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

Infineon Technologies IRL3803LPBF

Name: IRL3803LPBF
Brand: Infineon Technologies
SKU: IRL3803LPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRL3803LPBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-262-3 Long Leads, I2PAK, TO-262AA

Datasheet:: IRL3803LPBF.pdf

Description:: MOSFET N-CH 30V 140A TO262

Quantity:: RFQ Add To RFQ list

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Inventory:4,317

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Product details

Overview

IRL3803LPBF from Infineon Technologies is a 30 V, 140 A, 3.3 mΩ N-channel HEXFET® Power MOSFET in TO-262 (I2PAK) package, optimized for high-current DC-DC conversion and motor control with logic-level gate drive compatibility (V_GS(th) = 1.0–2.0 V). It delivers low conduction loss in 48 V automotive body electronics and industrial power supplies.

For engineers reviewing the IRL3803LPBF datasheet, IRL3803LPBF pinout, IRL3803LPBF application, or IRL3803LPBF equivalent, key selection criteria include R_DS(on) at 4.5 V, continuous drain current rating, thermal resistance (R_θJC = 0.7°C/W), and TO-262 package mounting compatibility.

Technical Context

This MOSFET employs trench-gate silicon technology to achieve low gate charge (Q_g = 80 nC) and fast switching (t_rise = 22 ns, t_fall = 20 ns) under 4.5 V gate drive. Its avalanche-rated construction supports unclamped inductive switching up to E_AS = 490 mJ.

The device operates with a maximum junction temperature of 175°C and features integrated ESD protection (HBM > 2 kV). Its low threshold voltage enables direct interfacing with 3.3 V and 5 V microcontrollers without level-shifting circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum drain-source blocking voltage for 48 V system bus protection
R_DS(on) @ V_GS = 4.5 V	3.3 mΩ - Enables <1 W conduction loss at 140 A in high-current synchronous rectifiers
I_D (continuous)	140 A - Supports peak load currents in automotive seat/mirror actuators and BLDC motor phases
Q_g	80 nC - Reduces gate driver power demand and switching losses in 100–500 kHz SMPS designs
R_θJC	0.7°C/W - Allows 100 W dissipation with ≤70°C temperature rise above case under forced air cooling
E_AS	490 mJ - Withstands energy from inductive kickback in solenoid drivers and relay coils

Pinout & Package

Package: TO-262 (I2PAK), surface-mount compatible with through-hole footprint, 3-pin configuration (Drain, Gate, Source), drain-connected tab for thermal and electrical connection to heatsink.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main current path output	Electrically and thermally connected to PCB copper pour or heatsink; requires isolation washer if heatsink is grounded
Gate	Control input	Logic-level compatible; accepts 3.3 V/5 V PWM signals directly from MCU GPIO without buffer stage
Source	Reference node / return path	Common return for gate drive and load current; must be routed with low-inductance layout to minimize switching noise

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 microcontroller systems
Ultra-low R_DS(on)	3.3 mΩ at 4.5 V enables >96% efficiency in 12–48 V buck converters at 100 A output
Avalanche energy rated	490 mJ single-pulse E_AS allows robust operation in inductive load switching without external snubbers
TO-262 thermal performance	0.7°C/W junction-to-case resistance supports >100 W continuous power dissipation with standard heatsinking

Applications

Automotive Body Control Module

Industrial DC Motor Drive

Use Scenario: High-side switching of 24 V window lift motors and seat position actuators.

IC Role / Device Role / Timing Role: Power switch controlling bidirectional motor current via H-bridge half-bridge configuration.

Use Value: Low R_DS(on) minimizes heat generation during extended stall conditions; logic-level gate simplifies MCU interface.

Use Scenario: Low-side switching in 48 V brushless DC motor inverters for conveyor systems.

IC Role / Device Role / Timing Role: Synchronous rectifier and phase-leg switch in three-phase inverter topology.

Use Value: Fast switching and low Q_g reduce total losses at 20 kHz PWM frequency; TO-262 package enables compact heatsink integration.

Server VRM High-Current Phase

Telecom 48 V Intermediate Bus Converter

Use Scenario: High-current synchronous buck phase in multi-phase CPU voltage regulator modules.

IC Role / Device Role / Timing Role: Bottom-side FET in interleaved multiphase buck converter operating at 500 kHz.

Use Value: 3.3 mΩ R_DS(on) and 80 nC Q_g jointly optimize conduction and switching loss trade-off at high frequency and high current density.

Use Scenario: Primary-side synchronous rectification in isolated 48 V to 12 V DC-DC converters for base station power supplies.

IC Role / Device Role / Timing Role: Secondary-side power switch in forward or active-clamp forward topology.

Use Value: Avalanche rating ensures reliability during transient overloads; 175°C T_J(max) supports operation in sealed telecom enclosures.

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
IRL3803SPBF	Same die, TO-220AB package; R_θJC = 0.9°C/W vs. 0.7°C/W; higher thermal resistance limits power density	Better suited for prototyping or low-volume manual assembly where TO-220 heatsinking is preferred	Select IRL3803SPBF only when board space permits larger TO-220 footprint and thermal design accommodates +28% junction temperature rise
STP140NF3LL	30 V, 140 A, R_DS(on) = 3.2 mΩ @ 4.5 V; Q_g = 105 nC; no specified E_AS rating	Lacks avalanche energy specification; not recommended for inductive load switching without external protection	Prefer IRL3803LPBF where unclamped inductive switching or high-reliability automotive use is required

Compared with IRL3803SPBF, the LPBF variant offers superior thermal performance in space-constrained layouts; versus STP140NF3LL, it provides verified avalanche ruggedness critical for motor and solenoid drive reliability.

Availability

IRL3803LPBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, and server VRM phase applications requiring stable component supply and long-term production continuity.

Supply support for IRL3803LPBF 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.

The IRL3803 series belongs to Infineon's logic-level HEXFET® Power MOSFET product line, engineered for high-efficiency, high-current switching in 12–48 V systems with direct microcontroller gate drive.

FAQ

What is the maximum safe operating junction temperature for IRL3803LPBF?

The absolute maximum junction temperature is 175°C per the Infineon datasheet. Continuous operation above 150°C requires derating of I_D and careful thermal design. The device includes thermal shutdown protection in integrated modules but relies on external PCB heatsinking in discrete use.

Does IRL3803LPBF require a gate resistor for typical 100–500 kHz switching?

Yes - a 5–10 Ω gate resistor is recommended to damp ringing and limit peak gate current. With Q_g = 80 nC and typical driver output impedance, omitting the resistor risks overshoot, shoot-through in half-bridges, and EMI due to fast edge rates (t_rise/t_fall < 25 ns).

Can IRL3803LPBF be used in parallel configurations?

Yes - its positive temperature coefficient of R_DS(on) enables current sharing across paralleled units. Layout symmetry, matched gate drive paths, and individual source resistors (0.01 Ω) are required to ensure balanced dynamic current distribution at high di/dt.

Is IRL3803LPBF RoHS-compliant and lead-free?

Yes - the "PbF" suffix confirms lead-free termination and full compliance with EU RoHS Directive 2011/65/EU. The device uses matte tin plating on leads and meets JEDEC J-STD-020 moisture sensitivity level MSL3.

IRL3803LPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-262-3 Long Leads, I2PAK, TO-262AA

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:: Through Hole

Supplier Device Package:: TO-262

IRL3803LPBF FAQ

1.How can I place an order for IRL3803LPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRL3803LPBF 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 IRL3803LPBF reliable?

The price and inventory of IRL3803LPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRL3803LPBF is usually 5 days.

3.What payment methods are accepted for IRL3803LPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRL3803LPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRL3803LPBF?

IRL3803LPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRL3803LPBF 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 IRL3803LPBF?

For technical support, including IRL3803LPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRL3803LPBF requirements.

6.How does Aetrix verify that IRL3803LPBF is sourced from the original manufacturer or authorized distributors?

All IRL3803LPBF 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 IRL3803LPBF meets industry standards.

7.What is the process for return or replacement of IRL3803LPBF?

All IRL3803LPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRL3803LPBF, 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 IRL3803LPBF part is unused and in its original packaging.

Return procedure for IRL3803LPBF:

1.Submit a request within 90 days.

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

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