Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Vishay Siliconix IRFR420APBF

Name: IRFR420APBF
Brand: Vishay Siliconix
SKU: IRFR420APBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: IRFR420APBF

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

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

Datasheet:: IRFR420APBF.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,695

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

IRFR420APBF 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 IRFR420APBF datasheet, IRFR420APBF pinout, IRFR420APBF application, or IRFR420APBF equivalent, key selection criteria include its 500 V blocking rating, avalanche ruggedness, low Q_g/Q_gd ratio for fast hard-switching, body diode recovery performance (t_rr = 330–500 ns), and thermal resistance (R_thJC = 1.5 °C/W).

Technical Context

This device employs planar vertical DMOS technology with fully characterized avalanche capability and dV/dt ruggedness up to 3.4 V/ns. Its gate structure minimizes Miller capacitance (C_rss = 2.7 pF) and supports stable operation under high dv/dt transients common in flyback and forward converters.

The integrated body diode exhibits 1.6 V forward voltage at 2.5 A and controlled reverse recovery (Q_rr = 760–1140 μC), enabling reliable unclamped inductive switching. Thermal design is enabled by low R_thJC and a copper-tab DPAK package suitable for direct heatsinking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	500 V - supports 400 V DC bus designs with 25 % margin for surge and ringing
R_DS(on) @ V_GS = 10 V	3.0 Ω - enables <3.3 A continuous conduction at T_C = 100 °C with ≤10 W conduction loss
Q_g max	17 nC - allows simple gate drive with <1 W peak power using standard 10 Ω driver
E_AS	140 mJ - withstands unclamped inductive energy in 45 mH loads at I_AS = 2.5 A without failure
t_rr	330–500 ns - limits diode recovery losses and EMI in hard-switched topologies
R_thJC	1.5 °C/W - permits >60 W power dissipation with modest heatsink (ΔT = 90 °C)
I_D @ T_C = 100 °C	2.1 A - defines safe operating current under sustained high-temperature PCB mounting

Pinout & Package

DPAK (TO-252) package with exposed drain tab for thermal and electrical connection; 3-pin surface-mount outline per JEDEC MS-012, compatible with IPC-7351B footprint (10.67 × 6.18 mm pad layout recommended).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (G)	Gate	Controls channel conduction; requires 2.0–4.5 V threshold and ≤±30 V absolute max rating
Pin 2 (D)	Drain	High-side switch node; electrically and thermally connected to exposed copper tab
Pin 3 (S)	Source	Power return path; referenced to gate drive ground; carries full load current and body diode reverse recovery current

Key Features

Feature	Design Value
Low Q_g/Q_gd ratio (17 nC / 8.5 nC)	Reduces Miller-induced turn-off delay and improves switching controllability in high-dv/dt environments
Fully characterized C_{oss eff.} (28 pF)	Enables accurate snubber and resonant timing calculations across 0–400 V V_DS range
Specified peak dV/dt immunity (3.4 V/ns)	Prevents false turn-on during fast transient events in high-side configurations
140 mJ single-pulse avalanche rating	Eliminates need for external clamping in many flyback transformer reset applications
Body diode Q_rr = 760–1140 μC	Supports predictable recovery behavior in synchronous rectifier or freewheeling roles

Applications

Offline AC-DC Adapters	Uninterruptible Power Supplies (UPS)
Use Scenario: Primary-side switch in 65–150 W flyback converters operating from 85–265 V_AC input. IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer into transformer primary; operates at 65–135 kHz with hard switching. Use Value: 500 V rating accommodates 385 V DC link plus line surges; 140 mJ E_AS handles transformer leakage inductance spikes without snubber.	Use Scenario: Inverter stage H-bridge switch in 500–2000 VA line-interactive UPS systems. IC Role / Device Role / Timing Role: Low-side switching element in half-bridge output stage; commutated at 20–50 kHz with dead-time control. Use Value: 3.3 A continuous current and 2.1 A at 100 °C enable compact thermal design; body diode t_rr ensures clean freewheeling during PWM dead time.
Industrial Motor Drives	LED Driver Power Stages
Use Scenario: High-side switch in 24–48 V DC-fed brushless DC motor gate drivers for HVAC blowers and pumps. IC Role / Device Role / Timing Role: Fast-switching power FET in three-phase inverter leg; driven by isolated gate driver with 21 Ω series resistance. Use Value: 8.1 ns turn-on delay and 13 ns fall time minimize switching losses; low C_iss (340 pF) reduces gate drive power demand.	Use Scenario: Buck/boost switch in constant-current LED drivers for street lighting (30–100 W). IC Role / Device Role / Timing Role: Main energy-transfer switch operating at 100–300 kHz in critical conduction mode (CRM) or fixed-frequency PWM. Use Value: 3.0 Ω R_DS(on) limits conduction loss below 300 mW at 1.5 A; Q_g = 17 nC enables efficient 100 kHz+ operation with minimal driver overhead.

Offline AC-DC Adapters

Uninterruptible Power Supplies (UPS)

Use Scenario: Primary-side switch in 65–150 W flyback converters operating from 85–265 V_AC input.

IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer into transformer primary; operates at 65–135 kHz with hard switching.

Use Value: 500 V rating accommodates 385 V DC link plus line surges; 140 mJ E_AS handles transformer leakage inductance spikes without snubber.

Use Scenario: Inverter stage H-bridge switch in 500–2000 VA line-interactive UPS systems.

IC Role / Device Role / Timing Role: Low-side switching element in half-bridge output stage; commutated at 20–50 kHz with dead-time control.

Use Value: 3.3 A continuous current and 2.1 A at 100 °C enable compact thermal design; body diode t_rr ensures clean freewheeling during PWM dead time.

Industrial Motor Drives

LED Driver Power Stages

Use Scenario: High-side switch in 24–48 V DC-fed brushless DC motor gate drivers for HVAC blowers and pumps.

IC Role / Device Role / Timing Role: Fast-switching power FET in three-phase inverter leg; driven by isolated gate driver with 21 Ω series resistance.

Use Value: 8.1 ns turn-on delay and 13 ns fall time minimize switching losses; low C_iss (340 pF) reduces gate drive power demand.

Use Scenario: Buck/boost switch in constant-current LED drivers for street lighting (30–100 W).

IC Role / Device Role / Timing Role: Main energy-transfer switch operating at 100–300 kHz in critical conduction mode (CRM) or fixed-frequency PWM.

Use Value: 3.0 Ω R_DS(on) limits conduction loss below 300 mW at 1.5 A; Q_g = 17 nC enables efficient 100 kHz+ operation with minimal driver overhead.

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), 12 nC Q_g, TO-220FP package	Higher R_DS(on) but lower gate charge; through-hole mounting only	Preferred where board space allows through-hole and lower gate drive power is critical
IXTP50N10P	100 V, 50 A, 0.022 Ω R_DS(on), TO-220 package	Lower voltage rating; unsuitable for 400 V bus; higher current capacity	Only viable in low-voltage (<120 V) motor or battery-powered applications

Compared with STP5NK50ZFP and IXTP50N10P, the IRFR420APBF offers superior voltage margin and surface-mount compatibility for compact AC-DC designs, while trading off some gate charge efficiency for robust avalanche performance and thermal interface via DPAK drain tab.

Availability

IRFR420APBF is available at Aetrix Electronics and suitable for offline AC-DC adapters, uninterruptible power supplies, and industrial motor drives requiring stable component supply and long-term manufacturing continuity.

Supply support for IRFR420APBF 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 IRFR420APBF belongs to Vishay's high-voltage power MOSFET family designed for rugged, high-efficiency switching in industrial and computing power supplies where avalanche capability and thermal performance are critical.

FAQ

What is the maximum continuous drain current for IRFR420APBF at 100 °C case temperature?

The IRFR420APBF supports 2.1 A continuous drain current at T_C = 100 °C, as specified in the Absolute Maximum Ratings table. This value reflects thermal derating from the 3.3 A rating at 25 °C and ensures safe operation under sustained high-temperature PCB conditions without exceeding junction temperature limits.

Does IRFR420APBF have avalanche capability, and how is it rated?

Yes, the IRFR420APBF is fully rated for repetitive and single-pulse avalanche. It delivers 140 mJ single-pulse avalanche energy (E_AS) and supports 2.5 A repetitive avalanche current (I_AR) with 5.0 mJ per pulse (E_AR). These values are validated per test condition L = 45 mH, R_g = 25 Ω, and starting T_J = 25 °C.

What is the gate threshold voltage range for IRFR420APBF, and why does it matter?

The IRFR420APBF has a gate threshold voltage (V_GS(th)) range of 2.0 V to 4.5 V at T_J = 25 °C. This wide range ensures reliable turn-on across process variation and temperature, but requires gate drive circuits to deliver ≥10 V to guarantee full enhancement and minimize R_DS(on) dispersion in production systems.

Can IRFR420APBF be used in place of logic-level MOSFETs?

No - the IRFR420APBF is not a logic-level device. Its V_GS(th) minimum is 2.0 V, but it requires ≥10 V gate drive to achieve rated R_DS(on) = 3.0 Ω. Logic-level equivalents like the IRLR024Z require only 4.5 V for full enhancement and are incompatible due to different threshold and on-resistance profiles.

What is the thermal resistance from junction to case (R_thJC) for IRFR420APBF, and how is it measured?

The IRFR420APBF has a maximum junction-to-case (drain) thermal resistance of 1.5 °C/W, measured from the silicon die to the exposed drain tab surface. This value assumes ideal thermal interface (flat, greased surface) and enables precise heatsink sizing when the drain tab is directly mounted to a thermal plane or heatsink.

IRFR420APBF Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

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

Packaging:: Tube

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

IRFR420APBF FAQ

1.How can I place an order for IRFR420APBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRFR420APBF 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 IRFR420APBF reliable?

The price and inventory of IRFR420APBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFR420APBF is usually 5 days.

3.What payment methods are accepted for IRFR420APBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFR420APBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRFR420APBF?

IRFR420APBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRFR420APBF 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 IRFR420APBF?

For technical support, including IRFR420APBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFR420APBF requirements.

6.How does Aetrix verify that IRFR420APBF is sourced from the original manufacturer or authorized distributors?

All IRFR420APBF 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 IRFR420APBF meets industry standards.

7.What is the process for return or replacement of IRFR420APBF?

All IRFR420APBF units undergo pre-shipment inspection (PSI). If there is an issue with IRFR420APBF, 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 IRFR420APBF part is unused and in its original packaging.

Return procedure for IRFR420APBF:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …