Nexperia USA Inc. BUK7520-100A,127

Overview

BUK7520-100A from NXP Semiconductors is a standard-level N-channel TrenchMOS FET in TO-220AB (SOT78A) package, designed for automotive-critical power switching. It delivers 100 V drain-source voltage rating, 63 A continuous drain current at 25 °C mounting base temperature, and 50 mΩ R_DS(on) at 175 °C junction temperature-enabling robust 12 V/24 V load control in thermally demanding environments.

For engineers reviewing the BUK7520-100A datasheet, BUK7520-100A pinout, BUK7520-100A application, or BUK7520-100A equivalent, key selection criteria include AEC-Q101 qualification, 175 °C maximum junction temperature, gate compatibility with standard 10 V drive, and avalanche energy rating of 400 mJ for unclamped inductive switching reliability.

Technical Context

This device implements a trench-gate MOSFET structure optimized for low conduction loss and high thermal resilience. Its gate threshold voltage ranges from 1 V at 175 °C to 4.4 V at –55 °C, ensuring stable turn-on behavior across automotive temperature extremes. The integrated source-drain diode supports freewheeling in inductive loads with 0.85 V forward voltage at 25 A and 76 ns reverse recovery time.

Thermal design is enabled by a 0.75 K/W junction-to-mounting-base resistance, allowing direct heatsink mounting via the drain-connected metal tab. Dynamic performance includes 3430 pF input capacitance and 21 ns turn-on delay under 10 V gate drive with 10 Ω external resistor-supporting efficient PWM operation up to several hundred kHz.

Key Specifications

Pinout & Package

Package: TO-220AB (SOT78A), plastic single-ended package with heatsink-mounted metal tab (drain-connected), 3 leads, and one mounting hole. Mounting base serves as thermal path and electrical connection to drain.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP110N10F7 and IRF540NPBF, the BUK7520-100A uniquely combines AEC-Q101 qualification, 400 mJ avalanche ruggedness, and guaranteed 50 mΩ R_DS(on) at 175 °C-making it the only option qualified for thermally aggressive automotive power switching where reliability under transient stress is mandatory.

Availability

BUK7520-100A is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, commercial vehicle lighting systems, and off-highway equipment solenoid control requiring stable component supply across extended temperature and lifetime requirements.

Supply support for BUK7520-100A 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

This device belongs to NXP's TrenchMOS automotive power portfolio, engineered specifically for high-reliability, high-temperature power switching in safety-critical vehicle subsystems-including those subject to AEC-Q101 stress testing and ISO/TS 16949 manufacturing controls.

FAQ

Is BUK7520-100A suitable for high-frequency PWM motor control?

Yes-it supports PWM operation up to several hundred kHz, with 21 ns turn-on delay, 56 ns fall time, and 3430 pF input capacitance. Gate drive strength must be ≥1 A peak to achieve these timings; its 17 mΩ R_DS(on) minimizes conduction loss, while 76 ns reverse recovery time ensures clean freewheeling in brushed DC motor H-bridges.

What is the maximum allowable mounting base temperature for continuous 63 A operation?

The datasheet specifies 63 A continuous drain current only at T_mb = 25 °C. At 100 °C mounting base temperature, the rated current drops to 44 A. Derating follows Figure 1 in the datasheet; operation above 100 °C mounting base requires active cooling or reduced load to maintain junction temperature ≤175 °C.

Does the mounting base require electrical isolation from the heatsink?

Yes-the mounting base is internally connected to the drain terminal. If the heatsink is grounded or at a different potential, electrical isolation (e.g., mica washer + thermal grease or isolated mounting kit) is mandatory to prevent short circuits. Failure to isolate may cause catastrophic failure or system ground loop issues.

Can BUK7520-100A replace older BUZ70 or IRFZ44N devices in existing designs?

It can serve as a functional upgrade: both share TO-220AB package and 100 V rating, but BUK7520-100A offers lower R_DS(on) (17 mΩ vs. ~28 mΩ), AEC-Q101 qualification, and 400 mJ avalanche rating-unavailable in BUZ70/IRFZ44N. Layout is pin-compatible, but gate drive and thermal design should be revalidated due to higher current density.