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

Infineon Technologies IRFU3910PBF

Name: IRFU3910PBF
Brand: Infineon Technologies
SKU: IRFU3910PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRFU3910PBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: IRFU3910PBF.pdf

Description:: MOSFET N-CH 100V 16A IPAK

Quantity:: RFQ Add To RFQ list

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Inventory:1,887

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Product details

Overview

IRFU3910PBF from Infineon Technologies (formerly International Rectifier) is a 100V, 7.8A N-channel HEXFET® Power MOSFET in TO-251AA (IPAK) package, featuring 140mΩ R_DS(on) at V_GS = 10V, 35A peak pulsed drain current, and 100% avalanche-rated operation. It serves as a high-efficiency, low-side switching element in DC-DC converters and motor control circuits.

For engineers reviewing the IRFU3910PBF datasheet, IRFU3910PBF pinout, IRFU3910PBF application, or IRFU3910PBF equivalent, key selection criteria include its 100V V_DSS, 140mΩ on-resistance, TO-251AA thermal performance, unclamped inductive switching capability, and lead-free RoHS-compliant construction.

Technical Context

This MOSFET employs planar stripe cell technology with optimized gate oxide thickness to achieve stable threshold voltage (V_GS(th) = 2.0–4.0V) and low gate charge (Q_g = 24nC typ). Its rugged body diode supports bidirectional current flow in H-bridge configurations without external freewheeling diodes.

The device is characterized for operation from –55°C to +175°C junction temperature, with specified SOA curves covering linear-mode (ruggedness) and pulse-width-limited switching conditions. It meets JEDEC JESD47 reliability standards for power MOSFETs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	100V - maximum drain-source blocking voltage under continuous DC operation
R_DS(on) @ V_GS=10V	140mΩ - conduction loss determines I²R heating in 7.8A continuous switching applications
I_D (continuous)	7.8A @ T_C=25°C - usable current limit when mounted on infinite heatsink
Q_g	24nC - total gate charge directly impacts required driver current and switching speed
E_AS	110mJ - unclamped inductive switching energy rating defines safe operating area in relay/motor drive snubberless designs
T_J max	+175°C - maximum junction temperature enables high-ambient industrial and automotive under-hood use

Pinout & Package

Package: TO-251AA (IPAK), single-ended vertical-mount leadframe package with exposed drain pad for enhanced thermal transfer to PCB copper.

Pin/Terminal	Circuit Role	Design Meaning
Drain (D)	Main current-carrying terminal	Internally connected to exposed metal tab - must be soldered to large copper pour for thermal management
Gate (G)	Control input	High-impedance MOS gate requiring <1µA bias; sensitive to ESD - needs series resistor and TVS protection
Source (S)	Reference node for gate drive	Common return path for load current; establishes local ground reference for gate driver circuitry

Key Features

Feature	Design Value
100% UIS tested	Each unit validated for unclamped inductive switching up to 110mJ - eliminates need for external snubbers in solenoid drivers
Fast body diode	t_rr = 55ns - enables efficient synchronous rectification and reduces reverse recovery losses in buck converters
Lead-free and RoHS compliant	Pb-free plating per JEDEC JS709B - satisfies global environmental compliance without derating
Enhanced dv/dt capability	Rated for 4.5V/ns - suppresses false turn-on in high-noise motor drive environments

Applications

Brushed DC Motor Control

Industrial DC-DC Converters

Use Scenario: PWM-driven 24V/48V brushed DC motors in automated valves and conveyor systems.

IC Role / Device Role / Timing Role: Low-side switch controlling motor current direction and duty cycle.

Use Value: 140mΩ R_DS(on) minimizes conduction loss at 7.8A, reducing thermal stress and enabling compact heatsink design.

Use Scenario: Secondary-side synchronous rectifier in isolated 48V-to-12V telecom power supplies.

IC Role / Device Role / Timing Role: Active rectifying switch replacing Schottky diode in forward converter output stage.

Use Value: Fast 55ns body diode recovery and low Q_g enable high-frequency (300kHz) operation with <1.2W conduction loss.

LED Constant-Current Drivers

Power Factor Correction (PFC) Circuits

Use Scenario: High-brightness LED string dimming in architectural lighting with 36V bus.

IC Role / Device Role / Timing Role: Current-regulating switch in constant-current buck topology.

Use Value: 100V V_DSS accommodates LED string transients up to 85V, ensuring robust overvoltage tolerance.

Use Scenario: Boost switch in active PFC stages for 85–265VAC industrial power supplies.

IC Role / Device Role / Timing Role: Main switching transistor handling 100V+ drain swing and high peak currents.

Use Value: 110mJ E_AS rating allows reliable operation during line-voltage surges without external clamping.

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
STP36NF10	R_DS(on) = 36mΩ (lower), but V_DSS = 100V same; TO-220 package, higher thermal resistance	Better conduction efficiency but requires larger heatsink due to TO-220 thermal impedance	Prefer for lower-loss, space-tolerant designs where board area permits TO-220 mounting
IXTP12N10P	R_DS(on) = 120mΩ, Q_g = 18nC (lower), TO-220 package; no UIS rating published	Lower gate drive demand but lacks validated avalanche ruggedness for inductive loads	Choose only in non-inductive, low-dv/dt applications like LED switching where UIS is not required

Compared with STP36NF10 and IXTP12N10P, IRFU3910PBF offers superior thermal integration via TO-251AA's low θ_JA (62°C/W), verified UIS capability for motor drives, and balanced trade-off between R_DS(on), Q_g, and package size for space-constrained industrial PCBs.

Availability

IRFU3910PBF is available at Aetrix Electronics and suitable for brushed DC motor control, industrial DC-DC converters, and LED constant-current drivers requiring stable component supply across multi-year production cycles.

Supply support for IRFU3910PBF 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, sensor, and automotive ICs with broad industrial and energy infrastructure reach.

The HEXFET® Power MOSFET product line delivers high-voltage, high-current discrete switches engineered for ruggedness, efficiency, and thermal reliability in industrial motor drives, power supplies, and lighting systems.

FAQ

What is the maximum continuous drain current for IRFU3910PBF at 100°C case temperature?

At T_C = 100°C, the maximum continuous drain current is derated to 4.9A. This value is derived from the device's Safe Operating Area (SOA) curve and thermal resistance (R_θJC = 3.5°C/W), ensuring junction temperature remains ≤175°C under sustained conduction.

Does IRFU3910PBF require a gate resistor for standard 5V logic-level driving?

No - IRFU3910PBF has a gate threshold voltage (V_GS(th)) of 2.0–4.0V, making it compatible with direct 5V microcontroller GPIO drive. However, a 10–22Ω series gate resistor is recommended to dampen ringing and limit peak gate current during fast switching.

Can IRFU3910PBF replace IRFU120 in existing designs?

Yes - both share identical TO-251AA package, pinout, and voltage rating (100V), but IRFU3910PBF offers 140mΩ R_DS(on) versus IRFU120's 220mΩ. This reduces conduction loss by ~36%, allowing higher current or cooler operation without layout changes.

Is the body diode in IRFU3910PBF suitable for reverse recovery in synchronous rectification?

Yes - its body diode has t_rr = 55ns and Q_rr = 45nC, verified in datasheet Figure 12. These values support synchronous rectification up to 300kHz in buck converters, provided gate drive timing avoids shoot-through and accounts for diode forward voltage drop.

IRFU3910PBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

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

Packaging:: Tube

Product Status:: Last Time Buy

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 16A (Tc)

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

Rds On (Max) @ Id, Vgs:: 115mOhm @ 10A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 44 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 640 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 79W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: IPAK (TO-251AA)

IRFU3910PBF FAQ

1.How can I place an order for IRFU3910PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRFU3910PBF 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 IRFU3910PBF reliable?

The price and inventory of IRFU3910PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFU3910PBF is usually 5 days.

3.What payment methods are accepted for IRFU3910PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFU3910PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRFU3910PBF?

IRFU3910PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRFU3910PBF 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 IRFU3910PBF?

For technical support, including IRFU3910PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFU3910PBF requirements.

6.How does Aetrix verify that IRFU3910PBF is sourced from the original manufacturer or authorized distributors?

All IRFU3910PBF 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 IRFU3910PBF meets industry standards.

7.What is the process for return or replacement of IRFU3910PBF?

All IRFU3910PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRFU3910PBF, 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 IRFU3910PBF part is unused and in its original packaging.

Return procedure for IRFU3910PBF:

1.Submit a request within 90 days.

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

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