IRFS38N20DTRLP N-Channel 200V 43A MOSFET Equivalent & Substitute Parts

Part Overview

The IRFS38N20DTRLP is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 200V drain-to-source voltage with 43A continuous drain current at 25°C. This device is part of the HEXFET® series and is housed in a D2PAK (TO-263-3) surface mount package. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance can be maintained across critical parameters including drain-to-source voltage rating, continuous drain current capability, on-resistance characteristics, and thermal performance within the same D2PAK package family. Substitution eligibility is determined by matching or exceeding the specified electrical parameters while maintaining compatible packaging and operating temperature ranges.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	200	V
Continuous Drain Current (Id) @ 25°C	43	A (Tc)
On-Resistance (Rds On Max) @ 26A, 10V	54	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	5	V
Gate Charge (Qg Max) @ 10V	91	nC
Input Capacitance (Ciss Max) @ 25V	2900	pF
Power Dissipation (Max)	3.8 (Ta), 300 (Tc)	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

Substitute parts for the IRFS38N20DTRLP are qualified based on the following critical parameters:

Voltage Rating Requirement: All substitute parts must maintain a Drain-to-Source Voltage (Vdss) rating of 200V, matching the primary device specification.

Current Capability: Substitute parts must provide continuous drain current (Id) at 25°C equal to or greater than 43A (Tc). Parts with higher current ratings (48A, 50A, 52A) are acceptable as they provide enhanced current handling capacity.

On-Resistance (Rds On): The maximum on-resistance specification at rated conditions determines switching losses and thermal performance. Substitute parts with equal or lower Rds On values maintain or improve efficiency characteristics.

Package Compatibility: All qualified substitutes use the D2PAK (TO-263-3) surface mount package, ensuring mechanical and thermal interface compatibility with existing PCB designs.

Operating Temperature Range: Substitute parts must support the operating temperature range of -55°C to 175°C (TJ), or a subset thereof that covers the application requirements.

Compliance & Certifications: All substitute parts maintain RoHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity level, ensuring regulatory and environmental compatibility.

The following five substitute parts meet these criteria and are listed in order of electrical equivalence and availability.

Parameter Comparison

Parameter	IRFS38N20DTRLP (Main)	FDB52N20TM	IXTA48N20T	IXTA50N20P	PSMN057-200B,118	STB40NF20
Manufacturer	Infineon	onsemi	IXYS	IXYS	Nexperia USA Inc.	STMicroelectronics
Vdss (V)	200	200	200	200	200	200
Id @ 25°C (A, Tc)	43	52	48	50	39	40
Rds On Max (mOhm)	54 @ 26A, 10V	49 @ 26A, 10V	50 @ 24A, 10V	60 @ 50A, 10V	57 @ 17A, 10V	45 @ 20A, 10V
Vgs(th) Max (V)	5 @ 250µA	5 @ 250µA	4.5 @ 250µA	5 @ 250µA	4 @ 1mA	4 @ 250µA
Qg Max (nC) @ 10V	91	63	60	70	96	75
Ciss Max (pF) @ 25V	2900	2900	3090	2720	3750	2500
Power Dissipation Max (W, Tc)	300	357	250	360	250	160
Operating Temp Range (°C, TJ)	-55 to 175	-55 to 150	-55 to 175	-55 to 175	-55 to 175	-55 to 150
Package	D2PAK (TO-263-3)	TO-263 (D2PAK)	TO-263AA	TO-263AA	D2PAK (TO-263-3)	D2PAK (TO-263-3)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

FDB52N20TM (onsemi UniFET™ Series)

The FDB52N20TM provides the highest continuous drain current rating at 52A with improved on-resistance of 49mOhm, delivering superior current handling and reduced switching losses compared to the IRFS38N20DTRLP. Gate charge is reduced to 63nC, improving gate drive efficiency. Operating temperature range extends to 150°C maximum. This part is suitable for applications requiring enhanced current capacity and thermal performance. Inventory availability is 5845 units.

IXTA48N20T (IXYS Trench Series)

The IXTA48N20T offers 48A continuous drain current with 50mOhm on-resistance and maintains the full operating temperature range of -55°C to 175°C. Gate charge is 60nC with lower input capacitance of 3090pF. This part provides balanced electrical performance with extended temperature capability. Inventory availability is 1162 units.

IXTA50N20P (IXYS Polar Series)

The IXTA50N20P delivers 50A continuous drain current with 360W power dissipation capability and maintains full operating temperature range to 175°C. On-resistance is 60mOhm at 50A. This part is suitable for high-current applications with extended thermal headroom. Inventory availability is 1010 units.

PSMN057-200B,118 (Nexperia TrenchMOS™ Series)

The PSMN057-200B,118 provides 39A continuous drain current with 57mOhm on-resistance. Gate threshold voltage is lower at 4V, and operating temperature extends to 175°C. This part is suitable for applications where the lower current rating is acceptable and lower gate threshold is beneficial. Inventory availability is 11197 units.

STB40NF20 (STMicroelectronics STripFET™ Series)

The STB40NF20 offers 40A continuous drain current with the lowest on-resistance at 45mOhm, providing superior efficiency. Operating temperature range is limited to 150°C maximum. This part is suitable for efficiency-critical applications where the temperature limitation is acceptable. Inventory availability is 1267 units.

All substitute parts maintain RoHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity level, ensuring full regulatory and environmental compatibility with the primary device.

Frequently Asked Questions (FAQ)

Q: What are the primary criteria for substituting the IRFS38N20DTRLP?

A: Substitution is based on matching the 200V drain-to-source voltage rating, providing equal or greater continuous drain current (43A minimum), maintaining compatible on-resistance characteristics, and using the same D2PAK surface mount package. All substitute parts must maintain RoHS3 compliance and MSL 1 moisture sensitivity level.

Q: Can I use a substitute part with lower continuous drain current rating?

A: No. The PSMN057-200B,118 with 39A rating and STB40NF20 with 40A rating are below the primary device specification of 43A. These parts are listed as cross-references but do not meet the minimum current requirement for direct substitution in applications requiring the full 43A capability.

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

A: On-resistance (Rds On) directly determines conduction losses and heat generation. Lower on-resistance values reduce power dissipation and improve efficiency. The STB40NF20 offers the lowest on-resistance at 45mOhm, while the IXTA50N20P has the highest at 60mOhm. Selection depends on thermal budget and efficiency requirements.

Q: Are all substitute parts available in the same package?

A: All substitute parts use D2PAK or TO-263AA packages, which are mechanically and thermally compatible with the IRFS38N20DTRLP. The D2PAK and TO-263-3 designations refer to the same physical package format suitable for direct PCB replacement.

Q: What is the difference between operating temperature ranges?

A: The IRFS38N20DTRLP, IXTA48N20T, IXTA50N20P, and PSMN057-200B,118 support -55°C to 175°C. The FDB52N20TM and STB40NF20 are limited to -55°C to 150°C. If your application requires operation above 150°C, select from the first group.

Q: How do gate charge differences impact my gate driver design?

A: Gate charge (Qg) determines the energy required to switch the MOSFET. Lower values reduce gate drive power and switching losses. The IXTA48N20T has the lowest gate charge at 60nC, while the PSMN057-200B,118 has the highest at 96nC. Verify your gate driver can supply the required charge for your selected substitute.

Q: Which substitute offers the best thermal performance?

A: The IXTA50N20P and FDB52N20TM offer the highest power dissipation ratings at 360W and 357W respectively, providing superior thermal headroom. The STB40NF20 is limited to 160W. Selection depends on your thermal management capability and heat sink design.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity level, ensuring full regulatory and environmental compatibility with the primary device.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message