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

Vishay Siliconix IRF820STRLPBF

Name: IRF820STRLPBF
Brand: Vishay Siliconix
SKU: IRF820STRLPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRF820STRLPBF

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

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

Datasheet:: IRF820STRLPBF.pdf

Description:: MOSFET N-CH 500V 2.5A D2PAK

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Product details

Overview

IRF820STRLPBF from Vishay Siliconix is a 500 V, 2.5 A N-channel surface-mount power MOSFET in D2PAK (TO-263) package, featuring 3.0 Ω R_DS(on) at V_GS = 10 V, 24 nC total gate charge, and repetitive avalanche rating-designed for high-voltage switching in offline SMPS, AC-DC adapters, and industrial motor controls.

For engineers reviewing the IRF820STRLPBF datasheet, IRF820STRLPBF pinout, IRF820STRLPBF application, or IRF820STRLPBF equivalent, this part supports fast-switching, ruggedized operation with dynamic dV/dt capability, ease of paralleling, and simple gate drive-key selection criteria for reliable high-voltage DC-DC and flyback converter designs.

Technical Context

This third-generation power MOSFET uses planar V-groove technology to achieve optimized trade-offs between conduction loss (R_DS(on) = 3.0 Ω), switching speed (t_r = 8.6 ns, t_f = 16 ns), and ruggedness-including 210 mJ single-pulse avalanche energy and 3.5 V/ns peak diode recovery dV/dt rating.

Its D2PAK package delivers low thermal resistance (R_thJC = 2.5 °C/W) and high power dissipation (50 W at T_C = 25 °C), while the integrated body diode exhibits t_rr = 260–520 ns and Q_rr = 0.70–1.4 μC-critical for minimizing switching losses in hard-commutated topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	500 V - Withstands full mains-referenced DC bus voltages in universal-input offline converters
R_DS(on) @ V_GS = 10 V	3.0 Ω - Enables <2.5 A continuous conduction with ≤19 W conduction loss at 25 °C case temperature
Q_g	24 nC - Determines gate drive power requirement; compatible with standard 1-A peak gate drivers
I_D (continuous, T_C = 25 °C)	2.5 A - Supports medium-power applications such as 30–50 W flyback or forward converters
E_AS	210 mJ - Provides robust unclamped inductive switching margin without external snubbers
t_r/t_f	8.6 ns / 16 ns - Enables >100 kHz switching frequencies with controlled EMI generation
T_J range	−55 to +150 °C - Qualified for industrial and extended-temperature embedded power systems

Pinout & Package

D2PAK (TO-263) surface-mount package with isolated heat slug (drain-connected tab); 3-pin configuration optimized for high-current PCB mounting and thermal management on 1" FR-4 squares.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (G)	Gate	Control terminal; requires ≤±20 V drive; 100 nA leakage ensures low standby current
Pin 2 (D)	Drain	Main power output; electrically connected to exposed thermal pad-must be routed to ground plane or heatsink
Pin 3 (S)	Source	Power return and gate reference; internal source inductance (L_S = 7.5 nH) impacts high-speed switching stability

Key Features

Feature	Design Value
Repetitive avalanche rated	Enables reliable operation under transient overloads without derating-EAR = 5.0 mJ per pulse
Dynamic dV/dt rating	3.5 V/ns minimum prevents false turn-on during high-slew-rate voltage transients in bridge circuits
Fast switching	Combined t_d(on)/t_r/t_d(off)/t_f < 66 ns reduces switching losses in high-frequency SMPS
Ease of paralleling	Positive temperature coefficient of R_DS(on) ensures self-balancing current sharing across multiple devices
Simple drive requirements	Low Q_gs/Q_gd ratio (3.3 nC / 13 nC) enables stable Miller-effect immunity with minimal gate resistor tuning

Applications

AC-DC Adapter Power Stage	Flyback Converter Primary Switch
Use Scenario: 24–48 W universal-input (85–265 V_AC) wall adapter with primary-side regulation. IC Role / Device Role / Timing Role: Main high-side switching element in discontinuous conduction mode (DCM) flyback topology. Use Value: 500 V V_DS rating accommodates reflected output voltage plus leakage spike; 2.5 A I_D supports typical peak currents up to 4 A with margin.	Use Scenario: Isolated auxiliary power supply for industrial PLC I/O modules. IC Role / Device Role / Timing Role: Primary-side power switch operating at 65 kHz with synchronous rectification on secondary. Use Value: Low Q_g (24 nC) minimizes gate driver losses; rugged avalanche rating handles transformer leakage energy without clamping.
Offline LED Driver	Industrial Motor Control Interface
Use Scenario: Constant-current buck-boost LED driver for street lighting (230 V_AC input). IC Role / Device Role / Timing Role: High-side switch in active PFC + DC-DC stage, handling 50–100 kHz switching. Use Value: 3.0 Ω R_DS(on) limits conduction loss at 1.5 A load; TO-263 thermal performance sustains >70 °C ambient operation.	Use Scenario: Half-bridge gate driver interface for 24 V DC brushed motor control in factory automation. IC Role / Device Role / Timing Role: Low-side switch controlling motor enable/disable and direction logic sequencing. Use Value: Fast t_f (16 ns) ensures clean PWM edge transitions; body diode t_rr < 520 ns prevents shoot-through during commutation.

AC-DC Adapter Power Stage

Flyback Converter Primary Switch

Use Scenario: 24–48 W universal-input (85–265 V_AC) wall adapter with primary-side regulation.

IC Role / Device Role / Timing Role: Main high-side switching element in discontinuous conduction mode (DCM) flyback topology.

Use Value: 500 V V_DS rating accommodates reflected output voltage plus leakage spike; 2.5 A I_D supports typical peak currents up to 4 A with margin.

Use Scenario: Isolated auxiliary power supply for industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Primary-side power switch operating at 65 kHz with synchronous rectification on secondary.

Use Value: Low Q_g (24 nC) minimizes gate driver losses; rugged avalanche rating handles transformer leakage energy without clamping.

Offline LED Driver

Industrial Motor Control Interface

Use Scenario: Constant-current buck-boost LED driver for street lighting (230 V_AC input).

IC Role / Device Role / Timing Role: High-side switch in active PFC + DC-DC stage, handling 50–100 kHz switching.

Use Value: 3.0 Ω R_DS(on) limits conduction loss at 1.5 A load; TO-263 thermal performance sustains >70 °C ambient operation.

Use Scenario: Half-bridge gate driver interface for 24 V DC brushed motor control in factory automation.

IC Role / Device Role / Timing Role: Low-side switch controlling motor enable/disable and direction logic sequencing.

Use Value: Fast t_f (16 ns) ensures clean PWM edge transitions; body diode t_rr < 520 ns prevents shoot-through during commutation.

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
STP5NK50ZFP	500 V, 4.5 A, R_DS(on) = 1.4 Ω, D²PAK, Zener-protected gate	Higher current rating but lower avalanche ruggedness (E_AS = 120 mJ)	Prefer when higher continuous current is needed and avalanche stress is minimal
IXTP50N10P	100 V, 50 A, R_DS(on) = 0.022 Ω, TO-220, no avalanche rating	Lower voltage rating; unsuitable for >200 V DC bus applications	Only viable in low-voltage (<120 V) motor drive or battery-fed systems

Compared with STP5NK50ZFP and IXTP50N10P, the IRF820STRLPBF offers superior avalanche ruggedness and voltage margin for universal-input offline converters, while maintaining competitive gate charge and thermal performance in D2PAK-making it optimal where reliability under transient overload is critical.

Availability

IRF820STRLPBF is available at Aetrix Electronics and suitable for AC-DC adapters, flyback converters, and industrial motor control interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for IRF820STRLPBF 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 IRF820STRLPBF belongs to Vishay's third-generation high-voltage power MOSFET family, engineered specifically for rugged, high-efficiency switching in offline power supplies and industrial power conversion systems.

FAQ

What is the maximum continuous drain current rating for IRF820STRLPBF at 100 °C case temperature?

The IRF820STRLPBF has a continuous drain current rating of 1.6 A at T_C = 100 °C, derived from its 2.5 A rating at 25 °C and linear derating factor of 0.40 W/°C. This reflects real-world thermal constraints in compact enclosed power supplies where heatsinking is limited. The IRF820STRLPBF maintains safe operation within its SOA when operated below this limit with appropriate PCB copper area.

Does IRF820STRLPBF have a built-in gate protection diode?

No, the IRF820STRLPBF does not integrate a gate-source Zener diode. Its absolute maximum V_GS rating is ±20 V, and gate leakage remains ≤±100 nA at ±20 V. External gate protection-such as a 12–15 V Zener clamp-is recommended in noisy environments or when driving with non-isolated controllers. This design choice preserves low Q_g and ensures compatibility with standard gate drivers used with the IRF820STRLPBF.

Can IRF820STRLPBF be used in avalanche mode for energy recovery applications?

Yes, the IRF820STRLPBF is explicitly repetitive avalanche rated with E_AR = 5.0 mJ per pulse and I_AR = 2.5 A, validated per test condition b (V_DD = 50 V, L = 60 mH, R_g = 25 Ω). It is suitable for controlled avalanche in snubberless flyback or resonant converters where precise energy absorption is required-provided junction temperature stays within −55 to +150 °C. The IRF820STRLPBF datasheet confirms this capability in Fig. 12c.

What is the thermal resistance from junction to case (R_thJC) for IRF820STRLPBF?

The IRF820STRLPBF has a maximum junction-to-case thermal resistance (R_thJC) of 2.5 °C/W, measured from die to the D2PAK drain tab. This value enables efficient heat transfer to an external heatsink or large PCB copper pour. When mounted on a 1" square FR-4 board, its effective R_thJA is 40 °C/W-allowing 3.1 W dissipation at T_A = 25 °C. This thermal performance is integral to the IRF820STRLPBF's suitability in space-constrained power designs.

Is IRF820STRLPBF lead-free and RoHS-compliant?

Yes, IRF820STRLPBF is lead (Pb)-free and halogen-free, compliant with EU RoHS Directive 2011/65/EU and JEDEC JS709. The "PbF" suffix denotes lead-free termination, and the device meets Vishay's material categorization standard per doc# 99912. Full compliance documentation, including test reports and substance declarations, is available for the IRF820STRLPBF through Vishay's official portal and Aetrix Electronics' quality archive.

IRF820STRLPBF 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):: 500 V

Current - Continuous Drain (Id) @ 25°C:: 2.5A (Tc)

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

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

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 24 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 360 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)

IRF820STRLPBF FAQ

1.How can I place an order for IRF820STRLPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRF820STRLPBF 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 IRF820STRLPBF reliable?

The price and inventory of IRF820STRLPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRF820STRLPBF is usually 5 days.

3.What payment methods are accepted for IRF820STRLPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRF820STRLPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRF820STRLPBF?

IRF820STRLPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRF820STRLPBF 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 IRF820STRLPBF?

For technical support, including IRF820STRLPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRF820STRLPBF requirements.

6.How does Aetrix verify that IRF820STRLPBF is sourced from the original manufacturer or authorized distributors?

All IRF820STRLPBF 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 IRF820STRLPBF meets industry standards.

7.What is the process for return or replacement of IRF820STRLPBF?

All IRF820STRLPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRF820STRLPBF, 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 IRF820STRLPBF part is unused and in its original packaging.

Return procedure for IRF820STRLPBF:

1.Submit a request within 90 days.

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

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