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Nexperia USA Inc. BUK663R2-40C,118

Name: BUK663R2-40C,118
Brand: Nexperia USA Inc.
SKU: BUK663R2-40C,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK663R2-40C,118

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: BUK663R2-40C,118.pdf

Description:: NEXPERIA BUK663R2-40C - 100A, 40

Quantity:: RFQ Add To RFQ list

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Inventory:6,748

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Product details

Overview

BUK663R2-40C from Nexperia is an N-channel TrenchMOS FET optimized for intermediate-level gate drive in automotive power switching, featuring 40 V V_DS, 2.7 mΩ R_DS(on) at 10 V_GS/25 A/25 °C, 100 A continuous drain current, and AEC-Q101 qualification for 12 V systems including electric power steering and start-stop micro-hybrid control.

For engineers reviewing the BUK663R2-40C datasheet, BUK663R2-40C pinout, BUK663R2-40C application, or BUK663R2-40C equivalent, key selection criteria include thermal robustness (175 °C T_j rating), avalanche energy (368 mJ unclamped), low-inductance D2PAK package, and gate charge profile (Q_G(tot) = 125 nC) for fast-switching 12 V automotive loads.

Technical Context

This device employs advanced TrenchMOS technology to deliver stable on-resistance across temperature (R_DS(on) = 6.7 mΩ max at 175 °C), with gate threshold voltage (V_GS(th)) ranging from 0.8 V at 175 °C to 2.8 V at 25 °C - enabling reliable turn-on under wide thermal and supply conditions.

Its dynamic characteristics include Q_GD = 42 nC and C_iss = 6016 pF (typ), supporting controlled switching in high-current motor and solenoid drivers; internal inductances (L_D = 3.5 nH, L_S = 7.5 nH) are minimized to reduce voltage overshoot during hard commutation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V maximum - supports full 12 V automotive battery transients up to ISO 7637-2 Pulse 5a (up to 40 V).
R_DS(on)	2.7 mΩ typ at V_GS = 10 V, I_D = 25 A, T_j = 25 °C - enables <1.7 W conduction loss at 100 A, critical for thermally constrained modules.
I_D (cont)	100 A at T_mb = 25 °C - defined by package thermal limits, not silicon capability, requiring proper heatsinking.
E_AS	368 mJ unclamped avalanche energy - allows safe operation during inductive load turn-off without external snubbers in solenoid/motor circuits.
R_th(j-mb)	0.74 K/W - enables 175 °C junction operation with ≤130 °C mounting base temperature under 204 W dissipation.
Q_G(tot)	125 nC at V_DS = 32 V, V_GS = 10 V - determines gate driver power requirement and switching speed in PWM-controlled transmission valves.
V_GS(th)	1.8–2.8 V at 25 °C; 0.8 V min at 175 °C - ensures gate drive compatibility with standard 5 V or 3.3 V logic controllers across full temperature range.

Pinout & Package

Supplied in SOT404 (D2PAK) plastic surface-mount package with isolated mounting base connected to drain; optimized for high-power thermal transfer via PCB copper pour or heatsink interface.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Control terminal accepting 10 V logic-level drive; threshold range ensures compatibility with automotive microcontrollers.
2 (D)	Drain	Main high-side power path; electrically tied to mounting base for direct thermal coupling to heatsink.
3 (S)	Source	Power return path and reference for gate drive; separate lead minimizes source inductance (7.5 nH) for clean switching.
Mounting Base	Drain / Thermal Interface	Exposed metal pad soldered to PCB thermal plane; provides primary heat conduction path (R_th(j-mb) = 0.74 K/W).

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC-Q101 Rev D.
175 °C junction rating	Enables operation in engine bay or transmission control units where ambient exceeds 125 °C.
Low R_DS(on) drift with temperature	R_DS(on) increases only ~2.5× from 25 °C to 175 °C - maintains predictable conduction loss in thermal transients.
High avalanche ruggedness	368 mJ unclamped E_AS supports robust inductive load switching without external protection components.
Optimized gate charge profile	Q_GD/Q_G(tot) ratio of ~34% balances switching speed and EMI control in motor phase-leg applications.

Applications

Electric Power Steering (EPS)

Start-Stop Micro-Hybrid Control

Use Scenario: High-current MOSFET used in three-phase EPS motor inverter half-bridges to drive 12 V brushless motors.

IC Role / Device Role / Timing Role: Low-side and high-side switching element delivering precise PWM-controlled torque assist.

Use Value: 2.7 mΩ R_DS(on) and 0.74 K/W thermal resistance minimize heat generation and enable compact module design within tight EPS housing constraints.

Use Scenario: Main battery disconnect switch controlling 12 V starter motor engagement and alternator regulation during engine restart.

IC Role / Device Role / Timing Role: High-reliability power switch handling >100 A peak currents during cranking pulses.

Use Value: 368 mJ avalanche energy withstands inductive kickback from starter solenoid coil without failure over 100,000+ cycles.

Transmission Valve Control

12 V Lamp & Solenoid Driver

Use Scenario: PWM-driven proportional solenoid valve in automatic transmission hydraulic control unit regulating line pressure and shift timing.

IC Role / Device Role / Timing Role: Precision current-regulated switch operating at 10–50 kHz PWM frequency.

Use Value: Tight V_GS(th) distribution (1.8–2.8 V) and low Q_G(tot) ensure consistent turn-on timing across temperature, critical for closed-loop pressure accuracy.

Use Scenario: High-side driver for LED headlamps and HVAC actuators in body control modules.

IC Role / Device Role / Timing Role: Load switch providing short-circuit and overtemperature protection while driving resistive/inductive loads.

Use Value: Integrated source-drain diode (V_SD = 0.8 V typ) clamps inductive flyback during lamp dimming transitions, eliminating need for external freewheeling diodes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N4F7AG	40 V, 2.2 mΩ R_DS(on), 200 A rating, PowerFLAT 5x6 package; lower R_DS(on) but higher Q_G (210 nC).	Better conduction efficiency at high current, but slower switching and less avalanche margin (290 mJ).	Select when thermal budget is tighter than switching speed requirements, and PCB layout supports larger footprint.
IRF1404ZLPbF	40 V, 4.0 mΩ R_DS(on), TO-220AB package; higher on-resistance, no AEC-Q101 qualification.	Lower cost for non-automotive industrial use; lacks automotive reliability validation and thermal performance.	Acceptable for 12 V industrial motor controls where AEC-Q101 is not mandated and heatsinking is unconstrained.

Compared with STL220N4F7AG and IRF1404ZLPbF, the BUK663R2-40C delivers optimal balance of automotive qualification, thermal robustness (175 °C), and switching efficiency (125 nC Q_G + 42 nC Q_GD) for space-constrained EPS and transmission modules requiring long-term field reliability.

Availability

BUK663R2-40C is available at Aetrix Electronics and suitable for electric power steering, start-stop micro-hybrid systems, and transmission control modules requiring stable component supply across extended automotive production lifecycles.

Supply support for BUK663R2-40C 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 semiconductor expert focused on essential semiconductors, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

This part belongs to Nexperia's AEC-Q101-qualified TrenchMOS automotive power FET product line, engineered specifically for thermally demanding 12 V vehicle subsystems requiring high-current switching with proven field reliability.

FAQ

What is the maximum continuous drain current for BUK663R2-40C under real-world PCB conditions?

The datasheet specifies 100 A continuous drain current at T_mb = 25 °C, but this is package-limited - actual achievable current depends on PCB copper area, thermal vias, and heatsink attachment. With 100 cm² 2-oz copper and thermal interface material, sustained 75–85 A is typical before reaching 175 °C junction limit.

Does BUK663R2-40C require a gate resistor for automotive PWM applications?

Yes - a 5–10 Ω gate resistor is recommended to damp ringing caused by L_D (3.5 nH) and L_S (7.5 nH), especially in high-di/dt motor phases. This prevents spurious turn-on and reduces EMI, while maintaining acceptable switching times (t_f = 117 ns, t_d(off) = 224 ns).

Can BUK663R2-40C be used in parallel configurations for higher current handling?

Yes - its positive temperature coefficient of R_DS(on) (increases with T_j) enables inherent current sharing. However, matched gate drive routing and symmetrical thermal layout are mandatory; derate total current by 15% versus single-device rating to account for thermal coupling and parameter spread.

Is the mounting base electrically isolated from the drain in BUK663R2-40C?

No - the mounting base is internally connected to the drain terminal (Pin 2), as confirmed in Table 2 and Figure 17. This requires electrical isolation (e.g., insulating thermal pad or ceramic washer) when mounting to a grounded heatsink to prevent short circuits.

BUK663R2-40C,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: TrenchMOS™

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Bulk

Product Status:: Active

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):: 10V

Rds On (Max) @ Id, Vgs:: 3.2mOhm @ 25A, 10V

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

Gate Charge (Qg) (Max) @ Vgs:: 125 nC @ 10 V

Vgs (Max):: ±16V

Input Capacitance (Ciss) (Max) @ Vds:: 8020 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 204W (Tc)

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

BUK663R2-40C,118 FAQ

1.How can I place an order for BUK663R2-40C,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK663R2-40C,118 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 BUK663R2-40C,118 reliable?

The price and inventory of BUK663R2-40C,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK663R2-40C,118 is usually 5 days.

3.What payment methods are accepted for BUK663R2-40C,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK663R2-40C,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK663R2-40C,118?

BUK663R2-40C,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK663R2-40C,118 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 BUK663R2-40C,118?

For technical support, including BUK663R2-40C,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK663R2-40C,118 requirements.

6.How does Aetrix verify that BUK663R2-40C,118 is sourced from the original manufacturer or authorized distributors?

All BUK663R2-40C,118 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 BUK663R2-40C,118 meets industry standards.

7.What is the process for return or replacement of BUK663R2-40C,118?

All BUK663R2-40C,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK663R2-40C,118, 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 BUK663R2-40C,118 part is unused and in its original packaging.

Return procedure for BUK663R2-40C,118:

1.Submit a request within 90 days.

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

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