IRLZ44NSTRLPBF N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRLZ44NSTRLPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 55V drain-to-source voltage with 47A continuous drain current in D2PAK surface mount packaging. This device is classified as "Not For New Designs," indicating it has reached end-of-life status. Due to this product status, equivalent substitute parts with compatible electrical and mechanical specifications are necessary for ongoing production support, maintenance applications, and design continuity where the original part is no longer available through standard distribution channels.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	55	V
Continuous Drain Current (Id) @ 25°C	47	A (Tc)
On-Resistance (Rds On Max) @ Id, Vgs	22 mOhm @ 25A, 10V	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ Id	2	V @ 250µA
Gate Charge (Qg Max) @ Vgs	48	nC @ 5V
Maximum Gate Voltage (Vgs Max)	±16	V
Input Capacitance (Ciss Max) @ Vds	1700	pF @ 25V
Power Dissipation (Max)	3.8W (Ta), 110W (Tc)	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
Packaging Format	Cut Tape (CT) & Digi-Reel®	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the IRLZ44NSTRLPBF are selected based on strict electrical and mechanical compatibility within the following criteria:

Primary Substitution Parameters:

Drain-to-Source Voltage (Vdss): Minimum 55V (equal or higher voltage rating acceptable)
Continuous Drain Current (Id): Minimum 47A at 25°C (equal or higher current rating acceptable)
Package Type: D2PAK (TO-263-3) surface mount configuration
FET Type: N-Channel MOSFET (Metal Oxide Semiconductor)
Operating Temperature Range: -55°C to 175°C (TJ)
RoHS Compliance: ROHS3 Compliant
Moisture Sensitivity: MSL 1 (Unlimited)

Secondary Compatibility Factors:

On-Resistance (Rds On): Lower or equal values indicate improved performance
Gate Charge (Qg): Lower values reduce switching losses
Input Capacitance (Ciss): Lower values reduce gate drive requirements
Gate Threshold Voltage (Vgs(th)): Compatibility with existing gate drive circuits
Maximum Gate Voltage (Vgs Max): Must accommodate circuit drive voltage

All substitute parts listed maintain D2PAK packaging compatibility and surface mount mounting type, ensuring mechanical interchangeability without PCB redesign.

Parameter Comparison

Parameter	IRLZ44NSTRLPBF (Main)	IRLZ44SPBF	IRLZ44STRRPBF	PSMN015-60BS,118	STB55NF06LT4
Manufacturer	Infineon Technologies	Vishay Siliconix	Vishay Siliconix	Nexperia USA Inc.	STMicroelectronics
Vdss (V)	55	60	60	60	60
Id @ 25°C (A, Tc)	47	50	50	50	55
Rds On (Max) @ Id, Vgs (mOhm)	22 @ 25A, 10V	28 @ 31A, 5V	28 @ 31A, 5V	14.8 @ 15A, 10V	18 @ 27.5A, 10V
Vgs(th) Max @ Id (V)	2 @ 250µA	2 @ 250µA	2 @ 250µA	4 @ 1mA	4.7 @ 250µA
Qg Max @ Vgs (nC)	48 @ 5V	66 @ 5V	66 @ 5V	20.9 @ 10V	37 @ 4.5V
Vgs Max (±V)	±16	±10	±10	±20	±16
Ciss Max @ Vds (pF)	1700 @ 25V	3300 @ 25V	3300 @ 25V	1220 @ 30V	1700 @ 25V
Power Dissipation Max (W)	3.8 (Ta), 110 (Tc)	3.7 (Ta), 150 (Tc)	3.7 (Ta), 150 (Tc)	86 (Tc)	95 (Tc)
Operating Temperature (°C, TJ)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package Type	D2PAK (TO-263-3)	D2PAK (TO-263-3)	D2PAK (TO-263-3)	D2PAK (TO-263-3)	D2PAK (TO-263-3)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Not For New Designs	Active	Active	Active	Active

Engineering Selection Recommendations

IRLZ44SPBF (Vishay Siliconix, Tube Packaging)

This substitute provides direct electrical compatibility with 60V Vdss rating and 50A continuous drain current, exceeding the original part specifications. The device maintains identical gate threshold voltage (2V @ 250µA) and operating temperature range (-55°C to 175°C). Active product status ensures long-term availability. Tube packaging format differs from the original Cut Tape & Digi-Reel format; verify packaging requirements for automated assembly processes.

IRLZ44STRRPBF (Vishay Siliconix, Tape & Reel Packaging)

Electrically identical to IRLZ44SPBF with 60V/50A ratings and matching gate threshold voltage. Tape & Reel packaging aligns with high-volume production requirements. Active product status and ROHS3 compliance confirmed. This variant is recommended for production environments requiring reel-based component feeding.

PSMN015-60BS,118 (Nexperia USA Inc., Tape & Reel Packaging)

This substitute offers superior on-resistance performance (14.8 mOhm @ 15A, 10V) compared to the original 22 mOhm specification, resulting in reduced power dissipation and improved thermal efficiency. Rated for 60V/50A with higher maximum gate voltage (±20V) providing greater gate drive margin. Gate threshold voltage is elevated to 4V @ 1mA, requiring verification against existing gate drive circuit specifications. Active product status and ROHS3 compliance confirmed.

STB55NF06LT4 (STMicroelectronics, Cut Tape & Digi-Reel Packaging)

This substitute provides the highest continuous drain current rating (55A) among all alternatives, with improved on-resistance (18 mOhm @ 27.5A, 10V). Packaging format matches the original Cut Tape & Digi-Reel configuration. STripFET™ II series designation indicates advanced process technology. Active product status and ROHS3 compliance confirmed. Gate threshold voltage of 4.7V @ 250µA requires circuit compatibility verification.

Frequently Asked Questions (FAQ)

Q: Can IRLZ44SPBF directly replace IRLZ44NSTRLPBF without circuit modification?

A: IRLZ44SPBF provides electrical substitution with higher voltage (60V vs. 55V) and current (50A vs. 47A) ratings. Both devices share identical gate threshold voltage (2V @ 250µA), operating temperature range (-55°C to 175°C), and D2PAK packaging. Direct PCB substitution is mechanically compatible. However, the higher input capacitance (3300 pF vs. 1700 pF) may require gate drive circuit evaluation for switching speed performance.

Q: What is the difference between IRLZ44SPBF and IRLZ44STRRPBF?

A: Both parts are electrically identical with 60V/50A ratings, matching gate threshold voltage, and identical electrical performance. The sole difference is packaging format: IRLZ44SPBF is supplied in Tube packaging, while IRLZ44STRRPBF is supplied in Tape & Reel format. Selection depends on assembly process requirements. Tape & Reel format is standard for automated pick-and-place assembly.

Q: Why does PSMN015-60BS,118 have lower on-resistance than the original part?

A: PSMN015-60BS,118 exhibits lower on-resistance (14.8 mOhm @ 15A, 10V vs. 22 mOhm @ 25A, 10V) due to advanced semiconductor process technology and different measurement conditions. Lower on-resistance reduces conduction losses and heat generation, improving overall circuit efficiency. This represents a performance enhancement in thermal management.

Q: Is gate threshold voltage compatibility critical for substitution?

A: Gate threshold voltage (Vgs(th)) determines the minimum gate-source voltage required to turn the device on. The original IRLZ44NSTRLPBF specifies 2V @ 250µA. IRLZ44SPBF and IRLZ44STRRPBF maintain this 2V specification, ensuring compatibility with existing gate drive circuits. PSMN015-60BS,118 and STB55NF06LT4 specify higher thresholds (4V and 4.7V respectively), requiring verification that gate drive voltage exceeds these values during operation.

Q: Can I use STB55NF06LT4 in applications requiring the original 47A current rating?

A: Yes. STB55NF06LT4 is rated for 55A continuous drain current, which exceeds the original 47A requirement. The device operates within the same temperature range (-55°C to 175°C) and maintains D2PAK packaging compatibility. The higher current rating provides design margin and improved thermal performance in current-limited applications.

Q: What packaging format should I select for automated assembly?

A: For automated surface mount assembly with pick-and-place equipment, Tape & Reel packaging is standard. IRLZ44STRRPBF and PSMN015-60BS,118 are supplied in Tape & Reel format. STB55NF06LT4 is available in Cut Tape & Digi-Reel format, which is also compatible with automated feeders. IRLZ44SPBF in Tube packaging requires manual handling or tube-to-reel conversion.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (IRLZ44SPBF, IRLZ44STRRPBF, PSMN015-60BS,118, and STB55NF06LT4) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original IRLZ44NSTRLPBF specifications. All parts are suitable for applications requiring RoHS compliance.

Q: What is the impact of higher input capacitance in IRLZ44SPBF and IRLZ44STRRPBF?

A: Input capacitance (Ciss) of 3300 pF in IRLZ44SPBF and IRLZ44STRRPBF is approximately double the original 1700 pF specification. Higher input capacitance increases gate charge requirements and may extend switching transition times. Gate drive circuits must supply sufficient current to charge this capacitance within the required switching speed window. Evaluate gate driver output impedance and switching frequency performance in the target application.

Q: Which substitute offers the best thermal performance?

A: PSMN015-60BS,118 demonstrates superior thermal characteristics with the lowest on-resistance (14.8 mOhm @ 15A, 10V), resulting in minimal conduction losses. STB55NF06LT4 provides the highest power dissipation rating (95W Tc) and improved on-resistance (18 mOhm @ 27.5A, 10V). Both alternatives reduce thermal stress compared to the original part, improving reliability in thermally constrained applications.

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