Infineon Technologies SPI42N03S2L-13

Overview

SPI42N03S2L-13 from Infineon Technologies is an N-channel logic-level enhancement-mode power MOSFET in TO-262-3-1 package, rated for 30 V V_DS, 42 A continuous drain current at T_C = 25 °C, and 12.9 mΩ R_DS(on) at V_GS = 10 V. It features avalanche rating, 175 °C operation, and optimized gate charge × R_DS(on) figure of merit for high-efficiency DC-DC converters and motor control stages.

For engineers reviewing the SPI42N03S2L-13 datasheet, SPI42N03S2L-13 pinout, SPI42N03S2L-13 application, or SPI42N03S2L-13 equivalent, key selection criteria include its 4.5 V logic-level gate drive compatibility, 1.2–1.8 K/W junction-to-case thermal resistance, 110 mJ single-pulse avalanche energy, and TO-262-3-1 mounting configuration with exposed drain tab.

Technical Context

This OptiMOS® device uses trench-gate silicon technology to achieve low R_DS(on) while maintaining fast switching performance: t_r = 12–18 ns, t_f = 14.5–21.8 ns, and Q_g = 22.9–30.5 nC. Its gate threshold voltage (V_GS(th) = 1.2–2.0 V) ensures reliable turn-on with standard 3.3 V or 5 V logic drivers.

The MOSFET integrates a robust body diode with t_rr = 24–31 ns and Q_rr = 18–23 nC, enabling efficient synchronous rectification and freewheeling in buck converters and half-bridge inverters. Thermal design is supported by specified R_thJC and validated PCB cooling requirements (6 cm² copper area).

Key Specifications

Pinout & Package

Packaged in P-TO262-3-1 (also known as TO-262AA), this device features a 3-pin through-hole outline with isolated gate, drain-connected tab, and source terminals. The exposed metal drain pad provides low-inductance, high-current path and direct thermal coupling to heatsink or PCB copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRF7470PBF and STL110N3LLH6, SPI42N03S2L-13 delivers superior avalanche ruggedness, lower gate charge, and TO-262 mechanical robustness-making it optimal for thermally demanding, inductive-load applications requiring long-term reliability without derating.

Availability

SPI42N03S2L-13 is available at Aetrix Electronics and suitable for motor control, automotive body electronics, server power supplies, and industrial DC-DC converters requiring stable component supply and long-lifecycle support.

Supply support for SPI42N03S2L-13 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs and discrete devices.

This part belongs to the OptiMOS® 30 V product line, engineered for high-current, high-efficiency switching in automotive, computing, and industrial power systems where logic-level drive, thermal resilience, and avalanche safety are mandatory.

FAQ

Is SPI42N03S2L-13 pin-compatible with SPP42N03S2L-13 or SPB42N03S2L-13?

No. SPI42N03S2L-13 uses P-TO262-3-1 (TO-262AA), SPP42N03S2L-13 uses P-TO220-3-1, and SPB42N03S2L-13 uses P-TO263-3-2. While electrically identical, their mechanical footprints, thermal paths, and mounting methods differ significantly-requiring separate PCB layouts and heatsink interfaces.

What is the maximum recommended gate resistor for 500 kHz switching?

For 500 kHz operation with minimal overshoot, a 4.7 Ω gate resistor is recommended based on Q_g = 27 nC (typ.) and typical driver rise/fall times. This value balances switching speed against ringing and EMI, assuming a 12 V gate drive and 2 Ω driver output impedance.

Does SPI42N03S2L-13 require a gate pull-down resistor in static applications?

Yes. A 10–100 kΩ gate-to-source pull-down resistor is required to prevent unintended turn-on from floating gate voltage due to leakage, ESD, or capacitive coupling-especially critical in automotive and industrial environments where system noise is present.

Can this MOSFET replace a mechanical relay in 12 V automotive lighting circuits?

Yes. With 42 A continuous rating, 110 mJ avalanche energy, and 175 °C junction rating, SPI42N03S2L-13 supports relay replacement in headlight, fog lamp, and auxiliary lighting loads-provided proper PCB copper area (≥6 cm²) and gate drive isolation are implemented per Infineon AN2015-07.