IXFR80N20Q Equivalent & Substitute Parts

Part Overview

The IXFR80N20Q is an N-Channel MOSFET manufactured by IXYS, rated for 200V drain-to-source voltage with 71A continuous drain current at 25°C. This device is packaged in the ISOPLUS247™ form factor and belongs to the HiPerFET™ series. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for design continuity and procurement planning. Substitute parts must maintain compatibility across critical electrical parameters including voltage rating, current capacity, and thermal characteristics while accommodating available packaging options.

Substiute Parts

IXFR80N20Q

IXYSIn Stock: 1065IXFR80N20Q Datasheet

Current PartRFQ

STW75NF20

STMicroelectronicsIn Stock: 1453STW75NF20 Datasheet

SimilarRFQ

STY105NM50N

STMicroelectronicsIn Stock: 1673STY105NM50N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IXFR80N20Q is determined by the following critical parameters:

Voltage Rating Compatibility: All substitute parts must maintain a Vdss rating equal to or greater than 200V to ensure safe operation in the original circuit topology.

Current Capacity: Substitute parts must support continuous drain current (Id) at or above 71A at 25°C to meet or exceed the original device's current-handling capability.

On-State Resistance (Rds On): The on-state resistance at the specified gate-source voltage (10V) must be compatible with the thermal and efficiency requirements of the application. Lower Rds On values indicate improved performance characteristics.

Thermal Performance: Power dissipation rating and operating temperature range must support the thermal environment of the target application.

Packaging and Mounting: All substitute parts are specified for through-hole mounting in TO-247-3 or compatible package formats to ensure mechanical and electrical compatibility with existing PCB layouts.

The two substitute parts identified—STW75NF20 and STY105NM50N—satisfy these criteria with the following distinctions:

STW75NF20 maintains the 200V voltage rating with 75A current capacity, representing a direct voltage-class equivalent with enhanced current handling.

STY105NM50N provides a higher voltage rating (500V) with increased current capacity (110A), suitable for applications requiring additional voltage margin or higher current demands.

Parameter Comparison

Engineering Selection Recommendations

STW75NF20 Selection Criteria:

The STW75NF20 is classified as an active product with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory alignment. This part maintains the 200V voltage rating of the original IXFR80N20Q while providing 75A continuous drain current, exceeding the original 71A specification. The TO-247-3 package format ensures direct mechanical compatibility with existing PCB designs. The STW75NF20 is suitable for applications where the 200V voltage class is a design requirement and where the increased current capacity provides operational margin.

STY105NM50N Selection Criteria:

The STY105NM50N is an active product with ROHS3 compliance and REACH unaffected status. This part operates at 500V, providing a higher voltage margin than the original 200V rating. With 110A continuous drain current and superior on-state resistance characteristics (22 mOhm), this device is suitable for applications requiring enhanced voltage headroom or higher current demands. The TO-247-3 package maintains mechanical compatibility. Selection of this part is appropriate when circuit topology permits higher voltage operation or when thermal performance improvements are beneficial.

Both substitute parts are active products with current manufacturing support, contrasting with the obsolete status of the IXFR80N20Q. Regulatory compliance certifications (ROHS3, REACH) are provided for both substitutes, supporting compliance requirements in regulated markets.

Frequently Asked Questions (FAQ)

Q: Can the STW75NF20 be used as a direct replacement for the IXFR80N20Q?

A: The STW75NF20 maintains the same 200V voltage rating and exceeds the 71A current specification with 75A capability. Both devices use the TO-247-3 package format. Electrical compatibility is established across the critical parameters. Verification of circuit-specific requirements such as gate drive characteristics and thermal management is necessary for final design validation.

Q: What is the primary difference between the STW75NF20 and STY105NM50N substitutes?

A: The STW75NF20 maintains the 200V voltage class of the original part with 75A current capacity. The STY105NM50N operates at 500V with 110A current capacity and lower on-state resistance (22 mOhm versus 34 mOhm). Selection depends on whether the application requires the original 200V rating or can benefit from higher voltage operation.

Q: Are both substitute parts available in the same package as the IXFR80N20Q?

A: Yes. The IXFR80N20Q uses the ISOPLUS247™ package, which is mechanically and electrically equivalent to the TO-247-3 standard package format. Both substitute parts are specified in TO-247-3 packaging, ensuring compatibility with existing through-hole PCB layouts.

Q: What is the significance of the obsolete status of the IXFR80N20Q?

A: Obsolete status indicates that the manufacturer has discontinued production. Both identified substitutes are classified as active products with current manufacturing support, ensuring long-term availability for new designs and production continuity.

Q: How do the power dissipation ratings compare between the three parts?

A: The IXFR80N20Q is rated for 310W maximum power dissipation. The STW75NF20 is rated for 190W, while the STY105NM50N is rated for 625W. Power dissipation in the application depends on the actual operating current and on-state resistance. The STY105NM50N provides the highest thermal capacity.

Q: Are there compliance or regulatory differences between the substitute parts?

A: Both substitute parts carry ROHS3 compliance and REACH unaffected status. The original IXFR80N20Q does not specify these certifications. For applications in regulated markets requiring ROHS3 compliance, both substitutes satisfy these requirements.

Q: What parameters should be verified when selecting a substitute?

A: Critical parameters include drain-to-source voltage (Vdss) rating, continuous drain current (Id) at 25°C, on-state resistance (Rds On) at the specified gate-source voltage, power dissipation capability, operating temperature range, and package compatibility. Gate charge (Qg) and input capacitance (Ciss) may affect gate drive circuit design and should be reviewed for the specific application.