RFP30P05 Equivalent & Substitute Parts

Part Overview

The RFP30P05 is a P-Channel MOSFET rated for 50V drain-to-source voltage with 30A continuous drain current in a Through Hole TO-220-3 package. Manufactured by onsemi, this device is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design requirements and production continuity. Substitute parts must maintain functional compatibility across critical electrical parameters while meeting current product availability and compliance standards.

Substiute Parts

RFP30P05

onsemiIn Stock: 15434RFP30P05 Datasheet

Current PartRFQ

FQP27P06

onsemiIn Stock: 54342FQP27P06 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RFP30P05 are identified based on the following critical parameters that determine functional compatibility:

Channel Type & Polarity: P-Channel topology must be maintained for circuit compatibility.

Voltage Rating (Vdss): The substitute must equal or exceed the 50V rating. The FQP27P06 provides 60V, which is acceptable for applications designed for 50V operation.

Current Rating (Id): The substitute must support the required continuous drain current. The FQP27P06 is rated for 27A, which is within acceptable tolerance for 30A applications where thermal management and duty cycle considerations apply.

On-Resistance (Rds On): The substitute must maintain comparable or superior on-resistance characteristics to ensure thermal performance and power dissipation remain within design limits.

Gate Characteristics: Threshold voltage (Vgs(th)) and gate charge (Qg) must be compatible with existing gate drive circuitry.

Package & Mounting: TO-220-3 Through Hole package compatibility ensures mechanical and thermal interface equivalence.

Compliance Status: Active product status with current certifications (RoHS3 Compliant) provides supply chain continuity and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

FQP27P06 as Primary Substitute

The FQP27P06 is the appropriate substitute for the obsolete RFP30P05 based on the following engineering criteria:

Electrical Compatibility: Both devices are P-Channel MOSFETs with identical threshold voltage specifications (4V @ 250µA), ensuring gate drive circuit compatibility without modification. The FQP27P06 provides higher voltage rating (60V vs. 50V), which is acceptable for 50V-rated applications and provides additional design margin.

Current Rating Consideration: The FQP27P06 is rated for 27A continuous drain current compared to the RFP30P05's 30A rating. This 10% reduction in current capacity requires thermal analysis for applications operating at or near the 30A limit. For applications with duty cycles below 100% or with adequate thermal management, the FQP27P06 operates within acceptable parameters.

On-Resistance Performance: The FQP27P06 exhibits comparable on-resistance characteristics (70 mOhm @ 13.5A, 10V) relative to the RFP30P05 (65 mOhm @ 30A, 10V). Power dissipation remains within acceptable limits for equivalent thermal conditions.

Gate Drive Advantages: The FQP27P06 features significantly lower gate charge (43 nC @ 10V vs. 170 nC @ 20V) and input capacitance (1400 pF vs. 3200 pF), resulting in faster switching characteristics and reduced gate drive power requirements.

Compliance & Availability: The FQP27P06 holds Active product status with ROHS3 compliance, ensuring long-term supply chain availability and regulatory conformance. The RFP30P05's Obsolete status creates supply risk and potential compliance issues for new designs.

Package Compatibility: Both devices utilize TO-220-3 Through Hole packaging, ensuring mechanical and thermal interface equivalence without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the FQP27P06 directly replace the RFP30P05 without circuit modification?

A: Yes, for applications where continuous drain current does not exceed 27A. Both devices share identical threshold voltage (4V @ 250µA), gate drive voltage requirements (10V), and TO-220-3 package configuration. No gate drive circuit modifications are required. Applications requiring the full 30A rating must implement thermal management or duty cycle adjustments.

Q: What is the significance of the voltage rating difference (50V vs. 60V)?

A: The FQP27P06's higher voltage rating (60V) is acceptable for circuits designed for 50V operation. This provides additional design margin and does not create compatibility issues. The device operates safely at voltages below its maximum rating.

Q: How does the lower gate charge of the FQP27P06 affect circuit performance?

A: The FQP27P06's lower gate charge (43 nC @ 10V vs. 170 nC @ 20V) and input capacitance (1400 pF vs. 3200 pF) enable faster switching transitions and reduce gate drive power consumption. This typically improves overall circuit efficiency and may allow use of lower-power gate drive circuits.

Q: Is the 3A reduction in current rating (27A vs. 30A) a limiting factor?

A: The current rating difference requires evaluation based on application duty cycle and thermal conditions. For continuous operation at 30A, thermal management must be verified. For applications with duty cycles below 100% or with adequate heatsinking, the FQP27P06 operates within acceptable parameters. Thermal analysis is necessary for applications operating near the 30A limit.

Q: Are there any compliance or supply chain advantages to using the FQP27P06?

A: Yes. The FQP27P06 holds Active product status with ROHS3 compliance, ensuring long-term availability and regulatory conformance. The RFP30P05's Obsolete status creates supply risk and potential compliance issues for new designs or production continuity.

Q: Does the TO-220-3 package remain the same for both devices?

A: Yes. Both the RFP30P05 and FQP27P06 utilize identical TO-220-3 Through Hole packaging. No PCB layout modifications or thermal interface changes are required for mechanical compatibility.

Q: What parameters should be verified during design transition from RFP30P05 to FQP27P06?

A: Verify continuous drain current requirements do not exceed 27A under worst-case thermal conditions. Confirm gate drive voltage compatibility (both require 10V for optimal on-resistance). Validate thermal performance with the FQP27P06's on-resistance characteristics. Confirm PCB layout accommodates the identical TO-220-3 footprint.