IRFZ24STRLPBF Equivalent & Substitute Parts

Part Overview

The IRFZ24STRLPBF is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 60V drain-to-source voltage with 17A continuous drain current at 25°C. This device is housed in a D2PAK surface mount package and is designed for general-purpose switching applications requiring moderate voltage and current handling. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the specified parameter ranges. Alternatives become necessary due to inventory availability, supply chain optimization, or design flexibility requirements while preserving circuit functionality.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	60	V
Continuous Drain Current (Id) @ 25°C	17	A (Tc)
Rds On (Max) @ 10A, 10V	100	mOhm
Vgs(th) (Max) @ 250µA	4	V
Gate Charge (Qg) (Max) @ 10V	25	nC
Input Capacitance (Ciss) @ 25V	640	pF
Power Dissipation (Max) @ Tc	60	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the IRFZ24STRLPBF is determined by the following critical parameters:

Voltage Rating Compatibility: Substitute parts must maintain a Vdss rating equal to or greater than 60V to ensure safe operation in circuits designed for this voltage class.

Current Handling Capacity: Continuous drain current (Id) at 25°C must meet or exceed 17A to support the same load conditions without thermal derating.

On-State Resistance (Rds On): The maximum on-state resistance at specified gate and drain conditions must not significantly exceed 100mOhm to maintain comparable power dissipation and thermal performance.

Gate Threshold Voltage (Vgs(th)): Threshold voltage must remain within compatible ranges to ensure proper gate drive compatibility with existing control circuits.

Package Compatibility: All substitute parts must use the D2PAK (TO-263-3) surface mount package to ensure mechanical and thermal interface compatibility with existing PCB layouts.

Thermal Performance: Power dissipation capability at case temperature (Tc) must support the application's thermal requirements.

Compliance Requirements: All substitute parts must maintain RoHS3 compliance and MSL Level 1 rating to meet manufacturing and environmental standards.

Parameter Comparison

Parameter	IRFZ24STRLPBF (Main)	BUK9675-55A,118	STB16NF06LT4	PHB21N06LT,118
Manufacturer	Vishay Siliconix	Nexperia USA Inc.	STMicroelectronics	NXP USA Inc.
Vdss (V)	60	55	60	55
Id @ 25°C (A, Tc)	17	20	16	19
Rds On (Max) @ 10A, 10V (mOhm)	100	68	90	70
Vgs(th) (Max) @ Id (V)	4 @ 250µA	2 @ 1mA	1 @ 250µA (Min)	2 @ 1mA
Gate Charge (Qg) (Max) @ Vgs (nC)	25 @ 10V	—	10 @ 4.5V	9.4 @ 5V
Input Capacitance (Ciss) @ 25V (pF)	640	643	345	650
Power Dissipation (Max) @ Tc (W)	60	62	45	56
Operating Temperature (°C, TJ)	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	D2PAK (TO-263-3)	D2PAK (TO-263-3)	D2PAK (TO-263-3)	D2PAK (TO-263-3)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

STB16NF06LT4 (STMicroelectronics): This substitute maintains the 60V Vdss rating matching the original specification. With 16A continuous drain current, it operates within acceptable range for the 17A requirement. The 90mOhm on-state resistance is comparable to the main part. Lower gate charge (10nC) and reduced input capacitance (345pF) provide improved switching characteristics. The part holds Active product status with full RoHS3 compliance and AEC-Q101 automotive qualification. This device is suitable for applications where switching speed optimization is beneficial.

BUK9675-55A,118 (Nexperia USA Inc.): This substitute operates at 55V Vdss, which is 5V below the main part specification. However, it provides superior current handling at 20A continuous drain current and lower on-state resistance (68mOhm). The TrenchMOS™ technology delivers improved thermal performance with 62W power dissipation capability. The part maintains Active status with RoHS3 compliance and AEC-Q101 automotive qualification. This device is applicable in circuits where the 55V rating is acceptable and enhanced current capacity is advantageous.

PHB21N06LT,118 (NXP USA Inc.): This substitute operates at 55V Vdss with 19A continuous drain current, providing balanced performance between the main part and other alternatives. The 70mOhm on-state resistance and 56W power dissipation capability support thermal requirements. Gate charge of 9.4nC and input capacitance of 650pF are comparable to the main part. The part maintains Active product status with RoHS3 compliance and REACH compliance confirmation. This device offers a direct functional alternative with enhanced current capacity.

All three substitute parts maintain identical operating temperature ranges (-55°C to 175°C), D2PAK package compatibility, and MSL Level 1 ratings. Selection between substitutes depends on specific circuit voltage requirements and current handling priorities.

Frequently Asked Questions (FAQ)

Q: Can the BUK9675-55A,118 substitute for the IRFZ24STRLPBF in a 60V circuit?

A: The BUK9675-55A,118 is rated for 55V Vdss, which is 5V below the main part's 60V rating. Substitution is not appropriate for circuits operating at or near 60V. Use this part only in applications where the maximum operating voltage does not exceed 55V.

Q: What is the primary advantage of the STB16NF06LT4 substitute?

A: The STB16NF06LT4 maintains the 60V Vdss rating of the original part while offering reduced gate charge (10nC versus 25nC) and significantly lower input capacitance (345pF versus 640pF). These characteristics enable faster switching transitions and reduced gate drive power requirements.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All substitute parts use the D2PAK (TO-263-3) surface mount package with identical pin configuration and thermal tab placement. Direct PCB layout compatibility is maintained without modification.

Q: Which substitute provides the best thermal performance?

A: The BUK9675-55A,118 offers the highest power dissipation capability at 62W (Tc), compared to 60W for the main part, 56W for the PHB21N06LT,118, and 45W for the STB16NF06LT4. However, thermal performance in actual application depends on PCB thermal design and heat sinking implementation.

Q: Do all substitute parts meet the same compliance standards?

A: All substitute parts maintain RoHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. The BUK9675-55A,118 and PHB21N06LT,118 carry additional AEC-Q101 automotive qualification. The PHB21N06LT,118 includes REACH compliance confirmation.

Q: What is the impact of lower Vgs(th) in substitute parts?

A: The substitute parts exhibit lower gate threshold voltages (1V to 2V) compared to the main part (4V). This results in faster turn-on characteristics and reduced gate drive voltage requirements. Existing gate drive circuits designed for the IRFZ24STRLPBF will operate the substitutes with improved switching speed.

Q: Can the PHB21N06LT,118 be used as a direct replacement?

A: The PHB21N06LT,118 operates at 55V Vdss, requiring voltage rating verification for your application. If the circuit operates below 55V, this part provides enhanced current capacity (19A) and comparable on-state resistance (70mOhm). Confirm voltage compatibility before substitution.

Q: How does on-state resistance affect circuit performance?

A: Lower on-state resistance reduces power dissipation during conduction. The BUK9675-55A,118 (68mOhm) and PHB21N06LT,118 (70mOhm) dissipate less power than the main part (100mOhm) at equivalent current levels. The STB16NF06LT4 (90mOhm) provides comparable performance with slightly lower dissipation.

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