Nexperia USA Inc. BUK7M11-40HX

Overview

BUK7M11-40HX from Nexperia is an AEC-Q101 qualified N-channel standard-level MOSFET in LFPAK33 (SOT1210) package, using Trench 9 superjunction technology. It delivers 40 V V_DS, 11.0 mΩ R_DS(on) at V_GS = 10 V and T_j = 25 °C, 35 A continuous drain current at T_mb = 25 °C, and repetitive avalanche rating - designed for 12 V automotive powertrain, body control, and LED lighting systems.

For engineers reviewing the BUK7M11-40HX datasheet, BUK7M11-40HX pinout, BUK7M11-40HX application, or BUK7M11-40HX equivalent, key selection criteria include its 2.79 K/W junction-to-mounting-base thermal resistance, gull-wing lead geometry for AOI compatibility, softness factor of 0.59 for controlled diode recovery, and LFPAK33 footprint with drain-connected mounting base.

Technical Context

This MOSFET employs Trench 9 silicon architecture to achieve low conduction loss and high power density while maintaining robust switching behavior. Its LFPAK33 copper-clip construction enables low-inductance source connection and superior thermal transfer via the exposed drain-mounted base.

The device features a gate threshold voltage of 2.4–3.6 V at 25 °C, 11.2–16 nC total gate charge, and 2–4 nC gate-drain charge - enabling fast, controllable turn-on/turn-off in 12 V automotive DC-DC and motor drive stages. Its source-drain diode exhibits 13 nC recovered charge and 20 ns reverse recovery time under defined test conditions.

Key Specifications

Pinout & Package

BUK7M11-40HX uses the LFPAK33 (SOT1210) surface-mount package: 8-lead gull-wing configuration with an exposed copper mounting base electrically connected to the drain terminal. The package measures 3.20 mm × 2.45 mm × 0.90 mm and features optimized solder land pattern per Figure 18 of the datasheet for reflow reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STL220N4F7AG and NTMFS4C09NT1G, BUK7M11-40HX offers optimal balance of low thermal resistance, moderate gate charge, and compact LFPAK33 footprint - making it preferred for space-constrained, thermally demanding automotive modules where both conduction and switching losses must be minimized.

Availability

BUK7M11-40HX is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics, and LED lighting systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for BUK7M11-40HX 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 essential semiconductors for automotive, industrial, and consumer applications - delivering high-reliability discrete and logic devices with rigorous qualification standards.

BUK7M11-40HX belongs to Nexperia's LFPAK automotive MOSFET product line, engineered specifically for high-current, high-temperature 12 V vehicle networks where robustness, thermal performance, and AEC-Q101 compliance are non-negotiable.

FAQ

Is BUK7M11-40HX pin-compatible with standard SO-8 or TO-252 MOSFETs?

No. BUK7M11-40HX uses the LFPAK33 (SOT1210) package with 8 gull-wing leads and an exposed drain mounting base - incompatible with SO-8 or TO-252 footprints. Its pin 1–3 are all source, pin 4 is gate, and the mounting base is drain. PCB layout must follow Nexperia's recommended land pattern in Figure 18.

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

Per Figure 2 of the datasheet, the continuous drain current is 34 A at T_mb = 100 °C and V_GS = 10 V. This reflects thermal derating due to reduced heat dissipation capacity; actual usable current depends on PCB copper area, airflow, and ambient temperature.

Does BUK7M11-40HX require a gate resistor for driving with a 3.3 V microcontroller?

No external gate resistor is required for basic turn-on, as V_GS(th) is 2.4–3.6 V and the device conducts fully at V_GS ≥ 4.5 V. However, a small series resistor (5–10 Ω) is recommended to dampen ringing and control dV/dt during fast switching in high-noise automotive environments.

Can BUK7M11-40HX replace BUK7M12-40H in existing designs?

Yes, with verification: both share identical LFPAK33 package, 40 V rating, and AEC-Q101 qualification. BUK7M11-40HX has lower R_DS(on) (11.0 mΩ vs. 12.0 mΩ) and slightly higher Q_G (11.2–16 nC vs. 10.5–15 nC), offering improved conduction loss but marginally increased gate drive demand.