FDP8447L N-Channel MOSFET 40V 12A/50A TO-220-3 Equivalent & Substitute Parts

Part Overview

The FDP8447L is an N-Channel MOSFET manufactured by onsemi, rated for 40V drain-to-source voltage with continuous drain current of 12A at Ta (ambient temperature) or 50A at Tc (case temperature). This device is packaged in TO-220-3 through-hole configuration and belongs to the PowerTrench® series. The FDP8447L is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and system maintenance. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, thermal characteristics, and gate drive requirements while accommodating the through-hole TO-220 package format.

Substiute Parts

FDP8447L

onsemiIn Stock: 15556FDP8447L Datasheet

Current PartRFQ

IRF1104PBF

Infineon TechnologiesIn Stock: 15364IRF1104PBF Datasheet

SimilarRFQ

PHP191NQ06LT,127

Nexperia USA Inc.In Stock: 3002PHP191NQ06LT,127 Datasheet

SimilarRFQ

PSMN2R2-40PS,127

Nexperia USA Inc.In Stock: 3417PSMN2R2-40PS,127 Datasheet

SimilarRFQ

PSMN4R5-40PS,127

Nexperia USA Inc.In Stock: 10067PSMN4R5-40PS,127 Datasheet

SimilarRFQ

PSMN8R0-40PS,127

Nexperia USA Inc.In Stock: 5579PSMN8R0-40PS,127 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FDP8447L are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Voltage Rating Compatibility: All substitute parts maintain a Vdss rating of 40V or higher, ensuring the device can block the same or greater voltage levels as the original FDP8447L.

Current Handling: Substitute parts are rated for continuous drain current (Tc) of 77A or greater, exceeding the FDP8447L's 50A (Tc) rating. This provides equal or superior current capacity.

On-State Resistance (Rds On): Substitute parts exhibit Rds On values ranging from 2.1 mOhm to 9 mOhm at specified gate drive voltages (10V), maintaining low conduction losses comparable to or better than the original 8.7 mOhm specification.

Gate Drive Voltage: All substitutes operate with 10V gate drive voltage, matching the FDP8447L's drive voltage specification and ensuring compatibility with existing gate drive circuits.

Package Format: All substitute parts are housed in TO-220-3 or TO-220AB through-hole packages, maintaining mechanical and thermal interface compatibility with the original design.

Operating Temperature Range: Substitute parts support operating temperature ranges of -55°C to 175°C, encompassing or exceeding the FDP8447L's -55°C to 150°C range.

Compliance Standards: All substitute parts are RoHS3 compliant and REACH unaffected, matching the regulatory status of the original device.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: IRF1104PBF (Infineon Technologies)

The IRF1104PBF is the only substitute part with active product status. This device maintains 40V Vdss rating and provides 100A continuous drain current (Tc), doubling the FDP8447L's 50A capacity. The IRF1104PBF exhibits 9 mOhm on-state resistance at 60A and 10V gate drive, closely matching the FDP8447L's 8.7 mOhm specification. Operating temperature range extends to 175°C, exceeding the original device's 150°C maximum. RoHS3 compliance and REACH unaffected status align with regulatory requirements. Active product status ensures long-term availability and manufacturing support.

Secondary Recommendations for Equivalent Performance:

PSMN4R5-40PS,127 (Nexperia) provides 40V/100A rating with 4.6 mOhm on-state resistance and 42.3 nC gate charge, offering improved switching characteristics. PSMN8R0-40PS,127 (Nexperia) delivers 40V/77A rating with 7.6 mOhm on-state resistance and minimal 21 nC gate charge, suitable for applications prioritizing low gate drive power.

Voltage-Rated Alternative:

PHP191NQ06LT,127 (Nexperia) provides 55V Vdss rating with 75A continuous current and superior 3.7 mOhm on-state resistance, offering enhanced voltage margin for applications with transient overvoltage conditions.

Compliance and Availability Considerations:

All substitute parts maintain RoHS3 compliance and REACH unaffected status, satisfying regulatory requirements equivalent to the FDP8447L. Inventory availability varies: IRF1104PBF (15,310 pcs), PSMN4R5-40PS,127 (10,021 pcs), PSMN8R0-40PS,127 (5,557 pcs), PSMN2R2-40PS,127 (3,400 pcs), and PHP191NQ06LT,127 (2,917 pcs) are currently in stock.

Frequently Asked Questions (FAQ)

Q: Can the IRF1104PBF directly replace the FDP8447L in existing PCB designs?

A: The IRF1104PBF is electrically compatible with the FDP8447L across all critical parameters: 40V Vdss, 10V gate drive, and superior current handling (100A vs. 50A). Both devices use TO-220-3/TO-220AB through-hole packages with identical pin configurations (Gate, Drain, Source). PCB layouts require no modification for pin-to-pin substitution.

Q: What is the difference between TO-220-3 and TO-220AB package designations?

A: TO-220-3 and TO-220AB are functionally equivalent through-hole packages with identical pin spacing (0.1 inch), lead configuration, and thermal interface characteristics. The designations reflect minor manufacturing variations but do not affect electrical performance or mechanical fit in standard TO-220 footprints.

Q: Why does the PSMN2R2-40PS,127 have lower on-state resistance (2.1 mOhm) than the FDP8447L (8.7 mOhm)?

A: Lower on-state resistance results from advanced semiconductor process technology and larger die area within the same package. The PSMN2R2-40PS,127 reduces conduction losses and heat generation, improving overall system efficiency. This represents a performance enhancement rather than a compatibility concern.

Q: Are all substitute parts suitable for high-frequency switching applications?

A: Gate charge (Qg) and input capacitance (Ciss) determine switching speed capability. The PSMN8R0-40PS,127 exhibits the lowest gate charge (21 nC) and input capacitance (1262 pF), optimizing high-frequency performance. The PSMN2R2-40PS,127 and PHP191NQ06LT,127 show higher gate charge values (130 nC and 95.6 nC respectively), requiring greater gate drive power but maintaining acceptable switching speeds in standard applications.

Q: What is the significance of the operating temperature range difference between FDP8447L (-55°C to 150°C) and substitute parts (-55°C to 175°C)?

A: The extended temperature range of substitute parts provides additional thermal margin for applications operating near maximum junction temperature. The FDP8447L's 150°C maximum is encompassed within the substitute parts' 175°C range, ensuring compatibility across all intended operating conditions. Applications limited to 150°C operation experience no functional difference.

Q: Can the PHP191NQ06LT,127 with 55V Vdss rating be used in 40V applications?

A: Yes. The PHP191NQ06LT,127's 55V Vdss rating exceeds the 40V requirement, providing additional voltage margin for transient overvoltage protection. The device operates identically in 40V circuits while offering enhanced reliability against voltage spikes. No circuit modifications are required.

Q: How do gate threshold voltage differences affect circuit design?

A: Gate threshold voltage (Vgs(th)) determines the minimum gate voltage required to turn the device on. The FDP8447L specifies 3V maximum at 250µA, while most substitutes specify 4V maximum at 1mA. These variations fall within standard gate drive voltage ranges (10V nominal) and do not require circuit redesign. Gate drive circuits operating at 10V or higher accommodate all specified threshold variations.

Q: Which substitute part offers the best thermal performance?

A: The PSMN2R2-40PS,127 provides the highest power dissipation rating (306W at Tc) combined with the lowest on-state resistance (2.1 mOhm), resulting in minimal heat generation and superior thermal performance. The IRF1104PBF offers 170W dissipation with 9 mOhm resistance, providing balanced thermal characteristics suitable for most applications.