IXFR24N50 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IXFR24N50 is an N-Channel 500V, 24A MOSFET manufactured by IXYS in the HiPerFET™ series, housed in the ISOPLUS247™ package (TO-247-3). This device is classified as obsolete, necessitating identification of active substitute components for new designs and ongoing production requirements. The part operates across a temperature range of -55°C to 150°C and dissipates up to 250W at the case temperature. Substitute parts must maintain electrical and mechanical compatibility while accommodating the transition from obsolete to active product status.

Substiute Parts

IXFR24N50

IXYSIn Stock: 695IXFR24N50 Datasheet

Current PartRFQ

IXFR30N60P

IXYSIn Stock: 2427IXFR30N60P Datasheet

SimilarRFQ

STW19NM50N

STMicroelectronicsIn Stock: 2492STW19NM50N Datasheet

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STW20NK50Z

STMicroelectronicsIn Stock: 7836STW20NK50Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the IXFR24N50 is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Drain to Source Voltage (Vdss) must equal or exceed 500V
• Continuous Drain Current (Id) must support the application's current requirements
• On-State Resistance (Rds On) affects power dissipation and thermal performance
• Gate Threshold Voltage (Vgs(th)) must remain within compatible switching thresholds
• Gate Charge (Qg) influences gate drive circuit design
• Maximum Gate Voltage (Vgs) must accommodate the gate drive supply

Mechanical Compatibility Criteria:

• Package Type: TO-247-3 (ISOPLUS247™ equivalent)
• Mounting Type: Through Hole
• Pin configuration compatibility

Compliance Criteria:

• RoHS3 Compliance
• REACH Status: REACH Unaffected
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute parts identified (IXFR30N60P, STW19NM50N, STW20NK50Z) share the same package footprint and mounting type. Each substitute presents trade-offs in current rating, voltage rating, and power dissipation relative to the original part specification.

Parameter Comparison

Engineering Selection Recommendations

IXFR30N60P (IXYS)

The IXFR30N60P is an active IXYS product within the HiPerFET™ series, maintaining manufacturer continuity. This part features a higher Vdss rating (600V versus 500V), providing enhanced voltage margin. However, the continuous drain current is reduced to 15A, and maximum power dissipation decreases to 166W. The Rds On specification (250mOhm @ 15A, 10V) is comparable to the original part. Gate charge is significantly lower (85nC versus 160nC), reducing gate drive requirements. This substitute is suitable for applications where the 24A current requirement can be accommodated by parallel configurations or where lower current operation is acceptable.

STW19NM50N (STMicroelectronics)

The STW19NM50N maintains the 500V Vdss rating and is an active product from STMicroelectronics in the MDmesh™ II series. The continuous drain current is 14A, representing a 42% reduction from the original specification. Power dissipation is limited to 110W. Gate charge is substantially lower (34nC), offering significant advantages in gate drive circuit efficiency. Input capacitance is reduced to 1000pF, improving switching speed characteristics. This substitute is appropriate for lower-current applications or where gate drive efficiency is prioritized.

STW20NK50Z (STMicroelectronics)

The STW20NK50Z maintains the 500V Vdss rating and is an active product from STMicroelectronics in the SuperMESH™ series. The continuous drain current is 17A, representing a 29% reduction from the original specification. Power dissipation is 190W. Gate charge (119nC) is lower than the original part but higher than the STW19NM50N. Input capacitance is 2600pF. This substitute provides a balance between current capability and gate drive requirements, suitable for applications requiring moderate current levels at 500V.

All substitute parts maintain RoHS3 compliance, REACH unaffected status, and MSL 1 rating, ensuring regulatory and environmental compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can the IXFR24N50 be directly replaced with any of these substitutes in existing designs?

A: Direct replacement depends on application current requirements. The IXFR24N50 operates at 24A continuous drain current. The IXFR30N60P, STW19NM50N, and STW20NK50Z are rated at 15A, 14A, and 17A respectively. Applications requiring the full 24A rating cannot use these substitutes without circuit modification. Applications operating below the substitute current ratings support direct replacement with PCB layout verification.

Q: What are the package compatibility considerations?

A: All substitute parts use the TO-247-3 package with through-hole mounting, identical to the IXFR24N50. Pin configuration is compatible. PCB footprints require no modification. Thermal management considerations may differ due to varying power dissipation ratings.

Q: How do gate charge differences affect circuit design?

A: The IXFR24N50 specifies 160nC gate charge at 10V. The STW19NM50N (34nC) and STW20NK50Z (119nC) require proportionally lower gate drive energy. The IXFR30N60P (85nC) also reduces gate drive requirements. Lower gate charge reduces switching losses and simplifies gate drive circuit design. Existing gate drive circuits designed for 160nC operation remain functional with lower gate charge devices but operate with reduced margin.

Q: Are there voltage rating implications for 500V versus 600V devices?

A: The IXFR30N60P features a 600V Vdss rating compared to 500V for the original part and other substitutes. In 500V applications, the 600V device provides additional voltage margin and safety headroom. No circuit modification is required. Applications designed for 500V operation do not require the higher voltage rating but benefit from increased reliability margin.

Q: What thermal considerations apply when substituting these parts?

A: The IXFR24N50 dissipates up to 250W at case temperature. The IXFR30N60P (166W), STW19NM50N (110W), and STW20NK50Z (190W) have lower power dissipation ratings. Applications operating at the original part's full power dissipation require thermal management verification for substitute parts. Lower power dissipation may reduce heatsink requirements or allow operation at higher ambient temperatures.

Q: Do all substitutes maintain the same operating temperature range?

A: The IXFR24N50 and IXFR30N60P specify -55°C to 150°C operating temperature range. The STW19NM50N and STW20NK50Z datasheets specify 150°C maximum junction temperature. For applications requiring the full -55°C lower temperature limit, the IXFR30N60P is the appropriate substitute. The STMicroelectronics devices support standard industrial temperature ranges.

Q: What compliance certifications are maintained across all parts?

A: All parts (IXFR24N50, IXFR30N60P, STW19NM50N, STW20NK50Z) maintain RoHS3 compliance, REACH unaffected status, and MSL 1 (unlimited moisture sensitivity level). No compliance verification is required when substituting between these parts.