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

Infineon Technologies IRLU2905Z

Name: IRLU2905Z
Brand: Infineon Technologies
SKU: IRLU2905Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLU2905Z

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: IRLU2905Z.pdf

Description:: MOSFET N-CH 55V 42A I-PAK

Quantity:: RFQ Add To RFQ list

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Inventory:5,515

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Product details

Overview

IRLU2905Z from Infineon Technologies (formerly International Rectifier) is a logic-level N-channel enhancement-mode Power MOSFET in D-Pak (TO-252) package, rated for 55V V_DSS, 42A continuous drain current at T_C = 25°C, and 13.5mΩ R_DS(on) at V_GS = 10V. It features 175°C maximum junction temperature, fast switching (t_r = 130ns, t_f = 33ns), and rated repetitive avalanche capability-designed for high-efficiency DC-DC converters, motor control H-bridges, and industrial power switches.

For engineers reviewing the IRLU2905Z datasheet, IRLU2905Z pinout, IRLU2905Z application, or IRLU2905Z equivalent, key selection criteria include its logic-level gate drive compatibility (V_GS(th) = 1.0–3.0V), low R_DS(on) at 4.5V (22.5mΩ max), body diode recovery performance (t_rr = 22–33ns), and thermal robustness under pulsed load conditions.

Technical Context

This MOSFET employs HEXFET® advanced process technology to minimize conduction loss per unit area while maintaining rugged unclamped inductive switching behavior. Its gate charge profile (Q_g = 23–35nC, Q_gd = 12nC) supports efficient high-frequency PWM operation up to several hundred kHz in synchronous buck topologies.

The integrated body diode exhibits low forward voltage (V_SD = 1.3V max at I_S = 36A) and controlled reverse recovery (Q_rr = 14–21nC), enabling reliable operation in freewheeling paths without external Schottky supplementation in medium-power applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	55V - Maximum blocking voltage before avalanche; defines usable input range in 48V bus systems.
R_DS(on) @ V_GS = 10V	13.5mΩ max - Conduction loss of ≤2.4W at 42A; enables compact thermal design with minimal heatsinking.
R_DS(on) @ V_GS = 4.5V	22.5mΩ max - Ensures full enhancement from standard 3.3V/5V logic drivers without level-shifting.
Q_g	35nC max - Total gate charge determines driver strength requirement; compatible with low-power gate drivers (e.g., TC4427).
t_r/t_f	130ns / 33ns - Fast edge rates reduce switching losses in hard-switched SMPS operating at 200–500kHz.
E_AS	240mJ - Single-pulse avalanche energy rating allows safe operation during inductive turn-off transients without snubbers.
T_J max	175°C - Enables sustained operation in sealed enclosures or high-ambient industrial environments.

Pinout & Package

IRLU2905Z uses the D-Pak (TO-252) surface-mount package with exposed drain pad for enhanced thermal conduction. The package measures 6.73 × 6.22 × 2.39 mm and is optimized for PCB copper pour thermal relief.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (G)	Gate	Control terminal; accepts logic-level voltage (1.0–3.0V threshold); requires <100nF local decoupling for stable switching.
Pin 2 (S)	Source	Reference node for gate drive and current sensing; tied to power ground plane; internal source inductance = 7.5nH.
Pin 3 (D)	Drain	Main power output terminal; connected to exposed copper pad on bottom surface; handles 42A continuous via PCB thermal vias.

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced at V_GS = 4.5V, eliminating need for gate boosters in 5V microcontroller-driven systems.
Ultra-low R_DS(on)	13.5mΩ at 10V enables >96% efficiency in 12V→5V/20A buck converters at 300kHz.
Repetitive avalanche rated	Rated for unlimited repetitive avalanche events as long as T_J ≤ 175°C-critical for motor phase-leg fault tolerance.
Fast body diode recovery	t_rr = 22–33ns and Q_rr = 14–21nC reduce shoot-through risk and EMI in half-bridge freewheeling.
High-temperature operation	Guaranteed parametric performance up to 175°C junction-supports derated operation in automotive under-hood or industrial PLC modules.

Applications

Brushless DC Motor Control

Industrial DC-DC Converters

Use Scenario: Three-phase inverter stage driving 24–48V BLDC motors in HVAC blowers and automated valves.

IC Role / Device Role / Timing Role: Low-side switch in 6-step commutation; synchronized with gate driver ICs (e.g., IR2101) at 20kHz PWM frequency.

Use Value: Low R_DS(on) minimizes conduction loss across all six FETs; fast switching reduces dead-time distortion and torque ripple.

Use Scenario: Primary-side synchronous rectifier in isolated 48V-to-12V flyback or active-clamp forward converters for factory automation I/O modules.

IC Role / Device Role / Timing Role: Secondary-side power switch replacing Schottky diodes; driven by transformer-coupled or opto-isolated gate signals.

Use Value: 13.5mΩ R_DS(on) cuts rectifier loss by >50% vs. 40V Schottky, improving full-load efficiency from 89% to 93%.

LED Constant-Current Drivers

Power OR-ing Circuits

Use Scenario: High-current LED string dimming in architectural lighting using analog/PWM-controlled constant-current sinks.

IC Role / Device Role / Timing Role: Series pass element modulated at 1–5kHz; thermally coupled to aluminum heat sink via D-Pak drain pad.

Use Value: 175°C T_J rating allows direct mounting on extruded heatsinks without derating in enclosed luminaires.

Use Scenario: Redundant 24V power supply OR-ing in telecom shelf management and railway signaling cabinets.

IC Role / Device Role / Timing Role: Back-to-back configured as ideal diode; controlled by dedicated OR-ing controller (e.g., LTC4359).

Use Value: Low V_SD (1.3V) and fast reverse recovery prevent cross-conduction during supply switchover, reducing voltage droop to <50mV.

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
STP55NF06L	R_DS(on) = 14mΩ @ 10V; V_DSS = 60V; TO-220 package; higher Q_g (65nC)	Requires larger heatsink due to through-hole package; slower switching limits use above 100kHz.	Preferred where board space permits and cost sensitivity outweighs switching loss concerns.
IRFZ44NPBF	R_DS(on) = 28mΩ @ 10V; V_DSS = 55V; TO-220; no specified avalanche rating	Lacks repetitive avalanche qualification; unsuitable for inductive load interruption without snubbers.	Acceptable only in non-inductive, low-frequency (<50kHz) switching applications with conservative SOA margins.

Compared with STP55NF06L and IRFZ44NPBF, IRLU2905Z delivers superior switching efficiency at high frequencies, lower thermal resistance via D-Pak mounting, and guaranteed avalanche ruggedness-making it optimal for space-constrained, high-reliability industrial power stages.

Availability

IRLU2905Z is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC-DC converters, and LED lighting systems requiring stable component supply and long-term manufacturing continuity.

Supply support for IRLU2905Z 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive electronics, and industrial control solutions.

The IRLU series belongs to Infineon's legacy HEXFET® logic-level Power MOSFET product line, engineered specifically for high-current, medium-voltage switching in space-constrained industrial and consumer power supplies.

FAQ

Is IRLU2905Z RoHS-compliant and lead-free?

Yes, IRLU2905ZPbF is explicitly marked as lead-free (PbF) and complies with RoHS Directive 2011/65/EU. The "PbF" suffix confirms termination finish meets JEDEC J-STD-609 Class 1 requirements, with SnAgCu solderability verified per IPC-J-STD-006.

What is the recommended PCB layout for thermal performance?

Maximize copper area under the exposed drain pad using ≥6 thermal vias (0.3mm diameter, filled or plated) connecting to inner-layer ground planes. Maintain ≥1.5mm clearance from S/G pins to avoid solder bridging. Use 2oz copper on top/bottom layers for R_θJA ≤ 40°C/W in standard 1-in² pad layout.

Can IRLU2905Z be used in parallel configurations?

Yes-its positive temperature coefficient of R_DS(on) (see Fig.10) ensures inherent current sharing. Parallel operation requires matched gate drive impedance (<5Ω per device), symmetrical PCB trace lengths, and individual 10Ω gate resistors to suppress oscillation. Derate total current by 15% for thermal margin.

Does IRLU2905Z require a gate resistor for ESD protection?

No external gate resistor is required solely for ESD protection-the device incorporates integrated gate protection diodes. However, a 10–22Ω series gate resistor is recommended to dampen ringing, limit peak gate current during fast transitions, and improve EMC performance in high-dI/dt layouts.

IRLU2905Z Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 42A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 13.5mOhm @ 36A, 10V

Vgs(th) (Max) @ Id:: 3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 35 nC @ 5 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 1570 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 110W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: IPAK

IRLU2905Z FAQ

1.How can I place an order for IRLU2905Z through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLU2905Z 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 IRLU2905Z reliable?

The price and inventory of IRLU2905Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLU2905Z is usually 5 days.

3.What payment methods are accepted for IRLU2905Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLU2905Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLU2905Z?

IRLU2905Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLU2905Z 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 IRLU2905Z?

For technical support, including IRLU2905Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLU2905Z requirements.

6.How does Aetrix verify that IRLU2905Z is sourced from the original manufacturer or authorized distributors?

All IRLU2905Z 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 IRLU2905Z meets industry standards.

7.What is the process for return or replacement of IRLU2905Z?

All IRLU2905Z units undergo pre-shipment inspection (PSI). If there is an issue with IRLU2905Z, 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 IRLU2905Z part is unused and in its original packaging.

Return procedure for IRLU2905Z:

1.Submit a request within 90 days.

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

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