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

Infineon Technologies IRLI520N

Name: IRLI520N
Brand: Infineon Technologies
SKU: IRLI520N
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLI520N

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: IRLI520N.pdf

Description:: MOSFET N-CH 100V 8.1A TO220AB FP

Quantity:: RFQ Add To RFQ list

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Inventory:3,602

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Product details

Overview

IRLI520N from Infineon Technologies (formerly International Rectifier) is a 100V, 8.1A N-channel enhancement-mode Power MOSFET in TO-220 Full-Pak package, featuring R_DS(on) = 0.18 Ω @ V_GS = 10V, logic-level gate drive (V_GS(th) = 1.0–2.0V), and fully avalanche-rated operation. It is designed for DC-DC converters, motor drives, and industrial power switching where high voltage isolation (2.5 kV_RMS) and low thermal resistance (R_θJC = 5.0 °C/W) are critical.

For engineers reviewing the IRLI520N datasheet, IRLI520N pinout, IRLI520N application, or IRLI520N equivalent, key selection factors include its isolated TO-220 Full-Pak mechanical mounting (single-screw/clip), body diode recovery performance (t_rr = 110–160 ns), and guaranteed unclamped inductive switching capability (E_AS = 85 mJ).

Technical Context

This MOSFET employs fifth-generation HEXFET process technology to achieve low on-resistance per die area while maintaining ruggedness against repetitive and single-pulse avalanche stress. Its gate threshold voltage enables direct interfacing with 3.3V/5V logic controllers without level-shifting circuitry.

The TO-220 Full-Pak package integrates electrical isolation between drain (tab) and leads via high-dielectric molding compound-equivalent to a 100 µm mica insulator-enabling direct heatsink mounting without additional hardware. Sink-to-lead creepage distance is 4.8 mm, supporting reinforced insulation in commercial-industrial systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	100 V - Maximum drain-source blocking voltage; supports 48V bus systems with 2× safety margin.
R_DS(on)	0.18 Ω @ V_GS = 10V - Enables <1.5W conduction loss at 8.1A DC, reducing heatsink requirements.
I_D (T_C = 25°C)	8.1 A - Continuous current rating at case temperature 25°C; derates linearly at 0.20 W/°C above 25°C.
E_AS	85 mJ - Single-pulse avalanche energy; ensures robustness during inductive load turn-off transients.
t_rr	110–160 ns - Body diode reverse recovery time; limits switching losses in synchronous rectification and freewheeling paths.
R_θJC	5.0 °C/W - Junction-to-case thermal resistance; allows efficient heat transfer to external heatsink with minimal thermal interface resistance.
V_GS(th)	1.0–2.0 V - Gate threshold voltage range; compatible with standard microcontroller GPIO outputs (3.3V/5V).

Pinout & Package

IRLI520N uses the TO-220 Full-Pak package: an insulated variant of TO-220AB with electrically isolated metal tab (drain), enabling direct heatsink mounting without insulating washers or pads. The package provides 2.5 kV_RMS isolation and 4.8 mm sink-to-lead creepage distance.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control electrode	Receives logic-level voltage (≥4V) to fully enhance channel; total gate charge Q_g = 20 nC dictates driver strength requirement.
D (Drain)	High-side power terminal	Connected to metal tab; electrically isolated from leads; serves as primary heat path to heatsink.
S (Source)	Power return / reference node	Common connection point for load return and gate drive reference; internal source inductance L_S = 7.5 nH affects high-speed switching ringing.

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced at V_GS ≥ 4.0V (R_DS(on) = 0.26 Ω), eliminating need for gate driver ICs in low-voltage control systems.
Fully avalanche rated	Guaranteed single-pulse E_AS = 85 mJ and repetitive E_AR = 3.0 mJ-validated under unclamped inductive test conditions per JEDEC standards.
Isolated TO-220 Full-Pak	Integrated high-isolation molding compound replaces discrete mica insulators; reduces BOM count and assembly steps in industrial power modules.
Low gate charge	Q_g = 20 nC and Q_gd = 10 nC enable fast switching (t_d(off) = 23 ns, t_f = 22 ns) with moderate gate driver current (≤2 A peak).

Applications

DC-DC Converter Primary Switch

Brushed DC Motor Driver High-Side

Use Scenario: Step-down converter in 48V industrial power supply delivering up to 6A output.

IC Role / Device Role / Timing Role: Main switching element operating at 100–500 kHz; handles full input voltage and load current.

Use Value: Low R_DS(on) minimizes conduction loss; fast switching and low Q_gd reduce transition losses; avalanche rating absorbs transformer leakage energy.

Use Scenario: H-bridge high-side switch controlling 24V brushed motor in automated valve actuator.

IC Role / Device Role / Timing Role: High-side power switch with integrated body diode freewheeling path during PWM off-time.

Use Value: Logic-level gate enables direct MCU GPIO drive; t_rr = 110–160 ns limits diode recovery loss; isolated tab simplifies heatsinking in compact enclosure.

AC-DC Auxiliary Supply Switch

Industrial PLC Output Stage

Use Scenario: Flyback primary switch in 12V/1A auxiliary power supply for control board biasing.

IC Role / Device Role / Timing Role: Discontinuous conduction mode (DCM) switch handling reflected output voltage plus clamp spikes.

Use Value: 100V V_DSS accommodates 80V reflected voltage + 20V clamp margin; E_AS = 85 mJ withstands transient overvoltage events.

Use Scenario: Solid-state relay replacement in programmable logic controller digital output module.

IC Role / Device Role / Timing Role: Load-switching element driving solenoids, indicators, or small contactors (≤5A resistive).

Use Value: TO-220 Full-Pak isolation meets IEC 61000-4-5 surge immunity requirements; lead-free construction complies with RoHS directives.

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
STP10NK100ZFP	100V, R_DS(on) = 0.32 Ω @ V_GS = 10V; Zener-protected gate; higher Q_g = 35 nC	Higher conduction loss; better gate ESD robustness; slower switching	Prefer when gate protection is prioritized over efficiency in noisy environments.
IRF540NPBF	100V, R_DS(on) = 0.044 Ω @ V_GS = 10V; non-isolated TO-220AB; V_GS(th) = 2.0–4.0V	Lower R_DS(on) but requires insulating hardware; not logic-level; no avalanche rating	Choose only if thermal budget permits lower R_DS(on) and isolation can be added externally.

Compared with STP10NK100ZFP and IRF540NPBF, IRLI520N uniquely combines logic-level drive, integrated isolation, and guaranteed avalanche capability-making it optimal for space-constrained, safety-critical industrial switching where reliability trumps marginal R_DS(on) improvement.

Availability

IRLI520N is available at Aetrix Electronics and suitable for DC-DC converters, motor drivers, and industrial PLC output stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IRLI520N 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

Infineon Technologies is a global semiconductor leader specializing in power management, automotive, and industrial control solutions, with heritage from International Rectifier's HEXFET® innovation.

The IRLI520N belongs to Infineon's legacy HEXFET Power MOSFET product line, engineered for high-reliability industrial power conversion where isolation, avalanche ruggedness, and logic-level compatibility are mandatory design requirements.

FAQ

Is the IRLI520N pin-compatible with standard TO-220AB MOSFETs?

No. While the outline matches TO-220AB, the IRLI520N uses a Full-Pak variant where the drain (tab) is electrically isolated from the leads. Pin numbering (G-D-S) is identical, but mechanical mounting differs: the tab is functional and isolated, not grounded. Standard TO-220AB parts require external insulation; IRLI520N does not.

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

The maximum continuous drain current at T_C = 100°C is 5.7 A, specified at V_GS = 10 V. This reflects thermal derating from the 8.1 A rating at 25°C, governed by the 0.20 W/°C linear derating factor and R_θJC = 5.0 °C/W junction-to-case thermal resistance.

Does the IRLI520N require a gate resistor for safe operation?

A gate resistor is recommended to dampen ringing caused by gate loop inductance and device capacitance. With Q_g = 20 nC and typical driver rise/fall times, a 10–22 Ω series resistor balances switching speed and EMI control. The datasheet specifies t_d(on), t_r, t_d(off), and t_f using R_G = 11 Ω, confirming this value as a validated design point.

Can the body diode of the IRLI520N be used for synchronous rectification?

No. The body diode has t_rr = 110–160 ns and Q_rr = 410–620 nC-too slow and lossy for efficient synchronous rectification in >100 kHz designs. It is intended for freewheeling and clamping only. For synchronous operation, an external Schottky or MOSFET-based synchronous rectifier is required.

IRLI520N Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-220-3 Full Pack

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:: 8.1A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4V, 10V

Rds On (Max) @ Id, Vgs:: 180mOhm @ 6A, 10V

Vgs(th) (Max) @ Id:: 2V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 20 nC @ 5 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 440 pF @ 25 V

FET Feature:: -

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

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-TO220-FP

IRLI520N FAQ

1.How can I place an order for IRLI520N through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLI520N 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 IRLI520N reliable?

The price and inventory of IRLI520N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLI520N is usually 5 days.

3.What payment methods are accepted for IRLI520N?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLI520N transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLI520N?

IRLI520N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLI520N 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 IRLI520N?

For technical support, including IRLI520N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLI520N requirements.

6.How does Aetrix verify that IRLI520N is sourced from the original manufacturer or authorized distributors?

All IRLI520N 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 IRLI520N meets industry standards.

7.What is the process for return or replacement of IRLI520N?

All IRLI520N units undergo pre-shipment inspection (PSI). If there is an issue with IRLI520N, 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 IRLI520N part is unused and in its original packaging.

Return procedure for IRLI520N:

1.Submit a request within 90 days.

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

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