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

Infineon Technologies IRLZ44NL

Name: IRLZ44NL
Brand: Infineon Technologies
SKU: IRLZ44NL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLZ44NL

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: IRLZ44NL.pdf

Description:: MOSFET N-CH 55V 47A TO262

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRLZ44NL from Infineon Technologies is a logic-level N-channel enhancement-mode MOSFET in TO-262 (D-Pak) package, rated for 55 V V_DS, 47 A continuous drain current at T_C = 25°C, and 20 mΩ typical R_DS(on) at V_GS = 10 V. It serves as a high-efficiency power switch in DC motor drives, battery-powered inverters, and solid-state relay replacements.

For engineers reviewing the IRLZ44NL datasheet, IRLZ44NL pinout, IRLZ44NL application, or IRLZ44NL equivalent, key selection criteria include its 2.5 V gate threshold enabling direct microcontroller drive, low conduction loss at 41 A, robust avalanche energy rating (E_AS = 190 mJ), and lead-free TO-262 thermal performance suitable for industrial switching designs.

Technical Context

This MOSFET employs planar stripe cell technology with optimized gate oxide thickness to achieve low R_DS(on) while maintaining >55 V breakdown voltage. Its body diode exhibits 1.3 V forward drop at 41 A and 25°C, with reverse recovery time t_rr = 80 ns under specified test conditions (I_F = 41 A, di/dt = 100 A/µs).

The device operates with gate drive voltages from 2.5 V to 15 V, delivering full enhancement at V_GS ≥ 4.5 V. Thermal resistance R_θJC is 1.0°C/W, supporting sustained 47 A operation when mounted on a 1-in² 2-oz copper pad with thermal vias.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V - Maximum blocking voltage before avalanche onset; supports 48 V nominal bus systems with 15% margin.
R_DS(on) @ V_GS=10 V	20 mΩ typical - Enables ≤0.4 W conduction loss at 41 A, reducing heatsink requirements.
I_D continuous @ T_C=25°C	47 A - Sustained current capability with standard TO-262 mounting; derates to 28 A at T_C=100°C.
V_GS(th)	2.0–3.0 V - Ensures full turn-on with 3.3 V GPIO outputs without level-shifting circuitry.
Q_g	58 nC - Gate charge value defining required driver current for 100 ns switching transitions at 10 V drive.
E_AS	190 mJ - Single-pulse avalanche energy rating; allows safe inductive load switching without snubbers.
R_θJC	1.0°C/W - Junction-to-case thermal resistance; enables 125°C junction temperature rise with 125 W power dissipation.

Pinout & Package

IRLZ44NL uses a 3-pin TO-262 (D-Pak) surface-mount package with exposed drain tab for thermal and electrical connection. The plastic body measures 10.4 × 4.6 × 9.25 mm (0.409 × 0.181 × 0.364 in), and the drain tab occupies the full rear surface area.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main current path output	Electrically and thermally connected to PCB copper pour; must be soldered to ≥1-in² 2-oz Cu for rated current.
Gate	Control input	High-impedance MOS gate requiring <100 nA bias; sensitive to ESD; routed away from noisy traces.
Source	Reference return path	Completes power loop; ties to ground plane or low-side shunt; defines V_GS reference point.

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced with 3.3 V MCU outputs-eliminates gate driver ICs in low-voltage control stages.
Low R_DS(on) at 4.5 V	40 mΩ max at V_GS = 4.5 V-ensures <0.7 W loss at 41 A, critical for battery runtime extension.
Fast body diode	t_rr = 80 ns, Q_rr = 120 nC-reduces switching losses in synchronous rectification and H-bridge freewheeling.
100% avalanche rated	Tested per JEDEC JESD24-11-guarantees reliable operation during inductive load turn-off transients.
Lead-free and RoHS compliant	Meets IPC/JEDEC J-STD-020D reflow profile-supports automated assembly without Pb-free process modifications.

Applications

DC Motor Control

Battery Management Systems

Use Scenario: Bidirectional 24 V brushed DC motor drive in portable power tools with PWM switching at 20 kHz.

IC Role / Device Role / Timing Role: Low-side switching element in half-bridge configuration; handles peak currents up to 41 A during stall conditions.

Use Value: 20 mΩ R_DS(on) limits resistive heating to <0.35 W at 30 A, enabling compact heatsinkless design.

Use Scenario: Solid-state main disconnect switch in 48 V Li-ion battery packs with overcurrent protection response <100 µs.

IC Role / Device Role / Timing Role: High-current isolation FET controlled by battery monitor IC; conducts full pack current during normal operation.

Use Value: 190 mJ avalanche rating absorbs inductive kickback from contactor coil de-energization without failure.

LED Lighting Drivers

Industrial PLC Output Modules

Use Scenario: Constant-current dimming stage for high-bay LED fixtures using buck topology with 350 kHz switching.

IC Role / Device Role / Timing Role: Primary power switch synchronizing with controller's gate drive signal; duty cycle modulated for brightness control.

Use Value: 58 nC total gate charge enables clean 100 ns rise/fall times with 0.6 A peak gate driver current.

Use Scenario: 24 V DC digital output channel in programmable logic controller rack handling solenoid loads up to 2 A.

IC Role / Device Role / Timing Role: Load-switching MOSFET with integrated flyback diode clamping; driven directly from FPGA I/O bank.

Use Value: 2.5 V V_GS(th) ensures reliable turn-on with 3.3 V LVTTL logic, eliminating external level shifters.

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
IRFZ44N	Same die but TO-220 package; R_DS(on) = 28 mΩ @ 10 V; higher R_θJC = 1.5°C/W.	Requires larger heatsink for same current; unsuitable for space-constrained SMT layouts.	Choose IRFZ44N only if through-hole mounting and lower cost outweigh thermal and layout penalties.
STP55NF06L	60 V rating; R_DS(on) = 18 mΩ @ 10 V; V_GS(th) = 1.0–2.5 V; higher Q_g = 72 nC.	Better voltage margin for 48 V systems; slower switching due to higher gate charge.	Select STP55NF06L when 60 V rating or tighter V_GS(th) tolerance is required, accepting increased driver demand.

Compared with IRFZ44N and STP55NF06L, IRLZ44NL uniquely balances low gate threshold, TO-262 thermal efficiency, and 55 V rating-making it optimal for compact, microcontroller-driven 24–48 V industrial switches where board space and drive simplicity are critical.

Availability

IRLZ44NL is available at Aetrix Electronics and suitable for DC motor control, battery management systems, LED lighting drivers, and industrial PLC output modules requiring stable component supply across production lifecycles.

Supply support for IRLZ44NL 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, with global manufacturing and quality certification to ISO/TS 16949.

The StrongIRFET™ product line delivers rugged, high-current MOSFETs optimized for industrial motor drives, UPS systems, and solar inverters-emphasizing avalanche robustness, low R_DS(on), and logic-level compatibility.

FAQ

What is the maximum pulsed drain current for IRLZ44NL?

The absolute maximum pulsed drain current (I_DM) is 160 A, defined for pulse widths ≤100 µs and duty cycle ≤1%. This rating assumes T_J ≤ 175°C and proper PCB thermal design. Exceeding this limit risks irreversible silicon damage even if average power remains within SOA boundaries.

Can IRLZ44NL replace IRLZ34N in an existing design?

Yes-IRLZ44NL is a direct upgrade: both share TO-262 package, pinout, and logic-level drive, but IRLZ44NL offers 20 mΩ R_DS(on) versus 35 mΩ for IRLZ34N at 10 V, reducing conduction loss by 43% at 40 A. No layout or firmware changes are needed.

Does IRLZ44NL require a gate resistor in standard switching applications?

A gate resistor (typically 10–47 Ω) is recommended to dampen ringing caused by PCB trace inductance and MOSFET input capacitance. Omitting it may cause overshoot exceeding 20 V on the gate, risking oxide breakdown-especially with fast drivers or long gate traces.

What is the safe operating area (SOA) limitation at T_C = 100°C?

At T_C = 100°C, the continuous drain current is derated to 28 A, and the SOA restricts operation to V_DS ≤ 30 V at 28 A for DC conditions. For pulse operation, the 10 ms curve allows up to 45 A at 25 V, provided peak junction temperature stays below 175°C.

IRLZ44NL 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):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 47A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4V, 10V

Rds On (Max) @ Id, Vgs:: 22mOhm @ 25A, 10V

Vgs(th) (Max) @ Id:: 2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 48 nC @ 5 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 1700 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 3.8W (Ta), 110W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-262

IRLZ44NL FAQ

1.How can I place an order for IRLZ44NL through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLZ44NL 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 IRLZ44NL reliable?

The price and inventory of IRLZ44NL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLZ44NL is usually 5 days.

3.What payment methods are accepted for IRLZ44NL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLZ44NL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLZ44NL?

IRLZ44NL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLZ44NL 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 IRLZ44NL?

For technical support, including IRLZ44NL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLZ44NL requirements.

6.How does Aetrix verify that IRLZ44NL is sourced from the original manufacturer or authorized distributors?

All IRLZ44NL 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 IRLZ44NL meets industry standards.

7.What is the process for return or replacement of IRLZ44NL?

All IRLZ44NL units undergo pre-shipment inspection (PSI). If there is an issue with IRLZ44NL, 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 IRLZ44NL part is unused and in its original packaging.

Return procedure for IRLZ44NL:

1.Submit a request within 90 days.

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

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