Vishay Siliconix IRL540S

Overview

IRL540S from Vishay Siliconix is a logic-level N-channel power MOSFET in D2PAK (TO-263) package, rated for 100 V V_DS, 28 A continuous drain current at T_C = 25 °C, and 0.077 Ω R_DS(on) at V_GS = 5 V. It supports repetitive avalanche operation, features dynamic dv/dt rating up to 5.5 V/ns, and operates up to 175 °C junction temperature-ideal for high-current DC-DC converter primary-side switching and motor drive half-bridge legs.

For engineers reviewing the IRL540S datasheet, IRL540S pinout, IRL540S application, or IRL540S equivalent, key selection considerations include its logic-level gate drive compatibility with 4–5 V microcontrollers, low on-resistance at standard logic voltages, surface-mount D2PAK thermal performance, and unclamped inductive switching robustness per JEDEC JESD24-11.

Technical Context

This device belongs to Vishay's third-generation surface-mount power MOSFET family optimized for fast switching and ruggedized operation. Its design integrates a HEX-4 die in D2PAK, enabling low R_DS(on) and high pulsed current capability (I_DM = 110 A), while maintaining logic-level gate threshold (V_GS(th) = 1.0–2.0 V) and low gate charge (Q_g = 64 nC).

The IRL540S supports high di/dt (≤170 A/μs) and peak diode recovery dv/dt (5.5 V/ns), with body diode parameters including t_rr = 200–260 ns and Q_rr = 1.7–2.9 μC. Thermal resistance is specified as R_thJC = 1.0 °C/W and R_thJA = 40 °C/W on 1" FR-4 PCB-enabling high-power density designs without forced air cooling.

Key Specifications

Pinout & Package

D2PAK (TO-263) surface-mount package with exposed drain tab for thermal and electrical connection; 3-terminal configuration (G, D, S); 1.0 mm thick copper leadframe; RoHS-compliant Pb-free finish (IRL540STRLPbF variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRF540N, the IRL540S enables direct logic-level drive but trades slightly higher R_DS(on) at 10 V; versus SiHL540S-GE3, it differs only in termination chemistry-no electrical or thermal performance variation.

Availability

IRL540S is available at Aetrix Electronics and suitable for DC-DC converters, motor drives, and uninterruptible power supplies requiring stable component supply, long-term industrial lifecycle support, and surface-mount power handling up to 100 V and 28 A.

Supply support for IRL540S 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 and passive components, specializing in high-reliability power MOSFETs, diodes, and optoelectronics for industrial, automotive, and computing markets.

The IRL540S belongs to Vishay's logic-level power MOSFET product line engineered for high-current, surface-mount switching in space-constrained power conversion and motor control systems where gate drive simplicity and thermal efficiency are critical.

FAQ

What is the maximum continuous drain current for the IRL540S at 100 °C case temperature?

The IRL540S supports 20 A continuous drain current at T_C = 100 °C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limits of the D2PAK package and must be validated against actual board layout, copper area, and ambient conditions. The IRL540S maintains safe operation within its SOA curve up to this current when mounted on a 1" square FR-4 PCB with adequate copper pour.

Does the IRL540S require a gate resistor for typical 5 V microcontroller drive?

Yes-the IRL540S benefits from an external gate resistor (typically 5–25 Ω) even with 5 V MCU drive to control dV/dt, suppress ringing, and limit peak gate current during fast transitions. While the IRL540S has low Q_g (64 nC), uncontrolled gate loop inductance can cause oscillation. The recommended value balances switching speed and EMI; Vishay's fig. 10b shows test conditions using R_g = 9.0 Ω for timing characterization of the IRL540S.

Is the IRL540S suitable for avalanche energy handling in inductive load switching?

Yes-the IRL540S is explicitly rated for repetitive avalanche energy (E_AR = 15 mJ) and single-pulse avalanche energy (E_AS = 440 mJ). These ratings are validated per JEDEC JESD24-11 and apply under defined test conditions (e.g., L = 841 μH, I_AS = 28 A). The IRL540S is designed for robust unclamped inductive switching in motor drives and relay drivers where snubberless operation is required.

What is the body diode forward voltage of the IRL540S at 28 A and 25 °C?

The body diode forward voltage (V_SD) of the IRL540S is specified as 2.5 V maximum at T_J = 25 °C, I_S = 28 A, and V_GS = 0 V. This parameter directly impacts conduction loss during freewheeling intervals in buck or half-bridge topologies. The IRL540S body diode exhibits typical t_rr of 200–260 ns, making it suitable for moderate-frequency synchronous rectification where reverse recovery loss must be managed.

How does the D2PAK package of the IRL540S compare to TO-220 in thermal performance?

The D2PAK package of the IRL540S achieves R_thJC = 1.0 °C/W-comparable to TO-220 with mica insulator and thermal paste-but with superior PCB thermal coupling due to its surface-mount footprint and large copper tab. On a 1" FR-4 PCB, the IRL540S delivers R_thJA = 40 °C/W versus ~60–70 °C/W for TO-220 in similar conditions. This makes the IRL540S more effective in high-density layouts where heatsink attachment is impractical, provided the PCB has sufficient copper area for heat spreading.