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

Vishay Siliconix IRFR420ATRLPBF

Name: IRFR420ATRLPBF
Brand: Vishay Siliconix
SKU: IRFR420ATRLPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRFR420ATRLPBF

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

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

Datasheet:: IRFR420ATRLPBF.pdf

Description:: MOSFET N-CH 500V 3.3A DPAK

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Product details

Overview

IRFR420ATRLPBF from Vishay Siliconix is a 500 V, 3.3 A N-channel enhancement-mode power MOSFET in DPAK (TO-252) package, featuring 3.0 Ω R_DS(on) at V_GS = 10 V, 17 nC total gate charge, and 140 mJ single-pulse avalanche energy - optimized for high-voltage switching in offline SMPS and UPS systems.

For engineers reviewing the IRFR420ATRLPBF datasheet, IRFR420ATRLPBF pinout, IRFR420ATRLPBF application, or IRFR420ATRLPBF equivalent, key selection criteria include its 500 V V_DS, rugged dV/dt capability (3.4 V/ns), body diode recovery time (330–500 ns), and thermal resistance (R_thJC = 1.5 °C/W) for reliable high-temperature operation.

Technical Context

This device employs planar vertical DMOS technology with fully characterized avalanche performance and effective output capacitance (C_{oss eff.} = 28 pF), enabling stable hard-switching behavior under inductive load conditions. Its gate threshold voltage (2.0–4.5 V) and low Q_gd/Q_gs ratio (8.5/4.3 nC) support clean turn-on/turn-off transitions with minimal Miller-induced oscillation.

The integrated body diode exhibits 1.6 V forward voltage at 2.5 A and 760–1140 μC reverse recovery charge, making it suitable for freewheeling paths where controlled commutation and moderate recovery stress are required - not intended for synchronous rectification or ultra-high-frequency ZVS topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	500 V - supports primary-side switching in universal-input AC/DC converters up to 400 V DC bus.
R_DS(on)	3.0 Ω @ V_GS = 10 V - enables low conduction loss at 2–3 A continuous drain current in thermally constrained layouts.
Q_g	17 nC max - reduces gate driver power demand and simplifies drive circuit design for 50–100 kHz SMPS.
E_AS	140 mJ - withstands unclamped inductive energy during fault events without failure in properly designed snubbers.
R_thJC	1.5 °C/W - allows 83 W power dissipation at T_C = 25 °C, supporting heatsink-limited thermal management.
dV/dt rating	3.4 V/ns - ensures immunity to parasitic turn-on in high-dV/dt environments like flyback or LLC primary switches.
I_D (T_C = 100 °C)	2.1 A - defines usable current derating for sustained operation in enclosed industrial enclosures.

Pinout & Package

DPAK (TO-252) surface-mount package with exposed drain pad on bottom side for thermal conduction; standard 3-pin configuration (G-D-S) with G and S on leadframe, D on thermal pad.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control electrode	Receives 10 V logic-level drive to fully enhance channel; requires <4.3 nC charge for turn-on.
D (Drain)	High-side power terminal	Connected to HV rail (up to 500 V); electrically and thermally tied to exposed copper pad for heatsinking.
S (Source)	Reference and return path	Serves as common reference for gate drive and current sensing; carries full load current and body diode reverse recovery charge.

Key Features

Feature	Design Value
Low Q_g (17 nC)	Reduces gate driver losses and enables use of low-power controllers without external buffer stages.
Characterized C_{oss eff.} (28 pF)	Enables accurate soft-start and dead-time calculation in resonant converters by modeling real capacitive discharge behavior.
Avalanche-rated (E_AS = 140 mJ)	Eliminates need for external clamping in cost-sensitive flyback designs operating near maximum duty cycle.
Peak dV/dt immunity (3.4 V/ns)	Prevents false triggering during fast transient events in high-noise industrial power supplies.
Body diode t_rr (330–500 ns)	Supports reliable freewheeling in 50–200 kHz hard-switched topologies without excessive switching loss penalty.

Applications

Offline AC/DC Adapters	Uninterruptible Power Supplies (UPS)
Use Scenario: Primary-side switch in 65–150 W flyback converters accepting 85–265 V AC input. IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer via transformer primary winding; operates at 65–100 kHz with 50% max duty cycle. Use Value: 500 V rating accommodates reflected output voltage plus leakage spike margin; 140 mJ E_AS handles worst-case no-load overvoltage without snubber redesign.	Use Scenario: Inverter-stage switch in line-interactive UPS delivering 500–1000 VA output with battery backup. IC Role / Device Role / Timing Role: Half-bridge leg switch in 50 Hz–10 kHz PWM inverter; conducts bidirectional current during battery-to-AC conversion. Use Value: 3.3 A continuous current and 2.1 A @ 100 °C enable compact heatsink design; body diode t_rr < 500 ns prevents shoot-through during complementary switching.
Industrial Motor Drives	LED Streetlight Drivers
Use Scenario: Low-side switch in 3-phase IGBT gate driver auxiliary supply or brake chopper circuit. IC Role / Device Role / Timing Role: Fast-switching clamp device dissipating regenerative energy during motor deceleration. Use Value: 10 A pulsed drain current and 140 mJ avalanche energy absorb short-duration braking surges without derating or external Zener clamps.	Use Scenario: Buck-boost PFC pre-regulator switch in outdoor LED drivers rated for -40 to +85 °C ambient. IC Role / Device Role / Timing Role: Critical conduction mode (CRM) switch handling 100–250 kHz switching with variable duty cycle. Use Value: 1.5 °C/W R_thJC and -55 to +150 °C T_J range ensure reliability in sealed, thermally isolated streetlight housings.

Offline AC/DC Adapters

Uninterruptible Power Supplies (UPS)

Use Scenario: Primary-side switch in 65–150 W flyback converters accepting 85–265 V AC input.

IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer via transformer primary winding; operates at 65–100 kHz with 50% max duty cycle.

Use Value: 500 V rating accommodates reflected output voltage plus leakage spike margin; 140 mJ E_AS handles worst-case no-load overvoltage without snubber redesign.

Use Scenario: Inverter-stage switch in line-interactive UPS delivering 500–1000 VA output with battery backup.

IC Role / Device Role / Timing Role: Half-bridge leg switch in 50 Hz–10 kHz PWM inverter; conducts bidirectional current during battery-to-AC conversion.

Use Value: 3.3 A continuous current and 2.1 A @ 100 °C enable compact heatsink design; body diode t_rr < 500 ns prevents shoot-through during complementary switching.

Industrial Motor Drives

LED Streetlight Drivers

Use Scenario: Low-side switch in 3-phase IGBT gate driver auxiliary supply or brake chopper circuit.

IC Role / Device Role / Timing Role: Fast-switching clamp device dissipating regenerative energy during motor deceleration.

Use Value: 10 A pulsed drain current and 140 mJ avalanche energy absorb short-duration braking surges without derating or external Zener clamps.

Use Scenario: Buck-boost PFC pre-regulator switch in outdoor LED drivers rated for -40 to +85 °C ambient.

IC Role / Device Role / Timing Role: Critical conduction mode (CRM) switch handling 100–250 kHz switching with variable duty cycle.

Use Value: 1.5 °C/W R_thJC and -55 to +150 °C T_J range ensure reliability in sealed, thermally isolated streetlight housings.

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
STP5NK50ZFP	500 V, 4.4 Ω R_DS(on), 19 nC Q_g, TO-220FP package	Higher R_DS(on) and larger through-hole footprint; lacks DPAK thermal pad efficiency	Choose when board space permits through-hole mounting and lower gate charge is not critical.
IXTP50N10P	100 V, 50 A, 12 mΩ R_DS(on), TO-220 package	Lower voltage rating and higher current capacity - unsuitable for 400 V DC bus applications	Select only for low-voltage (<150 V) high-current DC-DC stages, not as direct functional replacement.

Compared with STP5NK50ZFP and IXTP50N10P, IRFR420ATRLPBF offers superior thermal performance in surface-mount layouts, tighter V_GS(th) distribution (2.0–4.5 V), and proven avalanche ruggedness essential for cost-sensitive offline converters - making it the preferred choice where 500 V rating, DPAK form factor, and robustness are jointly required.

Availability

IRFR420ATRLPBF is available at Aetrix Electronics and suitable for switch mode power supplies, uninterruptible power supplies, and high-speed power switching applications requiring stable component supply across extended production lifecycles.

Supply support for IRFR420ATRLPBF 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 MOSFETs, diodes, and optoelectronics for power, signal, and sensing applications.

The IRFR420A family targets high-voltage industrial and consumer power conversion, emphasizing avalanche ruggedness, low gate charge, and thermal efficiency in compact surface-mount packages.

FAQ

What is the maximum continuous drain current for IRFR420ATRLPBF at 100 °C case temperature?

The maximum continuous drain current for IRFR420ATRLPBF is 2.1 A when the case temperature is maintained at 100 °C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limitations of the DPAK package and must be validated against actual PCB layout and heatsinking in the target application. IRFR420ATRLPBF maintains safe operation within this limit provided junction temperature does not exceed 150 °C.

Does IRFR420ATRLPBF have a fully characterized body diode, and what are its key parameters?

Yes, IRFR420ATRLPBF includes a fully characterized intrinsic body diode with documented reverse recovery time (t_rr = 330–500 ns), reverse recovery charge (Q_rr = 760–1140 μC), and forward voltage (V_SD = 1.6 V at 2.5 A). These values are measured per JEDEC standards and support reliable freewheeling in hard-switched topologies. IRFR420ATRLPBF's body diode is not optimized for synchronous rectification but meets requirements for standard flyback and buck-boost applications.

Can IRFR420ATRLPBF be used in avalanche mode, and what is its single-pulse energy rating?

Yes, IRFR420ATRLPBF is rated for repetitive and single-pulse avalanche operation, with a guaranteed single-pulse avalanche energy (E_AS) of 140 mJ under defined test conditions (L = 45 mH, R_g = 25 Ω, I_AS = 2.5 A). This rating allows safe operation during transient overvoltage events in unclamped inductive circuits. IRFR420ATRLPBF's avalanche ruggedness is validated per JEDEC JESD24-1 and forms part of its qualified reliability profile.

What is the gate threshold voltage range for IRFR420ATRLPBF, and how does it affect drive requirements?

The gate threshold voltage (V_GS(th)) for IRFR420ATRLPBF ranges from 2.0 V to 4.5 V at I_D = 250 μA, indicating it is a standard-threshold MOSFET requiring ≥10 V gate drive for full enhancement. This ensures compatibility with common 12 V or 15 V gate drivers while avoiding unintended turn-on from noise. IRFR420ATRLPBF achieves R_DS(on) = 3.0 Ω only when driven at V_GS = 10 V, so logic-level drivers (≤5 V) are insufficient.

Is IRFR420ATRLPBF RoHS-compliant and halogen-free, and what does the 'PbF' suffix indicate?

Yes, IRFR420ATRLPBF is lead (Pb)-free and halogen-free, compliant with RoHS Directive 2011/65/EU and Vishay's material categorization per document 99912. The 'PbF' suffix explicitly denotes lead-free termination finish, and 'TRL' indicates tape-and-reel packaging. IRFR420ATRLPBF meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is qualified for reflow soldering up to 260 °C peak temperature.

IRFR420ATRLPBF 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:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 500 V

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

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

Rds On (Max) @ Id, Vgs:: 3Ohm @ 1.5A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 17 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 340 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 83W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

IRFR420ATRLPBF FAQ

1.How can I place an order for IRFR420ATRLPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRFR420ATRLPBF 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 IRFR420ATRLPBF reliable?

The price and inventory of IRFR420ATRLPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFR420ATRLPBF is usually 5 days.

3.What payment methods are accepted for IRFR420ATRLPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFR420ATRLPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRFR420ATRLPBF?

IRFR420ATRLPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRFR420ATRLPBF 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 IRFR420ATRLPBF?

For technical support, including IRFR420ATRLPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFR420ATRLPBF requirements.

6.How does Aetrix verify that IRFR420ATRLPBF is sourced from the original manufacturer or authorized distributors?

All IRFR420ATRLPBF 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 IRFR420ATRLPBF meets industry standards.

7.What is the process for return or replacement of IRFR420ATRLPBF?

All IRFR420ATRLPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRFR420ATRLPBF, 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 IRFR420ATRLPBF part is unused and in its original packaging.

Return procedure for IRFR420ATRLPBF:

1.Submit a request within 90 days.

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

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