FDD2582 Equivalent & Substitute Parts

Part Overview

The FDD2582 is an N-Channel MOSFET manufactured by onsemi, rated for 150V drain-to-source voltage with continuous drain current ratings of 3.7A at ambient temperature (Ta) and 21A at case temperature (Tc). This device is housed in a Surface Mount TO-252AA package and is part of the PowerTrench® series. The FDD2582 is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified to provide design flexibility when the primary part is unavailable, when inventory constraints exist, or when alternative sourcing is required while maintaining electrical and mechanical compatibility within specified operating parameters.

Substiute Parts

FDD2582

onsemiIn Stock: 40698FDD2582 Datasheet

Current PartRFQ

AOD2544

Alpha & Omega Semiconductor Inc.In Stock: 1459AOD2544 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDD2582 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Drain-to-Source Voltage (Vdss) must equal or exceed 150V
• Continuous drain current ratings (both Ta and Tc) must meet or exceed the FDD2582 specifications
• On-state resistance (Rds On) must not exceed the maximum specified value to ensure thermal performance
• Gate threshold voltage (Vgs(th)) must be compatible with existing gate drive circuitry
• Operating temperature range must encompass -55°C to 175°C (TJ)

Mechanical Compatibility Criteria:

• Package type must be TO-252-3 (DPAK with 2 Leads + Tab) for direct PCB footprint compatibility
• Surface Mount mounting type is required
• Pin configuration must be identical (Drain, Gate, Source)

Regulatory & Compliance Criteria:

• RoHS3 compliance is mandatory
• Moisture Sensitivity Level (MSL) of 1 (Unlimited) is required
• REACH Unaffected status must be maintained

The AOD2544 from Alpha & Omega Semiconductor Inc. meets all substitution criteria and is classified as an equivalent part for the FDD2582.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: FDD2582 (onsemi)

The FDD2582 is the specified component and should be used as the first choice when available. It is an Active product with full regulatory compliance (RoHS3, REACH Unaffected) and unlimited moisture sensitivity rating.

Equivalent Substitute: AOD2544 (Alpha & Omega Semiconductor Inc.)

The AOD2544 is a direct electrical and mechanical equivalent for the FDD2582. Both devices share identical voltage ratings (150V Vdss), identical operating temperature range (-55°C to 175°C TJ), and identical package configuration (TO-252-3 DPAK). Both parts maintain Active product status and full compliance with RoHS3 and REACH requirements.

The AOD2544 demonstrates superior electrical performance characteristics compared to the FDD2582:

• Higher continuous drain current ratings (6.5A Ta, 23A Tc versus 3.7A Ta, 21A Tc)
• Lower on-state resistance (54 mOhm versus 66 mOhm)
• Lower gate threshold voltage (2.7V versus 4V)
• Lower gate charge (20 nC versus 25 nC)
• Lower input capacitance (675 pF versus 1295 pF)

These performance advantages make the AOD2544 suitable for direct substitution in applications where the FDD2582 is specified. The AOD2544 will operate within the same circuit parameters and PCB footprint as the FDD2582.

Frequently Asked Questions (FAQ)

Q: Can the AOD2544 be used as a direct replacement for the FDD2582 on the same PCB?

A: Yes. Both devices use identical TO-252-3 (DPAK) package configuration with the same pin layout (Drain, Gate, Source). No PCB modifications are required for physical substitution.

Q: Are there any gate drive circuit modifications needed when switching from FDD2582 to AOD2544?

A: No modifications are required. Both devices operate within the same gate voltage range (±20V maximum). The AOD2544 has a lower gate threshold voltage (2.7V versus 4V), which provides improved gate drive margin but does not require circuit changes.

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

A: Yes. Both the FDD2582 and AOD2544 are RoHS3 compliant, REACH Unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. Both are classified as Active products.

Q: What is the difference in thermal performance between these two parts?

A: The AOD2544 has a lower maximum power dissipation rating at case temperature (75W Tc versus 95W Tc for the FDD2582). However, the AOD2544's lower on-state resistance (54 mOhm versus 66 mOhm) typically results in lower actual power dissipation during operation. Thermal design should be verified for the specific application.

Q: Are there any differences in switching characteristics between the FDD2582 and AOD2544?

A: The AOD2544 has lower gate charge (20 nC versus 25 nC) and lower input capacitance (675 pF versus 1295 pF), which result in faster switching response. These characteristics are beneficial for high-frequency applications and do not create compatibility issues.

Q: Can the AOD2544 handle higher current levels than the FDD2582?

A: Yes. The AOD2544 is rated for higher continuous drain current (6.5A Ta, 23A Tc) compared to the FDD2582 (3.7A Ta, 21A Tc). The AOD2544 can be used in applications requiring higher current capacity without circuit modification.

Q: What is the inventory status of these parts?

A: The FDD2582 has 40,667 pieces in stock. The AOD2544 has 1,380 pieces in stock. Both are available as new original components in Cut Tape (CT) and Digi-Reel® packaging options.