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

Vishay Siliconix IRF9540L

Name: IRF9540L
Brand: Vishay Siliconix
SKU: IRF9540L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRF9540L

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

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

Datasheet:: IRF9540L.pdf

Description:: MOSFET P-CH 100V 19A I2PAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRF9540L from Vishay Siliconix is a P-channel enhancement-mode power MOSFET in TO-220AB package, rated for -100 V V_DS, 0.20 Ω R_DS(on) at V_GS = -10 V, and -19 A continuous drain current at T_C = 25 °C. It serves as a high-side switch in DC-DC converters, motor control H-bridges, and industrial power supplies requiring rugged avalanche capability and fast switching.

For engineers reviewing the IRF9540L datasheet, IRF9540L pinout, IRF9540L application, or IRF9540L equivalent, key selection criteria include its -100 V blocking voltage, repetitive avalanche rating (E_AS = 640 mJ), low gate charge (Q_g = 61 nC), thermal robustness to +175 °C, and TO-220AB mechanical compatibility with standard heatsinks.

Technical Context

This device uses third-generation planar vertical DMOS technology optimized for low R_DS(on) and high dV/dt immunity (-5.5 V/ns peak diode recovery). Its gate threshold voltage range of -2.0 V to -4.0 V ensures reliable turn-on with standard -10 V logic-level drive while maintaining noise margin.

The integrated body diode supports synchronous rectification and freewheeling in inductive loads, with confirmed t_rr = 130–260 ns and Q_rr = 0.35–0.70 μC at I_F = -19 A and dI/dt = 100 A/μs - critical for minimizing switching losses in hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	-100 V - supports high-voltage DC bus isolation in industrial 48 V and 100 V systems
R_DS(on) @ V_GS = -10 V	0.20 Ω - enables ≤ 4.3 W conduction loss at -19 A, reducing heatsink requirements
Q_g	61 nC - determines gate driver power demand; compatible with common -10 V MOSFET drivers
E_AS	640 mJ - allows unclamped inductive switching without snubbers in relay/motor drive circuits
T_J max	+175 °C - permits operation in sealed enclosures or high-ambient environments without derating
dV/dt rating	-5.5 V/ns - suppresses false turn-on during fast transient events in noisy power stages

Pinout & Package

IRF9540L uses the industry-standard TO-220AB package with isolated tab (drain-connected), enabling direct mounting to heatsinks without insulating hardware. The package features 3 leads: Gate (G), Drain (D), Source (S), arranged left-to-right as G-D-S when viewed with leads down and marking side facing outward.

Pin/Terminal	Circuit Role	Design Meaning
G	Gate	Controls channel conduction; requires -10 V for full enhancement; input capacitance C_iss = 1400 pF
D	Drain	Main high-side power terminal; electrically connected to metal tab; must be insulated if heatsink is grounded
S	Source	Reference node for gate drive; carries full load current; body diode anode is internally tied to S

Key Features

Feature	Design Value
Repetitive avalanche rated	Rated for unlimited repetitive E_AR = 15 mJ events at I_AR = -19 A - eliminates need for external clamping in overcurrent fault conditions
Dynamic dV/dt immunity	Guaranteed -5.5 V/ns - prevents spurious turn-on during high-slew-rate transients in motor drives and SMPS
Low R_DS(on) × Q_g figure-of-merit	12.2 Ω·nC - balances conduction and switching losses for optimal efficiency in 20–100 kHz power stages
TO-220AB thermal resistance	R_thJC = 1.0 °C/W - enables 150 W dissipation with modest heatsinking (e.g., 1.5 °C/W sink + interface)

Applications

Industrial Motor Control	DC-DC Converter High-Side Switch
Use Scenario: Bidirectional H-bridge driving 24–48 V brushed DC motors in PLC-controlled automation systems. IC Role / Device Role / Timing Role: P-channel high-side switch providing reverse polarity protection and regenerative braking via body diode conduction. Use Value: Ruggedized avalanche rating absorbs inductive kickback during rapid direction reversal without external TVS.	Use Scenario: Non-isolated buck converter supplying 12 V/5 A from a 48 V battery bus in telecom power shelves. IC Role / Device Role / Timing Role: Synchronous high-side switch operating at 100 kHz with gate drive referenced to output rail. Use Value: Low Q_g (61 nC) and fast switching (t_r = 73 ns) reduce driver losses and improve light-load efficiency.
Uninterruptible Power Supply (UPS)	Power OR-ing Circuit
Use Scenario: Line-powered UPS with battery backup, where IRF9540L controls AC-DC rectified bus connection to inverter stage. IC Role / Device Role / Timing Role: High-voltage P-channel switch isolating main and backup power paths during transfer events. Use Value: -100 V V_DS withstands 1.5× nominal bus voltage; 175 °C rating ensures reliability under sustained overload.	Use Scenario: Dual-input 24 V power system combining primary and redundant supplies in industrial controllers. IC Role / Device Role / Timing Role: Ideal diode replacement using P-channel MOSFET configured as active OR-ing element. Use Value: Body diode forward drop (V_SD = -5.0 V) is actively reduced by gate control, cutting conduction loss vs. Schottky solutions.

Industrial Motor Control

DC-DC Converter High-Side Switch

Use Scenario: Bidirectional H-bridge driving 24–48 V brushed DC motors in PLC-controlled automation systems.

IC Role / Device Role / Timing Role: P-channel high-side switch providing reverse polarity protection and regenerative braking via body diode conduction.

Use Value: Ruggedized avalanche rating absorbs inductive kickback during rapid direction reversal without external TVS.

Use Scenario: Non-isolated buck converter supplying 12 V/5 A from a 48 V battery bus in telecom power shelves.

IC Role / Device Role / Timing Role: Synchronous high-side switch operating at 100 kHz with gate drive referenced to output rail.

Use Value: Low Q_g (61 nC) and fast switching (t_r = 73 ns) reduce driver losses and improve light-load efficiency.

Uninterruptible Power Supply (UPS)

Power OR-ing Circuit

Use Scenario: Line-powered UPS with battery backup, where IRF9540L controls AC-DC rectified bus connection to inverter stage.

IC Role / Device Role / Timing Role: High-voltage P-channel switch isolating main and backup power paths during transfer events.

Use Value: -100 V V_DS withstands 1.5× nominal bus voltage; 175 °C rating ensures reliability under sustained overload.

Use Scenario: Dual-input 24 V power system combining primary and redundant supplies in industrial controllers.

IC Role / Device Role / Timing Role: Ideal diode replacement using P-channel MOSFET configured as active OR-ing element.

Use Value: Body diode forward drop (V_SD = -5.0 V) is actively reduced by gate control, cutting conduction loss vs. Schottky solutions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP9PF10	V_DS = -100 V, R_DS(on) = 0.22 Ω, Q_g = 52 nC, TO-220FP (full-pack) package	Lower gate charge but higher R_DS(on); smaller package limits thermal performance to 90 W PD	Prefer STP9PF10 only when board space is constrained and peak power < 90 W
IXTP10P10P	V_DS = -100 V, R_DS(on) = 0.18 Ω, Q_g = 72 nC, TO-220AB package, enhanced avalanche rating (E_AS = 1000 mJ)	Lower on-resistance but higher gate charge; superior avalanche energy supports more aggressive fault handling	Select IXTP10P10P when E_AS > 640 mJ is required for mission-critical inductive loads

Compared with IRF9540L, STP9PF10 trades thermal headroom for compactness, while IXTP10P10P improves ruggedness at the cost of increased gate drive power - both require verification of PCB layout compatibility due to differing thermal pad geometries and leadframe stiffness.

Availability

IRF9540L is available at Aetrix Electronics and suitable for industrial motor control, DC-DC converter high-side switching, and uninterruptible power supply (UPS) designs requiring stable component supply across multi-year production cycles.

Supply support for IRF9540L 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 demanding power and signal applications.

The IRF9540L belongs to Vishay's third-generation power MOSFET family engineered for rugged industrial switching - emphasizing avalanche survivability, thermal stability, and ease of paralleling in high-current systems.

FAQ

What is the maximum continuous drain current rating for the IRF9540L at 100 °C case temperature?

The IRF9540L supports -13 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, where junction-to-case resistance (R_thJC = 1.0 °C/W) and ambient conditions determine actual usable current. Designers must verify heatsink performance to sustain this rating in real-world layouts.

Does the IRF9540L have a specified body diode reverse recovery time (t_rr)?

Yes, the IRF9540L specifies t_rr = 130–260 ns under test conditions of T_J = 25 °C, I_F = -19 A, and dI/dt = 100 A/μs. This parameter is critical for estimating switching losses in freewheeling paths and must be used with Q_rr = 0.35–0.70 μC to model diode turn-off behavior accurately in SPICE simulations.

Is the IRF9540L RoHS-compliant, and what are its lead-free ordering options?

The IRF9540L is available in RoHS-compliant versions: IRF9540PbF (lead-free) and IRF9540PbF-BE3 (lead-free and halogen-free). These variants maintain identical electrical specifications and TO-220AB mechanical form factor. The base IRF9540 part may contain leaded terminations and is not RoHS-compliant unless explicitly ordered as PbF or BE3.

Can the IRF9540L be paralleled with identical units for higher current capacity?

Yes, the IRF9540L is explicitly designed for easy paralleling, as noted in its Features list. Its positive temperature coefficient for R_DS(on) ensures current sharing stability across devices. Successful implementation requires matched gate drive impedance, symmetrical PCB layout, and shared heatsinking to minimize thermal imbalance between paralleled IRF9540L units.

What is the gate-source threshold voltage (V_GS(th)) range for the IRF9540L, and how does it affect drive design?

The IRF9540L has a V_GS(th) range of -2.0 V to -4.0 V at I_D = -250 μA. This means reliable turn-on requires V_GS ≤ -4.0 V, while logic-level compatibility demands careful gate driver selection - standard -10 V supplies ensure full enhancement, whereas -5 V drives may yield marginal R_DS(on) and higher conduction loss.

IRF9540L 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:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 19A (Tc)

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

Rds On (Max) @ Id, Vgs:: 200mOhm @ 11A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 61 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1400 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: -

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: I2PAK

IRF9540L FAQ

1.How can I place an order for IRF9540L through Aetrix?

Please submit a Request for Quotation (RFQ) for IRF9540L 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 IRF9540L reliable?

The price and inventory of IRF9540L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRF9540L is usually 5 days.

3.What payment methods are accepted for IRF9540L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRF9540L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRF9540L?

IRF9540L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRF9540L 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 IRF9540L?

For technical support, including IRF9540L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRF9540L requirements.

6.How does Aetrix verify that IRF9540L is sourced from the original manufacturer or authorized distributors?

All IRF9540L 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 IRF9540L meets industry standards.

7.What is the process for return or replacement of IRF9540L?

All IRF9540L units undergo pre-shipment inspection (PSI). If there is an issue with IRF9540L, 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 IRF9540L part is unused and in its original packaging.

Return procedure for IRF9540L:

1.Submit a request within 90 days.

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

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