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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Infineon Technologies IRL3402PBF

Name: IRL3402PBF
Brand: Infineon Technologies
SKU: IRL3402PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRL3402PBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: IRL3402PBF.pdf

Description:: MOSFET N-CH 20V 85A TO220AB

Quantity:: RFQ Add To RFQ list

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Inventory:8,707

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Product details

Overview

IRL3402PBF from Infineon Technologies (formerly International Rectifier) is a 20V, 85A, 0.01Ω R_DS(on) N-channel enhancement-mode Power MOSFET in TO-220AB package, optimized for 4.5V–7.0V gate drive and designed specifically for CPU core DC-DC converters. It delivers low conduction loss, fast switching (t_r = 140 ns, t_f = 120 ns), and robust avalanche capability (E_AS = 290 mJ).

For engineers reviewing the IRL3402PBF datasheet, IRL3402PBF pinout, IRL3402PBF application, or IRL3402PBF equivalent, key selection criteria include its 4.5V logic-level gate threshold, 1.1°C/W junction-to-case thermal resistance, body diode reverse recovery performance (t_rr = 72–110 ns), and suitability for high-current synchronous buck stages in server and desktop VRMs.

Technical Context

The IRL3402PBF employs advanced HEXFET® process technology with an optimized gate oxide to achieve ultra-low R_DS(on) at low V_GS, enabling efficient operation directly from 5V or 4.5V controller outputs. Its die size and packaging are tuned for minimal power loss in high-frequency, high-current CPU power delivery.

It features a fully rated body diode with 51A repetitive avalanche current (I_AR) and 11 mJ repetitive avalanche energy (E_AR), supporting reliable operation under hard-switching and transient overload conditions typical in multiphase VRM topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	20 V - Maximum drain-source blocking voltage; sets upper limit for input rail in buck converters.
R_DS(on) @ V_GS = 4.5V	0.010 Ω - Enables ≤0.46 W conduction loss at 68 A (typical CPU phase current), critical for thermal management.
I_D @ T_C = 25°C	85 A - Continuous drain current rating at heatsink-mounted case temperature; defines peak phase current capability.
Q_g	78 nC - Total gate charge; determines driver strength requirement and switching loss trade-off at 300–500 kHz.
t_r/t_f	140/120 ns - Rise/fall times at I_D = 51 A, RG = 5 Ω; enables fast transitions with controlled EMI in high-frequency VRMs.
R_θJC	1.1 °C/W - Junction-to-case thermal resistance; allows direct thermal interface to heatsink without derating below 110 W PD.
E_AS	290 mJ - Single-pulse avalanche energy; supports safe operation during inductive turn-off transients in synchronous rectification.

Pinout & Package

IRL3402PBF is housed in a through-hole TO-220AB package with isolated tab (drain-connected), offering low thermal resistance and mechanical robustness for industrial and computing power stages.

Pin/Terminal	Circuit Role	Design Meaning
1 - Gate	Control electrode	Receives 4.5–7.0 V logic-level drive; threshold voltage V_GS(th) = 0.7–1.2 V ensures full enhancement with standard PWM controllers.
2 - Drain	Main current output terminal	Internally connected to metal tab; must be electrically isolated from heatsink unless system design permits common-drain configuration.
3 - Source	Power return and reference node	Serves as switch-node reference for gate driver ICs; internal source inductance (L_S = 7.5 nH) impacts high-di/dt ringing.
4 - Drain (Tab)	Secondary drain connection	Provides low-inductance, high-current path to PCB copper pour or heatsink; improves thermal transfer and reduces loop inductance.

Key Features

Feature	Design Value
Logic-level gate drive compatibility	Guaranteed R_DS(on) ≤ 0.01 Ω at V_GS = 4.5 V, eliminating need for gate boosters in 5 V control architectures.
Optimized for CPU VRM efficiency	Die geometry and packaging minimize both conduction loss (R_DS(on)) and switching loss (Q_g, C_iss = 3300 pF) at 300–600 kHz.
Robust body diode	Reverse recovery time t_rr = 72–110 ns and Q_rr = 160–240 nC enable stable synchronous rectification without external Schottky assist.
High avalanche ruggedness	Rated for 51 A repetitive avalanche current and 290 mJ single-pulse energy, enhancing reliability during load dump or phase imbalance.

Applications

Server CPU Voltage Regulator

Desktop VRM Multiphase Buck

Use Scenario: High-current, multi-phase buck converter supplying dynamic 0.8–1.5 V core voltage to dual-socket Xeon processors.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier in each phase leg, switching at 300–500 kHz with precise dead-time control.

Use Value: 0.01 Ω R_DS(on) at 4.5 V gate drive reduces conduction loss by >35% vs. legacy 12 V gate MOSFETs, lowering thermal density per phase.

Use Scenario: 4–6 phase VRM on high-end gaming motherboards delivering up to 120 A to Intel Core i9 or AMD Ryzen CPUs.

IC Role / Device Role / Timing Role: Primary power switch in interleaved synchronous buck topology, driven by integrated PWM controller with adaptive gate timing.

Use Value: Fast 140 ns rise time and low 7.5 nH source inductance minimize shoot-through risk and improve current balance across phases.

Laptop CPU Core Supply

Industrial FPGA Power Rail

Use Scenario: Compact 2-phase VRM on thin-and-light notebook mainboards powering mobile CPUs with aggressive DVFS profiles.

IC Role / Device Role / Timing Role: High-efficiency power FET operating in continuous conduction mode with 500 kHz–1 MHz switching frequency.

Use Value: TO-220AB package provides sufficient thermal margin for 40–60 A peak loads without requiring costly thermal vias or copper slugs.

Use Scenario: Programmable logic supply in industrial PLCs or edge AI accelerators requiring stable 0.9–1.2 V at up to 50 A with long-term reliability.

IC Role / Device Role / Timing Role: Main switching element in isolated or non-isolated buck stage, subject to wide ambient temperature (-40°C to +85°C) and vibration.

Use Value: 150°C max junction temperature and -55°C min storage rating ensure operation in uncontrolled enclosures; avalanche rating protects against inductive kickback from motor drivers sharing same board.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel logic-level power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRL3803PBF	R_DS(on) = 0.006 Ω @ 4.5 V, ID = 100 A, higher Q_g (105 nC), TO-220AB	Better conduction loss but higher gate drive demand; requires stronger driver for same switching speed.	Preferred when minimizing I²R loss dominates over gate drive complexity and layout space.
SiR872DP-T1-GE3	R_DS(on) = 0.0045 Ω @ 4.5 V, 80 A, PQFN 5×6 mm, lower R_θJA but no isolated tab	Surface-mount, thermally superior in compact designs but lacks TO-220's mechanical mounting and isolation flexibility.	Chosen for space-constrained, high-density boards where automated assembly and thermal pads are available.

Compared with IRL3402PBF, IRL3803PBF offers lower R_DS(on) at the cost of increased gate charge and drive strength requirements, while SiR872DP-T1-GE3 trades through-hole robustness and heatsink isolation for superior thermal performance in SMT layouts.

Availability

IRL3402PBF is available at Aetrix Electronics and suitable for server CPU voltage regulators, desktop VRM multiphase buck converters, and industrial FPGA power rails requiring stable component supply and long-lifecycle support.

Supply support for IRL3402PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a global semiconductor leader specializing in power management, automotive, and industrial control solutions, with deep expertise in silicon-based power devices.

The IRL3402PBF belongs to Infineon's legacy HEXFET® logic-level MOSFET product line, engineered specifically for high-efficiency, high-current DC-DC conversion in computing and communications infrastructure.

FAQ

What is the maximum recommended gate voltage for IRL3402PBF?

The absolute maximum gate-to-source voltage (V_GS) is ±10 V, with a startup transient rating of 14 V for ≤100 µs. Operation above 10 V risks gate oxide degradation; for reliable 4.5–7.0 V drive, use controllers with tight V_GS regulation and clamp protection.

Can IRL3402PBF be used in parallel configurations?

Yes - its positive R_DS(on) temperature coefficient (0.02 V/°C) enables inherent current sharing. For stable paralleling, match gate drive impedance, minimize layout asymmetry, and ensure identical thermal mounting to avoid thermal runaway at >100 A total current.

Does IRL3402PBF require a gate resistor, and what value is typical?

A gate resistor is required to dampen ringing and control dV/dt. Typical values range from 2.2 Ω to 10 Ω depending on driver strength and layout parasitics; 5 Ω is specified in the datasheet for switching time characterization and balances speed versus EMI.

How does the body diode performance impact synchronous rectification?

The body diode has t_rr = 72–110 ns and Q_rr = 160–240 nC at 100 A/µs di/dt. This enables clean commutation in synchronous buck topologies without external diodes, though careful dead-time tuning is needed to avoid cross-conduction losses.

IRL3402PBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 20 V

Current - Continuous Drain (Id) @ 25°C:: 85A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 7V

Rds On (Max) @ Id, Vgs:: 8mOhm @ 51A, 7V

Vgs(th) (Max) @ Id:: 700mV @ 250µA (Min)

Gate Charge (Qg) (Max) @ Vgs:: 78 nC @ 4.5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 3300 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 110W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

IRL3402PBF FAQ

1.How can I place an order for IRL3402PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRL3402PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for IRL3402PBF reliable?

The price and inventory of IRL3402PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRL3402PBF is usually 5 days.

3.What payment methods are accepted for IRL3402PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRL3402PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRL3402PBF?

IRL3402PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRL3402PBF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for IRL3402PBF?

For technical support, including IRL3402PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRL3402PBF requirements.

6.How does Aetrix verify that IRL3402PBF is sourced from the original manufacturer or authorized distributors?

All IRL3402PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IRL3402PBF meets industry standards.

7.What is the process for return or replacement of IRL3402PBF?

All IRL3402PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRL3402PBF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The IRL3402PBF part is unused and in its original packaging.

Return procedure for IRL3402PBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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