Nexperia USA Inc. BUK7M10-40EX

Overview

BUK7M10-40EX from Nexperia is an AEC-Q101 qualified N-channel standard-level MOSFET in LFPAK33 (SOT1210) package, designed for automotive power switching. It delivers 40 V V_DS, 10 mΩ R_DS(on) at V_GS = 10 V and T_j = 25 °C, 56 A continuous drain current at T_mb = 25 °C, and operates up to 175 °C junction temperature - enabling robust control of motors, lamps, and solenoids in 12 V automotive systems.

For engineers reviewing the BUK7M10-40EX datasheet, BUK7M10-40EX pinout, BUK7M10-40EX application, or BUK7M10-40EX equivalent, key selection criteria include its standard-level gate drive compatibility (V_GS(th) > 1 V at 175 °C), repetitive avalanche rating, and thermal performance with R_th(j-mb) = 2.01 K/W - critical for thermally constrained engine bay and transmission control designs.

Technical Context

This MOSFET uses TrenchMOS technology and features a true standard-level gate architecture, ensuring reliable turn-on with 10 V logic-compatible drive while maintaining V_GS(th) ≥ 1 V even at 175 °C. Its LFPAK33 package integrates the mounting base directly to the drain, enabling low-inductance, high-current PCB routing and efficient heat transfer to the heatsink.

The device supports unclamped inductive switching with 30.6 mJ non-repetitive avalanche energy (ID = 56 A, V_sup ≤ 40 V), and exhibits fast switching dynamics: t_d(on) = 5.7 ns, t_r = 8.7 ns, Q_GD = 6.7 nC - optimized for high-frequency, high-efficiency power conversion in automotive subsystems.

Key Specifications

Pinout & Package

LFPAK33 (SOT1210) is a surface-mount, single-ended power package with integrated mounting base (drain-connected) and three parallel source terminals for low-inductance, high-current PCB layout. The package measures 3.20 × 2.45 mm with 0.65 mm height and exposes the drain on the bottom for optimal thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STL220N4F7AG and NTMFS4C09NT1G, BUK7M10-40EX uniquely combines AEC-Q101 qualification, true standard-level gate (V_GS(th) ≥ 1 V at 175 °C), and LFPAK33's superior thermal performance - making it the preferred choice for production automotive modules demanding both reliability and simplified drive architecture.

Availability

BUK7M10-40EX is available at Aetrix Electronics and suitable for automotive body control modules, transmission control units, and engine management systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for Tier-1 OEM programs.

Supply support for BUK7M10-40EX 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability essential semiconductors - delivering discrete, logic, and MOSFET solutions for automotive, industrial, and computing markets.

BUK7M10-40EX belongs to Nexperia's Automotive Qualified Logic and Power portfolio, engineered specifically for robust, thermally efficient power switching in harsh automotive environments - emphasizing AEC-Q101 compliance, avalanche ruggedness, and LFPAK packaging advantages.

FAQ

Is BUK7M10-40EX pin-compatible with other LFPAK33 MOSFETs?

Yes - BUK7M10-40EX uses the standardized SOT1210 footprint with identical 3.20 × 2.45 mm outline, 0.65 mm height, and pin 1–4 layout. All LFPAK33 devices share the same source-gate-drain-terminal mapping and mounting base configuration, enabling drop-in replacement within the same package family when electrical parameters align.

What is the maximum continuous drain current at 100 °C mounting base temperature?

Per Figure 2 in the datasheet, the continuous drain current is 39.6 A at T_mb = 100 °C and V_GS ≥ 10 V. This derating reflects thermal limits imposed by the 2.01 K/W junction-to-mounting-base resistance and 175 °C maximum junction temperature - not package current-carrying capacity alone.

Does BUK7M10-40EX require a gate resistor for automotive PWM applications?

A gate resistor is recommended to control dV/dt and prevent parasitic oscillation, especially at high switching frequencies (>10 kHz). Typical values range from 2.2 Ω to 10 Ω depending on driver strength and layout inductance. The low Q_GD (6.7 nC) enables fast, controlled transitions without excessive ringing when properly terminated.

Can BUK7M10-40EX be used in high-side switching configurations?

Yes - its standard-level gate enables high-side use with appropriate level-shifted gate drive (e.g., bootstrap or isolated driver). However, the mounting base is internally connected to drain, so the PCB heatsink must be electrically isolated if the drain node is not at ground potential - a key layout consideration for high-side implementation.