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

Vishay Siliconix IRLI520G

Name: IRLI520G
Brand: Vishay Siliconix
SKU: IRLI520G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLI520G

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

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

Datasheet:: IRLI520G.pdf

Description:: MOSFET N-CH 100V 7.2A TO220-3

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Inventory:5,089

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Product details

Overview

IRLI520G from Vishay Siliconix is a 100 V, 7.2 A N-channel power MOSFET in TO-220 FULLPAK package with logic-level gate drive (V_GS(th) = 1.0–2.0 V), R_DS(on) = 0.27 Ω at V_GS = 5 V, and 2.5 kV_RMS isolation for high-voltage industrial switching applications such as AC/DC SMPS primary-side switches and isolated DC-DC converters.

For engineers reviewing the IRLI520G datasheet, IRLI520G pinout, IRLI520G application, or IRLI520G equivalent, this device is selected for high-reliability, isolated high-side switching where creepage ≥4.8 mm, avalanche energy rating (E_AS = 170 mJ), and low thermal resistance (R_thJC = 4.1 °C/W) are critical design requirements.

Technical Context

The IRLI520G uses third-generation trench-gate silicon technology optimized for fast switching and rugged unclamped inductive switching (UIS) performance. Its isolated TO-220 FULLPAK construction eliminates external insulation hardware while maintaining full electrical isolation between drain and heatsink.

It features logic-compatible gate drive (V_GS(th) ≤ 2.0 V, R_DS(on) specified at V_GS = 4 V and 5 V), low Q_g = 12 nC for efficient PWM control, and integrated body diode with t_rr = 130–190 ns and Q_rr = 0.83–1.0 μC - enabling use in synchronous rectification and freewheeling topologies without external diodes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - supports 80 V DC bus designs with 20 % margin for voltage transients
R_DS(on) @ V_GS = 5 V	0.27 Ω - enables <7.2 A continuous conduction with ≤10 W conduction loss at T_C = 25 °C
Q_g	12 nC - reduces gate drive power and allows use with low-current logic-level drivers
E_AS	170 mJ - withstands single-pulse inductive energy without failure in flyback or forward converter snubbers
R_thJC	4.1 °C/W - permits direct mounting to heatsink with minimal thermal interface resistance
V_ISOL	2.5 kV_RMS/60 s - meets reinforced insulation requirements per IEC 60950-1 and IEC 62368-1
t_r/t_f	64 ns / 27 ns - supports >500 kHz switching in hard-switched topologies with low switching loss

Pinout & Package

IRLI520G is housed in a TO-220 FULLPAK package with exposed drain tab (electrically connected to drain), providing high-voltage isolation and low thermal resistance. The molded compound delivers 2.5 kV_RMS isolation and 4.8 mm sink-to-lead creepage distance.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main current path output / heatsink connection	Electrically active drain terminal; must be insulated from chassis unless system ground referenced; provides lowest R_thJC
Gate	Control input for channel conduction	Logic-level compatible (V_GS(th) = 1.0–2.0 V); requires <12 nC charge for full enhancement
Source	Reference node for gate drive and current return	Common reference for gate-source voltage; internal source inductance L_S = 7.5 nH affects high-dI/dt ringing

Key Features

Feature	Design Value
High-voltage isolation	2.5 kV_RMS/60 s enables elimination of mica washers and insulating sleeves in commercial-industrial power supplies
Logic-level gate drive	V_GS(th) max 2.0 V and R_DS(on) guaranteed at V_GS = 4 V allow direct microcontroller GPIO or optocoupler driver interface
Rugged UIS capability	E_AS = 170 mJ and I_AR = 7.2 A support reliable operation under inductive load turn-off stress without external clamping
Low Q_gd/Q_g ratio	Q_gd = 7.1 nC / Q_g = 12 nC = 59 % - improves Miller immunity and enables stable hard-switching above 300 kHz
Optimized body diode	t_rr = 130–190 ns and Q_rr = 0.83–1.0 μC reduce reverse recovery loss and EMI in freewheeling paths

Applications

AC/DC Switch-Mode Power Supplies	Isolated DC-DC Converters
Use Scenario: Primary-side switch in 50–200 W offline flyback or forward converters with universal AC input (85–265 V_AC). IC Role / Device Role / Timing Role: High-side N-channel MOSFET switching element controlled by PWM controller; handles full mains-referred drain voltage and current. Use Value: 2.5 kV_RMS isolation and 4.8 mm creepage meet reinforced insulation requirements without additional hardware; R_DS(on) = 0.27 Ω minimizes conduction loss at 7.2 A peak.	Use Scenario: Primary-side switch in 30–100 W isolated half-bridge or push-pull DC-DC modules for telecom or industrial rail systems. IC Role / Device Role / Timing Role: High-voltage switching transistor in transformer-coupled topology; subjected to repetitive avalanche stress during dead-time transitions. Use Value: E_AS = 170 mJ and I_AR = 7.2 A ensure robustness against transformer leakage inductance energy; TO-220 FULLPAK simplifies heatsinking in compact modules.
Motor Drive Protection Circuits	Industrial Solid-State Relays
Use Scenario: Overcurrent protection switch in 24–48 V BLDC motor gate driver stages or H-bridge fault isolation circuits. IC Role / Device Role / Timing Role: Fast-acting series disconnect MOSFET triggered by current-sense comparator during stall or short-circuit events. Use Value: t_on/t_off < 35 ns and dV/dt rating of 5.5 V/ns enable sub-microsecond response; logic-level gate allows direct MCU control without level-shifting.	Use Scenario: Output switching element in DIN-rail mounted SSRs replacing electromechanical relays in PLC I/O modules and HVAC controls. IC Role / Device Role / Timing Role: Isolated high-voltage load switch with integrated heatsink interface; operates at 50/60 Hz with infrequent switching cycles. Use Value: 100 V V_DS rating supports 240 V_AC loads; 175 °C max T_J and -55 °C min T_J ensure operation across industrial ambient extremes.

AC/DC Switch-Mode Power Supplies

Isolated DC-DC Converters

Use Scenario: Primary-side switch in 50–200 W offline flyback or forward converters with universal AC input (85–265 V_AC).

IC Role / Device Role / Timing Role: High-side N-channel MOSFET switching element controlled by PWM controller; handles full mains-referred drain voltage and current.

Use Value: 2.5 kV_RMS isolation and 4.8 mm creepage meet reinforced insulation requirements without additional hardware; R_DS(on) = 0.27 Ω minimizes conduction loss at 7.2 A peak.

Use Scenario: Primary-side switch in 30–100 W isolated half-bridge or push-pull DC-DC modules for telecom or industrial rail systems.

IC Role / Device Role / Timing Role: High-voltage switching transistor in transformer-coupled topology; subjected to repetitive avalanche stress during dead-time transitions.

Use Value: E_AS = 170 mJ and I_AR = 7.2 A ensure robustness against transformer leakage inductance energy; TO-220 FULLPAK simplifies heatsinking in compact modules.

Motor Drive Protection Circuits

Industrial Solid-State Relays

Use Scenario: Overcurrent protection switch in 24–48 V BLDC motor gate driver stages or H-bridge fault isolation circuits.

IC Role / Device Role / Timing Role: Fast-acting series disconnect MOSFET triggered by current-sense comparator during stall or short-circuit events.

Use Value: t_on/t_off < 35 ns and dV/dt rating of 5.5 V/ns enable sub-microsecond response; logic-level gate allows direct MCU control without level-shifting.

Use Scenario: Output switching element in DIN-rail mounted SSRs replacing electromechanical relays in PLC I/O modules and HVAC controls.

IC Role / Device Role / Timing Role: Isolated high-voltage load switch with integrated heatsink interface; operates at 50/60 Hz with infrequent switching cycles.

Use Value: 100 V V_DS rating supports 240 V_AC loads; 175 °C max T_J and -55 °C min T_J ensure operation across industrial ambient extremes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP10NK100ZFP	1000 V V_DS, R_DS(on) = 0.95 Ω @ V_GS = 10 V, no isolation rating, TO-220FP package	Designed for higher-voltage PFC and ZVS topologies; lacks certified isolation and creepage	Select when higher breakdown voltage is required and external insulation can be added
IXTP10N100D2	1000 V V_DS, R_DS(on) = 1.2 Ω @ V_GS = 10 V, 2.5 kV_RMS isolation, TO-220AB package with insulated tab	Same isolation spec but higher R_DS(on) and slower switching (Q_g = 22 nC); optimized for linear-mode operation	Select when linear-mode regulation or ultra-high-voltage blocking (>500 V) is needed over efficiency

Compared with STP10NK100ZFP and IXTP10N100D2, the IRLI520G offers superior conduction efficiency (0.27 Ω vs ≥0.95 Ω), logic-level drive compatibility, and verified 2.5 kV_RMS isolation - making it optimal for cost-sensitive, space-constrained 100 V isolated switch applications requiring minimal BOM count.

Availability

IRLI520G is available at Aetrix Electronics and suitable for AC/DC power supplies, isolated DC-DC converters, and industrial solid-state relays requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from qualified manufacturing facilities.

Supply support for IRLI520G 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 MOSFETs, diodes, and optoelectronics with emphasis on high reliability, high efficiency, and application-specific ruggedization.

The IRLI520G belongs to Vishay's high-voltage isolated power MOSFET product line, engineered specifically for commercial and industrial power conversion systems where safety isolation, thermal performance, and logic-level drivability are mandatory.

FAQ

What is the maximum continuous drain current for IRLI520G at 100 °C case temperature?

The IRLI520G supports 5.1 A continuous drain current at T_C = 100 °C, derated from its 7.2 A rating at T_C = 25 °C using the linear derating factor of 0.24 W/°C. This reflects real thermal limits under sustained conduction in enclosed industrial enclosures where heatsink temperature reaches 100 °C. The IRLI520G datasheet specifies this value explicitly in Absolute Maximum Ratings.

Does IRLI520G require a gate resistor for safe switching in a 500 kHz flyback converter?

Yes - the IRLI520G benefits from an external gate resistor (typically 5–25 Ω) to dampen ringing caused by its internal L_S = 7.5 nH and L_D = 4.5 nH, especially at 500 kHz. While not strictly mandatory, a gate resistor controls dV/dt and prevents false triggering due to Miller coupling. The IRLI520G switching waveforms in Figure 10b confirm sensitivity to gate loop inductance.

Can IRLI520G be used in parallel configurations, and what design considerations apply?

Yes - the IRLI520G is explicitly designed for paralleling, as stated in its Features section. Key requirements include matched gate drive impedance, symmetrical PCB layout, Kelvin source connections, and individual gate resistors to ensure balanced current sharing. Its positive R_DS(on) temperature coefficient (shown in Fig. 4) inherently promotes thermal stability during parallel operation. The IRLI520G datasheet highlights "ease of paralleling" as a core feature.

What is the body diode forward voltage of IRLI520G at 7.2 A and 25 °C?

The body diode forward voltage (V_SD) of the IRLI520G is 2.5 V maximum at T_J = 25 °C, I_S = 7.2 A, and V_GS = 0 V, as specified in the Drain-Source Body Diode Characteristics table. This value directly impacts conduction loss during freewheeling intervals in non-synchronous topologies and must be included in thermal calculations for the IRLI520G.

Is IRLI520G RoHS-compliant and lead-free?

Yes - the ordering part number IRLI520GPbF confirms lead-free (Pb-free) compliance per RoHS Directive 2011/65/EU. The "PbF" suffix denotes lead-free termination, and Vishay documents material categorization per www.vishay.com/doc?99912. The IRLI520G is manufactured using lead-free solderable terminations and halogen-free molding compound.

IRLI520G Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 7.2A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4V, 5V

Rds On (Max) @ Id, Vgs:: 270mOhm @ 4.3A, 5V

Vgs(th) (Max) @ Id:: 2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 12 nC @ 5 V

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 490 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 37W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-3

IRLI520G FAQ

1.How can I place an order for IRLI520G through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLI520G 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 IRLI520G reliable?

The price and inventory of IRLI520G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLI520G is usually 5 days.

3.What payment methods are accepted for IRLI520G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLI520G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLI520G?

IRLI520G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLI520G 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 IRLI520G?

For technical support, including IRLI520G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLI520G requirements.

6.How does Aetrix verify that IRLI520G is sourced from the original manufacturer or authorized distributors?

All IRLI520G 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 IRLI520G meets industry standards.

7.What is the process for return or replacement of IRLI520G?

All IRLI520G units undergo pre-shipment inspection (PSI). If there is an issue with IRLI520G, 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 IRLI520G part is unused and in its original packaging.

Return procedure for IRLI520G:

1.Submit a request within 90 days.

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

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