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

Infineon Technologies IRL3803STRLPBF

Name: IRL3803STRLPBF
Brand: Infineon Technologies
SKU: IRL3803STRLPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRL3803STRLPBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: IRL3803STRLPBF.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:9,233

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Product details

Overview

IRL3803STRLPBF from Infineon Technologies is a 30V, 140A N-channel HEXFET Power MOSFET in TO-263 (D²PAK) package, featuring 3.3 mΩ R_DS(on) at V_GS = 10 V, 170 W P_D, and logic-level gate drive compatibility. It serves as a high-current synchronous rectifier or main switch in DC-DC converters for server VRMs.

For engineers reviewing the IRL3803STRLPBF datasheet, IRL3803STRLPBF pinout, IRL3803STRLPBF application, or IRL3803STRLPBF equivalent, key selection criteria include R_DS(on) at 4.5 V, SOA under repetitive pulse conditions, thermal resistance R_θJC, and gate charge Q_g for high-frequency switching efficiency.

Technical Context

This MOSFET employs planar stripe cell technology with optimized gate oxide thickness to support 4.5 V logic-level turn-on while maintaining avalanche ruggedness. Its low gate threshold voltage (V_GS(th) = 1.0–2.0 V) enables direct interfacing with 3.3 V microcontrollers without level-shifting circuitry.

The device is characterized for operation up to T_J = 175 °C and features fully rated avalanche energy (E_AS = 390 mJ), making it suitable for hard-switched topologies where transient overvoltage events occur during commutation.

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 20 A continuous drain current
R_DS(on) @ V_GS = 4.5 V	4.8 mΩ - Ensures full enhancement with 3.3 V logic drivers in POL converters
Q_g	85 nC - Determines gate driver power requirement and switching transition time
R_θJC	0.85 °C/W - Defines junction-to-case thermal path efficiency with standard soldered heatsink interface
E_AS	390 mJ - Specifies single-pulse avalanche energy handling capability without failure

Pinout & Package

Package: TO-263 (D²PAK), surface-mount, copper leadframe with exposed drain pad for thermal and electrical connection.

Pin/Terminal	Circuit Role	Design Meaning
Gate (G)	Control terminal	Receives logic-level voltage to modulate channel conductivity; requires <85 nC charge for full turn-on
Drain (D)	High-current output node	Connected to exposed metal tab; must be electrically and thermally tied to PCB ground plane
Source (S)	Reference node / return path	Serves as common reference for gate drive and load current return; defines V_GS measurement point

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced at V_GS = 4.5 V, eliminating need for gate driver ICs in 3.3 V control systems
Low R_DS(on)	3.3 mΩ at 10 V ensures <1.3 W conduction loss at 20 A, reducing heatsink requirements
Avalanche-rated	Specified E_AS = 390 mJ supports reliable operation in non-zero-voltage-switching circuits
TO-263 thermal performance	R_θJC = 0.85 °C/W enables >100 W power dissipation with moderate heatsinking

Applications

Server VRM High-Side Switch

Industrial DC-DC Converter

Use Scenario: Primary switching element in multiphase buck converters supplying CPU core voltage (0.8–1.2 V) from 12 V input.

IC Role / Device Role / Timing Role: High-side synchronous rectifier controlled by PWM controller with 500 kHz–1 MHz switching frequency.

Use Value: Low R_DS(on) and Q_g minimize conduction and switching losses, improving VRM efficiency above 92% at full load.

Use Scenario: Main power switch in isolated forward or half-bridge DC-DC modules for programmable logic controllers.

IC Role / Device Role / Timing Role: Primary-side switch operating with 100–300 kHz fixed-frequency PWM and active clamp reset.

Use Value: Avalanche rating allows safe operation during transformer leakage inductance spikes without snubber networks.

Telecom Rectifier Module

Automotive 12 V Bus Switch

Use Scenario: Output synchronous rectifier in 48 V to 12 V intermediate bus converter for base station power shelves.

IC Role / Device Role / Timing Role: Low-side switch driven by dedicated gate driver with adaptive dead-time control.

Use Value: 4.8 mΩ R_DS(on) at 4.5 V enables direct drive from FPGA I/O banks, reducing BOM count.

Use Scenario: Load switch controlling high-current accessories (e.g., ADAS cameras, infotainment displays) on automotive 12 V battery rail.

IC Role / Device Role / Timing Role: Single-pole, single-throw solid-state switch with integrated gate resistor and thermal shutdown feedback.

Use Value: Rated for 175 °C junction temperature and qualified per AEC-Q101, supporting under-hood deployment.

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	R_DS(on) = 3.0 mΩ @ 10 V; higher Q_g = 105 nC; TO-220 package	Limited to lower-frequency (<300 kHz) designs due to higher gate charge and inferior thermal interface	Select when board space permits TO-220 and thermal mass reduces peak T_J more than D²PAK solder joint can achieve
IPB033N04LGATMA1	R_DS(on) = 3.3 mΩ @ 10 V; 40 V V_DS; PG-HSOF-8 package; 50% lower Q_g	Requires gate driver with negative turn-off capability; not logic-level compatible at 3.3 V	Prefer for new designs targeting >1 MHz switching and requiring tighter gate control, provided driver supports bipolar gate bias

Compared with IRL3803STRLPBF, IRF3803ZPBF trades higher thermal mass for reduced R_DS(on) but sacrifices high-frequency efficiency, while IPB033N04LGATMA1 delivers superior switching performance at the cost of gate drive complexity and voltage derating.

Availability

IRL3803STRLPBF is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, telecom rectifier modules, and automotive 12 V bus switches requiring stable component supply and long-term production continuity.

Supply support for IRL3803STRLPBF 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 electronics, and industrial control ICs and discrete devices.

This part belongs to Infineon's legacy HEXFET Power MOSFET product line, engineered for high-efficiency, high-current switching in computing and communications infrastructure power supplies.

FAQ

What is the maximum continuous drain current for IRL3803STRLPBF at 100°C case temperature?

The maximum continuous drain current is 90 A at T_C = 100 °C, derated linearly from 140 A at T_C = 25 °C using the specified R_DS(on) temperature coefficient and thermal resistance. This rating assumes proper PCB copper area and solder coverage on the exposed drain pad.

Does IRL3803STRLPBF require a gate resistor for stability in high-frequency switching?

Yes - a 5–10 Ω series gate resistor is recommended to dampen ringing caused by gate loop inductance and Miller capacitance interaction. Without it, overshoot exceeding 20 V may occur during fast turn-off, risking gate oxide damage despite the 20 V absolute maximum rating.

Can IRL3803STRLPBF be used in parallel configurations for higher current capacity?

Yes - its positive temperature coefficient of R_DS(on) enables inherent current sharing. Parallel operation requires matched layout symmetry, identical gate drive paths, and thermal coupling via shared heatsink or copper pour to ensure balanced junction temperatures within ±5 °C.

Is IRL3803STRLPBF compliant with RoHS and halogen-free standards?

Yes - the "PBF" suffix confirms lead-free termination and RoHS compliance per Directive 2011/65/EU. The device also meets JEDEC JS709B halogen-free requirements, with chlorine and bromine content below 900 ppm each and total halogens under 1500 ppm.

IRL3803STRLPBF 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

IRL3803STRLPBF FAQ

1.How can I place an order for IRL3803STRLPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRL3803STRLPBF 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 IRL3803STRLPBF reliable?

The price and inventory of IRL3803STRLPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRL3803STRLPBF is usually 5 days.

3.What payment methods are accepted for IRL3803STRLPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRL3803STRLPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRL3803STRLPBF?

IRL3803STRLPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRL3803STRLPBF 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 IRL3803STRLPBF?

For technical support, including IRL3803STRLPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRL3803STRLPBF requirements.

6.How does Aetrix verify that IRL3803STRLPBF is sourced from the original manufacturer or authorized distributors?

All IRL3803STRLPBF 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 IRL3803STRLPBF meets industry standards.

7.What is the process for return or replacement of IRL3803STRLPBF?

All IRL3803STRLPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRL3803STRLPBF, 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 IRL3803STRLPBF part is unused and in its original packaging.

Return procedure for IRL3803STRLPBF:

1.Submit a request within 90 days.

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

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