IXFE48N50QD2 Equivalent & Substitute Parts

Part Overview

The IXFE48N50QD2 is an N-Channel MOSFET rated for 500V drain-to-source voltage with 41A continuous drain current at 25°C. Manufactured by IXYS in the HiPerFET™ series, this device is housed in a SOT-227B (miniBLOC) chassis mount package and dissipates up to 400W. The part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

IXFE48N50QD2

IXYSIn Stock: 893IXFE48N50QD2 Datasheet

Current PartRFQ

STE48NM50

STMicroelectronicsIn Stock: 1678STE48NM50 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IXFE48N50QD2 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• FET Type: Must be N-Channel MOSFET
• Drain-to-Source Voltage (Vdss): Substitute must equal or exceed 500V
• Continuous Drain Current (Id): Substitute must meet or exceed 41A at 25°C
• On-State Resistance (Rds On): Lower or equivalent values ensure thermal performance
• Gate Charge (Qg): Lower values reduce switching losses
• Power Dissipation: Substitute must support minimum 400W thermal rating
• Operating Temperature: Substitute must support -40°C to 150°C range

Mechanical Compatibility Criteria:

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

The STE48NM50 from STMicroelectronics meets these substitution criteria with enhanced electrical performance in voltage rating, current capacity, and power dissipation, while maintaining chassis mount configuration and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

The STE48NM50 serves as a direct electrical substitute for the IXFE48N50QD2 with superior performance characteristics. The substitute device provides higher voltage rating (550V vs. 500V), increased current capacity (48A vs. 41A), and improved power dissipation capability (450W vs. 400W). On-state resistance is reduced (100mOhm vs. 110mOhm), and gate charge is significantly lower (117nC vs. 190nC), resulting in reduced switching losses.

Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The STE48NM50 carries active product status from STMicroelectronics, providing long-term availability and supply chain stability compared to the obsolete IXFE48N50QD2.

Package configuration differs between the two devices: the IXFE48N50QD2 uses SOT-227B (miniBLOC) while the STE48NM50 uses ISOTOP® package. Physical footprint and mounting interface verification is required prior to implementation in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the STE48NM50 directly replace the IXFE48N50QD2 without circuit modification?

A: Electrical substitution is valid based on parameter compatibility. The STE48NM50 meets or exceeds all critical electrical specifications including voltage rating, current capacity, and power dissipation. However, package configuration differs (ISOTOP® vs. SOT-227B), requiring mechanical and thermal interface assessment for the specific application.

Q: What are the key electrical advantages of the STE48NM50 over the IXFE48N50QD2?

A: The STE48NM50 provides higher drain-to-source voltage (550V vs. 500V), increased continuous drain current (48A vs. 41A), lower on-state resistance (100mOhm vs. 110mOhm), reduced gate charge (117nC vs. 190nC), and higher power dissipation rating (450W vs. 400W). These improvements result in lower conduction losses, reduced switching losses, and enhanced thermal performance.

Q: Are there thermal management differences between these devices?

A: Both devices support identical operating temperature ranges (-40°C to 150°C). The STE48NM50 provides higher power dissipation capability (450W vs. 400W) and lower on-state resistance, which may reduce thermal load in the application. Package type differences (ISOTOP® vs. SOT-227B) affect thermal interface design and mounting considerations.

Q: What is the impact of different gate charge specifications?

A: The STE48NM50 has significantly lower gate charge (117nC vs. 190nC at 10V). Lower gate charge reduces the energy required for switching transitions, decreasing switching losses and enabling faster switching speeds. This is particularly beneficial in high-frequency switching applications.

Q: Are both devices RoHS and REACH compliant?

A: Yes. Both the IXFE48N50QD2 and STE48NM50 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of the different input capacitance values?

A: The STE48NM50 has lower input capacitance (3700pF vs. 8000pF at 25V). Lower input capacitance reduces the capacitive load on the gate driver circuit, enabling faster switching transitions and reducing gate driver power consumption.

Q: Why is product status important for component selection?

A: The IXFE48N50QD2 is classified as obsolete, indicating discontinued production and limited long-term availability. The STE48NM50 carries active status, ensuring ongoing supply, technical support, and design continuity for new and existing applications.