AON7448 Equivalent & Substitute Parts

Part Overview

The AON7448 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 80V drain-to-source voltage with continuous drain current of 7.1A at Ta and 24A at Tc. This device is housed in an 8-DFN-EP (3x3) surface mount package and belongs to the SDMOS™ series. The AON7448 is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support, production continuity, and component sourcing in applications where this device was previously specified.

Substiute Parts

AON7448

Alpha & Omega Semiconductor Inc.In Stock: 14471AON7448 Datasheet

Current PartRFQ

FDMC86324

onsemiIn Stock: 1497FDMC86324 Datasheet

MFR RecommendedRFQ

STL8N10LF3

STMicroelectronicsIn Stock: 1649STL8N10LF3 Datasheet

MFR RecommendedRFQ

TPN3300ANH,LQ

Toshiba Semiconductor and StorageIn Stock: 6380TPN3300ANH,LQ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AON7448 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Drain-to-Source Voltage (Vdss) must equal or exceed 80V
• Continuous drain current (Id) must support the application's current requirements at both Ta and Tc conditions
• On-resistance (Rds On) must be compatible with power dissipation and switching loss budgets
• Gate threshold voltage (Vgs(th)) must fall within acceptable control circuit operating ranges
• Gate charge (Qg) and input capacitance (Ciss) must be compatible with driver circuits
• Maximum gate voltage (Vgs Max) must accommodate control signal levels

Mechanical Compatibility Criteria:

• Surface mount mounting type
• Package footprint compatibility or acceptable PCB layout modifications
• Moisture sensitivity level (MSL) rating of 1 or equivalent

Compliance Criteria:

• REACH compliance status
• RoHS compliance status where applicable
• ECCN classification

The three substitute parts listed below meet these criteria with varying degrees of parameter alignment and product status considerations.

Parameter Comparison

Engineering Selection Recommendations

FDMC86324 (onsemi)

The FDMC86324 is the closest electrical equivalent to the AON7448. Both devices share an 80V Vdss rating and comparable continuous drain current specifications (7A Ta / 20A Tc versus 7.1A Ta / 24A Tc). The FDMC86324 exhibits lower on-resistance (23 mOhm versus 30 mOhm) and slightly higher gate charge (18 nC versus 17.5 nC). This device is currently in active production status with ROHS3 compliance and unlimited MSL rating. The primary consideration is package compatibility: the FDMC86324 uses a Power33 package rather than the 8-DFN-EP (3x3), requiring PCB layout modification. This substitute is suitable for applications where the lower on-resistance provides thermal or efficiency benefits and package footprint changes are acceptable.

STL8N10LF3 (STMicroelectronics)

The STL8N10LF3 offers higher voltage capability (100V Vdss) and maintains 20A continuous drain current at Tc. This device features higher on-resistance (35 mOhm) and higher gate charge (20.5 nC), resulting in increased power dissipation and switching losses compared to the AON7448. The STL8N10LF3 is qualified to AEC-Q101 automotive standards and supports an extended operating temperature range to 175°C. This device is in active production with ROHS3 compliance. The PowerFlat™ (5x6) package requires significant PCB layout modification. This substitute is appropriate for applications requiring automotive qualification, higher voltage margin, or extended temperature operation where the increased on-resistance is acceptable.

TPN3300ANH,LQ (Toshiba Semiconductor and Storage)

The TPN3300ANH,LQ provides 100V Vdss rating with 9.4A continuous drain current at Tc, representing a lower current capability than the AON7448. This device exhibits the lowest gate charge (11 nC) and input capacitance (880 pF), offering advantages in switching speed and driver circuit requirements. On-resistance is 33 mOhm at 4.7A, 10V. The device is in active production with RoHS compliance and unlimited MSL rating. The 8-TSON Advance (3.3x3.3) package is mechanically similar to the original 8-DFN-EP (3x3) footprint, minimizing PCB layout modifications. This substitute is suitable for applications where lower current requirements are acceptable and reduced gate charge provides circuit design benefits.

Frequently Asked Questions (FAQ)

Q: Can the FDMC86324 be used as a direct replacement for the AON7448 without PCB modifications?

A: No. While the FDMC86324 is electrically compatible, it uses a Power33 package instead of the 8-DFN-EP (3x3) package. PCB layout modifications are required, including changes to pad geometry, trace routing, and thermal management structures.

Q: Why does the STL8N10LF3 have a higher Vdss rating (100V) than the AON7448 (80V)?

A: The STL8N10LF3 is designed for applications requiring higher voltage margin and is qualified to automotive standards (AEC-Q101). The higher Vdss rating provides additional design headroom but does not affect compatibility in 80V applications where the AON7448 was used.

Q: Which substitute part has the lowest switching losses?

A: The TPN3300ANH,LQ has the lowest gate charge (11 nC) and input capacitance (880 pF), resulting in lower switching losses and reduced driver circuit power consumption. However, its lower continuous drain current (9.4A Tc) limits its applicability to lower-current designs.

Q: Are all substitute parts RoHS compliant?

A: Yes. The FDMC86324 and STL8N10LF3 are ROHS3 compliant. The TPN3300ANH,LQ is RoHS compliant. All three devices maintain REACH Unaffected or REACH Unaffected status and carry EAR99 ECCN classification.

Q: What is the primary advantage of the FDMC86324 over the AON7448?

A: The FDMC86324 offers lower on-resistance (23 mOhm versus 30 mOhm), reducing conduction losses and heat dissipation in high-current applications. It maintains the same 80V Vdss rating and comparable current ratings while being in active production.

Q: Can the TPN3300ANH,LQ be used in applications requiring 24A continuous drain current?

A: No. The TPN3300ANH,LQ is rated for 9.4A continuous drain current at Tc, which is insufficient for applications requiring the AON7448's 24A capability. This device is suitable only for lower-current designs.

Q: Which substitute requires the least PCB layout modification?

A: The TPN3300ANH,LQ uses an 8-TSON Advance (3.3x3.3) package, which is mechanically similar to the original 8-DFN-EP (3x3) footprint. This minimizes PCB layout changes compared to the FDMC86324 (Power33) and STL8N10LF3 (PowerFlat™ 5x6).

Q: Is the AON7448 still available for purchase?

A: The AON7448 is classified as obsolete. While inventory may exist through component distributors (14,431 pcs reported in stock), long-term availability is not guaranteed. Transition to an active substitute part is recommended for new designs and ongoing production.

Q: What is the moisture sensitivity level (MSL) for all parts?

A: All four devices, including the AON7448 and the three substitutes, carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage and handling.

Q: How do the operating temperature ranges compare?

A: The AON7448, FDMC86324, and TPN3300ANH,LQ support -55°C to 150°C. The STL8N10LF3 extends to -55°C to 175°C, providing additional margin for high-temperature applications.