Nexperia USA Inc. BUK9M15-60EX

Overview

BUK9M15-60EX from Nexperia is an AEC-Q101-qualified N-channel logic-level MOSFET in LFPAK33 (SOT1210) package, designed for high-reliability 12 V automotive power switching. It delivers 60 V V_DS, 15 mΩ R_DS(on) at V_GS = 5 V and T_j = 25 °C, 47 A continuous drain current at T_mb = 25 °C, and operates up to 175 °C junction temperature - enabling use in transmission control, solenoid drivers, and thermally constrained engine bay modules.

For engineers reviewing the BUK9M15-60EX datasheet, BUK9M15-60EX pinout, BUK9M15-60EX application, or BUK9M15-60EX equivalent, key selection criteria include its true logic-level gate (V_GS(th) > 0.5 V at 175 °C), repetitive avalanche rating, 1.82 K/W R_th(j-mb), and LFPAK33 mounting base–drain connection for low-inductance thermal and power path design.

Technical Context

This MOSFET uses TrenchMOS technology to achieve low R_DS(on) with stable threshold voltage across temperature - V_GS(th) remains ≥0.5 V even at 175 °C, ensuring robust turn-on under hot-start conditions. Its LFPAK33 package integrates a copper mounting base directly connected to the drain, enabling efficient heat transfer to PCB copper planes or heatsinks.

The device supports unclamped inductive switching with 39 mJ non-repetitive avalanche energy (E_AS) and is rated for 188 A peak drain current (I_DM) in 10 µs pulses. Gate charge parameters - Q_G(tot) = 17 nC, Q_GD = 6.4 nC - support fast, controlled switching in 12 V automotive loads with minimal driver loss.

Key Specifications

Pinout & Package

LFPAK33 (SOT1210) is a surface-mount plastic package with an exposed copper mounting base optimized for thermal and electrical performance. The base is internally connected to the drain terminal, enabling low-inductance, high-current power routing and direct PCB thermal conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STL220N6F7 and NTMFS4C09NT1G, BUK9M15-60EX uniquely balances logic-level drivability (V_GS(th) ≥ 0.5 V at 175 °C), robust avalanche capability, and LFPAK33's superior thermal resistance - making it optimal for cost-sensitive, space-constrained automotive modules relying on direct MCU control.

Availability

BUK9M15-60EX is available at Aetrix Electronics and suitable for automotive transmission control, engine cooling fan drivers, and body control unit lamp switching requiring stable component supply across multi-year vehicle production cycles.

Supply support for BUK9M15-60EX 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 discrete and logic devices, with leadership in automotive-qualified MOSFETs and ESD protection.

BUK9M15-60EX belongs to Nexperia's Automotive Logic Level MOSFET product line, engineered specifically for 12 V automotive power distribution where AEC-Q101 compliance, thermal resilience, and direct microcontroller interface are mandatory.

FAQ

Is BUK9M15-60EX pin-compatible with other LFPAK33 MOSFETs?

Yes - BUK9M15-60EX uses the standard SOT1210 footprint with pins 1–3 as source, pin 4 as gate, and mounting base as drain. All Nexperia LFPAK33 MOSFETs share identical land pattern and thermal pad layout, enabling drop-in replacement within the same voltage/R_DS(on) class when gate drive and thermal constraints align.

What is the maximum recommended PCB copper area for the mounting base?

Nexperia recommends a minimum 200 mm² exposed copper area (≥10 mm × 20 mm) connected to the mounting base via ≥6 thermal vias (0.3 mm diameter, filled or plated) to achieve the rated 1.82 K/W R_th(j-mb). Larger copper areas further reduce thermal resistance - e.g., 400 mm² lowers R_th(j-mb) to ~1.5 K/W in typical 4-layer boards.

Does BUK9M15-60EX require a gate resistor for automotive PWM applications?

A gate resistor (typically 5–10 Ω) is recommended to dampen ringing and control dV/dt during switching - especially critical in 12 V systems with long harnesses. The datasheet specifies t_d(on) = 10.3 ns and t_f = 15.4 ns with R_G(ext) = 5 Ω; omitting it may cause EMI or shoot-through in bridge topologies.

Can BUK9M15-60EX replace TO-220 packaged MOSFETs in existing designs?

Yes, with PCB layout adaptation: the LFPAK33 footprint is smaller than TO-220 but requires thermal via placement beneath the mounting base instead of a heatsink. Electrical replacement is valid for V_DS, I_D, and R_DS(on) matching - however, gate drive timing and avalanche behavior differ, so validation of switching waveforms and thermal performance is required.