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

Vishay Siliconix IRF720SPBF

Name: IRF720SPBF
Brand: Vishay Siliconix
SKU: IRF720SPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRF720SPBF

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: IRF720SPBF.pdf

Description:: MOSFET N-CH 400V 3.3A D2PAK

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Product details

Overview

IRF720SPBF from Vishay Siliconix is a 400 V, 3.3 A N-channel surface-mount power MOSFET in D2PAK (TO-263) 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 and offline switch-mode power supplies.

For engineers reviewing the IRF720SPBF datasheet, IRF720SPBF pinout, IRF720SPBF application, or IRF720SPBF equivalent, key selection criteria include its 400 V drain-source breakdown voltage, 50 W case-power dissipation, 2.5 °C/W junction-to-case thermal resistance, fast 10 ns turn-on delay, and body diode with 270 ns reverse recovery time.

Technical Context

This third-generation power MOSFET uses planar VDMOS technology optimized for ruggedness and switching efficiency. It supports unclamped inductive switching with 190 mJ single-pulse avalanche energy and operates up to 150 °C junction temperature.

The device integrates a fast-recovery body diode (t_rr = 270 ns, Q_rr = 1.4 μC) and exhibits low gate input resistance (1.2–7.3 Ω), enabling simple drive requirements and ease of paralleling in high-current designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	400 V - supports primary-side switching in 380 V DC bus and universal AC-input SMPS
R_DS(on)	1.8 Ω @ V_GS = 10 V - enables low conduction loss at 2–3 A continuous drain current
Q_g	20 nC - determines gate driver power requirement and switching speed trade-off
I_D (continuous)	3.3 A @ T_C = 25 °C - defines maximum steady-state current with adequate heatsinking
E_AS	190 mJ - specifies energy-handling capability during unclamped inductive turn-off events
R_thJC	2.5 °C/W - enables thermal design using case temperature as proxy for junction temperature
t_r/t_f	14 ns / 13 ns - contributes to low switching losses in hard-switched topologies

Pinout & Package

D2PAK (TO-263) surface-mount package with exposed drain pad for thermal and electrical connection; 3-pin configuration optimized for high-power density PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Tab/Drain)	Drain (D)	Exposed metal tab - electrically connected to drain, serves as primary thermal path to PCB copper
Pin 2 (Source)	Source (S)	Low-side reference node; connects to power ground plane and carries full load current
Pin 3 (Gate)	Gate (G)	Control terminal requiring <20 V swing; low 1.2–7.3 Ω gate input resistance simplifies driver selection

Key Features

Feature	Design Value
Repetitive avalanche rated	Enables reliable operation under transient overloads without external snubbers in flyback and forward converters
Dynamic dv/dt rating	4.0 V/ns - suppresses false turn-on in high-noise, high-dV/dt environments like motor drives
Fast switching	10 ns t_d(on), 14 ns t_r - reduces switching losses in 50–200 kHz SMPS designs
Low R_thJC	2.5 °C/W - allows direct thermal coupling to heatsink or large copper pour without thermal interface material
Body diode t_rr	270 ns typical - minimizes commutation loss and ringing when used in synchronous rectification or freewheeling paths

Applications

AC-DC Power Adapters	Industrial DC-DC Converters
Use Scenario: 65–100 W offline flyback converter with universal AC input (85–265 V_AC) powering industrial sensors. IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer via transformer; operates at 65 kHz with zero-voltage switching assist. Use Value: 400 V V_DS margin accommodates reflected output voltage + leakage spike; 190 mJ E_AS handles worst-case no-load transients.	Use Scenario: Isolated 24 V to 5 V/3 A DC-DC module for PLC I/O modules with 150 °C ambient requirement. IC Role / Device Role / Timing Role: Active clamp forward converter primary switch; duty cycle modulated for regulation. Use Value: 2.5 °C/W R_thJC enables stable operation at T_C = 100 °C; 3.3 A I_D supports peak load with 1.5× derating.
LED Driver Power Stages	UPS Inverter Half-Bridge
Use Scenario: Constant-current 48 V LED string driver with PFC front-end and buck-boost secondary stage. IC Role / Device Role / Timing Role: High-side switch in non-isolated buck-boost topology; driven by isolated gate driver. Use Value: 1.8 Ω R_DS(on) limits conduction loss to <1.2 W at 3.3 A; 20 nC Q_g ensures efficient gate drive at 100 kHz.	Use Scenario: 1 kVA line-interactive UPS with 200 V DC bus and 50 Hz SPWM inverter output. IC Role / Device Role / Timing Role: Low-side switch in half-bridge leg driving LC filter; operated with 5 μs dead time. Use Value: Body diode t_rr = 270 ns prevents shoot-through during commutation; 4.0 V/ns dv/dt rating avoids spurious turn-on from bus noise.

AC-DC Power Adapters

Industrial DC-DC Converters

Use Scenario: 65–100 W offline flyback converter with universal AC input (85–265 V_AC) powering industrial sensors.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer via transformer; operates at 65 kHz with zero-voltage switching assist.

Use Value: 400 V V_DS margin accommodates reflected output voltage + leakage spike; 190 mJ E_AS handles worst-case no-load transients.

Use Scenario: Isolated 24 V to 5 V/3 A DC-DC module for PLC I/O modules with 150 °C ambient requirement.

IC Role / Device Role / Timing Role: Active clamp forward converter primary switch; duty cycle modulated for regulation.

Use Value: 2.5 °C/W R_thJC enables stable operation at T_C = 100 °C; 3.3 A I_D supports peak load with 1.5× derating.

LED Driver Power Stages

UPS Inverter Half-Bridge

Use Scenario: Constant-current 48 V LED string driver with PFC front-end and buck-boost secondary stage.

IC Role / Device Role / Timing Role: High-side switch in non-isolated buck-boost topology; driven by isolated gate driver.

Use Value: 1.8 Ω R_DS(on) limits conduction loss to <1.2 W at 3.3 A; 20 nC Q_g ensures efficient gate drive at 100 kHz.

Use Scenario: 1 kVA line-interactive UPS with 200 V DC bus and 50 Hz SPWM inverter output.

IC Role / Device Role / Timing Role: Low-side switch in half-bridge leg driving LC filter; operated with 5 μs dead time.

Use Value: Body diode t_rr = 270 ns prevents shoot-through during commutation; 4.0 V/ns dv/dt rating avoids spurious turn-on from bus noise.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP4NK40ZFP	400 V, 3.5 A, R_DS(on) = 1.7 Ω, Q_g = 18 nC, TO-220FP package	Through-hole mounting; higher R_thJA (65 °C/W) limits PCB-only cooling	Preferred where through-hole assembly or legacy footprint compatibility is required
IXTP4N40P	400 V, 4.0 A, R_DS(on) = 1.6 Ω, Q_g = 22 nC, TO-220 package	Larger package thermal mass; no surface-mount option; higher gate charge increases driver loss	Suitable for lower-frequency (<50 kHz) applications where conduction loss dominates

Compared with IRF720SPBF, STP4NK40ZFP offers slightly lower R_DS(on) but requires through-hole assembly and delivers less avalanche robustness (E_AS = 120 mJ); IXTP4N40P provides higher current rating but sacrifices switching speed and surface-mount compatibility - making IRF720SPBF optimal for space-constrained, medium-frequency SMPS designs needing ruggedness and thermal efficiency.

Availability

IRF720SPBF is available at Aetrix Electronics and suitable for AC-DC power adapters, industrial DC-DC converters, and LED driver power stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for IRF720SPBF 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 and passive components, specializing in high-reliability power MOSFETs, diodes, and optoelectronics for industrial, automotive, and computing markets.

The IRF720SPBF belongs to Vishay's third-generation high-voltage power MOSFET family, engineered for ruggedness, fast switching, and cost-effective performance in offline and isolated power conversion systems.

FAQ

What is the maximum junction temperature rating for the IRF720SPBF?

The IRF720SPBF has an operating junction and storage temperature range of –55 °C to +150 °C. Its absolute maximum junction temperature is 150 °C, and thermal design must ensure this limit is not exceeded under worst-case power dissipation and ambient conditions, using the specified R_thJC = 2.5 °C/W for case-to-junction heat transfer.

Does the IRF720SPBF have a built-in body diode, and what are its key parameters?

Yes, the IRF720SPBF integrates a parasitic body diode inherent to its N-channel MOSFET structure. Key parameters include a forward voltage V_SD of 1.6 V at I_S = 3.3 A and T_J = 25 °C, reverse recovery time t_rr of 270 ns (typical), and reverse recovery charge Q_rr of 1.4 μC - all critical for evaluating commutation losses in hard-switched topologies.

Is the IRF720SPBF RoHS-compliant, and what does the 'PbF' suffix indicate?

Yes, the IRF720SPBF is lead (Pb)-free and RoHS-compliant. The 'PbF' suffix explicitly denotes lead-free termination per EU RoHS Directive 2011/65/EU and China RoHS, with halogen-free packaging confirmed per Vishay specification document 99912.

What is the gate threshold voltage range for the IRF720SPBF, and how does it affect drive requirements?

The IRF720SPBF has a gate-source threshold voltage V_GS(th) ranging from 2.0 V to 4.0 V at I_D = 250 μA. This standard-level threshold requires a minimum 10 V gate drive for full enhancement (R_DS(on) = 1.8 Ω), confirming compatibility with conventional 12 V or 15 V gate drivers - not logic-level (5 V) drivers.

Can the IRF720SPBF be used in parallel configurations, and what design considerations apply?

Yes, the IRF720SPBF is designed for ease of paralleling, as stated in its features. Successful parallel operation requires matched gate drive impedance, symmetrical PCB layout to minimize loop inductance, and thermal coupling to ensure current sharing - aided by its positive R_DS(on) temperature coefficient and low gate input resistance (1.2–7.3 Ω).

IRF720SPBF Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 400 V

Current - Continuous Drain (Id) @ 25°C:: 3.3A (Tc)

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

Rds On (Max) @ Id, Vgs:: 1.8Ohm @ 2A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

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

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 410 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 3.1W (Ta), 50W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263 (D2PAK)

IRF720SPBF FAQ

1.How can I place an order for IRF720SPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRF720SPBF 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 IRF720SPBF reliable?

The price and inventory of IRF720SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRF720SPBF is usually 5 days.

3.What payment methods are accepted for IRF720SPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRF720SPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRF720SPBF?

IRF720SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRF720SPBF 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 IRF720SPBF?

For technical support, including IRF720SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRF720SPBF requirements.

6.How does Aetrix verify that IRF720SPBF is sourced from the original manufacturer or authorized distributors?

All IRF720SPBF 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 IRF720SPBF meets industry standards.

7.What is the process for return or replacement of IRF720SPBF?

All IRF720SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRF720SPBF, 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 IRF720SPBF part is unused and in its original packaging.

Return procedure for IRF720SPBF:

1.Submit a request within 90 days.

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

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