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

Vishay Siliconix IRLBA3803

Name: IRLBA3803
Brand: Vishay Siliconix
SKU: IRLBA3803
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: IRLBA3803

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: Super-220™

Datasheet:: IRLBA3803.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,978

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

Product details

Overview

IRLBA3803 from Infineon Technologies (formerly International Rectifier) is a logic-level N-channel HEXFET® Power MOSFET in Super-220 package, rated for 30 V V_DSS, 0.005 Ω R_DS(on) at 10 V_GS, 179 A continuous drain current at T_C = 25°C, and 175°C maximum junction temperature. It serves as a high-current, fast-switching power switch in DC-DC converters, motor drives, and battery protection circuits.

For engineers reviewing the IRLBA3803 datasheet, IRLBA3803 pinout, IRLBA3803 application, or IRLBA3803 equivalent, key selection considerations include its logic-level gate drive compatibility with 4.5 V microcontrollers, fully avalanche-rated ruggedness, TO-220-compatible mechanical outline with enhanced thermal performance, and automotive-grade Q101 qualification.

Technical Context

The IRLBA3803 employs fifth-generation HEXFET process technology to achieve ultra-low on-resistance per die area while maintaining fast switching (t_d(on) = 14 ns, t_f = 35 ns) and robust unclamped inductive switching capability (E_AS = 610 mJ). Its body diode exhibits t_rr = 120–180 ns and Q_rr = 450–680 nC under specified conditions.

Thermally, it features R_θJC = 0.55°C/W and supports linear derating of 1.8 W/°C above 25°C case temperature. The Super-220 package delivers higher current handling than TO-220 and matches TO-247 performance within a TO-220 footprint, validated for automotive Q101 compliance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	30 V - Maximum blocking voltage before avalanche conduction; defines safe operating range in 24 V systems.
R_DS(on)	0.005 Ω @ V_GS = 10 V - Enables <1 W conduction loss at 14 A, critical for high-efficiency power stages.
I_D (continuous)	179 A @ T_C = 25°C - High current capacity enables single-device replacement of paralleled TO-220 MOSFETs.
E_AS	610 mJ - Fully rated single-pulse avalanche energy supports reliable operation during inductive load turn-off transients.
Q_g	140 nC - Total gate charge determines driver strength requirement; compatible with standard logic-level gate drivers.
T_J max	+175°C - Extended junction temperature rating allows operation in high-ambient environments without derating.
dv/dt rating	5.0 V/ns - Minimum dv/dt immunity threshold for stable commutation in noisy power systems.

Pinout & Package

The IRLBA3803 is housed in the Super-220 package - a through-hole variant mechanically identical to TO-220 but optimized for higher current and thermal performance, qualified to AEC-Q101.

Pin/Terminal	Circuit Role	Design Meaning
Drain (D)	Main current-carrying terminal connected to silicon die backside	Electrically tied to metal tab; requires insulated mounting when referenced to non-ground potentials.
Source (S)	Return path for drain current; reference node for gate drive	Low-inductance source connection essential for minimizing switching oscillation and shoot-through risk.
Gate (G)	Control electrode modulating channel conductivity	Logic-level compatible (V_GS(th) = 1.0–2.0 V); requires low-impedance drive to manage 140 nC total charge efficiently.

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced at V_GS = 4.5 V, enabling direct interface with 3.3 V/5 V microcontrollers without level-shifting.
Fully avalanche rated	Guaranteed 610 mJ single-pulse avalanche energy eliminates need for external snubbers in inductive switching applications.
Super-220 package	TO-220 footprint with 30% higher current rating and 0.55°C/W junction-to-case thermal resistance vs. standard TO-220.
Automotive qualification	AEC-Q101 qualified for use in automotive cabin electronics, body control modules, and 12 V/24 V power distribution units.

Applications

Automotive Body Control Module	High-Current DC-DC Converter
Use Scenario: Switching 12 V battery power to headlights, HVAC blowers, and seat motors in modern vehicle platforms. IC Role / Device Role / Timing Role: Primary high-side or low-side power switch controlling load current up to 179 A peak. Use Value: Eliminates need for parallel MOSFETs due to 179 A rating and 0.005 Ω R_DS(on), reducing BOM count and PCB area.	Use Scenario: Synchronous rectification in 24 V input, 5 V/40 A output buck converter for industrial PLC power supplies. IC Role / Device Role / Timing Role: Low-side synchronous rectifier with fast 35 ns fall time and low Q_rr to minimize reverse recovery losses. Use Value: Achieves >95% efficiency at full load by reducing conduction and switching losses versus Schottky alternatives.
Battery Protection Circuit	Motor Drive Half-Bridge
Use Scenario: Overcurrent and short-circuit protection in 24 V lithium-ion battery packs for e-bikes and power tools. IC Role / Device Role / Timing Role: Main discharge FET with integrated overtemperature shutdown via 175°C TJ limit and fast fault response. Use Value: Withstands repetitive avalanche events during cell balancing or fault clearing, extending system reliability beyond standard MOSFETs.	Use Scenario: Low-side switch in 24 V brushed DC motor H-bridge driving 15 A stall current in automated gate actuators. IC Role / Device Role / Timing Role: Fast-turning, logic-level-controlled power stage with 14 ns turn-on delay for precise PWM timing control. Use Value: Enables 20 kHz PWM operation with minimal dead-time distortion due to predictable gate charge profile and low C_iss/C_rss ratio.

Automotive Body Control Module

High-Current DC-DC Converter

Use Scenario: Switching 12 V battery power to headlights, HVAC blowers, and seat motors in modern vehicle platforms.

IC Role / Device Role / Timing Role: Primary high-side or low-side power switch controlling load current up to 179 A peak.

Use Value: Eliminates need for parallel MOSFETs due to 179 A rating and 0.005 Ω R_DS(on), reducing BOM count and PCB area.

Use Scenario: Synchronous rectification in 24 V input, 5 V/40 A output buck converter for industrial PLC power supplies.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier with fast 35 ns fall time and low Q_rr to minimize reverse recovery losses.

Use Value: Achieves >95% efficiency at full load by reducing conduction and switching losses versus Schottky alternatives.

Battery Protection Circuit

Motor Drive Half-Bridge

Use Scenario: Overcurrent and short-circuit protection in 24 V lithium-ion battery packs for e-bikes and power tools.

IC Role / Device Role / Timing Role: Main discharge FET with integrated overtemperature shutdown via 175°C TJ limit and fast fault response.

Use Value: Withstands repetitive avalanche events during cell balancing or fault clearing, extending system reliability beyond standard MOSFETs.

Use Scenario: Low-side switch in 24 V brushed DC motor H-bridge driving 15 A stall current in automated gate actuators.

IC Role / Device Role / Timing Role: Fast-turning, logic-level-controlled power stage with 14 ns turn-on delay for precise PWM timing control.

Use Value: Enables 20 kHz PWM operation with minimal dead-time distortion due to predictable gate charge profile and low C_iss/C_rss ratio.

Equivalent & Alternatives

The following parts are listed as comparable options for similar power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRLB3803PBF	Same die, lead-free RoHS-compliant version; identical R_DS(on), Q_g, and avalanche rating.	No functional difference; suitable for new designs requiring RoHS compliance.	Select IRLB3803PBF for lead-free assembly; IRLBA3803 remains valid for legacy solder-plated requirements.
STP179N3LLH6	30 V, 179 A, R_DS(on) = 4.5 mΩ @ 10 V_GS; slightly lower Q_g (120 nC), no AEC-Q101 qualification.	Lacks automotive qualification and specified E_AS rating; not recommended for safety-critical or harsh-environment use.	Choose STP179N3LLH6 only for cost-sensitive industrial applications where automotive qualification is unnecessary.

Compared with IRLBA3803, IRLB3803PBF offers identical electrical and thermal performance with RoHS compliance, while STP179N3LLH6 trades automotive qualification and guaranteed avalanche ruggedness for marginally lower gate charge - making IRLBA3803 the preferred choice for automotive and mission-critical power switching.

Availability

IRLBA3803 is available at Aetrix Electronics and suitable for automotive body control modules, high-current DC-DC converters, and battery protection circuits requiring stable component supply across extended production lifecycles.

Supply support for IRLBA3803 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 acquired International Rectifier in 2015 and continues to manufacture and support the HEXFET® portfolio, a leader in high-performance power MOSFETs since the 1980s.

The IRLBA3803 belongs to the fifth-generation logic-level HEXFET family, engineered specifically for high-efficiency, high-reliability switching in automotive, industrial, and computing power systems where low R_DS(on), fast switching, and rugged avalanche performance are mandatory.

FAQ

What is the gate threshold voltage range for the IRLBA3803?

The IRLBA3803 has a gate threshold voltage V_GS(th) of 1.0 V minimum to 2.0 V maximum at I_D = 250 µA and V_DS = V_GS. This logic-level characteristic ensures full enhancement begins well below 3.3 V, allowing direct drive from most microcontrollers and gate drivers without level-shifting circuitry. The IRLBA3803 maintains stable conduction down to V_GS = 4.5 V, delivering its specified 0.009 Ω R_DS(on) at that voltage.

Is the IRLBA3803 suitable for surface-mount assembly?

No, the IRLBA3803 is not suitable for surface-mount assembly. It uses the Super-220 through-hole package, which is explicitly stated in the official documentation as "not recommended for Surface Mount Application." The device requires hole mounting with appropriate torque and thermal interface material for heatsink attachment. Attempting reflow or wave soldering will damage the package and void specifications.

Does the IRLBA3803 have an integrated body diode, and what are its key parameters?

Yes, the IRLBA3803 includes an integral reverse p–n junction body diode. Its forward voltage V_SD is 1.3 V at I_S = 71 A and T_J = 25°C with V_GS = 0 V. Reverse recovery time t_rr is 120–180 ns and Q_rr is 450–680 nC under test conditions of I_F = 71 A, di/dt = 100 A/µs, and T_J = 25°C. These values are critical for synchronous rectifier and freewheeling applications where diode recovery losses impact efficiency.

What thermal resistance values apply to the IRLBA3803 in its Super-220 package?

The IRLBA3803 has a junction-to-case thermal resistance R_θJC of 0.55°C/W and a junction-to-ambient value R_θJA of 58°C/W. The case-to-sink resistance R_θCS is 0.5°C/W when mounted on a flat, greased surface. These values enable accurate thermal design: for example, at 100 W dissipation and 25°C ambient, a properly heatsinked IRLBA3803 reaches ~100°C junction temperature, well within its 175°C limit.

Can the IRLBA3803 replace multiple paralleled TO-220 MOSFETs in high-current designs?

Yes, the IRLBA3803 is specifically designed to replace paralleled TO-220 devices. With 179 A continuous current rating and 0.005 Ω R_DS(on), it delivers higher current density and lower thermal impedance than typical TO-220 MOSFETs. Its Super-220 package provides TO-220 mechanical compatibility while offering TO-247-level performance - reducing component count, PCB space, and interconnect inductance in applications like motor drives and battery switches.

IRLBA3803 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Package/Case:: Super-220™

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

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):: 4.5V, 10V

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):: ±16V

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)

IRLBA3803 FAQ

1.How can I place an order for IRLBA3803 through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLBA3803 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 IRLBA3803 reliable?

The price and inventory of IRLBA3803 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLBA3803 is usually 5 days.

3.What payment methods are accepted for IRLBA3803?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLBA3803 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLBA3803?

IRLBA3803 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLBA3803 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 IRLBA3803?

For technical support, including IRLBA3803 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLBA3803 requirements.

6.How does Aetrix verify that IRLBA3803 is sourced from the original manufacturer or authorized distributors?

All IRLBA3803 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 IRLBA3803 meets industry standards.

7.What is the process for return or replacement of IRLBA3803?

All IRLBA3803 units undergo pre-shipment inspection (PSI). If there is an issue with IRLBA3803, 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 IRLBA3803 part is unused and in its original packaging.

Return procedure for IRLBA3803:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …