IRF7303PBF Equivalent & Substitute Parts

Part Overview

The IRF7303PBF is a dual N-channel MOSFET array manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 4.9A continuous drain current. This component is configured as a 2N-channel device in an 8-SOIC surface mount package and is part of the HEXFET® series. The IRF7303PBF is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain compatibility with the 30V voltage rating, 8-SOIC package footprint, and dual N-channel configuration while meeting RoHS3 compliance and MSL 1 moisture sensitivity requirements.

Substiute Parts

IRF7303PBF

Infineon TechnologiesIn Stock: 2223IRF7303PBF Datasheet

Current PartRFQ

AO4842

Alpha & Omega Semiconductor Inc.In Stock: 210280AO4842 Datasheet

MFR RecommendedRFQ

DMG4822SSD-13

Diodes IncorporatedIn Stock: 23186DMG4822SSD-13 Datasheet

MFR RecommendedRFQ

FDS6930B

onsemiIn Stock: 60223FDS6930B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IRF7303PBF is determined by strict adherence to the following criteria:

Mandatory Compatibility Parameters:

• Drain to Source Voltage (Vdss): Must equal or exceed 30V
• Configuration: Must be 2 N-Channel (Dual) topology
• Package / Case: Must be 8-SOIC (0.154", 3.90mm Width) for PCB footprint compatibility
• Mounting Type: Must be Surface Mount
• Operating Temperature Range: Must encompass -55°C ~ 150°C (TJ)
• RoHS Status: Must be ROHS3 Compliant
• Moisture Sensitivity Level: Must be MSL 1 (Unlimited)

Performance Parameters (Allowable Variation):

• Current - Continuous Drain (Id) @ 25°C: Substitute must meet or exceed 4.9A
• Rds On (Max) @ Id, Vgs: Lower values are acceptable (improved performance)
• Gate Charge (Qg): Lower values are acceptable (faster switching)
• Input Capacitance (Ciss): Lower values are acceptable (reduced gate drive requirements)

The three identified substitute parts—AO4842, DMG4822SSD-13, and FDS6930B—satisfy all mandatory compatibility parameters and represent direct functional alternatives within the 30V dual N-channel MOSFET category.

Parameter Comparison

Engineering Selection Recommendations

DMG4822SSD-13 (Diodes Incorporated) is the primary substitute for new production applications. This part maintains active product status, ensuring long-term availability and supply chain stability. The DMG4822SSD-13 exceeds the IRF7303PBF current rating at 10A continuous drain current and delivers superior on-state resistance performance at 20mOhm. The part is ROHS3 compliant with MSL 1 rating and operates across the full -55°C to 150°C temperature range. Current inventory of 23,100 units supports immediate procurement requirements.

FDS6930B (onsemi) serves as a secondary substitute for applications where the original IRF7303PBF specifications are fully met. This PowerTrench® series device provides 5.5A continuous drain current with 38mOhm on-state resistance. The FDS6930B carries Last Time Buy status, indicating limited future availability. The part is ROHS3 compliant with MSL 1 rating and full temperature range support. Inventory of 60,200 units is currently available.

AO4842 (Alpha & Omega Semiconductor Inc.) is suitable for applications where continuous drain current specification is not critical. This part features the lowest on-state resistance at 22mOhm and reduced gate charge at 11nC, offering improved switching performance. However, the AO4842 carries Not For New Designs status, restricting its use to legacy system maintenance only. ROHS3 compliance and MSL 1 rating are maintained. Inventory of 210,200 units is available.

All three substitutes maintain electrical and thermal compatibility within the 30V voltage class and 8-SOIC package footprint. Selection should prioritize DMG4822SSD-13 for new designs, with FDS6930B as a secondary option for established production lines.

Frequently Asked Questions (FAQ)

Q: Can the IRF7303PBF be directly replaced with any of these substitute parts on existing PCBs?

A: Yes. All three substitute parts—AO4842, DMG4822SSD-13, and FDS6930B—share the identical 8-SOIC (0.154", 3.90mm Width) package footprint and pin configuration as the IRF7303PBF. Direct PCB replacement is possible without layout modifications.

Q: What is the primary difference between the three substitute options?

A: The primary differences are product status and current rating. DMG4822SSD-13 is Active with 10A rating, FDS6930B is Last Time Buy with 5.5A rating, and AO4842 is Not For New Designs with unspecified current rating. For new production, DMG4822SSD-13 is the recommended choice.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All three substitute parts—AO4842, DMG4822SSD-13, and FDS6930B—are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the environmental and handling requirements of the IRF7303PBF.

Q: What is the significance of the on-state resistance (Rds On) differences?

A: Lower Rds On values reduce power dissipation and heat generation during operation. DMG4822SSD-13 at 20mOhm and AO4842 at 22mOhm provide superior thermal performance compared to the original IRF7303PBF at 50mOhm. FDS6930B at 38mOhm offers intermediate performance. Selection depends on thermal budget requirements of the specific application.

Q: Can these parts be used in high-temperature applications?

A: Yes. All substitute parts operate across the full -55°C to 150°C junction temperature range, identical to the IRF7303PBF. No thermal derating is required within this specification window.

Q: Why is DMG4822SSD-13 recommended over the other options?

A: DMG4822SSD-13 carries Active product status, ensuring continued availability and manufacturer support. It also provides the highest current rating at 10A and superior on-state resistance at 20mOhm, delivering improved performance margins for most applications.

Q: What does "Last Time Buy" status mean for FDS6930B?

A: Last Time Buy indicates that onsemi has announced end-of-life for this product. Existing inventory will be sold, but no new production is planned. This part is suitable for maintenance of existing systems but not recommended for new designs with extended production timelines.

Q: What does "Not For New Designs" status mean for AO4842?

A: Not For New Designs indicates that Alpha & Omega Semiconductor Inc. does not recommend this part for new product development. The part remains available for legacy system support and maintenance. Use is restricted to replacement applications only.

Q: Are gate drive requirements different between the main part and substitutes?

A: Yes. The IRF7303PBF has a gate threshold voltage (Vgs(th)) of 1V, while all substitutes range from 2.6V to 3V. Additionally, gate charge values differ significantly. Circuit gate drive design may require adjustment to accommodate these differences, particularly for low-voltage gate drive circuits.

Q: Can I use these parts interchangeably in the same circuit?

A: Electrical interchangeability is confirmed for the 30V voltage class and dual N-channel configuration. However, differences in gate threshold voltage, gate charge, and on-state resistance may affect circuit performance. Circuit simulation or prototype testing is necessary to confirm suitability for specific applications.