IRFS4620PBF N-Channel MOSFET 200V 24A Equivalent & Substitute Parts

Part Overview

The IRFS4620PBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 200V drain-to-source voltage and 24A continuous drain current in a D2PAK surface mount package. This device is part of the HEXFET® series and is classified as discontinued at DiGi Electronics. Due to its discontinued status, equivalent substitute parts from active product lines are necessary for ongoing design support and procurement continuity. The substitute parts listed maintain electrical compatibility within the specified parameter ranges while offering active availability and extended product support.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	200	V
Continuous Drain Current (Id) @ 25°C	24	A
On-State Resistance (Rds On) @ 15A, 10V	77.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 100µA	5	V
Gate Charge (Qg) @ 10V	38	nC
Power Dissipation (Max)	144	W
Operating Temperature Range	-55 to 175	°C
Package Type	D2PAK (TO-263-3)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution eligibility for the IRFS4620PBF is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 200V
Package Type: Must be D2PAK (TO-263-3) for mechanical and thermal compatibility
Mounting Type: Must be Surface Mount
FET Type: Must be N-Channel MOSFET
Technology: Must be Metal Oxide (MOSFET)

Performance Parameters (Allowable Ranges):

Continuous Drain Current (Id): Substitute must meet or exceed 24A at 25°C
On-State Resistance (Rds On): Lower or equal values are acceptable
Gate Threshold Voltage (Vgs(th)): Must be within ±20V maximum gate voltage specification
Gate Charge (Qg): Values within the specified range maintain switching characteristics
Power Dissipation: Must support thermal requirements of the application
Operating Temperature: Must cover the -55°C to 175°C range or be suitable for the intended application temperature window

All three substitute parts (STB30NF20, STB30NF20L, STB40NF20) meet these mandatory criteria and are therefore electrically and mechanically compatible with the IRFS4620PBF in D2PAK applications.

Parameter Comparison

Parameter	IRFS4620PBF	STB30NF20	STB30NF20L	STB40NF20	Unit
Manufacturer	Infineon	STMicroelectronics	STMicroelectronics	STMicroelectronics	—
Vdss	200	200	200	200	V
Id @ 25°C	24	30	30	40	A
Rds On (Max) @ 10V	77.5 @ 15A	75 @ 15A	75 @ 15A	45 @ 20A	mOhm
Vgs(th) (Max)	5 @ 100µA	4 @ 250µA	3 @ 250µA	4 @ 250µA	V
Qg (Max) @ 10V	38	38	65	75	nC
Ciss (Max)	1710 @ 50V	1597 @ 25V	1990 @ 25V	2500 @ 25V	pF
Power Dissipation (Max)	144	125	150	160	W
Operating Temperature	-55 to 175	-55 to 150	-55 to 175	-55 to 150	°C
Package	D2PAK	D2PAK	D2PAK	D2PAK	—
Product Status	Discontinued	Active	Active	Active	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

STB30NF20 (STMicroelectronics STripFET™ Series)

The STB30NF20 is an active product offering 30A continuous drain current with 200V Vdss in D2PAK packaging. This part provides a 25% increase in current rating over the IRFS4620PBF while maintaining equivalent on-state resistance characteristics (75mOhm vs. 77.5mOhm). The operating temperature range extends to 150°C maximum, which is 25°C lower than the IRFS4620PBF. This substitute is suitable for applications where the higher current capacity provides design margin and the temperature limitation does not conflict with system requirements.

STB30NF20L (STMicroelectronics STripFET™ Series, Automotive Grade)

The STB30NF20L is an active product qualified to AEC-Q101 automotive standards with 30A continuous drain current and 200V Vdss. This part maintains the full -55°C to 175°C operating temperature range of the IRFS4620PBF and provides higher power dissipation capability (150W vs. 144W). The lower gate threshold voltage (3V vs. 5V) and higher gate charge (65nC vs. 38nC) reflect optimized switching characteristics for automotive applications. This substitute is appropriate for designs requiring automotive-grade qualification and extended temperature operation.

STB40NF20 (STMicroelectronics STripFET™ Series)

The STB40NF20 is an active product offering 40A continuous drain current with 200V Vdss in D2PAK packaging. This part provides a 67% increase in current rating and significantly lower on-state resistance (45mOhm vs. 77.5mOhm), resulting in reduced power dissipation in high-current applications. The operating temperature range extends to 150°C maximum. This substitute is suitable for applications requiring higher current capacity and improved thermal efficiency, provided the 150°C maximum temperature limit is acceptable.

Compliance and Regulatory Status

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification consistent with the IRFS4620PBF. All parts are classified as Moisture Sensitivity Level 1 (Unlimited). Selection among the three substitutes should be based on application-specific requirements for current rating, operating temperature range, and automotive qualification status.

Frequently Asked Questions (FAQ)

Q: Can STB30NF20, STB30NF20L, and STB40NF20 be used interchangeably with IRFS4620PBF in existing designs?

A: All three substitute parts share the same D2PAK package, 200V Vdss rating, and N-Channel MOSFET technology. They are mechanically and electrically compatible for PCB layout and circuit operation. However, differences in current rating, on-state resistance, gate charge, and operating temperature range must be evaluated against specific application requirements. No circuit modifications are required for package compatibility.

Q: What is the primary difference between STB30NF20 and STB30NF20L?

A: Both parts offer 30A continuous drain current and 200V Vdss. The STB30NF20L is automotive-grade (AEC-Q101 qualified) with extended operating temperature range (-55°C to 175°C vs. -55°C to 150°C), higher power dissipation capability (150W vs. 125W), lower gate threshold voltage (3V vs. 4V), and higher gate charge (65nC vs. 38nC). Selection depends on whether automotive qualification and full temperature range operation are required.

Q: Why does STB40NF20 have lower on-state resistance than the other substitutes?

A: The STB40NF20 is rated for 40A continuous drain current, compared to 24A for IRFS4620PBF and 30A for STB30NF20 variants. Higher current-rated MOSFETs typically feature larger die areas and optimized channel geometry, resulting in lower on-state resistance (45mOhm vs. 77.5mOhm). This characteristic reduces conduction losses in high-current applications.

Q: Are there thermal considerations when substituting these parts?

A: Yes. The IRFS4620PBF is rated for 144W power dissipation at Tc. STB30NF20 is rated for 125W, STB30NF20L for 150W, and STB40NF20 for 160W. Applications operating near the thermal limits of the original design must verify that substitute part thermal ratings are adequate. The lower on-state resistance of STB40NF20 may reduce thermal load in high-current circuits.

Q: What is the impact of different gate charge values on circuit design?

A: Gate charge (Qg) affects gate drive circuit requirements and switching speed. IRFS4620PBF has 38nC gate charge. STB30NF20 matches this at 38nC, while STB30NF20L has 65nC and STB40NF20 has 75nC. Higher gate charge requires longer switching times or higher gate drive current. Existing gate drive circuits designed for 38nC may require verification or adjustment for parts with higher gate charge values.

Q: Can these parts be used in applications requiring the full -55°C to 175°C temperature range?

A: IRFS4620PBF and STB30NF20L both support -55°C to 175°C operation. STB30NF20 and STB40NF20 are limited to -55°C to 150°C. Applications requiring operation above 150°C must use either the original IRFS4620PBF or STB30NF20L.

Q: Are all substitute parts available in the same packaging options as IRFS4620PBF?

A: All substitute parts are supplied in D2PAK (TO-263-3) surface mount packaging, identical to IRFS4620PBF. STB30NF20, STB30NF20L, and STB40NF20 are available in Cut Tape (CT) and Digi-Reel® packaging formats. No package conversion or adapter components are required for direct substitution.

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