for measurement conditions.

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