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

Infineon Technologies IRL3102

Name: IRL3102
Brand: Infineon Technologies
SKU: IRL3102
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRL3102

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: IRL3102.pdf

Description:: MOSFET N-CH 20V 61A TO220AB

Quantity:: RFQ Add To RFQ list

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Inventory:7,689

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Product details

Overview

IRL3102 from Infineon Technologies (formerly International Rectifier) is a 20V, 61A N-channel enhancement-mode Power MOSFET in TO-220AB package, optimized for 4.5V gate drive and designed specifically for CPU core DC-DC converters. It features R_DS(on) = 13 mΩ @ V_GS = 7.0V, 37A; E_AS = 220 mJ single-pulse avalanche energy; and fast switching with t_r = 130 ns, t_f = 110 ns.

For engineers reviewing the IRL3102 datasheet, IRL3102 pinout, IRL3102 application, or IRL3102 equivalent, key selection criteria include low R_DS(on) at 4.5V drive, robust avalanche capability, TO-220 thermal performance, and suitability for high-efficiency synchronous buck stages in PC power delivery.

Technical Context

The IRL3102 employs advanced HEXFET process technology with an optimized gate oxide to achieve stable on-resistance down to 13 mΩ at 7.0V gate drive and 37A drain current, while maintaining 15 mΩ at 4.5V/37A - critical for low-voltage, high-current CPU VRMs. Its body diode exhibits t_rr = 59–88 ns and Q_rr = 110–160 nC under 100 A/µs di/dt, enabling efficient synchronous rectification.

Thermally, it delivers R_θJC = 1.4 °C/W and supports continuous operation up to T_J = 150°C, with linear derating of 0.71 W/°C above 25°C case temperature. The device is rated for repetitive avalanche (I_AR = 35A, E_AR = 8.9 mJ) and peak dv/dt of 5.0 V/ns during diode recovery - essential for noise-immune operation in dense, fast-switching converter layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	20 V - Maximum blocking voltage compatible with 12V input rails and transient overshoot margins in CPU core supplies.
R_DS(on) @ 4.5V	15 mΩ - Enables <1W conduction loss at 37A, reducing heat sink requirements in space-constrained VRMs.
I_D @ 25°C	61 A - Supports high peak currents in transient load steps typical of modern microprocessors.
E_AS	220 mJ - Withstands single-event inductive energy spikes without failure during startup or fault conditions.
Q_g	58 nC - Optimized gate charge enables efficient 4.5V-driven gate driving with minimal driver loss and layout complexity.
t_r/t_f	130/110 ns - Fast edge rates reduce switching losses and improve efficiency at 300–1000 kHz operating frequencies.
C_iss/C_oss	2500/1000 pF - Low output capacitance minimizes turn-off loss and improves light-load efficiency in buck converters.

Pinout & Package

IRL3102 is housed in a TO-220AB package with isolated tab (drain-connected), standard mounting hole, and 1.1 N·m screw torque rating. Thermal resistance from junction to case is 1.4 °C/W, enabling direct heatsink attachment for high-power dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1 - Gate	Control electrode	Receives 4.5–10V logic-level drive; low Q_g (58 nC) ensures fast, low-loss switching with standard PWM controllers.
2 - Drain	Main current path (high-side)	Internally connected to metal tab; must be electrically isolated from heatsink unless system ground reference permits.
3 - Source	Return path / reference node	Serves as power ground reference for gate drive and current sensing; low-inductance layout critical for stability.
4 - Drain (Tab)	Secondary drain connection	Provides low-impedance, high-current path to heatsink; reduces thermal resistance and improves reliability under sustained load.

Key Features

Feature	Design Value
Logic-level gate drive compatibility	Guaranteed R_DS(on) ≤ 15 mΩ at V_GS = 4.5V - eliminates need for gate boosters in 5V or 3.3V control domains.
Optimized for CPU core VRMs	Die size and R_DS(on)/Q_g ratio tuned for 1–3 phase synchronous buck topologies powering Intel/AMD processors.
Robust avalanche ruggedness	220 mJ single-pulse and 8.9 mJ repetitive avalanche energy - protects against inductive kickback in unclamped circuits.
Fast body diode recovery	t_rr = 59–88 ns and Q_rr = 110–160 nC - reduces cross-conduction loss and EMI in synchronous rectification.
Low thermal resistance	R_θJC = 1.4 °C/W - allows >50W continuous dissipation with modest heatsinking, supporting compact VRM designs.

Applications

CPU Core Voltage Regulator

GPU Power Delivery

Use Scenario: High-current, multi-phase buck converter supplying dynamic 0.8–1.5V loads to desktop/server CPUs with rapid load transients up to 100A/µs.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier switch in interleaved buck stages, operating at 300–600 kHz with 4.5V gate drive.

Use Value: 13 mΩ R_DS(on) at 7V and 15 mΩ at 4.5V directly lowers conduction loss and thermal stress versus higher-threshold alternatives.

Use Scenario: Compact dual-phase VRM on graphics card PCB delivering up to 40A per phase to GPU cores under burst workloads.

IC Role / Device Role / Timing Role: High-current, low-R_DS(on) power switch handling peak currents ≥60A with minimal footprint and thermal margin.

Use Value: TO-220AB package provides proven mechanical robustness and thermal interface compatibility with standard GPU heatsinks.

Point-of-Load Converter

Industrial FPGA Power Supply

Use Scenario: Single-phase 12V-to-1.2V PoL regulator on server motherboard delivering 20–30A to memory controller or chipset.

IC Role / Device Role / Timing Role: Primary power FET in high-efficiency buck stage, driven by integrated controller with 4.5V logic-compatible output.

Use Value: Fast t_r/t_f (130/110 ns) and low C_oss (1000 pF) minimize switching loss and improve light-load efficiency.

Use Scenario: Reliable 20V-input, 1.0V-output power rail for Xilinx/Intel FPGAs in industrial control systems requiring long-term thermal stability.

IC Role / Device Role / Timing Role: Main switching element in thermally constrained, fanless FPGA power module operating continuously at 70°C ambient.

Use Value: 150°C max junction temperature and 0.71 W/°C derating enable full-rated current operation without forced air cooling.

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
IRL3803	R_DS(on) = 8.0 mΩ @ 10V, but 16 mΩ @ 4.5V; higher Q_g = 70 nC; same TO-220AB package.	Better conduction loss at higher gate drive; less suitable for strict 4.5V-only systems.	Prefer when gate drive can reach 7–10V and lower R_DS(on) outweighs gate drive complexity.
STP36NF20	V_DSS = 200V; R_DS(on) = 50 mΩ @ 10V; not logic-level - V_GS(th) = 2–4V, poor 4.5V performance.	Designed for higher-voltage industrial SMPS, not CPU VRMs.	Not recommended for 4.5V-driven, low-V_DSS applications - mismatched voltage class and drive requirement.

Compared with IRL3102, IRL3803 offers lower R_DS(on) at elevated gate voltage but requires more gate drive energy, while STP36NF20's 200V rating and weak 4.5V turn-on make it unsuitable for CPU core applications - confirming IRL3102's niche in logic-level, 20V, high-current VRM switching.

Availability

IRL3102 is available at Aetrix Electronics and suitable for CPU core voltage regulators, GPU power delivery modules, and industrial FPGA power supplies requiring stable component supply and long-lifecycle support.

Supply support for IRL3102 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 headquartered in Munich, Germany, specializing in power management, automotive, and industrial control ICs and discrete devices.

The IRL3102 belongs to Infineon's legacy HEXFET® logic-level Power MOSFET product line, engineered specifically for high-efficiency, high-current DC-DC conversion in computing infrastructure where 4.5V gate drive and thermal reliability are mandatory.

FAQ

Is the IRL3102 suitable for 3.3V gate drive applications?

No - the IRL3102 is specified down to 4.5V gate drive, with R_DS(on) = 15 mΩ typical at that level. At 3.3V, it remains partially enhanced but exhibits significantly higher on-resistance (>50 mΩ), leading to excessive conduction loss and thermal risk. It is not characterized or guaranteed for reliable operation below 4.5V.

What is the maximum continuous drain current at 100°C case temperature?

The IRL3102 supports 39 A continuous drain current at T_C = 100°C, as specified in its Absolute Maximum Ratings table. This derating reflects thermal limits of the TO-220AB package and internal die construction, and assumes proper heatsinking with R_θCS ≤ 0.50 °C/W.

Does the IRL3102 have avalanche rating for repetitive operation?

Yes - the IRL3102 is rated for repetitive avalanche with I_AR = 35 A and E_AR = 8.9 mJ under defined test conditions (T_J = 25°C, L = 0.36 mH, R_G = 25 Ω). This capability supports robustness in inductive switching environments such as buck converters with freewheeling diode stress.

Can the metal tab (Drain) be electrically connected to the PCB ground plane?

No - the metal tab is internally connected to the Drain terminal. Connecting it directly to PCB ground creates a short circuit unless the Drain node is at system ground potential. Electrical isolation via insulating pad and shoulder washer is required unless the application design explicitly references Drain to ground.

IRL3102 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:: 61A (Tc)

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

Rds On (Max) @ Id, Vgs:: 13mOhm @ 37A, 7V

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

Gate Charge (Qg) (Max) @ Vgs:: 58 nC @ 4.5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 2500 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 89W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

IRL3102 FAQ

1.How can I place an order for IRL3102 through Aetrix?

Please submit a Request for Quotation (RFQ) for IRL3102 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 IRL3102 reliable?

The price and inventory of IRL3102 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRL3102 is usually 5 days.

3.What payment methods are accepted for IRL3102?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRL3102 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRL3102?

IRL3102 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRL3102 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 IRL3102?

For technical support, including IRL3102 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRL3102 requirements.

6.How does Aetrix verify that IRL3102 is sourced from the original manufacturer or authorized distributors?

All IRL3102 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 IRL3102 meets industry standards.

7.What is the process for return or replacement of IRL3102?

All IRL3102 units undergo pre-shipment inspection (PSI). If there is an issue with IRL3102, 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 IRL3102 part is unused and in its original packaging.

Return procedure for IRL3102:

1.Submit a request within 90 days.

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

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