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

Vishay Siliconix IRF740LCL

Name: IRF740LCL
Brand: Vishay Siliconix
SKU: IRF740LCL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRF740LCL

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: TO-262-3 Long Leads, I2PAK, TO-262AA

Datasheet:: IRF740LCL.pdf

Description:: MOSFET N-CH 400V 10A I2PAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRF740LCL from Vishay Siliconix is a 400 V, 10 A N-channel power MOSFET in TO-220AB package, featuring 0.55 Ω R_DS(on) at V_GS = 10 V, 39 nC total gate charge, and repetitive avalanche rating-designed for high-frequency switch-mode power supplies, DC-DC converters, and motor control circuits.

For engineers reviewing the IRF740LCL datasheet, IRF740LCL pinout, IRF740LCL application, or IRF740LCL equivalent, key selection criteria include its 400 V V_DS, ultra-low Q_g/Q_gd ratio, enhanced ±30 V V_GS rating, and proven ruggedness in unclamped inductive switching.

Technical Context

This device employs Vishay's LCDMOS technology to achieve reduced C_iss (1100 pF), C_oss (190 pF), and C_rss (18 pF) while maintaining 400 V blocking capability and 10 A continuous drain current at T_C = 25 °C. Its low gate charge enables efficient drive with standard gate drivers.

The IRF740LCL integrates a fast-recovery body diode (t_rr = 380–570 ns, Q_rr = 2.8–4.2 μC) and supports high dV/dt operation (4.0 V/ns), making it suitable for hard-switched topologies where diode recovery stress and voltage overshoot must be minimized.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	400 V - supports primary-side switching in offline SMPS up to 265 V AC input with margin
R_DS(on)	0.55 Ω @ V_GS = 10 V - limits conduction loss to ≤3.3 W at 7.7 A RMS in 100 kHz flyback designs
Q_g	39 nC - enables full turn-on with ≤1.2 V drop across 33 Ω gate resistor at 12 V drive
t_r/t_f	31 ns / 20 ns - supports clean switching at ≥500 kHz with minimal overlap loss
E_AS	520 mJ - withstands single-pulse unclamped inductive energy without failure in motor drive H-bridge freewheeling
V_GS(th)	2.0–4.0 V - ensures reliable enhancement-mode turn-on with standard 5 V or 10 V logic-level gate drivers
T_J range	−55 to +150 °C - qualified for industrial ambient environments with derated I_D above 100 °C

Pinout & Package

TO-220AB package with isolated tab (drain-connected), standard 3-lead through-hole mounting, 1.0 °C/W junction-to-case thermal resistance, and 10 lbf·in (1.1 N·m) maximum mounting torque.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Control electrode requiring ≤±30 V drive; low Q_gs/Q_gd ratio minimizes Miller-induced shoot-through risk
D	Drain	Main high-side switching node; electrically connected to metal tab-requires isolation from heatsink unless referenced to system ground
S	Source	Power return path and gate reference; internal source inductance (L_S = 7.5 nH) impacts high-dI/dt switching stability

Key Features

Feature	Design Value
Ultra-low gate charge	39 nC total charge enables <100 ns effective switching window with 12 V/100 mA gate driver
Enhanced ±30 V V_GS rating	Supports robust gate drive in noisy industrial environments without external clamping
Repetitive avalanche rated	10 A I_AR, 13 mJ E_AR allows safe operation under transient overcurrent in motor phase-legs
Low Crss/Ciss ratio	18 pF / 1100 pF = 0.016 - reduces Miller feedback and improves dv/dt immunity during turn-off
High dV/dt immunity	4.0 V/ns peak diode recovery dV/dt rating prevents spurious turn-on in bridge configurations

Applications

AC-DC Power Supply	DC-DC Converter
Use Scenario: Primary-side switch in 65–150 W universal-input offline flyback converter. IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer via transformer primary winding. Use Value: 400 V V_DS and 520 mJ E_AS ensure reliable operation during line surges and output short-circuit events.	Use Scenario: Synchronous rectifier or high-side switch in isolated 48 V–12 V telecom DC-DC module. IC Role / Device Role / Timing Role: Fast-switching power transistor in active clamp forward or half-bridge topology. Use Value: Low Q_g (39 nC) and fast t_r/t_f (31 ns/20 ns) reduce switching losses at 300–500 kHz operation.
Motor Drive	Industrial Lighting
Use Scenario: Half-bridge leg switch in 100–500 W BLDC motor inverter for HVAC blowers. IC Role / Device Role / Timing Role: High-current, high-voltage switching element handling phase current commutation. Use Value: Repetitive avalanche rating (10 A I_AR) protects against inductive kickback during PWM dead-time transitions.	Use Scenario: Dimmable LED driver switch in constant-current buck-boost architecture for street lighting. IC Role / Device Role / Timing Role: Main power switch regulating LED string current at 100–200 kHz. Use Value: Body diode t_rr (380–570 ns) and Q_rr (2.8–4.2 μC) minimize reverse recovery loss and EMI generation.

AC-DC Power Supply

DC-DC Converter

Use Scenario: Primary-side switch in 65–150 W universal-input offline flyback converter.

IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer via transformer primary winding.

Use Value: 400 V V_DS and 520 mJ E_AS ensure reliable operation during line surges and output short-circuit events.

Use Scenario: Synchronous rectifier or high-side switch in isolated 48 V–12 V telecom DC-DC module.

IC Role / Device Role / Timing Role: Fast-switching power transistor in active clamp forward or half-bridge topology.

Use Value: Low Q_g (39 nC) and fast t_r/t_f (31 ns/20 ns) reduce switching losses at 300–500 kHz operation.

Motor Drive

Industrial Lighting

Use Scenario: Half-bridge leg switch in 100–500 W BLDC motor inverter for HVAC blowers.

IC Role / Device Role / Timing Role: High-current, high-voltage switching element handling phase current commutation.

Use Value: Repetitive avalanche rating (10 A I_AR) protects against inductive kickback during PWM dead-time transitions.

Use Scenario: Dimmable LED driver switch in constant-current buck-boost architecture for street lighting.

IC Role / Device Role / Timing Role: Main power switch regulating LED string current at 100–200 kHz.

Use Value: Body diode t_rr (380–570 ns) and Q_rr (2.8–4.2 μC) minimize reverse recovery loss and EMI generation.

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
STP4NK60ZFP	600 V V_DS, 3.8 Ω R_DS(on), higher threshold (3–5 V), no specified avalanche rating	Better voltage margin but higher conduction loss; unsuitable for high-current, low-V_DS designs	Choose STP4NK60ZFP only when >500 V blocking is required and current ≤2.5 A
FQP4N60	600 V V_DS, 3.3 Ω R_DS(on), 25 nC Q_g, lower ID (4 A), TO-220FP package	Lower thermal performance (R_thJC = 1.5 °C/W), limited to <60 W dissipation	Select FQP4N60 only for space-constrained, lower-power applications where 600 V margin outweighs efficiency loss

Compared with STP4NK60ZFP and FQP4N60, the IRF740LCL delivers superior conduction efficiency at 10 A due to its 0.55 Ω R_DS(on), supports higher repetitive stress via avalanche rating, and offers better thermal management with 1.0 °C/W R_thJC-making it optimal for 400 V-class, medium-power switching.

Availability

IRF740LCL is available at Aetrix Electronics and suitable for AC-DC power supplies, motor drives, and industrial LED lighting requiring stable component supply and long-term production continuity.

Supply support for IRF740LCL 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 IRF740LCL belongs to Vishay's LCDMOS low-charge power MOSFET family, engineered specifically for high-frequency, high-efficiency switching in offline and isolated DC-DC power conversion.

FAQ

What is the maximum continuous drain current for IRF740LCL at 100 °C case temperature?

The IRF740LCL supports 6.3 A continuous drain current at T_C = 100 °C, per its absolute maximum ratings table. This derating reflects thermal limitations of the TO-220AB package and ensures safe operation within the 150 °C maximum junction temperature limit. Designers must verify heatsink sizing using R_thJC = 1.0 °C/W and R_thCA values appropriate for their mechanical layout. The IRF740LCL maintains stable R_DS(on) performance across this range.

Does IRF740LCL have a fully rated body diode for synchronous rectification?

The IRF740LCL includes an integral body diode rated for 10 A continuous source-drain current and 32 A pulsed current, with t_rr = 380–570 ns and Q_rr = 2.8–4.2 μC at T_J = 25 °C. While not optimized as a dedicated synchronous rectifier, its diode parameters support moderate-frequency freewheeling in non-isolated buck or flyback topologies. For high-efficiency synchronous rectification, a dedicated Schottky or MOSFET with lower Q_rr is recommended-but the IRF740LCL remains viable in cost-sensitive, medium-performance designs.

Is IRF740LCL RoHS-compliant and halogen-free?

Yes-the IRF740LCL is offered in lead (Pb)-free and halogen-free versions, designated as IRF740LCPbF-BE3 per Vishay's ordering information. This variant complies with EU RoHS Directive 2011/65/EU and meets JEDEC JS709B halogen-free requirements (<900 ppm bromine, <900 ppm chlorine, total halogens <1500 ppm). Standard IRF740LCPbF is Pb-free but not halogen-free. Always verify part suffix and packaging markings to confirm compliance level for your IRF740LCL procurement.

What is the gate threshold voltage range for IRF740LCL, and how does it affect drive compatibility?

The IRF740LCL has a gate threshold voltage V_GS(th) of 2.0–4.0 V at I_D = 250 μA, confirming reliable enhancement-mode behavior. This range ensures compatibility with both 3.3 V logic (marginally, with design margin) and standard 5 V or 10 V gate drivers. However, full R_DS(on) specification (0.55 Ω) requires V_GS ≥ 10 V-so 5 V drive yields significantly higher on-resistance. The IRF740LCL is not a logic-level MOSFET; use with 10 V gate drive is strongly recommended for optimal conduction efficiency.

Can IRF740LCL be used in parallel configurations, and what layout considerations apply?

Yes, the IRF740LCL can be paralleled for higher current handling, but requires careful attention to gate loop inductance and source inductance matching. Its internal L_S = 7.5 nH and L_D = 4.5 nH must be balanced across devices using symmetrical PCB routing and Kelvin-source connections. Gate resistors should be placed close to each gate pin, and individual 10–22 Ω resistors are recommended to dampen oscillation. Thermal coupling between devices on a shared heatsink improves current sharing. The IRF740LCL's positive R_DS(on) temperature coefficient aids inherent current balancing.

IRF740LCL Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: -

Package/Case:: TO-262-3 Long Leads, I2PAK, TO-262AA

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 400 V

Current - Continuous Drain (Id) @ 25°C:: 10A (Tc)

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

Rds On (Max) @ Id, Vgs:: 550mOhm @ 6A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 39 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 1100 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: -

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: I2PAK

IRF740LCL FAQ

1.How can I place an order for IRF740LCL through Aetrix?

Please submit a Request for Quotation (RFQ) for IRF740LCL 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 IRF740LCL reliable?

The price and inventory of IRF740LCL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRF740LCL is usually 5 days.

3.What payment methods are accepted for IRF740LCL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRF740LCL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRF740LCL?

IRF740LCL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRF740LCL 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 IRF740LCL?

For technical support, including IRF740LCL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRF740LCL requirements.

6.How does Aetrix verify that IRF740LCL is sourced from the original manufacturer or authorized distributors?

All IRF740LCL 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 IRF740LCL meets industry standards.

7.What is the process for return or replacement of IRF740LCL?

All IRF740LCL units undergo pre-shipment inspection (PSI). If there is an issue with IRF740LCL, 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 IRF740LCL part is unused and in its original packaging.

Return procedure for IRF740LCL:

1.Submit a request within 90 days.

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

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