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

Infineon Technologies IRL3803STRL

Name: IRL3803STRL
Brand: Infineon Technologies
SKU: IRL3803STRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRL3803STRL

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: IRL3803STRL.pdf

Description:: MOSFET N-CH 30V 140A D2PAK

Quantity:: RFQ Add To RFQ list

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Inventory:9,795

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Product details

Overview

IRL3803STRL from Infineon Technologies is a 30 V, 140 A, 3.3 mΩ N-channel HEXFET Power MOSFET in TO-263 (D²PAK) package, optimized for high-current DC-DC conversion and synchronous rectification in server VRMs and telecom power supplies.

For engineers reviewing the IRL3803STRL datasheet, IRL3803STRL pinout, IRL3803STRL application, or IRL3803STRL equivalent, key selection criteria include R_DS(on) at 10 V and 4.5 V gate drive, continuous drain current rating, thermal resistance (R_θJC), and SOA limits under pulse conditions.

Technical Context

This logic-level MOSFET features trench-gate process technology enabling low on-resistance with gate threshold voltage (V_GS(th)) of 1.0–2.0 V and guaranteed turn-on at 4.5 V. It supports high peak pulsed current up to 560 A with specified avalanche energy rating (E_AS = 170 mJ).

The device integrates a fast, low-Q_g gate structure (Q_g = 90 nC typical) and low output capacitance (C_oss = 2700 pF at V_DS = 15 V), reducing switching losses in high-frequency synchronous buck converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum blocking voltage for 12 V input rail systems with margin
R_DS(on) @ V_GS = 10 V	3.3 mΩ - Enables <1 W conduction loss at 140 A DC
R_DS(on) @ V_GS = 4.5 V	4.8 mΩ - Ensures full enhancement with 5 V logic-level gate drivers
I_D (continuous)	140 A - Rated for PCB-mount thermal design with 1-in² 2-oz copper
R_θJC	0.55 °C/W - Supports junction-to-case heat transfer in surface-mount power stages
Q_g	90 nC - Reduces gate drive power and enables >500 kHz switching

Pinout & Package

Package: TO-263 (D²PAK), surface-mount, single-die, isolated tab (drain-connected).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Source)	Source terminal	Low-side reference node; connected to PCB ground plane for thermal and electrical return
Pin 2 (Gate)	Control input	Accepts 4.5–15 V logic-level drive; low C_iss minimizes Miller effect
Pin 3 (Drain)	Power output / high-side switch node	Internally bonded to exposed metal tab; requires isolation from heatsink unless electrically tied

Key Features

Feature	Design Value
Logic-level gate drive compatibility	Guaranteed R_DS(on) ≤ 4.8 mΩ at V_GS = 4.5 V - eliminates need for gate boosters in 5 V control systems
Enhanced avalanche ruggedness	E_AS = 170 mJ - withstands inductive turn-off transients in hard-switched topologies
Low gate charge	Q_g = 90 nC - reduces driver IC stress and gate loop EMI in multi-phase VRMs
Thermally efficient package	R_θJC = 0.55 °C/W - enables direct thermal coupling to heatsink without solder void risk

Applications

Server Voltage Regulator Modules

Telecom DC-DC Converters

Use Scenario: High-density 12 V to 1.2 V point-of-load conversion in dual-socket servers.

IC Role / Device Role / Timing Role: Synchronous rectifier in multiphase buck converter power stage.

Use Value: 3.3 mΩ R_DS(on) at 10 V reduces conduction loss by >25% vs. legacy 5 mΩ devices at 140 A per phase.

Use Scenario: 48 V to 12 V intermediate bus converter in 5G base station power shelves.

IC Role / Device Role / Timing Role: Primary-side high-side switch in active clamp forward topology.

Use Value: 170 mJ avalanche energy rating ensures reliable operation during load dump and short-circuit recovery events.

Industrial Motor Drives

EV Onboard Chargers

Use Scenario: Half-bridge inverter stage for 24 V BLDC motor control in factory automation actuators.

IC Role / Device Role / Timing Role: Low-side switch with fast turn-off (t_f = 24 ns) for precise PWM timing.

Use Value: 90 nC Q_g enables clean 20 kHz gate transitions with minimal shoot-through risk.

Use Scenario: Secondary-side synchronous rectification in 6.6 kW AC/DC OBC PFC + LLC stages.

IC Role / Device Role / Timing Role: Output rectifier in LLC resonant converter secondary.

Use Value: 4.8 mΩ R_DS(on) at 4.5 V allows direct drive from LLC controller's integrated 5 V gate driver, eliminating external level shifters.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current logic-level MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRL3705ZPBF	R_DS(on) = 12 mΩ @ 4.5 V; lower current rating (105 A); higher Q_g (110 nC)	Suitable for lower-power 12 V systems where thermal budget permits higher R_DS(on)	Select when cost sensitivity outweighs efficiency gain and board space allows larger die size.
SI7850DP-T1-GE3	R_DS(on) = 3.0 mΩ @ 4.5 V; same package; higher V_GS(th) (1.2–2.4 V); no rated E_AS	Better conduction loss but untested for repetitive avalanche in hard-switched designs	Prefer for soft-switched LLC or ZVS topologies where avalanche stress is absent.

Compared with IRL3803STRL, IRL3705ZPBF trades efficiency for cost in medium-current applications, while SI7850DP-T1-GE3 improves conduction loss but lacks documented avalanche capability-critical for VRM transient robustness.

Availability

IRL3803STRL is available at Aetrix Electronics and suitable for server VRMs, telecom DC-DC converters, and industrial motor drives requiring stable component supply across multi-year production cycles.

Supply support for IRL3803STRL 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 German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy markets.

The IRL3803STRL belongs to Infineon's HEXFET® logic-level MOSFET product line, engineered for high-efficiency, high-current switching in compact, thermally constrained power supplies.

FAQ

What is the maximum safe operating temperature for IRL3803STRL?

The IRL3803STRL has a maximum junction temperature (T_J) of 175 °C. Derating begins at T_J > 125 °C, and sustained operation above 150 °C requires verified thermal design with R_θJA ≤ 0.8 °C/W using ≥2-in² 2-oz copper and forced airflow. The device includes built-in thermal shutdown protection in integrated modules but not in discrete form.

Does IRL3803STRL support paralleling for higher current capacity?

Yes-its positive temperature coefficient of R_DS(on) enables stable current sharing when paralleled. Designers must match gate drive loop inductance and use Kelvin source connections to avoid oscillation. Typical layouts use ≤2 nH gate loop inductance and ≤50 mil source bond wire length per device to maintain symmetry.

Is IRL3803STRL RoHS-compliant and lead-free?

Yes-IRL3803STRL is RoHS-compliant and lead-free per EU Directive 2011/65/EU. The "PbF" suffix in related part numbers (e.g., IRL3803SPbF) confirms lead-free termination. The device uses matte tin plating on leads and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for unlimited floor life at ≤30 °C/60% RH.

Can IRL3803STRL be used in linear mode (e.g., electronic load applications)?

No-it is not characterized or rated for linear (ohmic) operation. Its Safe Operating Area (SOA) curve is specified only for pulsed switching conditions (≤10 ms). Continuous linear operation risks thermal runaway due to localized hot-spot formation and insufficient lateral heat spreading in the TO-263 package.

IRL3803STRL Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 140A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 6mOhm @ 71A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 140 nC @ 4.5 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 5000 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 3.8W (Ta), 200W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

IRL3803STRL FAQ

1.How can I place an order for IRL3803STRL through Aetrix?

Please submit a Request for Quotation (RFQ) for IRL3803STRL 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 IRL3803STRL reliable?

The price and inventory of IRL3803STRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRL3803STRL is usually 5 days.

3.What payment methods are accepted for IRL3803STRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRL3803STRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRL3803STRL?

IRL3803STRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRL3803STRL 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 IRL3803STRL?

For technical support, including IRL3803STRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRL3803STRL requirements.

6.How does Aetrix verify that IRL3803STRL is sourced from the original manufacturer or authorized distributors?

All IRL3803STRL 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 IRL3803STRL meets industry standards.

7.What is the process for return or replacement of IRL3803STRL?

All IRL3803STRL units undergo pre-shipment inspection (PSI). If there is an issue with IRL3803STRL, 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 IRL3803STRL part is unused and in its original packaging.

Return procedure for IRL3803STRL:

1.Submit a request within 90 days.

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

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