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

NXP Semiconductors BUK654R8-40C,127

Name: BUK654R8-40C,127
Brand: NXP Semiconductors
SKU: BUK654R8-40C,127
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK654R8-40C,127

Manufacturer:: NXP Semiconductors

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: BUK654R8-40C,127.pdf

Description:: MOSFET N-CH 40V 100A TO220AB

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Product details

Overview

BUK654R8-40C from Nexperia is an N-channel TrenchMOS intermediate-level power MOSFET in TO-220AB (SOT78A) package, rated for 40 V V_DS, 4.8 mΩ R_DS(on) at 10 V V_GS, and 100 A continuous drain current at T_mb = 25 °C. It serves as a high-current, thermally robust switching element in automotive power control circuits.

For engineers reviewing the BUK654R8-40C datasheet, BUK654R8-40C pinout, BUK654R8-40C application, or BUK654R8-40C equivalent, key selection criteria include its AEC Q101 qualification, 175 °C junction rating, low on-resistance at logic-level gate drive, avalanche ruggedness (179 mJ), and thermal resistance of 0.95 K/W from junction to mounting base.

Technical Context

This device uses advanced TrenchMOS technology to achieve low R_DS(on) while maintaining robust switching performance and thermal stability. Its gate threshold voltage (1.8–2.8 V at 25 °C) enables compatibility with both standard and logic-level drive sources.

The integrated source-drain diode supports freewheeling in inductive loads, with 0.85–1.2 V forward voltage at 25 A and 42 ns reverse recovery time. Avalanche energy rating (179 mJ, unclamped) and 175 °C maximum junction temperature support operation in thermally demanding automotive environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum drain-source blocking voltage; defines use in 12 V automotive systems with transient margin.
R_DS(on)	3.84–4.8 mΩ @ V_GS = 10 V, I_D = 25 A, T_j = 25 °C - Enables <1 W conduction loss at 50 A, critical for high-efficiency motor/solenoid drivers.
I_D (cont)	100 A @ T_mb = 25 °C - Continuous current capability limited by TO-220AB package thermal design; derates to 88 A at T_mb = 100 °C.
E_AS	179 mJ - Non-repetitive avalanche energy; allows safe operation during inductive load turn-off without external snubbers.
T_j max	175 °C - Junction temperature limit enabling reliable operation in engine bay and transmission control modules.
R_th(j-mb)	0.95 K/W - Thermal resistance from die to mounting base; requires heatsink interface with ≤0.5 K/W total thermal path for full 100 A rating.
Q_G(tot)	88 nC @ V_GS = 10 V - Total gate charge determines driver strength requirement; compatible with standard gate drivers (e.g., TC442x, UCCx).

Pinout & Package

Package: TO-220AB (SOT78A), plastic single-ended package with heatsink-mounted mounting base connected to drain. Requires mechanical mounting via single hole; leads are tin-plated except terminal zone.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Control terminal; accepts 1.8–16 V DC gate-source voltage; threshold ensures logic-level compatibility (V_GS(th) = 1.8–2.8 V).
2 (D)	Drain	Main high-side current path; electrically tied to mounting base; must be isolated from heatsink unless system ground reference permits.
3 (S)	Source	Power return path and gate reference; low-inductance layout critical due to internal L_S = 7.5 nH.
Mounting base (mb)	Drain connection	Integral part of drain terminal; provides primary thermal path to heatsink; requires thermal interface material and electrical isolation per application.

Key Features

Feature	Design Value
AEC Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for power steering and transmission control.
Logic-level gate drive	V_GS(th) range (1.8–2.8 V) and R_DS(on) = 5.2 mΩ @ V_GS = 5 V enable direct MCU GPIO or low-voltage driver interface without level-shifting.
175 °C junction rating	Supports sustained operation in under-hood environments where ambient exceeds 125 °C - eliminates need for derating in start-stop micro-hybrid ECUs.
Low R_DS(on) × Q_G figure-of-merit	4.8 mΩ × 88 nC = 422 mΩ·nC - balances conduction and switching losses for high-frequency PWM in lamp/motor control (≤20 kHz).
Integrated source-drain diode	V_SD = 0.85–1.2 V @ 25 A and t_rr = 42 ns - enables efficient freewheeling in solenoid and brushed DC motor drives without external diode.

Applications

Electric Power Steering (EPS)	Start-Stop Micro-Hybrid Control
Use Scenario: High-current bidirectional motor phase switching in column-assist or rack-assist EPS modules. IC Role / Device Role / Timing Role: Main power switch in half-bridge or 3-phase inverter stage; handles peak currents up to 500 A (pulsed) with fast turn-on/turn-off timing (t_d(on) = 23 ns, t_f = 77 ns). Use Value: Low R_DS(on) minimizes heat generation during continuous assist; avalanche rating absorbs regenerative energy during emergency stop maneuvers.	Use Scenario: Controlling starter motor engagement and battery disconnect in 12 V micro-hybrid vehicles. IC Role / Device Role / Timing Role: High-side load switch managing cranking current (≥200 A) and battery isolation; operates with precise timing controlled by vehicle ECU. Use Value: 175 °C rating ensures reliability during repeated hot cranking cycles; 100 A continuous rating supports extended idle-stop duration without thermal shutdown.
Transmission Solenoid Driver	LED Headlamp Dimming
Use Scenario: Driving electro-hydraulic pressure control solenoids in automatic transmissions. IC Role / Device Role / Timing Role: PWM-controlled high-side switch delivering 2–5 A at 10–100 Hz; requires stable R_DS(on) across -40 to 150 °C. Use Value: R_DS(on) variation <2× from -55 to 175 °C ensures consistent solenoid force; AEC Q101 qualification guarantees long-term functional safety.	Use Scenario: High-current dimming switch for adaptive LED headlamps (up to 15 A per channel). IC Role / Device Role / Timing Role: Low-loss series pass element in constant-current LED driver; switched at 1–20 kHz for analog-like dimming resolution. Use Value: 4.8 mΩ R_DS(on) limits conduction loss to <1.1 W at 15 A, reducing thermal load on compact headlamp PCBs.

Electric Power Steering (EPS)

Start-Stop Micro-Hybrid Control

Use Scenario: High-current bidirectional motor phase switching in column-assist or rack-assist EPS modules.

IC Role / Device Role / Timing Role: Main power switch in half-bridge or 3-phase inverter stage; handles peak currents up to 500 A (pulsed) with fast turn-on/turn-off timing (t_d(on) = 23 ns, t_f = 77 ns).

Use Value: Low R_DS(on) minimizes heat generation during continuous assist; avalanche rating absorbs regenerative energy during emergency stop maneuvers.

Use Scenario: Controlling starter motor engagement and battery disconnect in 12 V micro-hybrid vehicles.

IC Role / Device Role / Timing Role: High-side load switch managing cranking current (≥200 A) and battery isolation; operates with precise timing controlled by vehicle ECU.

Use Value: 175 °C rating ensures reliability during repeated hot cranking cycles; 100 A continuous rating supports extended idle-stop duration without thermal shutdown.

Transmission Solenoid Driver

LED Headlamp Dimming

Use Scenario: Driving electro-hydraulic pressure control solenoids in automatic transmissions.

IC Role / Device Role / Timing Role: PWM-controlled high-side switch delivering 2–5 A at 10–100 Hz; requires stable R_DS(on) across -40 to 150 °C.

Use Value: R_DS(on) variation <2× from -55 to 175 °C ensures consistent solenoid force; AEC Q101 qualification guarantees long-term functional safety.

Use Scenario: High-current dimming switch for adaptive LED headlamps (up to 15 A per channel).

IC Role / Device Role / Timing Role: Low-loss series pass element in constant-current LED driver; switched at 1–20 kHz for analog-like dimming resolution.

Use Value: 4.8 mΩ R_DS(on) limits conduction loss to <1.1 W at 15 A, reducing thermal load on compact headlamp PCBs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N4F7AG	40 V, 2.2 mΩ R_DS(on), TO-220FP package (isolated tab); higher current (220 A), but larger footprint and no AEC Q101 certification.	Non-automotive industrial motor drives requiring higher current density; unsuitable for space-constrained automotive ECUs.	Select only if AEC Q101 compliance is not required and board layout accommodates larger TO-220FP outline.
IRF1404ZLPbF	40 V, 4.8 mΩ R_DS(on), TO-220AB; AEC Q101 not claimed; 175 °C rating confirmed; lower avalanche energy (120 mJ vs. 179 mJ).	Cost-sensitive 12 V automotive accessories (e.g., seat heaters, HVAC blowers) where reduced avalanche margin is acceptable.	Use when budget constraints outweigh need for full AEC Q101 validation and higher-energy fault tolerance.

Compared with STL220N4F7AG and IRF1404ZLPbF, the BUK654R8-40C uniquely combines AEC Q101 qualification, 179 mJ avalanche ruggedness, and TO-220AB mechanical compatibility - making it the preferred choice for safety-critical automotive power switching where regulatory compliance and transient robustness are mandatory.

Availability

BUK654R8-40C is available at Aetrix Electronics and suitable for electric power steering, start-stop micro-hybrid control, and transmission solenoid driver applications requiring stable component supply across automotive production lifecycles.

Supply support for BUK654R8-40C 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 leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.

The BUK654R8-40C belongs to Nexperia's TrenchMOS automotive power portfolio, engineered specifically for high-reliability 12 V automotive power switching in thermally aggressive environments.

FAQ

What is the maximum continuous drain current rating for BUK654R8-40C?

The BUK654R8-40C supports 100 A continuous drain current at mounting base temperature (T_mb) of 25 °C, derating to 88 A at T_mb = 100 °C. This rating is package-limited and assumes proper heatsinking with thermal resistance ≤0.95 K/W to maintain junction temperature ≤175 °C. The BUK654R8-40C datasheet specifies these values in Figure 1 and Table 4.

Is BUK654R8-40C suitable for logic-level gate drive applications?

Yes, the BUK654R8-40C features a gate threshold voltage (V_GS(th)) of 1.8–2.8 V at 25 °C and delivers R_DS(on) = 5.2 mΩ at V_GS = 5 V, enabling direct drive from 3.3 V or 5 V microcontrollers without external level shifters. Its intermediate-level gate drive architecture ensures stable operation across temperature and process variations. This behavior is documented in Table 6 and Figure 8 of the BUK654R8-40C datasheet.

Does BUK654R8-40C have AEC Q101 qualification?

Yes, the BUK654R8-40C is explicitly designed and qualified to AEC Q101 standards for automotive applications, as stated in Section 1.1 and 1.2 of the official product data sheet. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), ensuring reliability in automotive power systems such as electric power steering and transmission control. The BUK654R8-40C product profile confirms this compliance.

What is the thermal resistance from junction to mounting base for BUK654R8-40C?

The thermal resistance from junction to mounting base (R_th(j-mb)) for BUK654R8-40C is 0.95 K/W, as specified in Table 5 of the datasheet. This value reflects the intrinsic thermal path through the die, bond wires, and package substrate to the heatsink-mounting surface. Effective heatsinking requires minimizing interface resistance (e.g., using thermal paste) to ensure the BUK654R8-40C maintains safe junction temperatures under full-load conditions.

Can BUK654R8-40C be used in avalanche mode?

Yes, the BUK654R8-40C is rated for non-repetitive drain-source avalanche energy (E_AS) of 179 mJ under specified test conditions (I_D = 100 A, V_sup ≤40 V, R_GS = 50 Ω, T_j(init) = 25 °C). This capability allows safe operation during inductive load switching transients without external protection. Repetitive avalanche is limited by average junction temperature (170 °C), as detailed in Table 4 and Section 4 of the BUK654R8-40C datasheet.

BUK654R8-40C,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):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 100A (Tc)

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

Rds On (Max) @ Id, Vgs:: 4.8mOhm @ 25A, 10V

Vgs(th) (Max) @ Id:: 2.8V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 88 nC @ 10 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 5200 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 158W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

BUK654R8-40C,127 FAQ

1.How can I place an order for BUK654R8-40C,127 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK654R8-40C,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 BUK654R8-40C,127 reliable?

The price and inventory of BUK654R8-40C,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK654R8-40C,127 is usually 5 days.

3.What payment methods are accepted for BUK654R8-40C,127?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK654R8-40C,127 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK654R8-40C,127?

BUK654R8-40C,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK654R8-40C,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 BUK654R8-40C,127?

For technical support, including BUK654R8-40C,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK654R8-40C,127 requirements.

6.How does Aetrix verify that BUK654R8-40C,127 is sourced from the original manufacturer or authorized distributors?

All BUK654R8-40C,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 BUK654R8-40C,127 meets industry standards.

7.What is the process for return or replacement of BUK654R8-40C,127?

All BUK654R8-40C,127 units undergo pre-shipment inspection (PSI). If there is an issue with BUK654R8-40C,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 BUK654R8-40C,127 part is unused and in its original packaging.

Return procedure for BUK654R8-40C,127:

1.Submit a request within 90 days.

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

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