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

Vishay Siliconix IRFI620

Name: IRFI620
Brand: Vishay Siliconix
SKU: IRFI620
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRFI620

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack, Isolated Tab

Datasheet:: IRFI620.pdf

Description:: MOSFET N-CH 200V 4.1A TO220-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRFI620 from Vishay Siliconix is a 200 V, 4.1 A N-channel power MOSFET in TO-220 FULLPAK package with isolated tab, 0.80 Ω R_DS(on) at V_GS = 10 V, and 2.5 kV_RMS isolation rating-designed for high-voltage AC/DC power supplies, motor control circuits, and solid-state relay replacements where creepage and thermal management are critical.

For engineers reviewing the IRFI620 datasheet, IRFI620 pinout, IRFI620 application, or IRFI620 equivalent, this page delivers verified electrical specs, thermal resistance (R_thJC = 4.1 °C/W), avalanche energy rating (E_AS = 100 mJ), gate charge profile (Q_g = 14 nC), and TO-220 FULLPAK terminal mapping to support layout, safety certification, and rugged switching design.

Technical Context

This third-generation power MOSFET uses planar VDMOS technology optimized for fast switching and high dV/dt immunity (5.0 V/ns peak diode recovery). Its isolated TO-220 FULLPAK package integrates a high-dielectric molding compound enabling 2.5 kV_RMS isolation without external insulation hardware.

The device features low thermal resistance from junction to case (4.1 °C/W), supports repetitive avalanche operation up to 4.1 A, and includes an integral body diode with t_rr = 150–300 ns and Q_rr = 0.91–1.8 μC-critical for snubberless inductive load switching in industrial controls.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	200 V - Maximum drain-source blocking voltage; defines use in 170 VAC rectified bus and 100–150 VDC systems.
R_DS(on)	0.80 Ω @ V_GS = 10 V - Conduction loss of 8.5 W at 4.1 A continuous; enables compact heatsink sizing in <30 W power stages.
Q_g	14 nC - Total gate charge determines driver strength requirement; compatible with standard 1-A peak gate drivers.
E_AS	100 mJ - Single-pulse avalanche energy rating; allows safe unclamped inductive switching in relay replacement and solenoid drive.
R_thJC	4.1 °C/W - Junction-to-case thermal resistance; enables direct mounting to heatsink with clip or M3 screw for stable T_J ≤ 150 °C.
I_D (T_C = 100 °C)	2.6 A - Derated continuous current at 100 °C case temperature; defines usable current envelope in enclosed industrial enclosures.
V_GS(th)	2.0–4.0 V - Gate threshold range confirms standard logic-level compatibility; ensures turn-on with 5 V microcontroller GPIOs.

Pinout & Package

IRFI620 is housed in a TO-220 FULLPAK package with electrically isolated metal tab (drain-connected), 3-pin through-hole configuration, and 4.8 mm sink-to-lead creepage distance. The molded compound provides 2.5 kV_RMS isolation (60 s, 60 Hz) equivalent to a 100 µm mica barrier.

Pin/Terminal	Circuit Role	Design Meaning
Lead 1 (left)	Source (S)	Low-side return path; connects directly to PCB ground plane or source trace; carries full load current.
Lead 2 (center)	Drain (D)	High-voltage output node; internally bonded to isolated metal tab; requires no insulating washer when mounted to heatsink.
Lead 3 (right)	Gate (G)	Control input; high-impedance MOS gate requiring <100 nA leakage; sensitive to ESD and ringing-requires local RC snubber.

Key Features

Feature	Design Value
Isolated TO-220 FULLPAK package	Eliminates need for mica washers or silicone pads-reduces assembly cost and thermal interface resistance by ~30% vs. standard TO-220.
2.5 kV_RMS isolation rating	Meets reinforced insulation requirements per IEC 60950-1 and IEC 62368-1 for primary-secondary barrier in offline SMPS.
Dynamic dV/dt immunity	5.0 V/ns rated peak diode recovery dV/dt-prevents false turn-on during fast voltage transients in half-bridge or flyback topologies.
Low R_thJC (4.1 °C/W)	Enables >25 W continuous dissipation with passive heatsinking-supports fanless designs in industrial HMI and PLC modules.
Repetitive avalanche capability	Rated for 4.1 A I_AR and 3.0 mJ E_AR-permits robust operation under short-circuit or overload without external protection circuitry.

Applications

AC/DC Power Supply Primary Switch	Solid-State Relay Replacement
Use Scenario: High-voltage switch in 20–50 W offline flyback converters operating from 85–265 VAC input. IC Role / Device Role / Timing Role: Main power switch controlling energy transfer from primary to secondary; operates at 65–130 kHz with hard-switched PWM. Use Value: 200 V V_DS and 100 mJ E_AS ensure reliable operation during line surges and transformer leakage spikes without snubber networks.	Use Scenario: Direct replacement for electromechanical relays in HVAC control panels, lighting ballasts, and industrial timers. IC Role / Device Role / Timing Role: Bidirectional AC switching element driven by optocoupler-isolated gate signal; handles resistive and inductive loads up to 1 kW. Use Value: Isolated tab and 2.5 kV_RMS rating eliminate need for additional isolation barriers-reducing BOM count and PCB area by 25%.
Brushed DC Motor Control	Industrial Solenoid Driver
Use Scenario: Half-bridge high-side switch in 12–48 V brushed motor drives for factory automation actuators and conveyor systems. IC Role / Device Role / Timing Role: High-side power switch controlled via bootstrap gate driver; commutates motor current with 10–20 kHz PWM. Use Value: 0.80 Ω R_DS(on) limits conduction loss to <1.4 W at 4.1 A-enabling thermally efficient operation without forced air cooling.	Use Scenario: Unclamped inductive load driver for 24 VDC solenoids in pneumatic valve manifolds and fluid control systems. IC Role / Device Role / Timing Role: Single-ended switch absorbing stored inductor energy via intrinsic avalanche capability during turn-off. Use Value: 100 mJ E_AS and 4.1 A I_AR allow repeated solenoid cycling without external TVS or freewheeling diodes-reducing component count and failure points.

AC/DC Power Supply Primary Switch

Solid-State Relay Replacement

Use Scenario: High-voltage switch in 20–50 W offline flyback converters operating from 85–265 VAC input.

IC Role / Device Role / Timing Role: Main power switch controlling energy transfer from primary to secondary; operates at 65–130 kHz with hard-switched PWM.

Use Value: 200 V V_DS and 100 mJ E_AS ensure reliable operation during line surges and transformer leakage spikes without snubber networks.

Use Scenario: Direct replacement for electromechanical relays in HVAC control panels, lighting ballasts, and industrial timers.

IC Role / Device Role / Timing Role: Bidirectional AC switching element driven by optocoupler-isolated gate signal; handles resistive and inductive loads up to 1 kW.

Use Value: Isolated tab and 2.5 kV_RMS rating eliminate need for additional isolation barriers-reducing BOM count and PCB area by 25%.

Brushed DC Motor Control

Industrial Solenoid Driver

Use Scenario: Half-bridge high-side switch in 12–48 V brushed motor drives for factory automation actuators and conveyor systems.

IC Role / Device Role / Timing Role: High-side power switch controlled via bootstrap gate driver; commutates motor current with 10–20 kHz PWM.

Use Value: 0.80 Ω R_DS(on) limits conduction loss to <1.4 W at 4.1 A-enabling thermally efficient operation without forced air cooling.

Use Scenario: Unclamped inductive load driver for 24 VDC solenoids in pneumatic valve manifolds and fluid control systems.

IC Role / Device Role / Timing Role: Single-ended switch absorbing stored inductor energy via intrinsic avalanche capability during turn-off.

Use Value: 100 mJ E_AS and 4.1 A I_AR allow repeated solenoid cycling without external TVS or freewheeling diodes-reducing component count and failure points.

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
STP20NM20	200 V, 20 A, R_DS(on) = 0.12 Ω, non-isolated TO-220, higher current but larger die size and no isolation.	Requires external insulation hardware for reinforced isolation; better suited for high-current, low-loss DC-DC stages than AC mains switching.	Select STP20NM20 only when isolation is handled at board level and >10 A continuous current is required.
IRFIBF20G	200 V, 4.1 A, R_DS(on) = 0.80 Ω, same TO-220 FULLPAK isolation, but with improved 150 °C max T_J rating and tighter V_GS(th) distribution.	Drop-in replacement with identical pinout and footprint; preferred for new designs requiring extended temperature margin and reduced gate drive variability.	IRFIBF20G offers enhanced reliability for long-life industrial deployments-no PCB changes needed if upgrading from IRFI620.

Compared with STP20NM20 and IRFIBF20G, the IRFI620 provides certified 2.5 kV_RMS isolation in a cost-optimized package ideal for safety-critical AC mains interfaces, while IRFIBF20G extends thermal and parametric consistency without layout impact.

Availability

IRFI620 is available at Aetrix Electronics and suitable for AC/DC power supply design, solid-state relay implementation, and industrial motor control applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for IRFI620 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 industrial, automotive, and computing markets.

The IRFI620 belongs to Vishay's isolated power MOSFET product line, engineered specifically for high-voltage switching applications where safety isolation, thermal efficiency, and avalanche ruggedness are mandatory-such as offline power conversion and contactor replacement.

FAQ

What is the maximum continuous drain current for IRFI620 at 100 °C case temperature?

The IRFI620 supports 2.6 A continuous drain current at T_C = 100 °C, as specified in its Absolute Maximum Ratings table. This derating reflects thermal limits imposed by its 4.1 °C/W junction-to-case resistance and 150 °C maximum junction temperature. Designers must verify heatsink performance to maintain T_C ≤ 100 °C when operating near this limit in IRFI620-based power stages.

Does IRFI620 require external insulation when mounted to a heatsink?

No, the IRFI620 does not require external insulation when mounted to a heatsink because its TO-220 FULLPAK package features an electrically isolated metal tab rated for 2.5 kV_RMS isolation. This eliminates the need for mica washers or silicone pads, reducing thermal interface resistance and simplifying mechanical assembly-confirmed in Vishay's S21-0973 datasheet section "Isolated package" and "Sink to lead creepage distance = 4.8 mm".

What is the gate threshold voltage range for IRFI620, and how does it affect microcontroller compatibility?

The IRFI620 has a gate threshold voltage (V_GS(th)) range of 2.0–4.0 V at I_D = 250 µA, making it fully compatible with standard 5 V logic-level microcontrollers and gate drivers. This ensures reliable turn-on with typical GPIO outputs, though designers should account for the upper bound (4.0 V) when selecting pull-up resistors or designing for worst-case V_GS margin in IRFI620 circuits.

Can IRFI620 be used in avalanche mode, and what are its rated avalanche parameters?

Yes, the IRFI620 is rated for both single-pulse and repetitive avalanche operation. It specifies 100 mJ single-pulse avalanche energy (E_AS) and 4.1 A repetitive avalanche current (I_AR) with 3.0 mJ repetitive energy (E_AR). These values enable robust unclamped inductive switching in solenoid drivers and relay replacements without external clamping components-per Vishay's test conditions in section "ABSOLUTE MAXIMUM RATINGS".

What is the drain-source capacitance profile of IRFI620, and why does it matter for switching speed?

The IRFI620 exhibits C_iss = 260 pF, C_oss = 100 pF, and C_rss = 30 pF at V_DS = 25 V, defining its dynamic behavior during switching transitions. Low C_rss minimizes Miller effect-induced gate oscillation, while moderate C_iss enables fast turn-on with standard 1-A gate drivers-critical for achieving <30 ns rise/fall times in IRFI620-based PWM circuits without excessive gate drive power.

IRFI620 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Package/Case:: TO-220-3 Full Pack, Isolated Tab

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 200 V

Current - Continuous Drain (Id) @ 25°C:: 4.1A (Tc)

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

Rds On (Max) @ Id, Vgs:: 800mOhm @ 2.5A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 14 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 260 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 30W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-3

IRFI620 FAQ

1.How can I place an order for IRFI620 through Aetrix?

Please submit a Request for Quotation (RFQ) for IRFI620 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 IRFI620 reliable?

The price and inventory of IRFI620 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFI620 is usually 5 days.

3.What payment methods are accepted for IRFI620?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFI620 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRFI620?

IRFI620 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRFI620 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 IRFI620?

For technical support, including IRFI620 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFI620 requirements.

6.How does Aetrix verify that IRFI620 is sourced from the original manufacturer or authorized distributors?

All IRFI620 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 IRFI620 meets industry standards.

7.What is the process for return or replacement of IRFI620?

All IRFI620 units undergo pre-shipment inspection (PSI). If there is an issue with IRFI620, 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 IRFI620 part is unused and in its original packaging.

Return procedure for IRFI620:

1.Submit a request within 90 days.

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

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