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

Infineon Technologies IRFR48ZTRLPBF

Name: IRFR48ZTRLPBF
Brand: Infineon Technologies
SKU: IRFR48ZTRLPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRFR48ZTRLPBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: IRFR48ZTRLPBF.pdf

Description:: MOSFET N-CH 55V 42A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRFR48ZTRLPBF from Infineon Technologies is a 55V, 42A N-channel D-Pak power MOSFET with 11 mΩ R_DS(on) at V_GS = 10 V, 175°C maximum junction temperature, and rated repetitive avalanche energy up to 74 mJ. It serves as a high-efficiency switching element in DC-DC converters, motor drives, and power supplies where low conduction loss and robust thermal performance are critical.

For engineers reviewing the IRFR48ZTRLPBF datasheet, IRFR48ZTRLPBF pinout, IRFR48ZTRLPBF application, or IRFR48ZTRLPBF equivalent, key selection criteria include its 1.64°C/W junction-to-case thermal resistance, 40 nC total gate charge, 15 ns turn-on delay, body diode reverse recovery time of 20–40 ns, and compatibility with standard PCB-mount thermal management.

Technical Context

This HEXFET® device uses advanced silicon processing to minimize on-resistance per die area while maintaining ruggedness. Its design integrates a fast-switching capability (tr = 61 ns, tf = 35 ns) and supports unclamped inductive switching with validated repetitive avalanche operation up to T_jmax.

The MOSFET features an integral body diode with V_SD = 1.3 V at 37 A and Q_rr = 14–28 nC, enabling efficient synchronous rectification and flyback recovery. Gate threshold voltage is tightly specified (2.0–4.0 V), supporting reliable TTL/CMOS-level drive without external level shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	55 V - Maximum drain-source blocking voltage before avalanche onset; defines safe operating range in 48 V bus systems.
R_DS(on)	11 mΩ max @ V_GS = 10 V, T_j = 25°C - Enables <1.9 W conduction loss at 42 A, reducing heatsink requirements.
I_D (cont)	42 A @ T_C = 25°C - Continuous current rating under ideal case cooling; derates to 25 A at T_C = 100°C.
Q_g	40–60 nC - Total gate charge determines driver strength needed; compatible with common 1-A peak gate drivers.
T_j max	175°C - Enables operation in high-ambient industrial environments without thermal shutdown.
E_AS	74 mJ (tested) - Single-pulse avalanche energy rating confirms robustness against inductive switching transients.
R_θJC	1.64°C/W - Low junction-to-case thermal resistance allows direct heatsinking via PCB copper or clip-mount solutions.

Pinout & Package

IRFR48ZTRLPBF is housed in a surface-mount D-Pak (TO-252AA) package with three terminals: Drain (tab), Source (pins 1 & 2), and Gate (pin 3). The exposed drain pad provides primary thermal path to PCB copper.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main current-carrying terminal, electrically connected to backside metal	Primary thermal interface; must be soldered to ≥100 mm² copper pour for rated power dissipation.
Source (Pins 1 & 2)	Reference node for gate drive and current return path	Low-inductance dual-pin layout minimizes source inductance (L_S = 7.5 nH) to suppress ringing during hard switching.
Gate (Pin 3)	Control electrode for channel modulation	High-impedance input requiring <200 nA leakage current; sensitive to ESD but tolerant of ±20 V transient voltage.

Key Features

Feature	Design Value
Ultra-low R_DS(on)	11 mΩ enables >96% efficiency in 12–48 V buck converters at 20–40 A load currents.
Repetitive avalanche rating	Validated operation up to T_jmax ensures reliability in unclamped inductive switching without snubbers.
Fast body diode	20–40 ns t_rr and 14–28 nC Q_rr reduce switching losses in synchronous rectifier and half-bridge topologies.
175°C junction rating	Supports extended lifetime in sealed enclosures or high-ambient automotive under-hood applications.
Lead-free and RoHS-compliant	Meets IPC/JEDEC J-STD-020D reflow profile; qualified for 260°C peak temperature, 10-second duration.

Applications

DC-DC Buck Converter

Brushless DC Motor Drive

Use Scenario: High-current step-down regulator for FPGA core voltage (0.8–1.2 V) in telecom base station power modules.

IC Role / Device Role / Timing Role: Synchronous high-side switch operating at 300–500 kHz with forced PWM mode.

Use Value: 11 mΩ R_DS(on) reduces conduction loss by 35% vs. comparable 20 mΩ MOSFETs, lowering thermal stress on 6-layer PCB.

Use Scenario: Upper-leg switch in 3-phase inverter driving 24 V BLDC fan in HVAC control unit.

IC Role / Device Role / Timing Role: Fast-switching power stage component with body diode conducting freewheeling current during PWM off-time.

Use Value: 20–40 ns reverse recovery time minimizes shoot-through risk and reduces gate driver stress during commutation.

Industrial Power Supply

LED Constant-Current Driver

Use Scenario: Primary-side switch in 150 W offline flyback converter for factory automation I/O module.

IC Role / Device Role / Timing Role: Main switching transistor handling 55 V clamp voltage and repetitive avalanche events during line surges.

Use Value: 74 mJ tested E_AS eliminates need for external clamping circuits, simplifying BOM and improving reliability.

Use Scenario: High-side switch controlling 36 V, 3 A LED string in smart streetlight driver.

IC Role / Device Role / Timing Role: Dimmable constant-current switch modulated via PWM at 1–10 kHz.

Use Value: 175°C T_j rating permits operation in thermally constrained aluminum housing without active cooling.

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
IRFR4620TRLPBF	55 V, 14 mΩ R_DS(on), 32 A I_D, lower Q_g (32 nC)	Lower current rating and higher on-resistance limit use in high-efficiency 40+ A designs	Select when gate drive capability is limited and 32 A continuous current suffices.
STP55NF06L-1	60 V, 11 mΩ R_DS(on), 50 A I_D, TO-220 package	Through-hole mounting and higher current rating suit legacy board designs with manual assembly	Choose for through-hole prototyping or where D-Pak thermal interface is impractical.

Compared with IRFR4620TRLPBF, IRFR48ZTRLPBF delivers 25% lower conduction loss at full load but requires ~25% more gate drive energy; versus STP55NF06L-1, it offers superior thermal performance in surface-mount layouts but lacks mechanical screw-mount stability.

Availability

IRFR48ZTRLPBF is available at Aetrix Electronics and suitable for DC-DC converters, BLDC motor drives, and industrial power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for IRFR48ZTRLPBF 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 and IECQ QC 080000.

This part belongs to Infineon's HEXFET® Power MOSFET product line, engineered for high-efficiency switching in medium-voltage power conversion systems where low R_DS(on), fast switching, and avalanche ruggedness are essential.

FAQ

What is the maximum allowable gate-to-source voltage for IRFR48ZTRLPBF?

The absolute maximum V_GS rating is ±20 V. Operation beyond this risks permanent gate oxide damage. For reliable long-term use, gate drive should be limited to +10 V to +15 V for turn-on and –5 V to 0 V for turn-off, matching the device's 2.0–4.0 V threshold range and minimizing Miller-induced false triggering.

Does IRFR48ZTRLPBF require a gate resistor, and what value is recommended?

Yes - a series gate resistor is required to dampen ringing and control dV/dt. Based on its 40–60 nC Q_g and typical 1-A peak gate driver output, a 10–12 Ω resistor is recommended for 300–500 kHz switching. Lower values (<5 Ω) increase switching speed but risk overshoot; higher values (>22 Ω) slow turn-on and raise switching losses.

Can IRFR48ZTRLPBF be used in parallel configurations?

Yes - its positive temperature coefficient of R_DS(on) (1.5× increase from 25°C to 175°C) enables inherent current sharing. Successful paralleling requires matched layout (symmetrical trace lengths, shared gate drive node), identical gate resistors, and thermal coupling via common heatsink or copper plane to ensure uniform junction temperature rise.

Is the body diode in IRFR48ZTRLPBF suitable for synchronous rectification?

Yes - the integrated body diode has a forward voltage of ≤1.3 V at 37 A and reverse recovery time of 20–40 ns, making it viable for low-frequency synchronous rectification (≤100 kHz). However, for high-frequency (>200 kHz) or zero-voltage switching topologies, an external Schottky diode may still be preferred to minimize Q_rr-related losses.

IRFR48ZTRLPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

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):: 10V

Rds On (Max) @ Id, Vgs:: 11mOhm @ 37A, 10V

Vgs(th) (Max) @ Id:: 4V @ 50µA

Gate Charge (Qg) (Max) @ Vgs:: 60 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1720 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 91W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252AA (DPAK)

IRFR48ZTRLPBF FAQ

1.How can I place an order for IRFR48ZTRLPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRFR48ZTRLPBF 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 IRFR48ZTRLPBF reliable?

The price and inventory of IRFR48ZTRLPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFR48ZTRLPBF is usually 5 days.

3.What payment methods are accepted for IRFR48ZTRLPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFR48ZTRLPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRFR48ZTRLPBF?

IRFR48ZTRLPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRFR48ZTRLPBF 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 IRFR48ZTRLPBF?

For technical support, including IRFR48ZTRLPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFR48ZTRLPBF requirements.

6.How does Aetrix verify that IRFR48ZTRLPBF is sourced from the original manufacturer or authorized distributors?

All IRFR48ZTRLPBF 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 IRFR48ZTRLPBF meets industry standards.

7.What is the process for return or replacement of IRFR48ZTRLPBF?

All IRFR48ZTRLPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRFR48ZTRLPBF, 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 IRFR48ZTRLPBF part is unused and in its original packaging.

Return procedure for IRFR48ZTRLPBF:

1.Submit a request within 90 days.

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

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