IXFX32N50 N-Channel MOSFET 500V 32A Equivalent & Substitute Parts

Part Overview

The IXFX32N50 is an N-Channel MOSFET manufactured by IXYS, rated for 500V drain-to-source voltage with 32A continuous drain current at 25°C. This device is part of the HiPerFET™ series and features a TO-247-3 through-hole package rated for 360W maximum power dissipation. The IXFX32N50 is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

IXFX32N50

IXYSIn Stock: 1981IXFX32N50 Datasheet

Current PartRFQ

APT37F50B

Microchip TechnologyIn Stock: 701APT37F50B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IXFX32N50 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Drain-to-Source Voltage (Vdss): Must equal or exceed 500V
• Continuous Drain Current (Id): Must equal or exceed 32A at 25°C
• On-State Resistance (Rds On): Must not exceed 150 mOhm at specified gate voltage
• Gate Threshold Voltage (Vgs(th)): Must be compatible with 10V drive voltage
• Operating Temperature Range: Must span -55°C to 150°C (TJ)

Mechanical Equivalence Criteria:

• Mounting Type: Through Hole required
• Package Type: TO-247-3 or equivalent TO-247 variant
• Moisture Sensitivity Level: MSL 1 (Unlimited)

The APT37F50B from Microchip Technology meets these substitution criteria with equal or superior electrical ratings and identical mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

APT37F50B as Primary Substitute:

The APT37F50B is the qualified substitute for the obsolete IXFX32N50. This selection is based on the following engineering factors:

Electrical Compatibility: The APT37F50B exceeds the minimum electrical requirements of the IXFX32N50 across all critical parameters. The continuous drain current rating of 37A exceeds the 32A requirement, providing operational margin. The on-state resistance of 150 mOhm at 18A, 10V matches the IXFX32N50 specification, ensuring equivalent switching performance. The maximum power dissipation of 520W exceeds the 360W rating of the original part, allowing for improved thermal headroom in applications.

Mechanical Compatibility: Both devices employ identical through-hole mounting and TO-247-3 package configurations, enabling direct physical substitution without PCB redesign or mechanical rework.

Compliance and Availability: The APT37F50B holds Active product status with 652 units in stock, ensuring supply chain continuity. The device is RoHS3 Compliant and REACH Unaffected, meeting current regulatory requirements. The IXFX32N50, classified as Obsolete, presents supply risk and regulatory uncertainty.

Thermal and Reliability Considerations: Both devices operate across the identical temperature range of -55°C to 150°C (TJ), with MSL 1 (Unlimited) moisture sensitivity ratings, ensuring equivalent reliability in field deployment.

Frequently Asked Questions (FAQ)

Q: Can the APT37F50B directly replace the IXFX32N50 without circuit modification?

A: Yes. The APT37F50B meets or exceeds all electrical specifications of the IXFX32N50 and shares identical mechanical packaging (TO-247-3 through-hole). Direct substitution is supported without circuit redesign.

Q: What is the significance of the higher continuous drain current rating (37A vs. 32A) in the APT37F50B?

A: The higher current rating provides operational margin and thermal headroom. In applications operating at or below 32A, the APT37F50B will experience lower junction temperatures and extended device lifetime compared to the IXFX32N50.

Q: Are there differences in gate charge between these devices?

A: Yes. The APT37F50B has a gate charge of 145 nC @ 10V, compared to 300 nC @ 10V for the IXFX32N50. The lower gate charge in the APT37F50B results in faster switching transitions and reduced gate drive power requirements.

Q: Why is the IXFX32N50 classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support. The IXFX32N50 is no longer available through standard distribution channels. The APT37F50B, with Active status, ensures long-term supply availability and manufacturer support.

Q: Are there compliance differences between the IXFX32N50 and APT37F50B?

A: The APT37F50B is explicitly RoHS3 Compliant and REACH Unaffected. The IXFX32N50 compliance status is not specified in available documentation. For applications requiring regulatory compliance certification, the APT37F50B is the appropriate selection.

Q: What is the maximum gate voltage for each device?

A: The IXFX32N50 is rated for ±20V maximum gate voltage, while the APT37F50B is rated for ±30V. Both devices operate with standard 10V drive voltage. The higher rating in the APT37F50B provides additional design margin for gate drive circuits.

Q: Do both devices have identical thermal characteristics?

A: Both devices operate across -55°C to 150°C (TJ) and share MSL 1 (Unlimited) ratings. The APT37F50B has a higher maximum power dissipation (520W vs. 360W), indicating improved thermal performance at equivalent current levels.

Q: Is PCB layout modification required when substituting the APT37F50B for the IXFX32N50?

A: No. Both devices use TO-247-3 through-hole packaging with identical pin configurations and mechanical footprints. Existing PCB layouts require no modification.