IXFE44N50QD2 Equivalent & Substitute Parts

Part Overview

The IXFE44N50QD2 is an N-Channel MOSFET rated for 500V drain-to-source voltage with 39A continuous drain current at 25°C. Manufactured by IXYS, this device features the HiPerFET™ series technology and is housed in a SOT-227B (miniBLOC) chassis mount package. The component is designed for high-voltage switching applications requiring robust thermal performance with 400W maximum power dissipation.

The IXFE44N50QD2 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this device.

Substiute Parts

IXFE44N50QD2

IXYSIn Stock: 1120IXFE44N50QD2 Datasheet

Current PartRFQ

STE48NM50

STMicroelectronicsIn Stock: 1678STE48NM50 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IXFE44N50QD2 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• FET Type: N-Channel topology must be maintained
• Drain to Source Voltage (Vdss): Substitute must equal or exceed 500V rating
• Continuous Drain Current (Id): Substitute must meet or exceed 39A at 25°C
• On-State Resistance (Rds On): Substitute must not exceed the thermal and switching performance envelope
• Power Dissipation: Substitute must support minimum 400W thermal capability
• Operating Temperature: Substitute must support -40°C to 150°C range

Mechanical Compatibility Criteria:

• Mounting Type: Chassis Mount configuration required
• Package Type: SOT-227B or equivalent footprint compatibility

The STE48NM50 from STMicroelectronics meets these substitution criteria through equivalent or superior electrical ratings and compatible chassis mount configuration.

Parameter Comparison

Engineering Selection Recommendations

STE48NM50 as Primary Substitute:

The STE48NM50 is suitable as a substitute for the IXFE44N50QD2 based on the following factors:

Electrical Performance: The STE48NM50 exceeds the minimum electrical requirements of the IXFE44N50QD2. It provides 550V Vdss (50V higher), 48A continuous drain current (9A higher), and 450W power dissipation (50W higher). The on-state resistance of 100 mOhm at 24A, 10V is lower than the IXFE44N50QD2 specification of 120 mOhm at 22A, 10V, indicating improved switching efficiency.

Regulatory Compliance: Both devices are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and use.

Product Status: The STE48NM50 is classified as active, ensuring ongoing availability and manufacturer support. The IXFE44N50QD2 is obsolete, making the STE48NM50 the appropriate long-term solution for design continuity.

Package Consideration: The STE48NM50 uses the ISOTOP® package while the IXFE44N50QD2 uses SOT-227B (miniBLOC). Both are chassis mount configurations. Physical footprint verification is required during design integration to confirm mechanical compatibility with existing PCB layouts and thermal management systems.

Frequently Asked Questions (FAQ)

Q: Can the STE48NM50 directly replace the IXFE44N50QD2 without circuit modifications?

A: The STE48NM50 meets or exceeds all critical electrical parameters of the IXFE44N50QD2. However, package differences (ISOTOP versus SOT-227B) require mechanical verification. PCB footprint, mounting hardware, and thermal interface compatibility must be confirmed before implementation.

Q: What are the key electrical advantages of the STE48NM50 over the IXFE44N50QD2?

A: The STE48NM50 provides higher voltage rating (550V vs. 500V), higher current capacity (48A vs. 39A), lower on-state resistance (100 mOhm vs. 120 mOhm), and higher power dissipation capability (450W vs. 400W). Additionally, gate charge is reduced (117 nC vs. 190 nC), and input capacitance is lower (3700 pF vs. 8000 pF), resulting in improved switching performance.

Q: Are there thermal management differences between these devices?

A: Both devices are rated for 150°C maximum junction temperature and support chassis mount configurations. The STE48NM50 provides 50W additional power dissipation capacity. Thermal interface materials and mounting pressure specifications must be verified for the ISOTOP package to ensure equivalent thermal performance to the original SOT-227B design.

Q: What is the significance of the lower gate charge in the STE48NM50?

A: Lower gate charge (117 nC vs. 190 nC) reduces gate drive power requirements and enables faster switching transitions. This results in lower switching losses and improved overall circuit efficiency, particularly in high-frequency applications.

Q: Are both devices suitable for the same voltage and current applications?

A: Yes. The STE48NM50 is rated for higher voltage (550V vs. 500V) and higher current (48A vs. 39A), making it suitable for applications requiring the IXFE44N50QD2 specifications. The superior ratings provide design margin and potential for application expansion.

Q: What compliance certifications apply to both devices?

A: Both the IXFE44N50QD2 and STE48NM50 are ROHS3 compliant and REACH unaffected. Both carry EAR99 ECCN classification and fall under HTSUS code 8541.29.0095. Moisture sensitivity level is 1 (unlimited) for both devices.