IXFN48N50U2 Equivalent & Substitute Parts

Part Overview

The IXFN48N50U2 is an N-Channel MOSFET manufactured by IXYS, rated for 500V drain-to-source voltage with 48A continuous drain current at 25°C. This device is housed in a SOT-227B chassis mount package and is part of the HiPerFET™ series. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating package and mounting variations.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain to Source Voltage (Vdss)	500	V
Continuous Drain Current (Id) @ 25°C	48	A
On-State Resistance (Rds On Max) @ 10V	100	mOhm
Power Dissipation (Max)	520	W
Gate Charge (Qg Max) @ 10V	270	nC
Operating Temperature Range	-40 to 150	°C
Mounting Type	Chassis Mount	—
Package Type	SOT-227-4, miniBLOC	—

Substitute Part Grouping Explanation

Substitution of the IXFN48N50U2 is determined by the following critical electrical and mechanical parameters:

Voltage Rating: All substitute parts must maintain a minimum Vdss of 500V to ensure safe operation in the original application. The STE48NM50 exceeds this requirement at 550V, which is acceptable for voltage-rated applications.

Continuous Drain Current: The original part specifies 48A at 25°C. Substitute parts with lower current ratings (41A for APT5010 variants) represent reduced current capacity and are suitable only for applications where the full 48A is not required. The STE48NM50 maintains the 48A specification.

On-State Resistance: All substitute parts maintain the 100 mOhm maximum specification at 10V gate drive, ensuring equivalent switching losses and thermal performance in the specified operating range.

Power Dissipation: The original part dissipates 520W maximum. Substitute parts with lower power ratings (378W to 450W) indicate reduced thermal capacity and must be evaluated against actual application thermal requirements.

Gate Charge: The original part specifies 270 nC at 10V. Substitute parts with lower gate charge values (96 nC to 117 nC) indicate faster switching characteristics and reduced gate drive requirements.

Package and Mounting: The original part uses SOT-227B chassis mount. Substitute parts use SOT-227 or ISOTOP® packages, all supporting chassis mount configurations. Physical mounting compatibility must be verified for each application.

Product Status and Compliance: Active substitute parts with RoHS3 compliance and REACH unaffected status are preferred for new designs and long-term availability.

Parameter Comparison

Parameter	IXFN48N50U2	APT5010JVRU2	APT5010JLLU2	APT5010JLLU3	STE48NM50
Manufacturer	IXYS	Microchip Technology	Microchip Technology	Microchip Technology	STMicroelectronics
Vdss (V)	500	500	500	500	550
Id @ 25°C (A)	48	44	41	41	48
Rds On Max @ 10V (mOhm)	100	100	100	100	100
Power Dissipation Max (W)	520	450	378	378	450
Gate Charge @ 10V (nC)	270	312	96	96	117
Vgs Max (V)	±20	±30	±30	±30	±30
Ciss Max @ 25V (pF)	8400	7410	4360	4360	3700
Operating Temperature (°C)	-40 to 150	-55 to 150	-55 to 150	-55 to 150	to 150
Package	SOT-227B	SOT-227	SOT-227	SOT-227	ISOTOP®
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Current Replacement (48A Applications)

The STE48NM50 from STMicroelectronics is the primary substitute for applications requiring the full 48A continuous drain current specification. This part maintains electrical equivalence with the original IXFN48N50U2 across current and voltage ratings. The STE48NM50 is active in production, RoHS3 compliant, and available in volume. The ISOTOP® package provides equivalent chassis mount capability to the original SOT-227B. Gate charge is reduced to 117 nC, enabling faster switching with lower gate drive power requirements.

For Reduced Current Applications (41A to 44A)

The APT5010JVRU2 (44A) and APT5010JLLU2/APT5010JLLU3 (41A) from Microchip Technology are suitable for applications where continuous drain current requirements are 44A or below. These parts are active in production and RoHS3 compliant. The APT5010JVRU2 provides the closest current match at 44A with 450W power dissipation. The APT5010JLLU variants offer the lowest gate charge (96 nC) and input capacitance (4360 pF), resulting in minimal gate drive requirements and fastest switching response. All Microchip variants use SOT-227 packaging with chassis mount configuration.

Compliance and Availability

All substitute parts carry REACH unaffected status and EAR99 ECCN classification, matching the original part's regulatory profile. Moisture sensitivity level remains at MSL 1 (Unlimited) across all options. Active product status for all substitute parts ensures long-term availability and supply chain stability compared to the obsolete IXFN48N50U2.

Frequently Asked Questions (FAQ)

Q: Can the APT5010JLLU2 or APT5010JLLU3 replace the IXFN48N50U2 in all applications?

A: The APT5010JLLU variants are suitable only for applications where continuous drain current does not exceed 41A. These parts are not direct replacements for applications requiring the full 48A specification. Verify actual application current requirements before selection.

Q: What is the difference between APT5010JLLU2 and APT5010JLLU3?

A: Both parts are electrically identical with 41A continuous drain current, 500V Vdss, and 100 mOhm Rds On. The primary difference is series designation: APT5010JLLU2 has no series designation, while APT5010JLLU3 is part of the POWER MOS 7® series. Both are active products with RoHS3 compliance.

Q: Why does the STE48NM50 have a higher Vdss rating (550V) than the original part (500V)?

A: Higher voltage ratings provide additional safety margin in applications with voltage transients or overshoot conditions. The 550V rating does not affect compatibility with 500V-rated applications; the part operates safely at or below its rated voltage.

Q: Are the SOT-227 and SOT-227B packages physically compatible?

A: Both SOT-227 and SOT-227B are miniBLOC chassis mount packages with similar mechanical dimensions and mounting interfaces. Physical compatibility must be verified against specific PCB layout and heatsink mounting requirements for each application.

Q: What is the impact of lower gate charge in substitute parts?

A: Lower gate charge (96 nC to 117 nC versus 270 nC in the original) reduces the charge that must be supplied by the gate driver circuit. This results in faster switching transitions, lower gate drive power dissipation, and reduced electromagnetic interference. Gate driver circuits designed for the original part will operate with improved performance using substitute parts with lower gate charge.

Q: Can the ISOTOP® package (STE48NM50) be used interchangeably with SOT-227 packages?

A: ISOTOP® and SOT-227 are different package types with different mechanical and thermal characteristics. While both support chassis mount configurations, PCB layout, heatsink mounting, and thermal interface requirements differ. Physical compatibility must be verified for each application before substitution.

Q: Which substitute part offers the best thermal performance?

A: The STE48NM50 maintains the highest power dissipation capability at 450W while delivering 48A continuous current. For applications with reduced current requirements, the APT5010JVRU2 provides 450W dissipation at 44A. The APT5010JLLU variants are rated for 378W at 41A and are suitable only for lower-power applications.

Q: Are all substitute parts suitable for new design implementations?

A: All substitute parts carry active product status and RoHS3 compliance, making them suitable for new designs. The STE48NM50 is recommended for new designs requiring 48A continuous current. Microchip APT5010 variants are recommended for new designs with reduced current requirements or where lower gate charge and input capacitance provide design advantages.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message