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Nexperia USA Inc. BUK78150-55A/CUF
- Part No.:
- BUK78150-55A/CUF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
BUK78150-55A/CUF.pdf
- Description:
- MOSFET N-CH 55V 5.5A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:3,789
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Product details
Overview
BUK78150-55A/CUF from Nexperia is a standard-level N-channel TrenchMOS FET in SOT223 (SC-73) package, rated for 55 V drain-source voltage, 5.5 A continuous drain current at 25 °C, and 278 mΩ RDS(on) at 150 °C junction temperature. It is AEC-Q101 qualified for automotive critical power switching applications including 12 V/24 V motor, lamp, and solenoid control.
For engineers reviewing the BUK78150-55A datasheet, BUK78150-55A pinout, BUK78150-55A application, or BUK78150-55A equivalent, this device offers verified thermal resistance (Rth(j-sp) = 15 K/W), unclamped avalanche energy rating (25 mJ), and gate drive compatibility with standard 10 V logic sources - key selection criteria for robust automotive load switching.
Technical Context
This MOSFET employs TrenchMOS technology to achieve low conduction losses and stable threshold voltage across temperature (VGS(th) = 1–4.4 V). Its dual-drain pin configuration (Pins 2 & 4) enhances thermal performance by increasing heatsink contact area in the SOT223 package.
The device supports unclamped inductive switching with defined avalanche ruggedness (EDS(AL)S = 25 mJ at ID = 5 A), and features low dynamic parameters: Ciss = 170–230 pF, td(on) = 3 ns, and tr = 26 ns - enabling efficient operation in medium-frequency switching circuits up to ~100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 55 V maximum - supports 24 V automotive systems with ≥130 % overvoltage margin against load dump transients. |
| ID (continuous) | 5.5 A at Tsp = 25 °C - enables direct driving of medium-power loads (e.g., 12 V/60 W lamps or 24 V/132 W solenoids) without external heatsinking. |
| RDS(on) | 128–150 mΩ at 25 °C / 278 mΩ at 150 °C - ensures <1 W conduction loss at 5 A, minimizing thermal stress in sealed enclosures. |
| EDS(AL)S | 25 mJ unclamped avalanche energy - provides single-pulse fault tolerance during inductive turn-off without external snubbers. |
| Rth(j-sp) | 15 K/W - allows direct PCB copper pour thermal coupling to improve power handling beyond ambient-limited ratings. |
| VGS(th) | 2–4 V typical at 25 °C - ensures reliable turn-on with standard 3.3 V or 5 V microcontroller GPIOs when used with appropriate gate drive design. |
| Ciss | 170–230 pF - balances switching speed and EMI; compatible with low-power gate drivers (e.g., TC4420) without excessive peak current demand. |
Pinout & Package
SOT223 (SC-73) plastic surface-mounted package with increased heatsink area and 4 leads; Pin 1 = Gate (G), Pins 2 & 4 = Drain (D), Pin 3 = Source (S).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Gate (G) | Control input; requires ≤20 V gate-source voltage; low gate charge (QG ≈ 6–10 nC typical) enables fast switching with minimal driver effort. |
| 2 | Drain (D) | Main high-side power path; electrically tied to Pin 4; dual-drain layout improves thermal spreading into PCB copper. |
| 3 | Source (S) | Power return node; referenced to system ground in low-side switch configurations; source-drain diode VSD = 0.85–1.2 V enables freewheeling in inductive loads. |
| 4 | Drain (D) | Second drain terminal - identical electrical node to Pin 2; used for enhanced thermal connection to heatsink or large copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability (temperature cycling, HTRB, uHAST) - suitable for under-hood and body-control module deployment. |
| TrenchMOS low RDS(on) | 128 mΩ typ. at 25 °C reduces conduction loss by >30 % vs. planar MOSFETs of same voltage class, lowering thermal design burden. |
| Standard-level gate drive | Turns on fully with 10 V VGS; compatible with legacy 12 V automotive logic and common microcontroller outputs via simple level-shifting. |
| Unclamped avalanche rating | 25 mJ energy absorption capability - eliminates need for external clamping diodes in relay or solenoid driver designs. |
| Dual-drain thermal enhancement | Pins 2 and 4 both connect to drain, doubling solder joint area for heat transfer - improves power derating by ~15 % vs. single-drain SOT223 variants. |
Applications
| Automotive Body Control Module | Industrial 24 V Solenoid Driver |
|---|---|
|
Use Scenario: Switching door locks, window lift motors, and interior lighting in modern vehicle BCMs. IC Role / Device Role / Timing Role: Low-side power switch controlling 12 V/24 V inductive and resistive loads with PWM dimming support. Use Value: AEC-Q101 qualification ensures long-term reliability in temperature-cycled environments; 278 mΩ RDS(on) at 150 °C maintains <1.2 W loss during sustained operation. |
Use Scenario: Driving pneumatic/hydraulic solenoids in factory automation panels and HVAC actuators. IC Role / Device Role / Timing Role: High-reliability discrete switch interfacing PLC outputs to 24 V DC solenoid coils. Use Value: 25 mJ avalanche energy rating absorbs inductive kickback without snubber components; dual-drain pins simplify thermal management on dense PCBs. |
| LED Headlamp Dimming Circuit | 12 V Automotive Fan Controller |
|
Use Scenario: PWM-controlled current regulation for adaptive LED headlamps requiring precise brightness control. IC Role / Device Role / Timing Role: Low-loss, fast-switching N-channel FET in high-side or low-side configuration with gate driver IC. Use Value: 26 ns rise time and 10 ns fall time enable clean 1–20 kHz PWM waveforms; low Ciss minimizes gate drive power consumption. |
Use Scenario: Speed-controlled radiator or cabin fans in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Medium-power load switch operated by MCU PWM output with integrated current sensing feedback. Use Value: 5.5 A continuous rating supports 12 V/66 W fan loads; Rth(j-sp) = 15 K/W allows direct mounting to aluminum chassis for passive cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel automotive power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP16NF55 | TO-220 package; higher RDS(on) (160 mΩ @ 25 °C); no AEC-Q101 qualification. | Requires external heatsink; not approved for automotive safety-critical modules. | Select only for cost-sensitive industrial use where qualification is not required. |
| IRFZ44NPBF | TO-220; 55 V/49 A rating but RDS(on) = 28 mΩ - significantly lower conduction loss but larger footprint and no automotive qualification. | Better for high-current non-automotive applications; lacks avalanche rating and thermal resistance data for SOT223-equivalent mounting. | Prefer when board space and thermal budget allow TO-220, and automotive compliance is unnecessary. |
Compared with STP16NF55 and IRFZ44NPBF, BUK78150-55A/CUF uniquely combines AEC-Q101 qualification, SOT223 surface-mount compatibility, and verified 25 mJ avalanche ruggedness - making it the only option among the three qualified for automotive body electronics without heatsink dependency.
Availability
BUK78150-55A/CUF is available at Aetrix Electronics and suitable for automotive body control modules, industrial 24 V solenoid drivers, and LED headlamp dimming circuits requiring stable component supply and long-term lifecycle assurance.
Supply support for BUK78150-55A/CUF 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified MOSFETs and ESD protection solutions.
BUK78150-55A belongs to Nexperia's TrenchMOS automotive power portfolio, engineered specifically for robust, thermally efficient 12 V/24 V load switching in space-constrained automotive ECUs and industrial controllers.
FAQ
Is BUK78150-55A/CUF suitable for high-side switching configurations?
No - BUK78150-55A is an N-channel MOSFET requiring gate voltage above source potential for conduction. In high-side applications, it must be paired with a dedicated high-side gate driver (e.g., NCV8405) to generate sufficient VGS. Its standard-level gate threshold (2–4 V) does not support direct 12 V rail-referenced drive without level shifting.
What is the maximum safe operating frequency for PWM switching with this FET?
Based on its dynamic characteristics (td(on) = 3 ns, tr = 26 ns, Ciss = 170–230 pF), BUK78150-55A supports clean PWM operation up to 100 kHz in low-inductance layouts. Above this, switching losses increase significantly; thermal derating and gate driver strength become limiting factors.
Does the "/CUF" suffix indicate a different specification than BUK78150-55A?
No - "/CUF" is Nexperia's internal tape-and-reel packaging code (carrier tape, 13-inch reel, 1000 pcs/reel) and does not alter electrical or thermal specifications. All parametric data, qualification status, and pinout remain identical to the base BUK78150-55A part number.
Can this MOSFET replace a mechanical relay in automotive applications?
Yes - BUK78150-55A is widely used as a solid-state relay replacement for 12 V/24 V resistive and inductive loads (e.g., horns, fuel pumps, seat heaters). Its 25 mJ avalanche rating handles inductive kickback, and AEC-Q101 qualification ensures >10-year operational life under automotive thermal and vibration stress.
BUK78150-55A/CUF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- TrenchMOS™
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 55 V
- Current - Continuous Drain (Id) @ 25°C:
- 5.5A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 150mOhm @ 5A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 230 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 8W (Tc)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223
BUK78150-55A/CUF FAQ
1.How can I place an order for BUK78150-55A/CUF through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK78150-55A/CUF 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 BUK78150-55A/CUF reliable?
The price and inventory of BUK78150-55A/CUF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK78150-55A/CUF is usually 5 days.
3.What payment methods are accepted for BUK78150-55A/CUF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK78150-55A/CUF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK78150-55A/CUF?
BUK78150-55A/CUF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK78150-55A/CUF 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 BUK78150-55A/CUF?
For technical support, including BUK78150-55A/CUF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK78150-55A/CUF requirements.
6.How does Aetrix verify that BUK78150-55A/CUF is sourced from the original manufacturer or authorized distributors?
All BUK78150-55A/CUF 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 BUK78150-55A/CUF meets industry standards.
7.What is the process for return or replacement of BUK78150-55A/CUF?
All BUK78150-55A/CUF units undergo pre-shipment inspection (PSI). If there is an issue with BUK78150-55A/CUF, 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 BUK78150-55A/CUF part is unused and in its original packaging.
Return procedure for BUK78150-55A/CUF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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