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

Vishay Siliconix IRLR120

Name: IRLR120
Brand: Vishay Siliconix
SKU: IRLR120
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLR120

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: IRLR120.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRLR120 from Vishay Siliconix is a 100 V, 7.7 A N-channel logic-level power MOSFET in DPAK (TO-252) surface-mount package, with R_DS(on) = 0.27 Ω at V_GS = 5 V and Q_g = 12 nC, designed for DC-DC converters, motor control, and load switching where low gate drive voltage and rugged avalanche capability are required.

For engineers reviewing the IRLR120 datasheet, IRLR120 pinout, IRLR120 application, or IRLR120 equivalent, this device offers verified repetitive avalanche rating (E_AS = 210 mJ), dynamic dV/dt immunity (5.5 V/ns), and PCB-mount thermal resistance of 50 °C/W - key selection criteria for industrial power stages and automotive body electronics.

Technical Context

The IRLR120 employs third-generation TrenchFET® technology to achieve low on-resistance with logic-level gate drive compatibility (V_GS(th) = 1.0–2.0 V). Its 100 V V_DS rating and 7.7 A continuous drain current support operation in 24 V and 48 V systems under sustained thermal loads.

It features integrated body diode with t_rr = 110–140 ns and Q_rr = 0.80–1.0 μC, enabling efficient synchronous rectification and flyback recovery. The device is rated for repetitive avalanche (I_AR = 7.7 A, E_AR = 4.2 mJ) and specified for operation from –55 °C to +150 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - supports 24 V/48 V bus designs with ≥2× voltage margin against transients
R_DS(on) @ V_GS = 5 V	0.27 Ω - enables <1.1 W conduction loss at 7.7 A, reducing heatsink requirements
Q_g	12 nC - allows fast switching with moderate gate driver strength (e.g., TC4427)
I_D (continuous, T_C = 25 °C)	7.7 A - delivers full-rated current when mounted on 1" FR-4 PCB with thermal pad
E_AS	210 mJ - withstands unclamped inductive energy in motor drive or solenoid snubber circuits
dV/dt Rating	5.5 V/ns - resists false turn-on during high-speed switching in noisy environments
T_J Range	–55 °C to +150 °C - qualified for under-hood and industrial ambient conditions

Pinout & Package

DPAK (TO-252) surface-mount package with exposed drain pad for thermal and electrical connection; standard 3-pin configuration optimized for automated assembly and PCB heat spreading.

Pin/Terminal	Circuit Role	Design Meaning
G (Gate)	Control terminal	Logic-level compatible (V_GS(th) ≤ 2.0 V); requires <12 nC charge for full enhancement
D (Drain)	High-side power output	Connected to exposed copper thermal pad; electrically tied to drain for low-inductance layout
S (Source)	Power return / reference node	Provides ground reference for gate drive; source inductance LS = 7.5 nH affects switching ringing

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced at V_GS = 4.0 V (R_DS(on) = 0.38 Ω), eliminating need for level-shifting in 3.3 V/5 V microcontroller interfaces
Repetitive avalanche rated	Rated for 7.7 A repetitive avalanche current and 4.2 mJ energy - enables robust operation in inductive load switching without external clamping
Dynamic dV/dt immunity	5.5 V/ns rating prevents spurious turn-on during fast voltage transients common in half-bridge and PWM motor drives
Low Q_gd/Q_g ratio	Q_gd = 7.1 nC of total Q_g = 12 nC - improves Miller immunity and enables stable hard-switching up to ~500 kHz
RoHS-compliant & Halogen-free	Meets JEDEC JS709A halogen-free standard and EU RoHS Directive 2011/65/EU - suitable for automotive and industrial compliance programs

Applications

DC-DC Buck Converter	Brushed DC Motor Driver
Use Scenario: High-efficiency 24 V input to 5 V/3.3 V point-of-load regulation in industrial PLC modules. IC Role / Device Role / Timing Role: Synchronous rectifier switch operating at 300–500 kHz with 5 V gate drive from controller IC. Use Value: 0.27 Ω R_DS(on) minimizes conduction loss; 12 nC Q_g enables clean switching with low gate drive power.	Use Scenario: H-bridge half-bridge leg for 12–48 V brushed motor control in HVAC actuators and robotic joints. IC Role / Device Role / Timing Role: Low-side switching element controlled by microcontroller GPIO with logic-level compatibility. Use Value: Repetitive avalanche rating handles back-EMF spikes; 7.7 A continuous current supports >10 W mechanical output.
LED Constant-Current Driver	Automotive Load Switch
Use Scenario: High-brightness LED string control in commercial signage with PWM dimming and overcurrent protection. IC Role / Device Role / Timing Role: Series pass switch modulated at 1–20 kHz to regulate average LED current. Use Value: Body diode t_rr = 110 ns ensures clean reverse recovery during PWM off-time; low R_DS(on) reduces thermal derating.	Use Scenario: Smart high-side load switch for battery-powered infotainment peripherals in 12 V automotive systems. IC Role / Device Role / Timing Role: Power distribution switch with controlled inrush and fault reporting via sense resistor. Use Value: V_GS(th) = 1.0–2.0 V enables direct MCU GPIO drive; 150 °C T_J(max) supports under-dash mounting.

DC-DC Buck Converter

Brushed DC Motor Driver

Use Scenario: High-efficiency 24 V input to 5 V/3.3 V point-of-load regulation in industrial PLC modules.

IC Role / Device Role / Timing Role: Synchronous rectifier switch operating at 300–500 kHz with 5 V gate drive from controller IC.

Use Value: 0.27 Ω R_DS(on) minimizes conduction loss; 12 nC Q_g enables clean switching with low gate drive power.

Use Scenario: H-bridge half-bridge leg for 12–48 V brushed motor control in HVAC actuators and robotic joints.

IC Role / Device Role / Timing Role: Low-side switching element controlled by microcontroller GPIO with logic-level compatibility.

Use Value: Repetitive avalanche rating handles back-EMF spikes; 7.7 A continuous current supports >10 W mechanical output.

LED Constant-Current Driver

Automotive Load Switch

Use Scenario: High-brightness LED string control in commercial signage with PWM dimming and overcurrent protection.

IC Role / Device Role / Timing Role: Series pass switch modulated at 1–20 kHz to regulate average LED current.

Use Value: Body diode t_rr = 110 ns ensures clean reverse recovery during PWM off-time; low R_DS(on) reduces thermal derating.

Use Scenario: Smart high-side load switch for battery-powered infotainment peripherals in 12 V automotive systems.

IC Role / Device Role / Timing Role: Power distribution switch with controlled inrush and fault reporting via sense resistor.

Use Value: V_GS(th) = 1.0–2.0 V enables direct MCU GPIO drive; 150 °C T_J(max) supports under-dash mounting.

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
IRLR7843	V_DS = 40 V, R_DS(on) = 0.0058 Ω @ 10 V, Q_g = 42 nC - lower voltage, much lower R_DS(on), higher gate charge	Optimized for 12 V systems only; unsuitable for 24 V+ transient handling due to 40 V rating	Select IRLR7843 only when bus voltage ≤ 16 V and ultra-low conduction loss is critical; not drop-in for IRLR120's 100 V use cases
SiHLR120-GE3	Same die, identical specs, Pb-free/halogen-free construction per JEDEC JS709A - direct material-compliance variant of IRLR120	No functional difference; used where RoHS/halogen-free certification is contractually mandated	SiHLR120-GE3 is a compliant replacement for IRLR120 in new designs; both share same DPAK footprint and electrical behavior

Compared with IRLR120, the IRLR7843 trades voltage headroom for lower on-resistance in low-voltage systems, while SiHLR120-GE3 provides identical performance with certified green materials - making it the preferred choice for automotive OEM and medical BOMs requiring full substance compliance documentation.

Availability

IRLR120 is available at Aetrix Electronics and suitable for DC-DC converters, brushed motor drivers, LED drivers, and automotive load switches requiring stable component supply across industrial and transportation end markets.

Supply support for IRLR120 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 IRLR120 belongs to Vishay's third-generation TrenchFET® logic-level MOSFET family, engineered for high-current, surface-mount power switching in space-constrained industrial and automotive applications.

FAQ

What is the maximum continuous drain current for IRLR120 at 100 °C case temperature?

The IRLR120 supports 4.9 A continuous drain current at T_C = 100 °C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limits of the DPAK package when mounted on standard PCBs; actual current capability depends on heatsinking and ambient conditions. For sustained 7.7 A operation, case temperature must be maintained at or below 25 °C per the datasheet.

Does IRLR120 require a gate resistor for safe switching?

Yes - a gate resistor is recommended to control dI/dt and suppress ringing caused by the IRLR120's 7.5 nH source inductance and 4.5 nH drain inductance. Typical values range from 5 Ω to 22 Ω depending on switching frequency and driver strength; the datasheet uses R_g = 9.0 Ω in its switching time test circuit (Fig. 10b) for reproducible 9.8 ns t_d(on) and 27 ns t_f.

Can IRLR120 be used in avalanche mode repeatedly?

Yes - the IRLR120 is explicitly rated for repetitive avalanche operation with I_AR = 7.7 A and E_AR = 4.2 mJ (pulse width limited by junction temperature). This capability is validated per Figure 12 and Note "a" in the datasheet, making the IRLR120 suitable for inductive load switching without external snubbers in properly designed layouts.

What is the body diode forward voltage of IRLR120 at 7.7 A?

The body diode forward voltage (V_SD) of the IRLR120 is specified as ≤ 2.5 V at T_J = 25 °C and I_S = 7.7 A with V_GS = 0 V. This value increases with junction temperature and is critical for evaluating freewheeling losses in buck or flyback topologies where the intrinsic diode conducts during dead time.

Is IRLR120 pin-compatible with IRLU120?

No - IRLR120 uses the DPAK (TO-252) surface-mount package with gull-wing leads, while IRLU120 uses the IPAK (TO-251) through-hole package with straight leads. Although both share identical silicon die and electrical specifications, their footprints, soldering methods, and mechanical mounting differ; PCB layout and assembly process must be redesigned to substitute one for the other.

IRLR120 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tube

Product Status:: Active

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:: Surface Mount

Supplier Device Package:: DPAK

IRLR120 FAQ

1.How can I place an order for IRLR120 through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLR120 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 IRLR120 reliable?

The price and inventory of IRLR120 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLR120 is usually 5 days.

3.What payment methods are accepted for IRLR120?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLR120 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLR120?

IRLR120 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLR120 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 IRLR120?

For technical support, including IRLR120 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLR120 requirements.

6.How does Aetrix verify that IRLR120 is sourced from the original manufacturer or authorized distributors?

All IRLR120 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 IRLR120 meets industry standards.

7.What is the process for return or replacement of IRLR120?

All IRLR120 units undergo pre-shipment inspection (PSI). If there is an issue with IRLR120, 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 IRLR120 part is unused and in its original packaging.

Return procedure for IRLR120:

1.Submit a request within 90 days.

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

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