Nexperia USA Inc. BUK9240-100A,118

Overview

BUK9240-100A from Nexperia is a logic-level N-channel TrenchMOS FET in DPAK (SOT428) package, rated for 100 V V_DS, 33 A continuous drain current at T_mb = 25 °C, and 175 °C junction temperature. It delivers R_DS(on) = 34 mΩ at V_GS = 5 V and T_j = 25 °C, and is AEC-Q101 qualified for automotive power switching in 12 V/24 V systems driving motors, lamps, and solenoids.

For engineers reviewing the BUK9240-100A datasheet, BUK9240-100A pinout, BUK9240-100A application, or BUK9240-100A equivalent, this device supports thermally demanding automotive environments, requires no level-shifting gate drive, and provides verified avalanche energy rating (31 mJ) and low thermal resistance (R_th(j-mb) = 1.3 K/W).

Technical Context

This MOSFET employs TrenchMOS technology to achieve low on-resistance with logic-level gate drive compatibility (V_GS(th) = 1–2 V typ, 0.5–2.3 V over -55 to +175 °C). Its internal drain and source inductances (L_D = 2.5 nH, L_S = 7.5 nH) are optimized for fast switching in high-current DC loads.

The device features an integrated source-drain diode with V_SD = 0.85 V at I_S = 25 A and T_j = 25 °C, and exhibits robust unclamped inductive switching capability with E_AS = 31 mJ at I_D = 25 A, V_sup ≤ 100 V, and T_j(init) = 25 °C.

Key Specifications

Pinout & Package

Package: SOT428 (DPAK), plastic single-ended surface-mounted package with 3 leads (one lead cropped); mounting base (mb) electrically connected to drain 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 STL130N10F7 and IRF3205PBF, BUK9240-100A uniquely balances 100 V rating, true logic-level drive (≤2 V threshold), AEC-Q101 qualification, and 175 °C operation-making it the only drop-in solution for thermally aggressive automotive 24 V load switching without gate driver overhead.

Availability

BUK9240-100A is available at Aetrix Electronics and suitable for automotive body control modules, 12 V/24 V DC motor drives, industrial solenoid controllers, and LED lighting power stages requiring stable component supply across extended product lifecycles.

Supply support for BUK9240-100A 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, ESD protection, and logic ICs.

BUK9240-100A belongs to Nexperia's TrenchMOS logic-level power FET product line, engineered specifically for robust, low-heat, direct-MCU-controlled switching in automotive and industrial 12 V/24 V power systems.

FAQ

Is BUK9240-100A suitable for high-frequency PWM applications?

Yes - with t_r = 135 ns, t_f = 90 ns, and C_iss = 2304 pF (typ), it supports switching frequencies up to 500 kHz in buck converters and motor drives. Its low gate charge (Q_G ≈ 60 nC) reduces driver power dissipation, and internal L_S/L_D values (7.5 nH / 2.5 nH) minimize parasitic ringing in well-laid-out PCBs.

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

Per Figure 1 in the datasheet, the normalized continuous drain current drops to ~72% at T_mb = 100 °C, yielding I_D ≈ 23.8 A. This value is explicitly specified in Table 4 (Limiting Values) and reflects thermal derating due to reduced heat dissipation at elevated board temperatures.

Does the mounting base require electrical isolation from the PCB?

No - the mounting base is electrically connected to the drain terminal (Pin 2), as confirmed in Table 2 (Pinning information) and Figure 16 (package outline). It must be soldered directly to a large copper pour tied to the drain net for both thermal performance and current handling; isolation would compromise functionality and safety.

How does BUK9240-100A handle inductive load turn-off without external protection?

It withstands unclamped inductive switching events with E_AS = 31 mJ at I_D = 25 A, V_sup ≤ 100 V, and T_j(init) = 25 °C. This is validated per JEDEC JESD24-11 and enables reliable operation in solenoid and motor circuits where flyback energy is absorbed internally - eliminating need for external TVS or snubber networks in many designs.