APT50M65B2FLLG Equivalent & Substitute Parts

Part Overview

The APT50M65B2FLLG is an N-Channel 500V 67A MOSFET manufactured by Microchip Technology in the POWER MOS 7® series. This device is housed in a TO-247-3 variant package (T-MAX™ [B2]) and is designed for through-hole mounting applications requiring high-voltage switching capability. The part is currently in active production status with 1055 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

APT50M65B2FLLG

Microchip TechnologyIn Stock: 1156APT50M65B2FLLG Datasheet

Current PartRFQ

IXFX80N50Q3

IXYSIn Stock: 2255IXFX80N50Q3 Datasheet

SimilarRFQ

IXFX98N50P3

IXYSIn Stock: 1540IXFX98N50P3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the APT50M65B2FLLG is determined by strict equivalence in the following critical parameters:

Mandatory Equivalence Criteria:

• Drain to Source Voltage (Vdss): 500V
• Package Type: TO-247-3 Variant (through-hole mounting)
• Mounting Type: Through Hole
• Gate Voltage Range: ±30V maximum
• Operating Temperature Range: -55°C to 150°C
• Technology: N-Channel MOSFET (Metal Oxide)
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

Allowable Parameter Variations: Substitute parts may exceed the following parameters without loss of functional compatibility:

• Continuous Drain Current (Id): Equal to or greater than 67A
• Power Dissipation (Max): Equal to or greater than 694W
• Rds On (Max): Equal to or less than 65 mOhm (lower on-resistance is acceptable)
• Gate Charge (Qg): Equal to or less than 141 nC (lower gate charge is acceptable)
• Input Capacitance (Ciss): May vary within device-specific design parameters

The identified substitute parts IXFX80N50Q3 and IXFX98N50P3 meet all mandatory equivalence criteria and provide enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

APT50M65B2FLLG (Primary Part)

The APT50M65B2FLLG is the specified component and remains the primary selection when available. This part is manufactured by Microchip Technology, carries active product status, and maintains full compliance with ROHS3 and REACH requirements. The device is currently in stock with 1055 units available. Selection of this part ensures design continuity and adherence to original specifications.

IXFX80N50Q3 (First Substitute)

The IXFX80N50Q3 is manufactured by IXYS and qualifies as a direct substitute based on electrical and mechanical equivalence. This device provides 80A continuous drain current (compared to 67A in the main part), representing a 19% increase in current capacity. Power dissipation capability is 1250W versus 694W in the original part. The on-resistance specification remains equivalent at 65 mOhm. This part carries ROHS3 compliance, MSL 1 rating, and REACH Unaffected status. Inventory availability is 2200 units. The IXFX80N50Q3 is suitable for applications where increased current margin is beneficial.

IXFX98N50P3 (Second Substitute)

The IXFX98N50P3 is manufactured by IXYS and qualifies as a direct substitute based on electrical and mechanical equivalence. This device provides 98A continuous drain current (compared to 67A in the main part), representing a 46% increase in current capacity. Power dissipation capability is 1300W versus 694W in the original part. The on-resistance specification is improved at 50 mOhm (compared to 65 mOhm in the main part). This part carries ROHS3 compliance, MSL 1 rating, and REACH Unaffected status. Inventory availability is 1446 units. The IXFX98N50P3 is suitable for applications requiring maximum current capacity and lowest on-resistance within the 500V class.

All three parts share identical voltage ratings, package types, temperature ranges, and regulatory compliance status. Selection between these parts is determined by application requirements for current capacity and thermal performance.

Frequently Asked Questions (FAQ)

Q: Can the IXFX80N50Q3 or IXFX98N50P3 be used as direct replacements for the APT50M65B2FLLG in existing designs?

A: Yes. Both IXYS devices are electrically and mechanically compatible with the APT50M65B2FLLG. All three parts share identical 500V drain-source voltage ratings, TO-247-3 package configurations, through-hole mounting, ±30V gate voltage ratings, and -55°C to 150°C operating temperature ranges. The substitute parts provide equal or superior electrical performance in all critical parameters.

Q: What are the key differences between the three parts?

A: The primary differences are continuous drain current capacity and power dissipation. The APT50M65B2FLLG is rated for 67A and 694W. The IXFX80N50Q3 provides 80A and 1250W. The IXFX98N50P3 provides 98A and 1300W. The IXFX98N50P3 also features lower on-resistance at 50 mOhm compared to 65 mOhm in the other two parts. Gate charge specifications differ slightly, with the APT50M65B2FLLG at 141 nC, IXFX80N50Q3 at 200 nC, and IXFX98N50P3 at 197 nC.

Q: Are there any package compatibility concerns when substituting these parts?

A: No. All three parts use TO-247-3 variant packages with through-hole mounting. The T-MAX™ [B2] package (Microchip) and PLUS247™-3 packages (IXYS) are mechanically and electrically compatible in TO-247-3 footprints. Pin configurations and lead spacing are identical.

Q: Do all three parts meet the same regulatory and compliance standards?

A: Yes. All three parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity ratings, have REACH Unaffected status, and are classified under ECCN EAR99. Regulatory compliance is equivalent across all three devices.

Q: What is the significance of the higher gate charge in the IXYS parts?

A: The IXFX80N50Q3 and IXFX98N50P3 have gate charge values of 200 nC and 197 nC respectively, compared to 141 nC in the APT50M65B2FLLG. Higher gate charge requires more energy to switch the device and may result in slightly longer switching times. This parameter is relevant only in high-frequency switching applications where gate drive circuit design is critical.

Q: Which substitute part should be selected for maximum performance?

A: Selection depends on application requirements. The IXFX98N50P3 provides the highest current capacity (98A) and lowest on-resistance (50 mOhm), making it suitable for applications requiring maximum power handling and minimum conduction losses. The IXFX80N50Q3 offers a balanced approach with 80A capacity and standard 65 mOhm on-resistance. The APT50M65B2FLLG remains appropriate for designs specified at 67A with lower gate charge requirements.

Q: Are there any thermal considerations when selecting between these parts?

A: All three parts operate across the same temperature range (-55°C to 150°C). The higher power dissipation ratings of the IXYS parts (1250W and 1300W versus 694W) indicate greater thermal capacity. In thermally constrained applications, the IXYS devices may provide better thermal margin. However, actual thermal performance depends on PCB layout, heatsinking, and application duty cycle.

Q: What is the inventory status for each part?

A: The APT50M65B2FLLG has 1055 units in stock. The IXFX80N50Q3 has 2200 units available. The IXFX98N50P3 has 1446 units in stock. All parts are listed as active products with new original inventory.