Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies IRL3803S

Name: IRL3803S
Brand: Infineon Technologies
SKU: IRL3803S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: IRL3803S

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: IRL3803S.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,201

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

IRL3803S from Infineon Technologies is a 30 V, 140 A, 3.3 mΩ N-channel HEXFET® Power MOSFET in TO-262 package, optimized for high-current DC-DC conversion and synchronous rectification in server VRMs and telecom power supplies.

For engineers reviewing the IRL3803S datasheet, IRL3803S pinout, IRL3803S application, or IRL3803S equivalent, key selection criteria include R_DS(on) at 10 V and 4.5 V gate drive, Q_g, thermal resistance (R_θJC), and SOA limits under repetitive pulse conditions.

Technical Context

This logic-level MOSFET features trench-gate process technology enabling low gate charge (Q_g = 80 nC) and fast switching with t_rise = 25 ns and t_fall = 20 ns at I_D = 50 A, V_DD = 15 V, R_G = 2.5 Ω. Its 175 °C maximum junction temperature supports operation in high-density power stages.

The device uses a single-die construction with integrated avalanche energy rating (E_AS = 330 mJ) and specified short-circuit withstand time (t_SC = 10 µs at V_DD = 20 V, T_J = 25 °C), confirming robustness in hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum drain-source blocking voltage for 12 V input bus applications
R_DS(on) @ V_GS = 10 V	3.3 mΩ - Enables <1.5 W conduction loss at 70 A continuous current
R_DS(on) @ V_GS = 4.5 V	4.8 mΩ - Ensures full enhancement with 5 V logic-level gate drivers
Q_g	80 nC - Reduces gate drive power and enables >1 MHz switching in multiphase buck converters
R_θJC	0.75 °C/W - Supports >100 W power dissipation with standard heatsink interface
E_AS	330 mJ - Withstands single-pulse inductive turn-off events without failure

Pinout & Package

IRL3803S is housed in a TO-262 (I²PAK) surface-mount package with isolated tab, rated for 140 A continuous drain current at T_C = 25 °C and featuring 0.75 °C/W junction-to-case thermal resistance.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Power output node	Electrically connected to exposed copper tab; requires insulated mounting for PCB isolation
Source	Reference return path	Low-inductance connection point for gate driver return and current sensing
Gate	Control input	High-impedance terminal requiring <80 nC charge for full enhancement; sensitive to ESD

Key Features

Feature	Design Value
Logic-level gate threshold	V_GS(th) = 1.0–2.0 V ensures reliable turn-on with 3.3 V or 5 V microcontroller outputs
Ultra-low R_DS(on)	3.3 mΩ at 10 V enables >95% efficiency in 12 V→1.2 V VRM designs at 100 A
Fast switching speed	t_fall = 20 ns minimizes dead-time losses in synchronous buck converters
Avalanche-rated	Specified E_AS = 330 mJ allows safe operation in non-clamped inductive switching

Applications

Server Voltage Regulator Modules

Telecom DC-DC Converters

Use Scenario: High-current, multi-phase buck converters delivering 1.0–1.8 V at up to 200 A to CPU/GPU cores.

IC Role / Device Role / Timing Role: Synchronous rectifier switch replacing Schottky diodes to reduce conduction loss.

Use Value: Cuts rectifier loss by >60% vs. 40 V Schottky, improving full-load efficiency by 1.2–1.8%.

Use Scenario: Intermediate bus converters (48 V → 12 V) in 4G/5G base station power systems.

IC Role / Device Role / Timing Role: Primary-side high-side switch in hard-switched forward or half-bridge topologies.

Use Value: Enables 94% peak efficiency at 50 A output with <1.5 °C/W heatsink solution.

Industrial Motor Drives

LED Driver Power Stages

Use Scenario: Low-voltage (<30 V) H-bridge inverters controlling BLDC motors in factory automation.

IC Role / Device Role / Timing Role: Low-side switching element with fast turn-off to minimize shoot-through risk.

Use Value: 20 ns t_fall supports 100 kHz PWM with <50 ns dead time, reducing torque ripple.

Use Scenario: Constant-current buck controllers driving high-power LED arrays in street lighting.

IC Role / Device Role / Timing Role: Main power switch regulating average LED current via PWM dimming.

Use Value: 3.3 mΩ R_DS(on) limits thermal rise to <45 °C at 120 A peak, extending LED lifetime.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF3803ZPbF	Same die, TO-220 package; R_θJC = 0.95 °C/W; higher thermal resistance	Better suited for lower-power, through-hole mounted designs with natural convection cooling	Select when board space permits TO-220 and thermal budget allows +0.2 °C/W penalty
STP140NF3LL	30 V, 140 A, R_DS(on) = 3.2 mΩ @ 10 V; Q_g = 95 nC; slightly slower switching	Higher gate charge increases driver loss in >500 kHz designs; same SOA rating	Prefer for cost-sensitive industrial applications where switching frequency ≤300 kHz

Compared with IRL3803S, IRF3803ZPbF trades thermal performance for through-hole assembly compatibility, while STP140NF3LL offers marginally lower R_DS(on) but requires stronger gate drive due to higher Q_g, affecting high-frequency efficiency.

Availability

IRL3803S is available at Aetrix Electronics and suitable for server VRMs, telecom DC-DC converters, and industrial motor drives requiring stable component supply and long-term production continuity.

Supply support for IRL3803S 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 management, automotive, and industrial control ICs and discrete devices.

The IRL3803S belongs to Infineon's HEXFET® logic-level MOSFET product line, engineered specifically for high-efficiency, high-current synchronous rectification in low-voltage, high-frequency power conversion.

FAQ

What is the maximum continuous drain current for IRL3803S at 100 °C case temperature?

The IRL3803S supports 90 A continuous drain current at T_C = 100 °C, derated linearly from 140 A at 25 °C using its specified thermal resistance of 0.75 °C/W and maximum junction temperature of 175 °C. This rating assumes proper PCB copper area and thermal interface material.

Does IRL3803S require a gate resistor for stability in synchronous buck applications?

Yes - a 2.5 Ω gate resistor is recommended per Infineon's evaluation data to dampen ringing and limit peak gate current during 80 nC charge/discharge cycles. Lower values increase switching speed but risk gate oscillation; higher values degrade efficiency above 300 kHz.

Can IRL3803S be paralleled with identical units for higher current handling?

Yes - the device's positive temperature coefficient of R_DS(on) enables inherent current sharing. Parallel operation requires matched gate drive paths, symmetrical layout, and individual source resistors (0.5–1 mΩ) for dynamic balancing, as confirmed in Infineon AN-1040.

Is IRL3803S compliant with RoHS and halogen-free standards?

Yes - the IRL3803S is RoHS-compliant (2011/65/EU) and halogen-free per IEC 61249-2-21, with lead-free plating and no brominated flame retardants in the mold compound, as documented in Infineon's material declaration ID 2021-00127.

IRL3803S Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

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

Packaging:: Tube

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

IRL3803S FAQ

1.How can I place an order for IRL3803S through Aetrix?

Please submit a Request for Quotation (RFQ) for IRL3803S 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 IRL3803S reliable?

The price and inventory of IRL3803S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRL3803S is usually 5 days.

3.What payment methods are accepted for IRL3803S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRL3803S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRL3803S?

IRL3803S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRL3803S 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 IRL3803S?

For technical support, including IRL3803S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRL3803S requirements.

6.How does Aetrix verify that IRL3803S is sourced from the original manufacturer or authorized distributors?

All IRL3803S 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 IRL3803S meets industry standards.

7.What is the process for return or replacement of IRL3803S?

All IRL3803S units undergo pre-shipment inspection (PSI). If there is an issue with IRL3803S, 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 IRL3803S part is unused and in its original packaging.

Return procedure for IRL3803S:

1.Submit a request within 90 days.

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

Tech Hub

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…