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

Vishay Siliconix IRLU120PBF

Name: IRLU120PBF
Brand: Vishay Siliconix
SKU: IRLU120PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLU120PBF

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: IRLU120PBF.pdf

Description:: MOSFET N-CH 100V 7.7A TO251AA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRLU120PBF from Vishay Siliconix is a 100 V, 7.7 A N-channel logic-level power MOSFET in IPAK (TO-251) through-hole package, with R_DS(on) = 0.27 Ω at V_GS = 5 V, Q_g = 12 nC, and repetitive avalanche rated for robust switching in DC-DC converters and motor control circuits.

For engineers reviewing the IRLU120PBF datasheet, IRLU120PBF pinout, IRLU120PBF application, or IRLU120PBF equivalent, key selection criteria include its logic-level gate drive compatibility (V_GS(th) = 1.0–2.0 V), 100 V V_DS rating, 42 W T_C power dissipation, and TO-251 thermal performance under PCB-mount conditions.

Technical Context

This device belongs to Vishay's third-generation TrenchFET® power MOSFET family, optimized for fast switching and ruggedized operation in hard-switched topologies. Its dynamic dV/dt rating of 5.5 V/ns and unclamped inductive switching capability (E_AS = 210 mJ) support reliable operation in flyback and buck converters without external snubbers.

The IRLU120PBF integrates a low-loss body diode with t_rr = 110–140 ns and Q_rr = 0.80–1.0 μC, enabling efficient synchronous rectification and freewheeling in half-bridge configurations. Its gate charge profile (Q_gs = 3.0 nC, Q_gd = 7.1 nC) supports clean turn-on/turn-off transitions with minimal Miller-induced shoot-through risk.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - Supports input rails up to 80 V DC with margin for voltage transients in industrial power supplies.
R_DS(on) @ V_GS = 5 V	0.27 Ω - Enables ≤1.5 W conduction loss at 7.7 A continuous drain current under heatsinked conditions.
Q_g	12 nC - Determines gate driver current requirement (~1.2 mA average at 100 kHz switching) for efficient high-frequency operation.
I_D (T_C = 25 °C)	7.7 A - Maximum continuous current achievable with case temperature maintained at 25 °C using adequate copper area.
E_AS	210 mJ - Withstands single-pulse inductive energy events without failure, critical for relay driving and solenoid control.
t_r/t_f	64 ns / 27 ns - Fast edge rates reduce switching losses in 100–500 kHz SMPS designs while limiting EMI generation.
V_GS(th)	1.0–2.0 V - Fully enhances with standard 3.3 V or 5 V logic outputs, eliminating need for gate boosters in microcontroller-driven systems.

Pinout & Package

IRLU120PBF uses the IPAK (TO-251) through-hole package with three terminals: Gate (G), Drain (D), and Source (S). The package features a thermally enhanced leadframe with exposed drain pad for improved heat transfer to PCB copper.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Controls channel conduction; requires <100 nA leakage current and interfaces directly with 3.3 V/5 V logic drivers.
D	Drain	High-side power node; electrically connected to exposed metal tab for thermal and electrical grounding in PCB layout.
S	Source	Reference node for gate drive and current sensing; ties to power ground plane with low-inductance routing.

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced from 4 V gate voltage, enabling direct interface with MCU GPIOs and low-voltage PWM controllers.
Repetitive avalanche rated	Withstands 7.7 A repetitive avalanche current (I_AR) and 4.2 mJ energy per pulse, supporting reliable operation in inductive load switching.
Dynamic dV/dt immunity	Rated for 5.5 V/ns, reducing risk of false turn-on during high-slew-rate voltage transients in noisy industrial environments.
Low Q_gd/Q_g ratio	Q_gd = 7.1 nC of total 12 nC gate charge minimizes Miller plateau duration, improving controllability in high-speed switching.
RoHS-compliant & halogen-free	Meets JEDEC JS709A halogen-free standard and EU Directive 2011/65/EU, supporting environmentally regulated industrial and automotive programs.

Applications

DC-DC Buck Converter	Brushed DC Motor Driver
Use Scenario: Step-down regulator supplying 5 V/3 A to embedded control circuitry from a 24 V battery bus. IC Role / Device Role / Timing Role: High-side synchronous switch operating at 250 kHz with 3.3 V gate drive from a PWM controller. Use Value: 0.27 Ω R_DS(on) limits conduction loss to <2.1 W at full load, while 12 nC Q_g enables efficient gate drive with minimal driver overhead.	Use Scenario: H-bridge half-leg controlling bidirectional 12 V, 5 A brushed motor in HVAC actuator. IC Role / Device Role / Timing Role: Low-side switch handling continuous 5 A and pulsed 31 A surge currents during stall conditions. Use Value: Repetitive avalanche rating (I_AR = 7.7 A) and 210 mJ E_AS prevent failure during motor commutation spikes and inductive kickback.
LED Constant-Current Driver	Industrial Relay/Solenoid Interface
Use Scenario: Constant-current dimmable LED string driver delivering 700 mA at 36 V output from 48 V input. IC Role / Device Role / Timing Role: Primary switching element in buck topology, modulated via analog/PWM dimming signal. Use Value: Logic-level V_GS(th) ensures full enhancement at 3.3 V control voltage, eliminating level-shifting components and reducing BOM count.	Use Scenario: Solid-state replacement for electromechanical relay driving 24 V, 2 A solenoid valve in PLC I/O module. IC Role / Device Role / Timing Role: Single-pole, single-throw (SPST) electronic switch activated by 5 V microcontroller output. Use Value: 100 V V_DS rating provides 2× safety margin over 24 V system rail, and body diode recovery (t_rr = 110 ns) suppresses voltage overshoot during turn-off.

DC-DC Buck Converter

Brushed DC Motor Driver

Use Scenario: Step-down regulator supplying 5 V/3 A to embedded control circuitry from a 24 V battery bus.

IC Role / Device Role / Timing Role: High-side synchronous switch operating at 250 kHz with 3.3 V gate drive from a PWM controller.

Use Value: 0.27 Ω R_DS(on) limits conduction loss to <2.1 W at full load, while 12 nC Q_g enables efficient gate drive with minimal driver overhead.

Use Scenario: H-bridge half-leg controlling bidirectional 12 V, 5 A brushed motor in HVAC actuator.

IC Role / Device Role / Timing Role: Low-side switch handling continuous 5 A and pulsed 31 A surge currents during stall conditions.

Use Value: Repetitive avalanche rating (I_AR = 7.7 A) and 210 mJ E_AS prevent failure during motor commutation spikes and inductive kickback.

LED Constant-Current Driver

Industrial Relay/Solenoid Interface

Use Scenario: Constant-current dimmable LED string driver delivering 700 mA at 36 V output from 48 V input.

IC Role / Device Role / Timing Role: Primary switching element in buck topology, modulated via analog/PWM dimming signal.

Use Value: Logic-level V_GS(th) ensures full enhancement at 3.3 V control voltage, eliminating level-shifting components and reducing BOM count.

Use Scenario: Solid-state replacement for electromechanical relay driving 24 V, 2 A solenoid valve in PLC I/O module.

IC Role / Device Role / Timing Role: Single-pole, single-throw (SPST) electronic switch activated by 5 V microcontroller output.

Use Value: 100 V V_DS rating provides 2× safety margin over 24 V system rail, and body diode recovery (t_rr = 110 ns) suppresses voltage overshoot during turn-off.

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
IRLR120PBF	Same die, DPAK (TO-252) surface-mount package; R_thJA = 50 °C/W (PCB mount) vs. IRLU120PBF's 110 °C/W.	Requires reflow-compatible layout; better thermal performance on 1"² FR-4 but incompatible with through-hole assembly.	Select IRLR120PBF for automated SMT production; choose IRLU120PBF when manual assembly, repairability, or mechanical robustness is prioritized.
STP12NK100Z	1000 V V_DS, higher R_DS(on) (0.75 Ω), Zener-protected gate, no logic-level drive (V_GS(th) = 3–5 V).	Targeted at high-voltage AC-DC PFC stages, not low-voltage DC-DC or motor control.	Not interchangeable: STP12NK100Z requires gate driver boost and offers no advantage in 24–48 V systems where IRLU120PBF's logic-level drive and low R_DS(on) are essential.

Compared with IRLR120PBF and STP12NK100Z, the IRLU120PBF uniquely balances through-hole manufacturability, logic-level gate compatibility, and 100 V/7.7 A capability-making it optimal for cost-sensitive, medium-power industrial controls where SMT infrastructure is unavailable or reliability under vibration is critical.

Availability

IRLU120PBF is available at Aetrix Electronics and suitable for DC-DC converters, brushed motor drivers, LED drivers, and industrial relay interfaces requiring stable component supply across extended production lifecycles.

Supply support for IRLU120PBF 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 power MOSFETs, diodes, and optoelectronics with emphasis on ruggedness, efficiency, and reliability.

The IRLU120PBF belongs to Vishay's TrenchFET® logic-level power MOSFET product line, engineered for high-efficiency switching in space-constrained, low-voltage industrial and consumer power systems.

FAQ

What is the maximum continuous drain current for IRLU120PBF at 100 °C case temperature?

The IRLU120PBF supports 4.9 A continuous drain current at T_C = 100 °C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limitations of the TO-251 package under sustained high-temperature operation and must be validated against actual PCB copper area and ambient conditions in the final design. The IRLU120PBF's 0.27 Ω R_DS(on) contributes to predictable conduction loss across this range.

Does IRLU120PBF require a gate resistor for safe operation?

A gate resistor is recommended for IRLU120PBF to control dI/dt and suppress ringing, especially in high-frequency switching applications. While not strictly mandatory for basic on/off use, a 10–25 Ω resistor limits peak gate current, dampens parasitic oscillations, and improves EMI performance. The IRLU120PBF's Q_g = 12 nC and logic-level threshold make it compatible with standard 3.3 V/5 V drivers when paired with appropriate gate resistance.

Can IRLU120PBF be used in avalanche mode repeatedly?

Yes, the IRLU120PBF is explicitly rated for repetitive avalanche operation with I_AR = 7.7 A and E_AR = 4.2 mJ per pulse, provided pulse width and duty cycle remain within limits defined by junction temperature rise. This capability is validated per Figure 11 and 12 in the datasheet and makes the IRLU120PBF suitable for inductive load switching without external clamping diodes. Always verify thermal design margins when using IRLU120PBF in repetitive avalanche.

What is the body diode forward voltage of IRLU120PBF at 7.7 A and 25 °C?

The body diode forward voltage (V_SD) of IRLU120PBF is specified as 2.5 V maximum at I_S = 7.7 A and T_J = 25 °C. This parameter defines conduction loss during freewheeling intervals in buck or half-bridge topologies. The IRLU120PBF's body diode exhibits t_rr = 110–140 ns and Q_rr = 0.80–1.0 μC, supporting moderate-frequency operation with manageable reverse recovery loss.

Is IRLU120PBF RoHS-compliant and halogen-free?

Yes, IRLU120PBF is both RoHS-compliant per EU Directive 2011/65/EU and halogen-free per JEDEC JS709A standards, as confirmed in Vishay's material categorization documentation (www.vishay.com/doc?99912). The "PBF" suffix denotes lead (Pb)-free and halogen-free construction, making IRLU120PBF suitable for environmentally regulated industrial, medical, and consumer applications requiring strict chemical compliance.

IRLU120PBF Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

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:: 7.7A (Tc)

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

Rds On (Max) @ Id, Vgs:: 270mOhm @ 4.6A, 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):: 2.5W (Ta), 42W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-251AA

IRLU120PBF FAQ

1.How can I place an order for IRLU120PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLU120PBF 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 IRLU120PBF reliable?

The price and inventory of IRLU120PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLU120PBF is usually 5 days.

3.What payment methods are accepted for IRLU120PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLU120PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLU120PBF?

IRLU120PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLU120PBF 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 IRLU120PBF?

For technical support, including IRLU120PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLU120PBF requirements.

6.How does Aetrix verify that IRLU120PBF is sourced from the original manufacturer or authorized distributors?

All IRLU120PBF 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 IRLU120PBF meets industry standards.

7.What is the process for return or replacement of IRLU120PBF?

All IRLU120PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRLU120PBF, 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 IRLU120PBF part is unused and in its original packaging.

Return procedure for IRLU120PBF:

1.Submit a request within 90 days.

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

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