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

Vishay Siliconix IRF730ASTRLPBF

Name: IRF730ASTRLPBF
Brand: Vishay Siliconix
SKU: IRF730ASTRLPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRF730ASTRLPBF

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

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

Datasheet:: IRF730ASTRLPBF.pdf

Description:: MOSFET N-CH 400V 5.5A D2PAK

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Product details

Overview

IRF730ASTRLPBF from Vishay Siliconix is a 400 V, 5.5 A N-channel power MOSFET in D2PAK (TO-263) package, featuring 1.0 Ω R_DS(on) at V_GS = 10 V, 22 nC total gate charge, and 290 mJ single-pulse avalanche energy-designed for high-voltage switching in flyback and forward SMPS topologies.

For engineers reviewing the IRF730ASTRLPBF datasheet, IRF730ASTRLPBF pinout, IRF730ASTRLPBF application, or IRF730ASTRLPBF equivalent, this page delivers verified electrical parameters, thermal resistance (R_thJC = 1.7 °C/W), body diode recovery characteristics (t_rr = 370–550 ns), and real-world SMPS design context without generic assumptions.

Technical Context

This MOSFET employs planar vertical DMOS technology optimized for high-voltage unclamped inductive switching. Its gate structure supports robust dV/dt immunity (4.6 V/ns peak diode recovery) and low Q_gd/Q_g ratio (9.3/22 nC), enabling stable operation under fast transient conditions in transformer-reset topologies.

The device integrates a co-packaged body diode with characterized reverse recovery charge (Q_rr = 1.6–2.4 μC) and forward voltage (V_SD = 1.6 V at 5.5 A), making it suitable for applications where synchronous rectification is not used but diode conduction occurs during dead time.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	400 V - Withstands full-line input surges in 230 VAC SMPS designs without derating.
R_DS(on) max	1.0 Ω at V_GS = 10 V - Enables <5.5 W conduction loss at 5.5 A DC current in continuous conduction mode.
Q_g max	22 nC - Compatible with standard gate drivers (e.g., UC384x family) without requiring external buffer stages.
E_AS	290 mJ - Supports reliable unclamped inductive switching in flyback converters up to 5.5 A peak current.
R_thJC	1.7 °C/W - Allows 74 W power dissipation with ≤100 °C case temperature rise above ambient.
t_rr	370–550 ns - Limits switching losses during body diode commutation in non-synchronous topologies.
I_D cont.	5.5 A at T_C = 25 °C - Sustains full-load current in compact heatsinked 100–200 W offline supplies.

Pinout & Package

D2PAK (TO-263) surface-mount package with exposed drain pad for thermal and electrical connection. Three terminals: Gate (G), Drain (D), Source (S). Drain tab is electrically connected to the internal MOSFET drain and serves as primary thermal path.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate control input	Accepts 10 V logic-level drive; threshold voltage range 2.0–4.5 V ensures turn-on margin across temperature.
D	Drain (high-side switch node)	Connected to transformer primary or bus rail; handles full 400 V blocking and 5.5 A pulsed current.
S	Source (power ground reference)	Return path for load current; ties to PCB ground plane and gate driver return to minimize noise coupling.

Key Features

Feature	Design Value
Low Q_g (22 nC)	Reduces gate drive power and enables use of low-cost PWM controllers without external FET drivers.
Characterized C_{oss eff.} (45 pF)	Enables accurate snubber design and predictable turn-off loss calculation in hard-switched topologies.
Avalanche-rated (E_AS = 290 mJ)	Eliminates need for external clamping circuits in flyback transformer reset, lowering BOM count.
Body diode t_rr & Q_rr specified	Allows precise estimation of reverse recovery losses during dead-time conduction in half-bridge configurations.
RoHS-compliant, halogen-free	Meets IPC-1752A material declaration requirements for industrial and telecom end equipment.

Applications

Switch Mode Power Supply (SMPS)	Uninterruptible Power Supply (UPS)
Use Scenario: Primary-side switch in 100–200 W offline flyback converter with universal AC input (85–265 VAC). IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer via transformer primary winding during each PWM cycle. Use Value: 400 V V_DS rating accommodates reflected output voltage plus leakage spike; 290 mJ E_AS absorbs reset energy without snubber.	Use Scenario: DC-DC boost stage in line-interactive UPS converting battery voltage (24–48 VDC) to regulated 380 VDC bus. IC Role / Device Role / Timing Role: Main switching element in high-efficiency boost converter operating at 50–100 kHz. Use Value: Low R_DS(on) minimizes conduction loss at high average current; 5.5 A I_D supports >1 kVA output with thermal margin.
High-Speed Power Switching	Industrial Motor Drive Stage
Use Scenario: Solid-state relay replacement in programmable logic controller (PLC) output modules switching 24–48 VDC loads. IC Role / Device Role / Timing Role: Fast-turning discrete switch replacing electromechanical relays for >100 kHz PWM-controlled actuation. Use Value: 22 ns rise time and 16 ns fall time enable clean edge transitions; 4.6 V/ns dV/dt ruggedness prevents false triggering.	Use Scenario: Brake chopper switch in 3-phase inverter drives dissipating regenerative energy into braking resistor. IC Role / Device Role / Timing Role: High-energy clamp switch activated only during overvoltage events on DC bus. Use Value: 290 mJ E_AS and 7.4 mJ repetitive avalanche rating allow repeated safe energy absorption without degradation.

Switch Mode Power Supply (SMPS)

Uninterruptible Power Supply (UPS)

Use Scenario: Primary-side switch in 100–200 W offline flyback converter with universal AC input (85–265 VAC).

IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer via transformer primary winding during each PWM cycle.

Use Value: 400 V V_DS rating accommodates reflected output voltage plus leakage spike; 290 mJ E_AS absorbs reset energy without snubber.

Use Scenario: DC-DC boost stage in line-interactive UPS converting battery voltage (24–48 VDC) to regulated 380 VDC bus.

IC Role / Device Role / Timing Role: Main switching element in high-efficiency boost converter operating at 50–100 kHz.

Use Value: Low R_DS(on) minimizes conduction loss at high average current; 5.5 A I_D supports >1 kVA output with thermal margin.

High-Speed Power Switching

Industrial Motor Drive Stage

Use Scenario: Solid-state relay replacement in programmable logic controller (PLC) output modules switching 24–48 VDC loads.

IC Role / Device Role / Timing Role: Fast-turning discrete switch replacing electromechanical relays for >100 kHz PWM-controlled actuation.

Use Value: 22 ns rise time and 16 ns fall time enable clean edge transitions; 4.6 V/ns dV/dt ruggedness prevents false triggering.

Use Scenario: Brake chopper switch in 3-phase inverter drives dissipating regenerative energy into braking resistor.

IC Role / Device Role / Timing Role: High-energy clamp switch activated only during overvoltage events on DC bus.

Use Value: 290 mJ E_AS and 7.4 mJ repetitive avalanche rating allow repeated safe energy absorption without degradation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP4NK50ZFP	500 V V_DS, 3.5 A I_D, 2.2 Ω R_DS(on), TO-220FP package	Lower current rating and higher on-resistance; requires larger heatsink for same power level	Preferred where higher voltage margin is critical and lower current suffices
IXTP50N10P	100 V V_DS, 50 A I_D, 0.022 Ω R_DS(on), TO-220 package	Insufficient voltage rating for 400 V applications; unsuitable for direct replacement	Only viable in low-voltage DC-DC stages-not a functional substitute for IRF730ASTRLPBF

Compared with STP4NK50ZFP, IRF730ASTRLPBF delivers 57% higher continuous current and 55% lower R_DS(on) at same voltage class; versus IXTP50N10P, it provides essential 400 V blocking capability required in offline AC-DC conversion-making IRF730ASTRLPBF the only validated option for universal-input SMPS primary switches.

Availability

IRF730ASTRLPBF is available at Aetrix Electronics and suitable for switch mode power supplies, uninterruptible power systems, and high-speed industrial switching applications requiring stable component supply and long-term manufacturing continuity.

Supply support for IRF730ASTRLPBF 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 IRF730AS family targets high-voltage power conversion with emphasis on avalanche ruggedness, low gate charge, and fully characterized dynamic parameters-enabling robust, simplified designs in cost-sensitive offline power supplies.

FAQ

What is the maximum continuous drain current for IRF730ASTRLPBF at 100 °C case temperature?

The IRF730ASTRLPBF supports 3.5 A continuous drain current at T_C = 100 °C, per its absolute maximum ratings table. This derating reflects thermal limits of the D2PAK package and ensures junction temperature remains within the -55 to +150 °C operating range. At 25 °C case temperature, the rating increases to 5.5 A. Designers must verify PCB copper area and heatsinking to maintain safe thermal margins under full-load conditions for the IRF730ASTRLPBF.

Does IRF730ASTRLPBF have a fully characterized body diode, and what are its key recovery parameters?

Yes, the IRF730ASTRLPBF includes a fully characterized intrinsic body diode with published reverse recovery time (t_rr = 370–550 ns), reverse recovery charge (Q_rr = 1.6–2.4 μC), and forward voltage (V_SD = 1.6 V at 5.5 A). These values are measured at T_J = 25 °C with I_F = 3.5 A and dI/dt = 100 A/μs. This characterization allows accurate loss modeling in topologies where the body diode conducts during dead time, such as in non-synchronous forward converters using the IRF730ASTRLPBF.

Is IRF730ASTRLPBF RoHS-compliant and halogen-free?

Yes, IRF730ASTRLPBF is lead (Pb)-free and halogen-free, meeting RoHS Directive 2011/65/EU and IEC 61249-2-21 standards. The "PbF" suffix explicitly denotes lead-free termination, and Vishay confirms compliance in document 91046. Material categorization data is available at www.vishay.com/doc?99912. This makes the IRF730ASTRLPBF suitable for export-controlled and environmentally regulated industrial equipment where substance restrictions apply.

What is the thermal resistance from junction to case (R_thJC) for IRF730ASTRLPBF, and how does it impact heatsink selection?

The IRF730ASTRLPBF has a maximum junction-to-case thermal resistance (R_thJC) of 1.7 °C/W, measured across the D2PAK drain tab. This low value enables efficient heat transfer to an external heatsink or copper pour. For example, at 74 W maximum power dissipation, a 1.7 °C/W R_thJC implies a 126 °C temperature rise from junction to case-requiring careful heatsink design to keep T_J ≤ 150 °C. PCB layout must include ≥1 in² of 2-oz copper connected to the drain tab to realize this spec for the IRF730ASTRLPBF.

Can IRF730ASTRLPBF be used in place of IRF730APbF or SiHF730ASTRL-GE3?

IRF730ASTRLPBF shares identical electrical specifications and D2PAK packaging with IRF730APbF (same die, different tape-and-reel marking) and is functionally equivalent to SiHF730ASTRL-GE3 (Vishay's alternate branded version). All three meet the same 400 V/5.5 A/1.0 Ω specs and share identical avalanche, capacitance, and switching parameters. However, IRF730ASTRLPBF is specifically qualified for lead-free assembly and halogen-free compliance, distinguishing it from legacy Pb-containing variants-confirming its suitability as a drop-in replacement in new designs requiring RoHS adherence for the IRF730ASTRLPBF.

IRF730ASTRLPBF Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 400 V

Current - Continuous Drain (Id) @ 25°C:: 5.5A (Tc)

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

Rds On (Max) @ Id, Vgs:: 1Ohm @ 3.3A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 22 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 600 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 74W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263 (D2PAK)

IRF730ASTRLPBF FAQ

1.How can I place an order for IRF730ASTRLPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRF730ASTRLPBF 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 IRF730ASTRLPBF reliable?

The price and inventory of IRF730ASTRLPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRF730ASTRLPBF is usually 5 days.

3.What payment methods are accepted for IRF730ASTRLPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRF730ASTRLPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRF730ASTRLPBF?

IRF730ASTRLPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRF730ASTRLPBF 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 IRF730ASTRLPBF?

For technical support, including IRF730ASTRLPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRF730ASTRLPBF requirements.

6.How does Aetrix verify that IRF730ASTRLPBF is sourced from the original manufacturer or authorized distributors?

All IRF730ASTRLPBF 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 IRF730ASTRLPBF meets industry standards.

7.What is the process for return or replacement of IRF730ASTRLPBF?

All IRF730ASTRLPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRF730ASTRLPBF, 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 IRF730ASTRLPBF part is unused and in its original packaging.

Return procedure for IRF730ASTRLPBF:

1.Submit a request within 90 days.

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

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