RFD15P05 MOSFET P-Channel 50V 15A Equivalent & Substitute Parts

Part Overview

The RFD15P05 is a P-Channel MOSFET manufactured by onsemi, rated for 50V drain-to-source voltage and 15A continuous drain current in a Through Hole I-PAK package. This device is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. The RFD15P05 operates across a wide temperature range from -55°C to 175°C and dissipates up to 80W at the case temperature, making it suitable for power switching applications requiring P-Channel functionality.

Substiute Parts

RFD15P05

onsemiIn Stock: 15331RFD15P05 Datasheet

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FQU17P06TU

onsemiIn Stock: 7859FQU17P06TU Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RFD15P05 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• FET Type: P-Channel MOSFET technology
• Package: Through Hole I-PAK (TO-251-3 Short Leads)
• Drain-to-Source Voltage (Vdss): Must equal or exceed 50V
• Continuous Drain Current (Id): Must equal or exceed 15A at 25°C
• Gate Threshold Voltage (Vgs(th)): Compatibility at 4V nominal
• Maximum Gate Voltage (Vgs Max): Must accommodate ±20V operation
• Operating Temperature Range: Must support -55°C to 175°C or equivalent

Substitute Part Identified:

The FQU17P06TU (onsemi QFET® series) qualifies as a substitute based on the following alignment:

• P-Channel MOSFET technology with Through Hole I-PAK mounting
• Vdss rating of 60V exceeds the 50V requirement
• Continuous drain current of 12A at 25°C is lower than the 15A specification but operates within the same package and thermal envelope
• Gate threshold voltage of 4V @ 250µA matches the RFD15P05
• Maximum gate voltage of ±25V accommodates the ±20V requirement
• Operating temperature range of -55°C to 150°C covers the primary operating window

Parameter Comparison

Engineering Selection Recommendations

RFD15P05 (Primary Part): The RFD15P05 is classified as obsolete and is non-compliant with RoHS regulations. While 15,265 pieces are currently in stock, this part should not be selected for new designs or long-term production commitments. The obsolete status and regulatory non-compliance make it unsuitable for applications requiring regulatory approval or extended product lifecycle support.

FQU17P06TU (Substitute Part): The FQU17P06TU is also classified as obsolete but achieves ROHS3 compliance, providing improved regulatory standing. The substitute offers a higher Vdss rating (60V vs. 50V), which provides additional voltage margin in applications. The continuous drain current rating of 12A is lower than the RFD15P05 specification of 15A; therefore, applications requiring the full 15A continuous current cannot use this substitute without thermal or circuit redesign. The FQU17P06TU exhibits lower gate charge (27 nC vs. 150 nC) and input capacitance (900 pF vs. 1150 pF), resulting in faster switching characteristics. The maximum case temperature of 150°C is 25°C lower than the RFD15P05, which may impact thermal design margins in high-temperature applications. Both devices share identical package geometry (TO-251-3 Short Leads, IPak) and gate threshold voltage specifications, ensuring direct mechanical and gate-drive compatibility.

Frequently Asked Questions (FAQ)

Q: Can the FQU17P06TU directly replace the RFD15P05 in all applications?

A: Direct replacement is possible only in applications where the continuous drain current requirement does not exceed 12A at 25°C. The FQU17P06TU is rated for 12A continuous drain current, compared to the RFD15P05 specification of 15A. Applications requiring the full 15A rating require circuit redesign or thermal management modifications. Both devices share identical package geometry and gate threshold voltage, ensuring mechanical and gate-drive compatibility.

Q: What are the key differences in electrical performance between these devices?

A: The FQU17P06TU provides a higher Vdss rating (60V vs. 50V), offering increased voltage margin. Gate charge is significantly lower (27 nC vs. 150 nC), and input capacitance is reduced (900 pF vs. 1150 pF), resulting in faster switching response. On-state resistance specifications are measured at different current levels (135 mOhm @ 6A for FQU17P06TU vs. 150 mOhm @ 15A for RFD15P05), making direct comparison dependent on actual operating current. Maximum case temperature is 25°C lower for the FQU17P06TU (150°C vs. 175°C).

Q: Are there package compatibility concerns?

A: Both devices use identical package specifications: TO-251-3 Short Leads, IPak, Through Hole mounting. Pin configuration and mechanical dimensions are compatible, allowing direct board-level substitution without layout modifications.

Q: What is the regulatory compliance status of each device?

A: The RFD15P05 is RoHS non-compliant, while the FQU17P06TU achieves ROHS3 compliance. Both devices are classified as obsolete. For applications requiring regulatory approval or compliance documentation, the FQU17P06TU is the preferred choice.

Q: How do the thermal characteristics compare?

A: The RFD15P05 dissipates up to 80W at case temperature, while the FQU17P06TU dissipates up to 44W at case temperature. The lower power dissipation rating of the FQU17P06TU reflects its lower continuous current rating and may require thermal design review in high-power applications.

Q: What is the moisture sensitivity level for each device?

A: The RFD15P05 has a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions. The FQU17P06TU lists MSL as Not Applicable, indicating no moisture-related handling requirements.