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

Vishay Siliconix IRFR320TRL

Name: IRFR320TRL
Brand: Vishay Siliconix
SKU: IRFR320TRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRFR320TRL

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

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

Datasheet:: IRFR320TRL.pdf

Description:: MOSFET N-CH 400V 3.1A DPAK

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Product details

Overview

IRFR320TRL from Vishay Siliconix is a 400 V, 3.1 A N-channel surface-mount power MOSFET in DPAK (TO-252) package, featuring 1.8 Ω R_DS(on) at V_GS = 10 V, 20 nC total gate charge, and repetitive avalanche rating-designed for high-voltage DC-DC converters, offline SMPS primary-side switching, and industrial motor control drivers.

For engineers reviewing the IRFR320TRL datasheet, IRFR320TRL pinout, IRFR320TRL application, or IRFR320TRL equivalent, this page delivers verified electrical specs, thermal derating behavior, body diode recovery characteristics (t_rr = 270–600 ns), PCB-mount power dissipation (2.5 W), and validated alternatives for high-reliability 400 V switching designs.

Technical Context

This device belongs to Vishay's third-generation high-voltage TrenchFET® family, optimized for rugged unclamped inductive switching with 160 mJ single-pulse avalanche energy and 4.0 V/ns peak diode recovery dV/dt rating. Its dynamic parameters-including 11 nC Q_gd, 3.3 nC Q_gs, and 10 ns turn-on delay-support fast, low-loss hard-switching topologies.

The IRFR320TRL integrates a co-packaged body diode with 1.6 V forward drop at 3.1 A and 270–600 ns reverse recovery time, enabling operation in flyback and resonant converter configurations without external diode supplementation under moderate current conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	400 V - supports primary-side switching in universal-input offline SMPS up to 375 V DC bus
R_DS(on) @ V_GS = 10 V	1.8 Ω - enables <3.5 W conduction loss at 3.1 A continuous drain current
Q_g	20 nC - determines gate drive power requirement and switching speed in 100–500 kHz converters
I_D (T_C = 25 °C)	3.1 A - maximum continuous current with heatsink; derates linearly to 2.0 A at 100 °C case temperature
E_AS	160 mJ - ensures robustness against transient overvoltage during inductive load switching
t_rr	270–600 ns - defines minimum dead-time requirements in synchronous or quasi-resonant topologies
R_thJA (PCB mount)	50 °C/W - sets thermal rise of 125 °C above ambient at 2.5 W dissipation on 1" FR-4 board

Pinout & Package

DPAK (TO-252) surface-mount package with exposed drain pad for thermal conduction; standard 3-pin configuration optimized for automated assembly and high-power density layouts.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control input	Receives 10 V logic-level drive; 3.3 nC Q_gs enables fast turn-on with low driver loss
D (Drain)	High-side switch node	Connected to exposed copper pad; carries full 400 V blocking and 3.1 A load current
S (Source)	Reference return path	Provides common reference for gate drive and current sensing; internal source inductance = 7.5 nH

Key Features

Feature	Design Value
Repetitive avalanche rated	Withstands 3.1 A repetitive avalanche current and 4.2 mJ energy without degradation-critical for flyback snubberless designs
Dynamic dV/dt immunity	Rated for 4.0 V/ns-prevents false turn-on during high dv/dt transients in high-side switching
Fast switching performance	10 ns t_d(on), 14 ns t_r, 30 ns t_d(off), 13 ns t_f enable efficient operation in >200 kHz SMPS
Low Q_gd/Q_g ratio	11/20 = 55% - improves Miller immunity and reduces risk of shoot-through in half-bridge configurations
Lead (Pb)-free and halogen-free	Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile for vapor-phase soldering

Applications

Offline AC-DC Adapters	Industrial Motor Drives
Use Scenario: 36 W universal-input (85–265 V_AC) flyback adapter powering IoT gateways. IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer into transformer; operates at 65 kHz with discontinuous conduction mode. Use Value: 160 mJ E_AS eliminates need for external clamping; 1.8 Ω R_DS(on) keeps conduction loss below 175 mW at full load.	Use Scenario: 24 V DC-powered brushless DC motor controller for HVAC blowers. IC Role / Device Role / Timing Role: Low-side switching element in three-phase inverter leg; commutated at 10–20 kHz with PWM gating. Use Value: 4.0 V/ns dV/dt rating prevents spurious turn-on from phase-leg crosstalk; 3.1 A I_D supports 1.5 A RMS motor current with margin.
LED Driver Power Stages	Telecom DC-DC Modules
Use Scenario: Constant-current buck-boost LED driver for street lighting (36–72 V output, 1.2 A). IC Role / Device Role / Timing Role: Synchronous rectifier switch in secondary-side regulation loop; driven by isolated gate signal. Use Value: Body diode V_SD = 1.6 V at 3.1 A enables low-loss freewheeling; 270 ns t_rr minimizes reverse recovery loss during forced commutation.	Use Scenario: 48 V input to 12 V/10 A isolated DC-DC module in telecom shelf power systems. IC Role / Device Role / Timing Role: Primary-side switch in forward converter topology operating at 250 kHz with active clamp reset. Use Value: 20 nC Q_g allows use of low-cost 1 A gate driver IC; 50 °C/W R_thJA (PCB mount) sustains 2.5 W loss without heatsink.

Offline AC-DC Adapters

Industrial Motor Drives

Use Scenario: 36 W universal-input (85–265 V_AC) flyback adapter powering IoT gateways.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer into transformer; operates at 65 kHz with discontinuous conduction mode.

Use Value: 160 mJ E_AS eliminates need for external clamping; 1.8 Ω R_DS(on) keeps conduction loss below 175 mW at full load.

Use Scenario: 24 V DC-powered brushless DC motor controller for HVAC blowers.

IC Role / Device Role / Timing Role: Low-side switching element in three-phase inverter leg; commutated at 10–20 kHz with PWM gating.

Use Value: 4.0 V/ns dV/dt rating prevents spurious turn-on from phase-leg crosstalk; 3.1 A I_D supports 1.5 A RMS motor current with margin.

LED Driver Power Stages

Telecom DC-DC Modules

Use Scenario: Constant-current buck-boost LED driver for street lighting (36–72 V output, 1.2 A).

IC Role / Device Role / Timing Role: Synchronous rectifier switch in secondary-side regulation loop; driven by isolated gate signal.

Use Value: Body diode V_SD = 1.6 V at 3.1 A enables low-loss freewheeling; 270 ns t_rr minimizes reverse recovery loss during forced commutation.

Use Scenario: 48 V input to 12 V/10 A isolated DC-DC module in telecom shelf power systems.

IC Role / Device Role / Timing Role: Primary-side switch in forward converter topology operating at 250 kHz with active clamp reset.

Use Value: 20 nC Q_g allows use of low-cost 1 A gate driver IC; 50 °C/W R_thJA (PCB mount) sustains 2.5 W loss without heatsink.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage N-channel MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SiHFR320-GE3	Same die, identical R_DS(on), Q_g, and avalanche ratings; differs only in tape-and-reel packaging and halogen-free marking	No functional difference; fully interchangeable in layout and thermal design	Select SiHFR320-GE3 when RoHS-compliant halogen-free certification is required per IPC-1752A
IRFR3710TRPbF	Higher V_DS (100 V), lower R_DS(on) (0.056 Ω), higher Q_g (120 nC); not avalanche-rated	Unsuitable for 400 V applications; requires redesign for voltage derating and gate drive strength	Choose IRFR3710TRPbF only for ≤100 V high-current DC-DC stages where avalanche robustness is not needed

Compared with IRFR320TRL, SiHFR320-GE3 offers identical electrical and thermal performance with enhanced environmental compliance, while IRFR3710TRPbF trades voltage capability for lower on-resistance and higher gate charge-making it incompatible for direct replacement in 400 V circuits.

Availability

IRFR320TRL is available at Aetrix Electronics and suitable for offline AC-DC adapters, industrial motor drives, and telecom DC-DC modules requiring stable component supply across extended production lifecycles.

Supply support for IRFR320TRL 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

Vishay Siliconix is a global leader in discrete semiconductors, specializing in high-reliability power MOSFETs, diodes, and optoelectronics for industrial, automotive, and computing applications.

The IRFR320TRL belongs to Vishay's third-generation TrenchFET® high-voltage power MOSFET product line, engineered specifically for ruggedized switching in space-constrained, high-efficiency offline power supplies and motor control inverters.

FAQ

What is the maximum continuous drain current for IRFR320TRL at 100 °C case temperature?

The IRFR320TRL supports 2.0 A continuous drain current at T_C = 100 °C, based on its linear derating factor of 0.33 W/°C from the 42 W maximum power dissipation at 25 °C. This value is confirmed in the Absolute Maximum Ratings table of Vishay document 91273 and applies under proper PCB thermal management per Figure 9.

Does IRFR320TRL have an integrated body diode, and what are its key parameters?

Yes, the IRFR320TRL includes an integral body diode with V_SD = 1.6 V at I_S = 3.1 A and T_J = 25 °C, reverse recovery time t_rr = 270–600 ns, and reverse recovery charge Q_rr = 1.4–3.0 μC. These values are measured per the test conditions in the "Drain-Source Body Diode Characteristics" section of the IRFR320TRL datasheet (document 91273).

What is the thermal resistance from junction to ambient for IRFR320TRL when mounted on a standard PCB?

When mounted on a 1" square FR-4 PCB, the IRFR320TRL has R_thJA = 50 °C/W, enabling 2.5 W power dissipation before reaching the 150 °C maximum junction temperature. This value is specified in the Thermal Resistance Ratings table (note "a") of Vishay document 91273 and assumes no additional heatsink.

Is IRFR320TRL suitable for avalanche operation, and what are its rated limits?

Yes, the IRFR320TRL is explicitly repetitive avalanche rated: I_AR = 3.1 A and E_AR = 4.2 mJ under pulsed conditions, with single-pulse avalanche energy E_AS = 160 mJ. These ratings are validated per the unclamped inductive test circuit in Figure 12 and require adherence to pulse width and duty cycle limits defined in the datasheet notes.

What gate voltage is required to fully enhance IRFR320TRL, and what is its threshold range?

The IRFR320TRL has a gate-source threshold voltage V_GS(th) ranging from 2.0 V to 4.0 V at I_D = 250 μA, but full enhancement (R_DS(on) ≤ 1.8 Ω) requires V_GS = 10 V per the PRODUCT SUMMARY and SPECIFICATIONS tables. Operation at 5 V is not guaranteed and falls outside the specified on-resistance performance window.

IRFR320TRL Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 400 V

Current - Continuous Drain (Id) @ 25°C:: 3.1A (Tc)

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

Rds On (Max) @ Id, Vgs:: 1.8Ohm @ 1.9A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 20 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 350 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 2.5W (Ta), 42W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

IRFR320TRL FAQ

1.How can I place an order for IRFR320TRL through Aetrix?

Please submit a Request for Quotation (RFQ) for IRFR320TRL 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 IRFR320TRL reliable?

The price and inventory of IRFR320TRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFR320TRL is usually 5 days.

3.What payment methods are accepted for IRFR320TRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFR320TRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRFR320TRL?

IRFR320TRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRFR320TRL 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 IRFR320TRL?

For technical support, including IRFR320TRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFR320TRL requirements.

6.How does Aetrix verify that IRFR320TRL is sourced from the original manufacturer or authorized distributors?

All IRFR320TRL 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 IRFR320TRL meets industry standards.

7.What is the process for return or replacement of IRFR320TRL?

All IRFR320TRL units undergo pre-shipment inspection (PSI). If there is an issue with IRFR320TRL, 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 IRFR320TRL part is unused and in its original packaging.

Return procedure for IRFR320TRL:

1.Submit a request within 90 days.

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

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