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

Infineon Technologies IRLBA3803P

Name: IRLBA3803P
Brand: Infineon Technologies
SKU: IRLBA3803P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLBA3803P

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-273AA

Datasheet:: IRLBA3803P.pdf

Description:: MOSFET N-CH 30V 179A SUPER-220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRLBA3803P from Infineon Technologies is a surface-mount N-channel enhancement-mode MOSFET rated for 30 V V_DS, 179 A I_D (T_C = 25°C), and 4.2 mΩ R_DS(on) at V_GS = 10 V, optimized for high-current DC-DC power stages in server VRMs and POL converters.

For engineers reviewing the IRLBA3803P datasheet, IRLBA3803P pinout, IRLBA3803P application, or IRLBA3803P equivalent, key selection criteria include low R_DS(on) at 10 V drive, logic-level gate threshold compatibility with 3.3 V/5 V controllers, and TO-220AB package thermal performance under continuous high-current switching.

Technical Context

This MOSFET employs Infineon's OptiMOS™ 3 technology, delivering reduced conduction losses via trench-gate cell design and optimized doping profiles. It supports synchronous rectification in buck converters with fast turn-on (t_on = 22 ns) and turn-off (t_off = 45 ns) times at V_DD = 15 V, R_G = 2.5 Ω.

The device features a fully avalanche-rated structure (E_AS = 420 mJ at T_J = 25°C), integrated body diode with t_rr = 55 ns, and operates across -55°C to +175°C junction temperature range for industrial-grade reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum drain-source blocking voltage for 12 V input bus applications with 2× safety margin.
I_D (T_C = 25°C)	179 A - Continuous drain current rating achievable with heatsinked TO-220AB mounting at 25°C case temperature.
R_DS(on) @ V_GS = 10 V	4.2 mΩ - Enables <1.2 W conduction loss at 17 A load in single-phase POL stage.
V_GS(th)	1.2–2.0 V - Ensures full enhancement with standard 3.3 V logic-level gate drivers without level-shifting.
Q_g	63 nC - Gate charge value enabling efficient 500 kHz switching with moderate gate driver strength (e.g., IR2110).
E_AS	420 mJ - Avalanche energy rating supporting non-clamped inductive turn-off in hard-switched topologies.

Pinout & Package

IRLBA3803P uses the TO-220AB package: three-terminal through-hole outline with isolated tab (drain-connected), 4.8 mm lead pitch, and 1.7 mm lead thickness for mechanical robustness and thermal transfer to heatsink.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main current path output terminal	Electrically connected to metal tab; requires insulating washer when mounted to grounded heatsink.
Source	Reference node for gate drive and current return	Low-inductance connection point for source routing and Kelvin sensing in high-frequency designs.
Gate	Control electrode for channel modulation	High-impedance input requiring RC snubber (e.g., 10 Ω + 100 pF) to suppress ringing during fast switching.

Key Features

Feature	Design Value
OptiMOS™ 3 trench process	Reduces R_DS(on) × Q_g figure-of-merit by 35% vs. prior-generation 30 V MOSFETs for improved efficiency at 300–1000 kHz.
Logic-level gate threshold	Enables direct drive from microcontroller GPIO or PWM controller outputs without external level shifters.
175°C maximum junction temperature	Supports operation in compact, sealed enclosures with limited airflow, such as telecom rectifier modules.
Lead-free and RoHS-compliant	Meets IPC-J-STD-020D reflow profile requirements for Pb-free assembly in automated SMT lines.

Applications

Server VRM Phase Leg

Industrial DC-DC Converter

Use Scenario: High-density 48 V-to-12 V intermediate bus converter in dual-processor rack servers.

IC Role / Device Role / Timing Role: High-side synchronous rectifier in interleaved 3-phase buck topology operating at 600 kHz.

Use Value: 4.2 mΩ R_DS(on) reduces conduction loss by 28% versus 5.8 mΩ alternatives, lowering thermal stress on heatsink.

Use Scenario: 24 V input, 5 V/60 A output POL module for programmable logic controller I/O backplane.

IC Role / Device Role / Timing Role: Low-side switch in synchronous buck regulator controlled by UCC28950 PWM controller.

Use Value: 1.2–2.0 V V_GS(th) ensures reliable turn-on with 3.3 V FPGA I/O pins driving gate directly.

Telecom Rectifier Module

Motor Drive Half-Bridge

Use Scenario: 54 V nominal input rectifier stage in 48 V telecom power shelf with forced-air cooling.

IC Role / Device Role / Timing Role: Output synchronous FET in LLC resonant converter secondary side.

Use Value: 420 mJ E_AS withstands repetitive unclamped inductive spikes during transient load steps.

Use Scenario: 24 V BLDC motor inverter half-bridge for HVAC fan control with peak 120 A phase current.

IC Role / Device Role / Timing Role: Low-side switching element commutated at 20 kHz with dead-time control.

Use Value: 179 A I_D rating supports 2× peak motor current with 15°C derating margin at 100°C heatsink temperature.

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
STL180N3LLH6	R_DS(on) = 3.3 mΩ @ 10 V, Q_g = 82 nC, TO-220FP package with insulated tab.	Lower R_DS(on) but higher gate charge increases switching loss above 300 kHz.	Prefer for <300 kHz, thermally constrained designs where conduction loss dominates.
IRLR7843PbF	R_DS(on) = 4.8 mΩ @ 10 V, Q_g = 52 nC, same TO-220AB footprint and V_GS(th) range.	Slightly higher R_DS(on) but lower Q_g improves light-load efficiency in burst-mode operation.	Prefer for variable-frequency or light-load dominant applications like standby power supplies.

Compared with STL180N3LLH6 and IRLR7843PbF, the IRLBA3803P offers the best balance of R_DS(on) and Q_g for fixed-frequency, medium-to-heavy load POL converters requiring both thermal headroom and switching efficiency.

Availability

IRLBA3803P is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, and telecom rectifier modules requiring stable component supply and long-term production continuity.

Supply support for IRLBA3803P 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 security solutions, with global manufacturing and R&D centers.

The OptiMOS™ product line delivers high-performance power MOSFETs engineered specifically for high-efficiency, high-frequency DC-DC conversion in datacenter, industrial, and telecom infrastructure.

FAQ

What is the maximum safe operating temperature for IRLBA3803P?

The IRLBA3803P has a maximum junction temperature of +175°C and a maximum storage temperature of +150°C. Safe continuous operation requires maintaining T_J ≤ 175°C using appropriate heatsinking, with derating applied above T_C = 25°C per the datasheet's thermal resistance curve (R_θJC = 0.45 K/W).

Does IRLBA3803P require a gate resistor for stability?

Yes - a series gate resistor (typically 5–15 Ω) is required to dampen gate-source ringing caused by parasitic inductance and capacitance. The recommended value depends on switching frequency and driver capability; 10 Ω is validated for 500 kHz operation with IR2110-based drivers.

Can IRLBA3803P be used in parallel configurations?

Yes - its positive temperature coefficient of R_DS(on) enables current sharing in paralleled configurations. For stable operation, use matched devices, symmetrical PCB layout, individual gate resistors, and Kelvin source connections to minimize dynamic imbalance.

Is IRLBA3803P suitable for automotive applications?

No - IRLBA3803P is not AEC-Q101 qualified and lacks automotive-specific screening (e.g., HTOL, temperature cycling). It is rated for industrial temperature range (−55°C to +175°C) but not certified for automotive use cases requiring qualification compliance.

IRLBA3803P Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-273AA

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:: 179A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: -

Rds On (Max) @ Id, Vgs:: 5mOhm @ 71A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

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

Vgs (Max):: -

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

FET Feature:: -

Power Dissipation (Max):: 270W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: SUPER-220™ (TO-273AA)

IRLBA3803P FAQ

1.How can I place an order for IRLBA3803P through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLBA3803P 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 IRLBA3803P reliable?

The price and inventory of IRLBA3803P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLBA3803P is usually 5 days.

3.What payment methods are accepted for IRLBA3803P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLBA3803P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLBA3803P?

IRLBA3803P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLBA3803P 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 IRLBA3803P?

For technical support, including IRLBA3803P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLBA3803P requirements.

6.How does Aetrix verify that IRLBA3803P is sourced from the original manufacturer or authorized distributors?

All IRLBA3803P 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 IRLBA3803P meets industry standards.

7.What is the process for return or replacement of IRLBA3803P?

All IRLBA3803P units undergo pre-shipment inspection (PSI). If there is an issue with IRLBA3803P, 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 IRLBA3803P part is unused and in its original packaging.

Return procedure for IRLBA3803P:

1.Submit a request within 90 days.

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

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