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Nexperia USA Inc. BUK9219-55A,118
- Part No.:
- BUK9219-55A,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
BUK9219-55A,118.pdf
- Description:
- MOSFET N-CH 55V 55A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:7,746
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Product details
Overview
BUK9219-55A from Nexperia is a logic-level N-channel TrenchMOS FET in DPAK (SOT428) package, rated for 55 V VDS, 55 A continuous drain current at Tmb = 25 °C, and 175 °C junction temperature. It delivers 20 mΩ RDS(on) at VGS = 4.5 V and is AEC-Q101 qualified for automotive power switching of 12 V/24 V loads including motors, lamps, and solenoids.
For engineers reviewing the BUK9219-55A datasheet, BUK9219-55A pinout, BUK9219-55A application, or BUK9219-55A equivalent, this device supports thermally demanding automotive environments, enables direct microcontroller gate drive without level shifting, and provides robust unclamped avalanche energy handling (120 mJ).
Technical Context
This MOSFET uses TrenchMOS technology to achieve low on-resistance with logic-level gate drive compatibility (VGS(th) = 1.0–2.0 V at 25 °C). Its thermal design centers on mounting-base cooling, with Rth(j-mb) = 1.3 K/W enabling high-power dissipation when soldered to a PCB copper plane.
The device features integrated source-drain diode (VSD = 0.85 V at 25 A), fast switching (td(off) = 400 ns), and rugged avalanche capability-critical for inductive load commutation in automotive body control modules and motor drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 55 V - Maximum drain-source blocking voltage for 12 V/24 V automotive systems with transient margin. |
| ID (continuous) | 55 A at Tmb = 25 °C - Supports high-current DC loads like radiator fans or seat motors without external heatsink under adequate PCB copper. |
| RDS(on) | 20 mΩ at VGS = 4.5 V, Tj = 25 °C - Enables <1 W conduction loss at 5 A, reducing thermal stress in compact layouts. |
| EAS | 120 mJ unclamped avalanche energy - Withstands inductive kickback from solenoids or brushed DC motors without failure. |
| Tj(max) | 175 °C - Qualified for under-hood applications where ambient temperatures exceed 125 °C. |
| Ciss | 2190 pF typical - Low input capacitance allows fast turn-on with modest gate drive strength (e.g., MCU GPIO + 10 Ω series resistor). |
| QG | ~60 nC (inferred from Figure 9 at VDD = 14 V) - Gate charge compatible with standard logic-level drivers for <1 µs switching transitions. |
Pinout & Package
Package: SOT428 (DPAK), plastic single-ended surface-mounted package with 3 leads (lead 1 cropped); mounting base (mb) electrically connected to drain for low-inductance thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Gate | Logic-level control input; threshold voltage 1.0–2.0 V enables direct drive from 3.3 V or 5 V MCUs. |
| 2 (D) | Drain | Main high-side or low-side power switch node; internally bonded to mounting base for thermal and electrical connection. |
| 3 (S) | Source | Power return path; referenced to system ground in low-side configuration or to load in high-side layout. |
| Mounting base (mb) | Drain extension | Exposed copper pad soldered to PCB thermal plane; primary heat extraction path (Rth(j-mb) = 1.3 K/W). |
Key Features
| Feature | Design Value |
|---|---|
| Logic-level gate drive | Operates fully enhanced at VGS ≥ 4.5 V - eliminates need for gate driver ICs in 3.3 V/5 V controller designs. |
| AEC-Q101 qualification | Validated for automotive safety-critical functions including engine management and chassis control subsystems. |
| 175 °C junction rating | Enables operation in under-hood locations (e.g., battery disconnect units, HVAC actuators) without derating at high ambient. |
| Low RDS(on) × QG figure-of-merit | ~1.2 Ω·nC (20 mΩ × 60 nC) - balances conduction and switching losses for high-efficiency PWM motor control. |
| Integrated source-drain diode | VSD = 0.85 V at 25 A - provides freewheeling path for inductive loads, reducing external component count. |
Applications
| Automotive Body Control Module | 12 V/24 V DC Motor Driver |
|---|---|
Use Scenario: Switching power to door locks, window lifters, and mirror adjusters in modern vehicle BCMs. IC Role / Device Role / Timing Role: Low-side power switch controlling resistive and inductive loads with PWM dimming or position feedback. Use Value: AEC-Q101 compliance ensures reliability over 15-year vehicle lifetime; 175 °C rating accommodates sealed enclosure thermal buildup. |
Use Scenario: Driving brushed DC motors in HVAC blowers, power seats, and sunroof mechanisms. IC Role / Device Role / Timing Role: High-current H-bridge half-bridge element with fast turn-off (400 ns) to minimize shoot-through risk during direction reversal. Use Value: 120 mJ avalanche energy withstands back-EMF spikes during abrupt motor stop; 20 mΩ RDS(on) limits I²R heating at stall current. |
| LED Headlamp Power Switch | Industrial Solenoid Actuator |
Use Scenario: PWM-controlled high-brightness LED arrays in adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: High-side or low-side constant-current switch operating at 100–1000 Hz with precise duty-cycle control. Use Value: Low gate charge (≈60 nC) enables clean edge transitions at high frequency; low Ciss minimizes driver loading and EMI. |
Use Scenario: Controlling hydraulic or pneumatic solenoid valves in agricultural machinery and commercial vehicle braking systems. IC Role / Device Role / Timing Role: Robust power switch handling repetitive inductive transients during valve cycling. Use Value: Unclamped avalanche rating (120 mJ) absorbs energy from 49 A inductive current decay without snubber circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel logic-level power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N4F7AG | 40 V VDS, 220 A pulsed, 3.7 mΩ RDS(on) at 10 V - higher current, lower RDS(on), but not AEC-Q101 qualified. | Targeted at industrial motor drives, not automotive-critical systems. | Select only for non-automotive 12 V applications requiring higher peak current and lower conduction loss. |
| IRF3205PBF | 55 V VDS, 110 A pulsed, 8 mΩ RDS(on) at 10 V - no logic-level drive (VGS(th) = 2–4 V), requires 10 V gate drive. | Suitable for legacy 5 V logic systems with gate driver support; lacks AEC-Q101 and 175 °C rating. | Choose only if existing 10 V gate infrastructure exists and automotive qualification is not required. |
Compared with STL220N4F7AG and IRF3205PBF, the BUK9219-55A uniquely combines AEC-Q101 qualification, true logic-level operation (4.5 V drive), and 175 °C capability - making it the only drop-in solution for new automotive designs requiring functional safety and thermal resilience without gate boosting.
Availability
BUK9219-55A is available at Aetrix Electronics and suitable for automotive body control modules, 12 V/24 V DC motor drivers, and LED headlamp power switching requiring stable component supply across multi-year production cycles.
Supply support for BUK9219-55A 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
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BUK9219-55A belongs to Nexperia's TrenchMOS automotive-qualified power MOSFET family, engineered specifically for robust, high-current switching in thermally constrained automotive environments where reliability and AEC-Q101 compliance are mandatory.
FAQ
Is BUK9219-55A suitable for high-side switching configurations?
Yes - its 55 V VDS rating and 175 °C junction temperature support high-side use in 24 V systems. The mounting base is tied to drain, so thermal design must isolate the base from ground planes. Gate drive requires a floating or bootstrap circuit to maintain VGS ≥ 4.5 V relative to source potential.
What is the maximum safe continuous current at 100 °C mounting base temperature?
Per Figure 1 in the datasheet, normalized ID drops to ~65% at Tmb = 100 °C. With rated 55 A at 25 °C, the derated continuous current is approximately 36 A - matching the datasheet's limiting value table (ID = 38 A at Tmb = 100 °C, VGS = 5 V).
Does BUK9219-55A require an external flyback diode when driving inductive loads?
No - it integrates a source-drain diode with VSD = 0.85 V at 25 A and trr = 51 ns. This diode is rated for continuous 55 A and peak 219 A, making it suitable for freewheeling in most automotive solenoid and motor applications without external components.
How does the 1.3 K/W junction-to-mounting-base thermal resistance impact PCB layout?
This low Rth(j-mb) demands a large, low-thermal-resistance copper pour (≥ 200 mm², 2 oz Cu) directly under the mounting base. Thermal vias (≥ 8× 0.3 mm diameter) to inner ground/power planes are recommended to sustain 55 A continuous current without exceeding 175 °C junction temperature.
BUK9219-55A,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- TrenchMOS™
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 55 V
- Current - Continuous Drain (Id) @ 25°C:
- 55A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 17.6mOhm @ 25A, 10V
- Vgs(th) (Max) @ Id:
- 2V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- ±10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 2920 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 114W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
BUK9219-55A,118 FAQ
1.How can I place an order for BUK9219-55A,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK9219-55A,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 BUK9219-55A,118 reliable?
The price and inventory of BUK9219-55A,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9219-55A,118 is usually 5 days.
3.What payment methods are accepted for BUK9219-55A,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9219-55A,118 transactions.
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4.How is shipping managed for BUK9219-55A,118?
BUK9219-55A,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK9219-55A,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 BUK9219-55A,118?
For technical support, including BUK9219-55A,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9219-55A,118 requirements.
6.How does Aetrix verify that BUK9219-55A,118 is sourced from the original manufacturer or authorized distributors?
All BUK9219-55A,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 BUK9219-55A,118 meets industry standards.
7.What is the process for return or replacement of BUK9219-55A,118?
All BUK9219-55A,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9219-55A,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 BUK9219-55A,118 part is unused and in its original packaging.
Return procedure for BUK9219-55A,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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