APT24M80B Equivalent & Substitute Parts

Part Overview

The APT24M80B is an N-Channel 800V 25A power MOSFET manufactured by Microchip Technology, housed in a TO-247 [B] through-hole package. This device is rated for 625W maximum power dissipation and operates across a temperature range of -55°C to 150°C. The part is currently in active product status with 1,098 units in stock.

Substitute parts are necessary when the APT24M80B becomes unavailable, when design requirements demand alternative electrical characteristics, or when supply chain constraints require qualified alternatives. The substitute parts listed maintain compatibility with the same mounting footprint and voltage class while offering variations in current rating, on-resistance, and gate charge characteristics.

Substiute Parts

APT24M80B

Microchip TechnologyIn Stock: 1157APT24M80B Datasheet

Current PartRFQ

AOK20N60L

Alpha & Omega Semiconductor Inc.In Stock: 8108AOK20N60L Datasheet

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IRFPC60PBF

Vishay SiliconixIn Stock: 1326IRFPC60PBF Datasheet

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IXFR32N80Q3

IXYSIn Stock: 1027IXFR32N80Q3 Datasheet

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IXFX27N80Q

IXYSIn Stock: 2069IXFX27N80Q Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the APT24M80B is determined by the following critical parameters:

Voltage Class Compatibility: All substitute parts must maintain the 800V Vdss rating to ensure safe operation in the same circuit topology. Parts with lower voltage ratings (600V) are listed as lower-voltage alternatives and require circuit re-evaluation.

Current Rating Tolerance: The APT24M80B is rated for 25A continuous drain current. Substitute parts with equal or higher current ratings (24A to 27A) provide direct functional equivalence. Parts with lower current ratings (16A to 20A) represent reduced-capacity alternatives.

On-Resistance (Rds On): This parameter directly affects power dissipation and thermal performance. Substitute parts with lower Rds On values improve efficiency; higher values increase heat generation.

Gate Charge (Qg): Lower gate charge enables faster switching and reduces driver power requirements. This parameter influences circuit performance but does not prevent substitution.

Mounting Package: All substitute parts use TO-247 or TO-247-3 variants, ensuring mechanical and thermal interface compatibility with the original footprint.

Product Status and Compliance: Active status parts are preferred for new designs. Obsolete parts (such as AOK20N60L) are available but not recommended for production applications. All listed parts maintain RoHS3 compliance and REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (800V Class, 24A–27A):

The IXFR32N80Q3 and IXFX27N80Q are the closest functional equivalents to the APT24M80B. Both maintain the 800V voltage rating and deliver current ratings within 1A of the original specification. Both parts are in active product status and carry full RoHS3 compliance. The IXFR32N80Q3 offers superior on-resistance (300 mOhm) compared to the APT24M80B (390 mOhm), resulting in lower power dissipation. The IXFX27N80Q provides the highest current rating (27A) among the 800V alternatives, with comparable on-resistance (320 mOhm). Both IXYS parts are suitable for direct substitution in new designs and production applications.

Lower-Voltage Alternatives (600V Class):

The AOK20N60L and IRFPC60PBF operate at 600V, representing a 200V reduction in voltage rating. These parts are suitable only for applications where the circuit topology and load conditions permit operation at reduced voltage margins. The AOK20N60L is obsolete and should not be selected for new production designs despite high inventory availability. The IRFPC60PBF is in active status but delivers only 16A continuous current, the lowest among all listed alternatives. This part is appropriate only for reduced-current applications.

Compliance and Availability:

All active-status parts (APT24M80B, IRFPC60PBF, IXFR32N80Q3, IXFX27N80Q) meet RoHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across global markets. The AOK20N60L, despite obsolete status, maintains full compliance certifications. For production applications, prioritize active-status parts to ensure long-term supply continuity and manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the IXFR32N80Q3 or IXFX27N80Q be used as direct drop-in replacements for the APT24M80B?

A: Yes, both IXYS parts maintain the 800V voltage rating and deliver equivalent or higher current ratings (24A and 27A respectively). Both use TO-247-3 compatible packages and operate across the same temperature range. Pin configuration compatibility must be verified against the specific circuit board layout, as package variants (ISOPLUS247™ and PLUS247™-3) may have minor dimensional differences from the standard TO-247 [B].

Q: Why are the 600V parts (AOK20N60L and IRFPC60PBF) listed as substitutes if they have lower voltage ratings?

A: These parts are listed as available alternatives for applications where circuit design permits operation at reduced voltage margins. The 200V reduction in Vdss represents a significant derating and is suitable only for specific topologies. The AOK20N60L is included for reference despite obsolete status; the IRFPC60PBF is an active alternative for reduced-current applications (16A maximum).

Q: What is the significance of the different package variants (TO-247 [B], ISOPLUS247™, PLUS247™-3)?

A: All variants are mechanically compatible with standard TO-247 footprints and maintain the same three-pin configuration (Gate, Drain, Source). Minor dimensional variations exist between variants, but thermal and electrical interfaces remain equivalent. PCB layout verification is recommended when switching between package variants to ensure proper lead alignment and thermal pad contact.

Q: Is the AOK20N60L suitable for new production designs?

A: No. The AOK20N60L carries obsolete product status, indicating end-of-life designation by the manufacturer. While 8,050 units are currently in stock, this part should not be selected for new production applications. Active-status alternatives (IXFR32N80Q3, IXFX27N80Q, IRFPC60PBF) provide assured long-term availability and manufacturer support.

Q: How do gate charge differences affect circuit performance?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. Lower gate charge (74 nC for AOK20N60L) reduces driver power requirements and enables faster switching. Higher gate charge (210 nC for IRFPC60PBF) increases driver demands but does not prevent substitution. The APT24M80B (150 nC) and IXYS parts (140–170 nC) fall within a moderate range suitable for standard gate driver circuits.

Q: What thermal considerations apply when substituting parts with different power dissipation ratings?

A: Power dissipation ratings reflect maximum thermal capacity under specified conditions. The APT24M80B is rated for 625W, while IXYS alternatives are rated for 500W. Lower power dissipation ratings indicate reduced thermal headroom. Thermal management design (heatsinking, PCB copper area) must accommodate the substitute part's maximum dissipation. Parts with lower on-resistance (IXFR32N80Q3 at 300 mOhm) generate less heat than the original (390 mOhm) under identical operating conditions.

Q: Are all listed parts RoHS3 compliant?

A: Yes. All parts listed—APT24M80B, AOK20N60L, IRFPC60PBF, IXFR32N80Q3, and IXFX27N80Q—carry RoHS3 compliance certification. All are also REACH unaffected. This ensures regulatory compatibility for applications subject to European Union environmental directives and equivalent global standards.