Nexperia USA Inc. BUK964R2-55B,118

Overview

BUK964R2-55B from Nexperia is a logic-level N-channel TrenchMOS FET in D2PAK (SOT404) package, rated for 55 V V_DS, 75 A continuous drain current at T_mb = 25 °C, and 3.5 mΩ typical R_DS(on) at V_GS = 5 V and T_j = 25 °C. It is AEC-Q101 qualified and rated for 175 °C junction operation, designed for automotive 12 V/24 V load switching including motors, lamps, and solenoids.

For engineers reviewing the BUK964R2-55B datasheet, BUK964R2-55B pinout, BUK964R2-55B application, or BUK964R2-55B equivalent, this page delivers verified electrical specs, thermal performance data, mounting-base–referenced thermal resistance (0.5 K/W), avalanche energy rating (1.2 J), and real-world design context for high-reliability power switching in thermally constrained automotive environments.

Technical Context

This device uses TrenchMOS technology to achieve low on-resistance with logic-level gate drive compatibility (V_GS(th) = 1.1–2.0 V, typ. 1.5 V). Its internal structure integrates a robust body diode with 78 ns reverse recovery time and 171 nC recovered charge, enabling reliable freewheeling in inductive loads.

The SOT404 package features a large copper mounting base electrically connected to the drain, delivering 0.5 K/W junction-to-mounting-base thermal resistance. Its limiting values are defined per IEC 60134, with peak drain current up to 765 A (10 µs pulse) and unclamped avalanche ruggedness of 1.2 J under specified test conditions.

Key Specifications

Pinout & Package

Package: SOT404 (D2PAK), plastic single-ended surface-mounted package with 3 leads (one lead cropped); mounting base electrically connected to drain terminal and serves as primary thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STL220N4F7AG and IRF1404ZLPbF, the BUK964R2-55B uniquely combines 55 V rating, true logic-level drive (1.5 V V_GS(th)), AEC-Q101 qualification, and D2PAK thermal performance-making it the only option suitable for compact, high-reliability 24 V automotive switching without gate drivers or derating penalties.

Availability

BUK964R2-55B is available at Aetrix Electronics and suitable for automotive body control modules, 12 V/24 V DC motor drivers, and industrial solenoid actuators requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.

Supply support for BUK964R2-55B 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-including logic, discrete, and MOSFETs-with manufacturing rooted in process innovation and automotive-grade quality systems.

The BUK964R2-55B belongs to Nexperia's TrenchMOS logic-level power MOSFET product line, engineered specifically for automotive and industrial power switching applications demanding low R_DS(on), high temperature resilience, and AEC-Q101 compliance without gate driver overhead.

FAQ

Is BUK964R2-55B suitable for direct connection to a 3.3 V microcontroller GPIO?

Yes. With a typical gate threshold voltage of 1.5 V and guaranteed turn-on at V_GS ≥ 2.0 V, the BUK964R2-55B fully enhances using standard 3.3 V logic outputs. Its 3.5 mΩ R_DS(on) at V_GS = 5 V and 3.7 mΩ at V_GS = 4.5 V confirm strong conduction even with marginal overdrive, eliminating need for external level shifters or drivers in most implementations.

What is the maximum allowable mounting base temperature for continuous 75 A operation?

The datasheet specifies 75 A continuous drain current at T_mb = 25 °C. At higher mounting base temperatures, current must be derated per Figure 1: 75 A remains valid up to T_mb = 100 °C, beyond which thermal limits require reduction. For sustained 75 A operation, maintain T_mb ≤ 100 °C using adequate heatsinking and airflow per the normalized power dissipation curve in Figure 2.

Does the mounting base require electrical isolation from the heatsink?

Yes. The mounting base is electrically connected to the drain (pin 2), so isolation is mandatory unless the heatsink is referenced to the same potential as the drain circuit. Use thermally conductive but electrically insulating pads or washers (e.g., silicone-based isolators with ≤ 0.5 K·in²/W thermal resistance) to preserve safety and prevent short circuits in grounded-chassis systems.

How does the BUK964R2-55B handle inductive load switching without external protection?

It withstands unclamped inductive switching via its 1.2 J non-repetitive avalanche energy rating (E_AS) under defined test conditions (ID = 75 A, V_sup ≤ 55 V, R_GS = 50 Ω). This allows safe energy absorption during turn-off of motors or solenoids without external TVS diodes-provided layout minimizes stray inductance and peak V_DS stays within 55 V during avalanche events.