IRFZ46NSTRRPBF N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRFZ46NSTRRPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 55V drain-to-source voltage with 53A continuous drain current in D2PAK surface mount packaging. This device is classified as Obsolete, making substitute parts necessary for new designs and ongoing production support. The part operates across a wide temperature range from -55°C to 175°C and is supplied in Tape & Reel packaging format.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	55	V
Continuous Drain Current (Id) @ 25°C	53	A (Tc)
Rds On (Max) @ 28A, 10V	16.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	72	nC
Input Capacitance (Ciss) @ 25V	1696	pF
Power Dissipation (Max)	3.8 (Ta), 107 (Tc)	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
Packaging Format	Tape & Reel (TR)	-

Substitute Part Grouping Explanation

Substitution of the IRFZ46NSTRRPBF is determined by the following critical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Minimum 55V required
Continuous Drain Current (Id): Minimum 53A at Tc
Package Type: D2PAK (TO-263-3) surface mount only
Operating Temperature Range: -55°C to 175°C minimum
Gate Drive Voltage: 10V nominal
RoHS/REACH Compliance: ROHS3 Compliant, REACH Unaffected

Substitution Logic: Parts are grouped into two categories based on electrical performance and product status:

Parametric Equivalent (Identical Specifications): IRFZ46NSTRLPBF maintains identical electrical characteristics but differs only in packaging format (Cut Tape & Digi-Reel vs. Tape & Reel).
Manufacturer Recommended Substitutes (Enhanced Performance): STB55NF06LT4, STB55NF06T4, STB60NF06T4, and PSMN015-60BS,118 provide equal or superior electrical performance with higher voltage ratings (60V) and improved power dissipation capabilities. These parts are Active status and fully compliant with current design standards.

All substitute parts maintain D2PAK packaging, surface mount configuration, and compatible gate drive requirements.

Parameter Comparison

Parameter	IRFZ46NSTRRPBF	IRFZ46NSTRLPBF	PSMN015-60BS,118	STB55NF06LT4	STB55NF06T4	STB60NF06T4
Manufacturer	Infineon	Infineon	Nexperia	STMicroelectronics	STMicroelectronics	STMicroelectronics
Vdss (V)	55	55	60	60	60	60
Id @ 25°C (A)	53	53	50	55	50	60
Rds On (Max) @ 10V (mOhm)	16.5	16.5	14.8	18	18	16
Vgs(th) (V)	4	4	4	4.7	4	4
Gate Charge (nC)	72	72	20.9	37	60	66
Ciss (pF)	1696	1696	1220	1700	1300	1810
Power Dissipation (W)	107 (Tc)	107 (Tc)	86 (Tc)	95 (Tc)	110 (Tc)	110 (Tc)
Operating Temp (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-65 to 175
Package	D2PAK	D2PAK	D2PAK	D2PAK	D2PAK	D2PAK
Product Status	Obsolete	Not For New Designs	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Active Transition):

IRFZ46NSTRLPBF is the direct parametric equivalent with identical electrical specifications. However, this part carries "Not For New Designs" status. Selection of this part is appropriate only for legacy system maintenance where design changes are not feasible.

For New Designs and Production:

STB55NF06LT4, STB55NF06T4, STB60NF06T4, and PSMN015-60BS,118 are all Active status parts with ROHS3 compliance and REACH unaffected certification. These parts are suitable for new designs and ongoing production.

Selection Hierarchy Based on Application Requirements:

STB60NF06T4 (STMicroelectronics): Highest current rating (60A) with 110W power dissipation and extended temperature range (-65°C to 175°C). Recommended for high-current applications requiring maximum thermal headroom.
STB55NF06LT4 (STMicroelectronics): Matches original 55A current rating with 95W power dissipation. Lowest gate charge (37 nC) reduces drive circuit complexity. Recommended for applications prioritizing gate drive efficiency.
STB55NF06T4 (STMicroelectronics): 50A current rating with 110W power dissipation. Moderate gate charge (60 nC). Recommended for balanced performance applications.
PSMN015-60BS,118 (Nexperia): 50A current rating with lowest gate charge (20.9 nC) and lowest input capacitance (1220 pF). Recommended for high-frequency switching applications requiring minimal drive power.

All recommended substitutes maintain D2PAK packaging compatibility, ±20V gate voltage rating, and -55°C to 175°C operating range (STB60NF06T4 extends to -65°C).

Frequently Asked Questions (FAQ)

Q1: Can IRFZ46NSTRLPBF directly replace IRFZ46NSTRRPBF?

A: Yes, electrically. Both parts have identical specifications: 55V Vdss, 53A Id, 16.5 mOhm Rds On, and 107W power dissipation. The only difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel). However, IRFZ46NSTRLPBF is marked "Not For New Designs," limiting its use to legacy system support.

Q2: Why do the STMicroelectronics and Nexperia substitutes have higher voltage ratings (60V vs. 55V)?

A: Higher voltage ratings provide design margin and improved reliability in applications with voltage transients or overshoot conditions. A 60V-rated device in a 55V application operates with additional safety margin without performance degradation. All other electrical parameters remain compatible with the original 55V specification.

Q3: What is the significance of gate charge differences among substitutes?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. Lower gate charge (PSMN015-60BS,118 at 20.9 nC) reduces drive circuit power consumption and enables faster switching. Higher gate charge (STB55NF06LT4 at 37 nC) requires more drive power but may offer other performance benefits. Selection depends on gate driver capability and switching frequency requirements.

Q4: Are all substitute parts compatible with existing PCB layouts designed for IRFZ46NSTRRPBF?

A: Yes. All substitute parts use D2PAK (TO-263-3) surface mount packaging with identical pin configuration and thermal tab placement. PCB layouts, footprints, and thermal management designs require no modification.

Q5: Which substitute is recommended for new product designs?

A: STB60NF06T4 is recommended for new designs due to Active product status, highest current rating (60A), superior power dissipation (110W), extended temperature range (-65°C to 175°C), and full ROHS3 compliance. This part provides maximum design flexibility and long-term supply availability.

Q6: What is the difference between Tape & Reel (TR) and Cut Tape & Digi-Reel (CT) packaging?

A: Tape & Reel is continuous reel packaging for automated assembly lines. Cut Tape & Digi-Reel is pre-cut tape on smaller reels for lower-volume applications or manual assembly. Electrical performance is identical; packaging format selection depends on production volume and assembly equipment.

Q7: Can PSMN015-60BS,118 replace IRFZ46NSTRRPBF in high-frequency applications?

A: Yes. PSMN015-60BS,118 has the lowest gate charge (20.9 nC) and input capacitance (1220 pF) among all substitutes, making it optimal for high-frequency switching. The 60V rating and 50A current rating are compatible with the original 55V/53A specification with design margin.

Q8: Are there thermal management differences between substitutes?

A: Yes. STB60NF06T4 and STB55NF06T4 offer 110W power dissipation versus 107W for the original part, providing improved thermal performance. PSMN015-60BS,118 provides 86W. Selection should account for application thermal requirements and heatsink design.

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