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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

NXP Semiconductors BUK9528-100A,127

Name: BUK9528-100A,127
Brand: NXP Semiconductors
SKU: BUK9528-100A,127
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9528-100A,127

Manufacturer:: NXP Semiconductors

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: BUK9528-100A,127.pdf

Description:: MOSFET N-CH 100V 49A TO220AB

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Product details

Overview

BUK9528-100A,127 from NXP Semiconductors (formerly Philips) is an N-channel enhancement-mode logic-level TrenchMOS power transistor in TO220AB and SOT404 packages, rated for 100 V V_DS, 49 A DC drain current at T_mb = 25 °C, and 28 mΩ R_DS(ON) at V_GS = 5 V - designed for automotive and industrial switching applications requiring low gate-drive voltage compatibility.

For engineers reviewing the BUK9528-100A,127 datasheet, BUK9528-100A,127 pinout, BUK9528-100A,127 application, or BUK9528-100A,127 equivalent, key selection criteria include its 5 V logic-level gate drive capability, 175 °C junction temperature rating, avalanche energy rating of 45 mJ, thermal resistance R_{th j-mb} ≤ 0.9 K/W, and dual-package availability (TO220AB/SOT404) with validated mounting base connection.

Technical Context

This device employs trench-gate MOSFET technology to achieve ultra-low on-state resistance while maintaining robust unclamped inductive switching performance. Its gate threshold voltage (V_GS(TO)) ranges from 1.0 V to 2.0 V at 25 °C and remains functional down to 0.5 V at 175 °C, enabling reliable turn-on with standard 5 V microcontroller outputs.

The integrated body diode supports reverse conduction up to 49 A continuous and exhibits V_SD = 0.85–1.2 V at I_F = 25 A, with t_rr = 63 ns and Q_rr = 0.22 µC - critical for synchronous rectification and flyback snubberless designs where diode recovery behavior directly impacts efficiency and EMI.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	100 V - supports 24 V and 48 V automotive/industrial bus systems with ≥2× safety margin against transients.
I_D (DC)	49 A at T_mb = 25 °C - enables high-current load switching without external heatsink under moderate ambient conditions.
R_DS(ON)	28 mΩ max at V_GS = 5 V - ensures <1.8 W conduction loss at 30 A, reducing thermal design burden.
Q_G	Typ. 32 nC (V_DS = 14 V) - compatible with standard gate drivers; enables fast 58 ns rise time with 10 Ω RG.
t_rr / Q_rr	63 ns / 0.22 µC - minimizes switching losses and voltage overshoot during diode commutation in hard-switched topologies.
W_DSS	45 mJ non-repetitive avalanche energy - allows safe operation in unclamped inductive turn-off events common in motor control and solenoid drivers.
R_{th j-mb}	≤ 0.9 K/W - enables direct thermal coupling to heatsink via metal tab, supporting >100 W dissipation with proper mounting.

Pinout & Package

BUK9528-100A,127 is offered in two thermally optimized plastic packages: TO220AB (SOT78) and SOT404 (D2-PAK variant), both featuring pin 2 (drain) electrically connected to the mounting base/tab for low-inductance, high-current path routing and efficient heat transfer.

Pin/Terminal	Circuit Role	Design Meaning
1	Gate	Logic-level input node; requires ESD protection per IEC 61000-4-2; 10 kΩ pull-down recommended for default-off state.
2	Drain	Main high-side power path terminal; internally bonded to metal mounting base - must be electrically isolated from PCB ground unless system topology requires it.
3	Source	Reference node for gate drive and current sensing; internal source inductance L_s = 7.5 nH affects high-di/dt stability.
Tab/MB	Drain (common)	Thermal and electrical extension of pin 2; provides mechanical anchoring and primary heat conduction path to heatsink.

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced at V_GS = 4.5 V (R_DS(ON) ≤ 31 mΩ), eliminating need for gate driver ICs in 5 V MCU-based systems.
TrenchMOS technology	Delivers 27 mΩ R_DS(ON) at V_GS = 10 V - 20% lower than planar MOSFETs of same die size, improving power density.
Robust avalanche rating	Rated for 45 mJ single-pulse unclamped inductive energy - validated per JEDEC JESD24-11, enabling reliable operation in motor phase-legs.
Low gate charge	Q_G = 32 nC typ. at V_DS = 14 V - reduces gate driver power consumption and enables >100 kHz PWM operation with minimal switching loss.
High-temperature operation	Specified up to T_j = 175 °C with V_GS(TO) stable down to 0.5 V - supports under-hood automotive environments without derating.

Applications

Automotive Body Control Module	Industrial DC Motor Driver
Use Scenario: Switching 12 V/24 V loads including headlights, HVAC blowers, and window lift motors in vehicle body electronics. IC Role / Device Role / Timing Role: High-side load switch with integrated body diode for freewheeling; controlled by 5 V CAN/LIN microcontroller GPIO. Use Value: Eliminates external flyback diode and gate driver; 28 mΩ R_DS(ON) limits self-heating to <1.5 W at 25 A, enabling compact PCB layout.	Use Scenario: Half-bridge upper switch in 48 V BLDC motor controllers for factory automation equipment. IC Role / Device Role / Timing Role: Power stage switch handling 30–40 A peak currents; synchronized with complementary low-side FET using dead-time control. Use Value: 63 ns reverse recovery time and 0.22 µC Q_rr reduce shoot-through risk and voltage spikes during commutation, improving system reliability.
Off-Board EV Charger Power Stage	Telecom DC-DC Converter Primary Switch
Use Scenario: Secondary-side synchronous rectifier or auxiliary power switch in liquid-cooled EV charging modules operating at 400–800 V bus. IC Role / Device Role / Timing Role: Logic-level-controlled isolation barrier switch; driven by isolated gate driver referenced to floating secondary ground. Use Value: 100 V rating provides headroom above 60–80 V secondary rails; 0.9 K/W R_{th j-mb} enables direct cold-plate mounting for >150 W continuous dissipation.	Use Scenario: Primary-side switch in 48 V input telecom DC-DC converters delivering 12 V/50 A output. IC Role / Device Role / Timing Role: Hard-switched MOSFET in forward or active-clamp flyback topology; operated at 200–500 kHz with zero-voltage switching assist. Use Value: Low C_iss (3220–4293 pF) and Crss (187–256 pF) minimize capacitive losses and improve ZVS initiation margin across line/load range.

Automotive Body Control Module

Industrial DC Motor Driver

Use Scenario: Switching 12 V/24 V loads including headlights, HVAC blowers, and window lift motors in vehicle body electronics.

IC Role / Device Role / Timing Role: High-side load switch with integrated body diode for freewheeling; controlled by 5 V CAN/LIN microcontroller GPIO.

Use Value: Eliminates external flyback diode and gate driver; 28 mΩ R_DS(ON) limits self-heating to <1.5 W at 25 A, enabling compact PCB layout.

Use Scenario: Half-bridge upper switch in 48 V BLDC motor controllers for factory automation equipment.

IC Role / Device Role / Timing Role: Power stage switch handling 30–40 A peak currents; synchronized with complementary low-side FET using dead-time control.

Use Value: 63 ns reverse recovery time and 0.22 µC Q_rr reduce shoot-through risk and voltage spikes during commutation, improving system reliability.

Off-Board EV Charger Power Stage

Telecom DC-DC Converter Primary Switch

Use Scenario: Secondary-side synchronous rectifier or auxiliary power switch in liquid-cooled EV charging modules operating at 400–800 V bus.

IC Role / Device Role / Timing Role: Logic-level-controlled isolation barrier switch; driven by isolated gate driver referenced to floating secondary ground.

Use Value: 100 V rating provides headroom above 60–80 V secondary rails; 0.9 K/W R_{th j-mb} enables direct cold-plate mounting for >150 W continuous dissipation.

Use Scenario: Primary-side switch in 48 V input telecom DC-DC converters delivering 12 V/50 A output.

IC Role / Device Role / Timing Role: Hard-switched MOSFET in forward or active-clamp flyback topology; operated at 200–500 kHz with zero-voltage switching assist.

Use Value: Low C_iss (3220–4293 pF) and Crss (187–256 pF) minimize capacitive losses and improve ZVS initiation margin across line/load range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP110N10F7	100 V, 110 A, R_DS(ON) = 8.5 mΩ @ 10 V; requires 10 V gate drive for full spec compliance.	Higher current capacity but not logic-level - needs gate driver for 3.3/5 V MCU interfaces.	Select when higher current and lower R_DS(ON) justify added gate driver complexity and board space.
IRF3205PBF	55 V, 110 A, R_DS(ON) = 8.0 mΩ @ 10 V; V_GS(th) = 2–4 V - marginal at 4.5 V, not guaranteed logic-level.	Lower voltage rating limits use to ≤24 V systems; unsuitable for 48 V automotive or industrial rails.	Choose only for cost-sensitive 12–24 V applications where 55 V rating suffices and gate drive is ≥10 V.

Compared with STP110N10F7 and IRF3205PBF, BUK9528-100A,127 uniquely combines 100 V rating, true 5 V logic-level operation, and automotive-grade thermal robustness - making it the only drop-in solution for 48 V MCU-driven switching without gate driver redesign or voltage derating.

Availability

BUK9528-100A,127 is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drives, off-board EV charger power stages, and telecom DC-DC converter primary switches requiring stable component supply across extended production lifecycles.

Supply support for BUK9528-100A,127 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' semiconductor division.

The BUK9528-100A,127 belongs to NXP's TrenchMOS logic-level power MOSFET product line, engineered specifically for automotive-grade reliability, low-voltage gate drive compatibility, and high-current switching in harsh thermal environments.

FAQ

What is the maximum continuous drain current for BUK9528-100A,127 at 100 °C mounting base temperature?

The BUK9528-100A,127 supports 34 A DC drain current at T_mb = 100 °C, as specified in the Limiting Values table. This derating reflects thermal constraints of the TO220AB and SOT404 packages; actual usable current depends on heatsink design and ambient airflow. The BUK9528-100A,127 datasheet provides normalized current derating curves (Fig.2) to determine safe operating current across the full -55 °C to +175 °C junction temperature range.

Does BUK9528-100A,127 have avalanche capability, and how is it rated?

Yes, BUK9528-100A,127 is rated for non-repetitive unclamped inductive avalanche energy of 45 mJ under defined test conditions (ID = 30 A, VDD ≤ 25 V, VGS = 5 V, RGS = 50 Ω, Tmb = 25 °C). This rating is validated per JEDEC standards and supports robust operation in motor control and relay-driving applications where inductive kickback occurs. The BUK9528-100A,127 datasheet includes Fig.18 showing maximum permissible repetitive avalanche current versus time.

What are the package options and thermal resistances for BUK9528-100A,127?

BUK9528-100A,127 is qualified in TO220AB (SOT78) and SOT404 (D2-PAK) packages. Its thermal resistance junction-to-mounting-base (R_{th j-mb}) is ≤ 0.9 K/W, enabling efficient heat transfer to heatsinks. Ambient thermal resistance is 60 K/W (TO220AB, free air) and 50 K/W (SOT404, minimum FR4 footprint), per the Thermal Resistances table. The BUK9528-100A,127 mechanical drawings (Figs.20–21) specify exact dimensions and mounting guidelines for both packages.

Is BUK9528-100A,127 suitable for 3.3 V microcontroller gate drive?

BUK9528-100A,127 is specified as a logic-level FET with V_GS(th) = 1.0–2.0 V at 25 °C and R_DS(ON) = 31 mΩ max at V_GS = 4.5 V, ID = 25 A - confirming usability with 3.3 V systems under light-to-moderate loads. However, full 49 A rating requires ≥5 V gate drive. For 3.3 V-only designs, verify R_DS(ON) and power dissipation at actual operating current using Fig.7 (R_DS(ON) vs. V_GS) in the BUK9528-100A,127 datasheet.

How does the internal body diode performance of BUK9528-100A,127 compare to discrete Schottky diodes?

The BUK9528-100A,127 body diode has V_SD = 0.85–1.2 V at I_F = 25 A and t_rr = 63 ns, which is slower and higher-V_F than most Schottky diodes but optimized for integration and ruggedness. It eliminates external diode count in half-bridge and flyback topologies, though discrete Schottky may be preferred where <30 ns t_rr or <0.5 V V_F is mandatory. The BUK9528-100A,127 datasheet specifies all reverse diode parameters in Section "REVERSE DIODE LIMITING VALUES AND CHARACTERISTICS".

BUK9528-100A,127 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: TrenchMOS™

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 100 V

Current - Continuous Drain (Id) @ 25°C:: 49A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 27mOhm @ 25A, 10V

Vgs(th) (Max) @ Id:: 2V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 4293 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 166W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

BUK9528-100A,127 FAQ

1.How can I place an order for BUK9528-100A,127 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9528-100A,127 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BUK9528-100A,127 reliable?

The price and inventory of BUK9528-100A,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9528-100A,127 is usually 5 days.

3.What payment methods are accepted for BUK9528-100A,127?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9528-100A,127 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9528-100A,127?

BUK9528-100A,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9528-100A,127 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BUK9528-100A,127?

For technical support, including BUK9528-100A,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9528-100A,127 requirements.

6.How does Aetrix verify that BUK9528-100A,127 is sourced from the original manufacturer or authorized distributors?

All BUK9528-100A,127 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BUK9528-100A,127 meets industry standards.

7.What is the process for return or replacement of BUK9528-100A,127?

All BUK9528-100A,127 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9528-100A,127, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BUK9528-100A,127 part is unused and in its original packaging.

Return procedure for BUK9528-100A,127:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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