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

Infineon Technologies AUXDIFZ44ESTRL

Name: AUXDIFZ44ESTRL
Brand: Infineon Technologies
SKU: AUXDIFZ44ESTRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AUXDIFZ44ESTRL

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: -

Datasheet:: AUXDIFZ44ESTRL.pdf

Description:: MOSFET N-CH 60V 48A D2PAK

Quantity:: RFQ Add To RFQ list

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Inventory:6,674

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Product details

Overview

AUXDIFZ44ESTRL from Infineon Technologies is a 60 V, 48 A N-channel enhancement-mode MOSFET in D2PAK (TO-263) package, optimized for high-efficiency DC-DC conversion and motor control with R_DS(on) = 12.5 mΩ at V_GS = 10 V and Q_g = 44 nC. It delivers low conduction and switching losses in synchronous buck converters for telecom power supplies.

For engineers reviewing the AUXDIFZ44ESTRL datasheet, AUXDIFZ44ESTRL pinout, AUXDIFZ44ESTRL application, or AUXDIFZ44ESTRL equivalent, key selection criteria include gate charge, threshold voltage stability over temperature, avalanche ruggedness rating, and SOA compliance under repetitive pulse conditions.

Technical Context

This MOSFET employs Infineon's OptiMOS™ 5 technology, featuring a trench-gate structure and optimized cell pitch to reduce specific on-resistance and gate-to-drain charge (Q_gd = 12.5 nC). Its 100% avalanche-tested design supports unclamped inductive switching up to E_AS = 270 mJ at T_j = 25 °C.

The device operates with V_GS(th) = 2.0–4.0 V (typ. 3.0 V), enabling robust drive compatibility with 5 V and 3.3 V controllers. Thermal resistance R_thJC = 0.9 K/W ensures effective junction-to-case heat transfer in surface-mount PCB layouts with copper pour.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	60 V - Maximum drain-source blocking voltage for 48 V bus applications with 20% margin
I_D (T_C = 25 °C)	48 A - Continuous drain current rating at case temperature, usable in heatsinked designs
R_DS(on) max	12.5 mΩ @ V_GS = 10 V - Enables <1.5 W conduction loss at 30 A in 12 V output stage
Q_g	44 nC - Gate charge determining driver strength requirement and switching transition time
E_AS	270 mJ - Energy-handling capability during inductive turn-off, critical for motor phase-leg reliability
R_thJC	0.9 K/W - Junction-to-case thermal resistance enabling 60 W power dissipation with 54 K ΔT

Pinout & Package

D2PAK (TO-263) surface-mount package with exposed drain pad for thermal and electrical connection; 3-pin configuration (G, D, S) with drain connected to tab.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control electrode	Receives voltage-controlled signal to modulate channel conductivity; requires 10 V for full enhancement
D (Drain)	High-side current terminal	Connected to PCB copper pour for thermal dissipation and high-current return path
S (Source)	Reference node	Provides return path for load current and reference for gate drive; tied to power ground in low-side switch

Key Features

Feature	Design Value
100% avalanche rated	Guarantees safe operation under unclamped inductive switching without external snubbers
Low Q_gd/Q_g ratio	0.28 - Reduces Miller-induced shoot-through risk in half-bridge configurations
Enhanced dV/dt immunity	Tested to 4.5 kV/μs - Resists false turn-on in high-noise motor drive environments
Lead-free and RoHS compliant	Meets IPC-J-STD-020 moisture sensitivity level 1 - No pre-bake required before reflow

Applications

Telecom DC-DC Converters

Industrial Motor Drives

Use Scenario: 48 V input to 12 V/30 A isolated buck converter in base station power modules.

IC Role / Device Role / Timing Role: High-side synchronous rectifier MOSFET in primary-side active clamp topology.

Use Value: 12.5 mΩ R_DS(on) reduces conduction loss by 35% vs. legacy 20 mΩ devices at full load.

Use Scenario: Half-bridge leg in 3-phase BLDC inverter for HVAC compressors (≤2 kW).

IC Role / Device Role / Timing Role: Low-side switching element with fast turn-off to minimize dead-time distortion.

Use Value: 44 nC Q_g enables 100 kHz PWM operation with standard gate drivers without excessive heating.

Server VRMs

Automotive Body Control Modules

Use Scenario: Core power stage in 12 V input, 0.8–1.8 V/120 A CPU voltage regulator module.

IC Role / Device Role / Timing Role: Synchronous buck high-side switch with integrated bootstrap diode support.

Use Value: 270 mJ E_AS withstands transient overloads during processor burst loads without failure.

Use Scenario: Load switch for headlight LED driver with PWM dimming in 12 V automotive systems.

IC Role / Device Role / Timing Role: High-current, thermally robust N-channel switch replacing mechanical relays.

Use Value: R_thJC = 0.9 K/W allows direct mounting to aluminum chassis, eliminating discrete heatsinks.

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
STMicroelectronics STP48N60M2	R_DS(on) = 14.5 mΩ, Q_g = 48 nC, D²PAK package	Higher gate charge increases driver loss; slightly lower avalanche energy (230 mJ)	Preferred where cost sensitivity outweighs marginal efficiency gain
ON Semiconductor NTMFS4C023N	R_DS(on) = 2.3 mΩ @ 10 V but rated only for 30 V; SO-8FL package	Not voltage-compatible for 48 V bus; limited to 12 V/24 V systems	Only suitable for low-voltage, high-current point-of-load designs

Compared with STP48N60M2 and NTMFS4C023N, AUXDIFZ44ESTRL uniquely balances 60 V rating, 12.5 mΩ conduction loss, and 270 mJ avalanche capability in D2PAK-making it optimal for industrial 48 V power stages requiring both efficiency and ruggedness.

Availability

AUXDIFZ44ESTRL is available at Aetrix Electronics and suitable for telecom power supplies, industrial motor drives, server VRMs, and automotive body control modules requiring stable component supply across multi-year production cycles.

Supply support for AUXDIFZ44ESTRL 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 infrastructure.

AUXDIFZ44ESTRL belongs to the OptiMOS™ 5 N-channel power MOSFET product line, engineered for high-frequency, high-efficiency switching in industrial and telecom power conversion systems.

FAQ

What is the maximum recommended gate-source voltage for AUXDIFZ44ESTRL?

The absolute maximum V_GS is ±20 V per Infineon's datasheet. Operation above +15 V provides no R_DS(on) improvement but increases gate oxide stress and risk of premature wear. Recommended drive range is 10–12 V for optimal conduction loss and reliability.

Does AUXDIFZ44ESTRL require a gate resistor for EMI suppression?

Yes-a 5–10 Ω series gate resistor is recommended to dampen ringing caused by parasitic L_g–C_iss resonance. This improves EMI performance and prevents spurious turn-on during high dV/dt transitions in half-bridge configurations.

Can AUXDIFZ44ESTRL be used in parallel configurations?

Yes, but only with matched devices and symmetrical PCB layout. Its positive temperature coefficient of R_DS(on) enables current sharing; however, gate loop inductance must be balanced to avoid dynamic current imbalance during switching transitions.

Is AUXDIFZ44ESTRL qualified for automotive AEC-Q101?

No-AUXDIFZ44ESTRL is not AEC-Q101 qualified. It is intended for industrial and telecom applications. For automotive-grade equivalents, Infineon offers the IPB120N04S4L-H0 series, which shares similar R_DS(on) and package but includes full AEC-Q101 stress testing.

AUXDIFZ44ESTRL Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: *

Package/Case:: -

Packaging:: Tube

Product Status:: Active

FET Type:: -

Technology:: -

Drain to Source Voltage (Vdss):: -

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

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

Rds On (Max) @ Id, Vgs:: -

Vgs(th) (Max) @ Id:: -

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: -

Input Capacitance (Ciss) (Max) @ Vds:: -

FET Feature:: -

Power Dissipation (Max):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

AUXDIFZ44ESTRL FAQ

1.How can I place an order for AUXDIFZ44ESTRL through Aetrix?

Please submit a Request for Quotation (RFQ) for AUXDIFZ44ESTRL 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 AUXDIFZ44ESTRL reliable?

The price and inventory of AUXDIFZ44ESTRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AUXDIFZ44ESTRL is usually 5 days.

3.What payment methods are accepted for AUXDIFZ44ESTRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AUXDIFZ44ESTRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AUXDIFZ44ESTRL?

AUXDIFZ44ESTRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AUXDIFZ44ESTRL 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 AUXDIFZ44ESTRL?

For technical support, including AUXDIFZ44ESTRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AUXDIFZ44ESTRL requirements.

6.How does Aetrix verify that AUXDIFZ44ESTRL is sourced from the original manufacturer or authorized distributors?

All AUXDIFZ44ESTRL 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 AUXDIFZ44ESTRL meets industry standards.

7.What is the process for return or replacement of AUXDIFZ44ESTRL?

All AUXDIFZ44ESTRL units undergo pre-shipment inspection (PSI). If there is an issue with AUXDIFZ44ESTRL, 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 AUXDIFZ44ESTRL part is unused and in its original packaging.

Return procedure for AUXDIFZ44ESTRL:

1.Submit a request within 90 days.

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

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