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

Nexperia USA Inc. BUK9535-55A,127

Name: BUK9535-55A,127
Brand: Nexperia USA Inc.
SKU: BUK9535-55A,127
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BUK9535-55A,127

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: BUK9535-55A,127.pdf

Description:: MOSFET N-CH 55V 34A TO220AB

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Product details

Overview

BUK9535-55A from NXP Semiconductors is a logic-level N-channel TrenchMOS FET in TO-220AB (SOT78A) package, rated for 55 V V_DS, 34 A continuous drain current at T_mb = 25 °C, and 24 mΩ typical R_DS(on) at V_GS = 10 V/ID = 25 A/25 °C. It is AEC-Q101 qualified for automotive critical power switching applications including engine control modules and body electronics.

For engineers reviewing the BUK9535-55A datasheet, BUK9535-55A pinout, BUK9535-55A application, or BUK9535-55A equivalent, this device delivers verified avalanche ruggedness (49 mJ), low gate threshold (1.5 V typ), and thermal resistance of 1.8 K/W (junction-to-mounting base), enabling robust high-current switching with minimal heatsink requirements.

Technical Context

This FET uses TrenchMOS technology to achieve low R_DS(on) while maintaining fast switching: t_d(on) = 6 ns, t_r = 36 ns, t_d(off) = 96 ns, and t_f = 73 ns under standard test conditions (V_DS = 30 V, V_GS = 5 V, R_G(ext) = 10 Ω). Its gate-source threshold voltage ranges from 0.5 V (T_j = 175 °C) to 2.3 V (T_j = −55 °C), supporting reliable turn-on across automotive temperature extremes.

The device integrates an intrinsic source-drain diode with V_SD = 0.85 V at I_S = 25 A and reverse recovery time t_rr = 36 ns, enabling efficient freewheeling in inductive loads. Its unclamped avalanche capability is characterized at I_D = 14 A, V_sup ≤ 25 V, and R_GS = 50 Ω, confirming suitability for automotive load-dump and inductive switching stress.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V - Maximum drain-source blocking voltage; supports 42 V automotive systems with margin for transients.
I_D (continuous)	34 A at T_mb = 25 °C - Sustains high-current loads without derating when properly heatsinked.
R_DS(on)	24 mΩ typ @ V_GS = 10 V - Enables <1 W conduction loss at 20 A, reducing thermal design burden.
E_AS	49 mJ non-repetitive avalanche energy - Withstands unclamped inductive energy spikes common in solenoid/relay drivers.
R_th(j-mb)	1.8 K/W - Direct thermal path to mounting base allows compact heatsink sizing for industrial and automotive enclosures.
V_GS(th)	1.5 V typ @ T_j = 25 °C - Ensures full enhancement with 3.3 V or 5 V logic-level gate drive, eliminating need for level shifters.
C_iss	880 pF typ - Low input capacitance enables fast switching with modest gate driver current (I_G ≈ 4.4 mA for 10 V in 2.2 µs).

Pinout & Package

TO-220AB (SOT78A) plastic single-ended package with heatsink-mounted tab; 3-lead configuration; mounting base electrically connected to drain.

Pin/Terminal	Circuit Role	Design Meaning
1 (G)	Gate	Controls channel conduction; requires ≤10 V drive; gate leakage <100 nA ensures low standby power.
2 (D)	Drain	Main high-side power terminal; internally bonded to mounting base for direct thermal coupling to heatsink.
3 (S)	Source	Power return path; referenced to system ground in low-side switch configurations.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive safety-critical applications including engine management and ADAS power stages.
TrenchMOS architecture	Delivers 24 mΩ R_DS(on) at 10 V drive while maintaining 55 V breakdown, optimizing efficiency vs. voltage rating trade-off.
Low V_GS(th) variation	Threshold remains functional down to 0.5 V at 175 °C junction, ensuring turn-on stability in under-hood environments.
Integrated source-drain diode	V_SD = 0.85 V @ 25 A enables efficient freewheeling in motor drives without external diode.
High peak current rating	I_DM = 133 A pulsed - Supports short-duration surge currents during motor startup or fault clearing.

Applications

Engine Control Unit (ECU) Fuel Injector Driver

Automotive Body Control Module (BCM) Power Distribution

Use Scenario: Switching 12 V fuel injectors with 10–20 ms pulse width and 5 A peak current in gasoline direct injection systems.

IC Role / Device Role / Timing Role: High-side or low-side power switch controlling injector coil energization and de-energization.

Use Value: 49 mJ avalanche rating absorbs inductive kickback without snubber; 24 mΩ R_DS(on) limits power loss to <2.5 W at 5 A.

Use Scenario: Centralized 12 V power distribution to lighting, wipers, and HVAC actuators in modern BCMs.

IC Role / Device Role / Timing Role: Load switch managing up to 34 A per channel with overcurrent and thermal protection coordination.

Use Value: 1.8 K/W R_th(j-mb) enables PCB-integrated heatsinking; AEC-Q101 qualification ensures 15-year field reliability.

Electric Power Steering (EPS) Motor Phase Switch

Industrial DC Motor Starter

Use Scenario: Half-bridge phase leg in 24 V EPS systems driving brushed or BLDC motors with 20–30 A continuous current.

IC Role / Device Role / Timing Role: Low-side switching element in H-bridge topology, synchronized with complementary high-side FET.

Use Value: 36 ns t_r/73 ns t_f minimizes switching losses at 20 kHz PWM; 133 A I_DM handles motor stall surges.

Use Scenario: Soft-start and run control of 48 V DC industrial motors in material handling equipment.

IC Role / Device Role / Timing Role: Main power switch in contactor-replacement circuit, controlled by PLC output.

Use Value: 55 V V_DS accommodates 48 V bus + 20 % ripple; TO-220AB mechanical robustness withstands vibration and thermal cycling.

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
STP36NF55	55 V V_DS, 36 A I_D, 22 mΩ R_DS(on) @ 10 V, but not AEC-Q101 qualified; higher C_iss (1200 pF).	Targeted at industrial motor drives, not automotive safety-critical use.	Select only for non-automotive designs where qualification is unnecessary and lower R_DS(on) justifies higher gate charge.
IRF3205	55 V V_DS, 110 A I_D, 8 mΩ R_DS(on) @ 10 V, but V_GS(th) = 2–4 V - not logic-level compatible with 3.3 V MCU outputs.	Used in high-power audio amplifiers and UPS systems requiring ultra-low on-resistance.	Choose only if gate drive ≥5 V is available and automotive qualification is irrelevant; avoid in 3.3 V logic systems.

Compared with STP36NF55 and IRF3205, the BUK9535-55A uniquely balances AEC-Q101 compliance, true logic-level operation (1.5 V V_GS(th)), and thermally optimized TO-220AB packaging - making it the sole choice for automotive power switching where safety, reliability, and 3.3/5 V MCU compatibility are mandatory.

Availability

BUK9535-55A is available at Aetrix Electronics and suitable for automotive engine control, body electronics, and industrial motor starter applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for BUK9535-55A 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 markets.

This device belongs to NXP's TrenchMOS logic-level power FET product line, engineered specifically for AEC-Q101-compliant automotive power switching where low gate drive voltage, avalanche ruggedness, and thermal performance are essential.

FAQ

Is BUK9535-55A suitable for 3.3 V microcontroller gate drive?

Yes. With a typical gate-source threshold voltage of 1.5 V at 25 °C and guaranteed minimum of 1.0 V, the BUK9535-55A fully enhances using standard 3.3 V GPIO outputs. Its R_DS(on) remains below 35 mΩ at V_GS = 5 V, ensuring low conduction loss without external level shifting.

What is the maximum allowable junction temperature during continuous operation?

The absolute maximum junction temperature is 175 °C, and the device is characterized for continuous operation up to that limit. Thermal design must ensure R_th(j-mb) × P_diss + T_mb ≤ 175 °C; at T_mb = 100 °C, the maximum continuous drain current is derated to 24 A per limiting values table.

Does the mounting base require electrical isolation from the heatsink?

No. The mounting base is internally connected to the drain terminal, so electrical isolation is required only if the heatsink is at a different potential than the drain node. Standard insulating pads or shoulder washers must be used when mounting to a grounded chassis or shared heatsink.

Can BUK9535-55A replace BUZ70 in existing designs?

Only with validation. While both are TO-220AB N-channel FETs, BUZ70 has higher R_DS(on) (40 mΩ), lower I_D (10 A), and no AEC-Q101 qualification. BUK9535-55A offers superior performance but may alter gate drive timing and thermal behavior; layout and transient testing are required before substitution.

BUK9535-55A,127 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

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):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 34A (Tc)

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

Rds On (Max) @ Id, Vgs:: 32mOhm @ 25A, 10V

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

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

Vgs (Max):: ±10V

Input Capacitance (Ciss) (Max) @ Vds:: 1173 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 85W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AB

BUK9535-55A,127 FAQ

1.How can I place an order for BUK9535-55A,127 through Aetrix?

Please submit a Request for Quotation (RFQ) for BUK9535-55A,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 BUK9535-55A,127 reliable?

The price and inventory of BUK9535-55A,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9535-55A,127 is usually 5 days.

3.What payment methods are accepted for BUK9535-55A,127?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9535-55A,127 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BUK9535-55A,127?

BUK9535-55A,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BUK9535-55A,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 BUK9535-55A,127?

For technical support, including BUK9535-55A,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9535-55A,127 requirements.

6.How does Aetrix verify that BUK9535-55A,127 is sourced from the original manufacturer or authorized distributors?

All BUK9535-55A,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 BUK9535-55A,127 meets industry standards.

7.What is the process for return or replacement of BUK9535-55A,127?

All BUK9535-55A,127 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9535-55A,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 BUK9535-55A,127 part is unused and in its original packaging.

Return procedure for BUK9535-55A,127:

1.Submit a request within 90 days.

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

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