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NXP Semiconductors BUK9832-55A,115
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- Part No.:
- BUK9832-55A,115
- Manufacturer:
- NXP Semiconductors
- Category:
- FETs, MOSFETs
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
BUK9832-55A,115.pdf
- Description:
- MOSFET N-CH 55V 12A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:2,661
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Product details
Overview
BUK9832-55A from Nexperia is an AEC-Q101-qualified N-channel TrenchMOS logic-level power FET in SOT223 (SC-73) package, rated for 55 V drain-source voltage, 12 A continuous drain current at 25 °C, and 36 mΩ RDS(on) at VGS = 4.5 V and Tj = 25 °C. It serves as a robust low-side switch in automotive 12 V/24 V load control circuits driving lamps, solenoids, and small motors.
For engineers reviewing the BUK9832-55A datasheet, BUK9832-55A pinout, BUK9832-55A application, or BUK9832-55A equivalent, key selection criteria include logic-level gate drive compatibility (VGS(th) = 1–2 V), avalanche ruggedness (100 mJ), thermal resistance (Rth(j-sp) = 15 K/W), and AEC-Q101 qualification for automotive critical systems.
Technical Context
This device uses TrenchMOS technology to achieve low on-state resistance with stable threshold voltage across temperature (VGS(th) = 0.6 V min at 150 °C). Its gate threshold is optimized for direct interface with 3.3 V and 5 V microcontrollers without level-shifting circuitry.
The dual-drain configuration (Pins 2 and 4) enhances thermal dissipation and current handling in surface-mount applications. Avalanche energy rating (100 mJ, unclamped) supports inductive load switching without external snubbers in many automotive implementations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 55 V - Maximum blocking voltage compatible with 24 V automotive systems including load-dump transients. |
| ID (continuous) | 12 A at Tsp = 25 °C - Supports medium-power loads like HVAC actuators or headlight relays without heatsink. |
| RDS(on) | 36 mΩ max at VGS = 4.5 V, Tj = 25 °C - Enables <1 W conduction loss at 5 A, reducing thermal design burden. |
| VGS(th) | 1.0–2.0 V - Ensures reliable turn-on with standard 3.3 V or 5 V logic outputs, eliminating need for gate drivers. |
| EDS(AL)S | 100 mJ - Withstands single-event inductive energy spikes from solenoids or motor windings without failure. |
| Rth(j-sp) | 15 K/W - Enables direct thermal coupling to PCB copper pour for efficient heat transfer in space-constrained modules. |
| QG | ~30 nC typical - Low gate charge allows fast switching (td(on) = 14 ns, tf = 68 ns) with minimal driver power 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 | Control input requiring ≤2 V threshold; low Ciss (1195–1594 pF) minimizes driver loading. |
| 2 | Drain | Main high-side current path; electrically tied to Pin 4 for parallel current sharing and improved thermal spreading. |
| 3 | Source | Power return node; connects directly to ground plane; hosts body diode cathode for freewheeling. |
| 4 | Drain | Second drain terminal - must be connected to same net as Pin 2 to maintain rated current and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive safety-critical applications including engine control, lighting, and chassis systems. |
| Logic-level gate drive | Operates fully enhanced with 4.5 V gate drive - compatible with standard MCU GPIOs without external level shifters. |
| Low RDS(on) at 4.5 V | 36 mΩ max enables high-efficiency switching in battery-powered and thermally constrained modules. |
| Dual-drain thermal design | Pins 2 and 4 provide redundant drain connections to maximize PCB copper area utilization for heat dissipation. |
| Unclamped avalanche rating | 100 mJ energy tolerance allows safe operation with inductive loads without mandatory external clamping diodes. |
Applications
| Automotive Lighting Control | Engine Management Actuators |
|---|---|
|
Use Scenario: Switching 12 V halogen or LED headlamps in modern vehicle lighting modules. IC Role / Device Role / Timing Role: Low-side power switch controlling lamp current with PWM dimming capability. Use Value: Logic-level gate enables direct MCU control; 36 mΩ RDS(on) limits self-heating during continuous operation. |
Use Scenario: Driving fuel injector solenoids or idle air control valves in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: High-reliability power switch handling repetitive inductive switching at up to 1 kHz. Use Value: 100 mJ avalanche energy absorbs back-EMF without snubber components; AEC-Q101 ensures long-term field reliability. |
| Body Electronics Load Management | Commercial Vehicle 24 V Systems |
|
Use Scenario: Controlling door locks, window lift motors, and seat adjustment mechanisms in passenger vehicles. IC Role / Device Role / Timing Role: Medium-current (≤10 A), duty-cycled load switch interfaced via CAN/LIN gateway MCUs. Use Value: Dual-drain SOT223 layout improves thermal margin on compact PCBs; VGS(th) stability over -40 to 150 °C ensures cold-cranking operation. |
Use Scenario: Power distribution in trucks, buses, and agricultural equipment using 24 V nominal systems. IC Role / Device Role / Timing Role: Robust main power switch for auxiliary systems such as cab heaters or trailer lighting. Use Value: 55 V VDS rating accommodates 24 V load-dump transients up to 40 V; Rth(j-sp) = 15 K/W supports conduction-cooled designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel logic-level power FET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N4F7AG | 40 V VDS, 220 A ID, TO-263 package, RDS(on) = 1.7 mΩ @ 10 V - higher current, lower voltage, larger footprint. | Targeted at high-power industrial inverters; not AEC-Q101 qualified; unsuitable for automotive 55 V transient environments. | Select only for non-automotive 40 V systems requiring >100 A capacity and active cooling. |
| IRLR024NPBF | 55 V VDS, 13 A ID, TO-220AB package, RDS(on) = 45 mΩ @ 5 V - similar voltage/current but through-hole, no AEC-Q101 rating. | General-purpose industrial switching; lacks automotive qualification and SOT223 thermal advantages. | Use where board-level rework is acceptable and AEC compliance is not required; avoid in new automotive designs. |
Compared with STL220N4F7AG and IRLR024NPBF, the BUK9832-55A uniquely combines AEC-Q101 qualification, SOT223 surface-mount thermal efficiency, and guaranteed 4.5 V logic-level turn-on - making it the only drop-in solution for space-constrained, safety-critical 12/24 V automotive load switches.
Availability
BUK9832-55A is available at Aetrix Electronics and suitable for automotive lighting control, engine management actuators, and body electronics load management requiring stable component supply and long-term lifecycle support.
Supply support for BUK9832-55A 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 specializing in high-volume, high-reliability discrete and logic devices, with leadership in automotive-grade MOSFETs and ESD protection.
The BUK9832-55A belongs to Nexperia's TrenchMOS logic-level FET product line, engineered specifically for AEC-Q101-compliant automotive power switching where low gate drive voltage, avalanche robustness, and thermal efficiency are essential.
FAQ
What is the maximum continuous drain current rating for BUK9832-55A at 100 °C solder point temperature?
The BUK9832-55A supports 7 A continuous drain current at Tsp = 100 °C, as specified in Table 4 of the datasheet. This derating reflects thermal limitations of the SOT223 package under elevated ambient conditions and must be accounted for in thermal design. The full 12 A rating applies only at Tsp = 25 °C.
Does BUK9832-55A require a gate resistor for safe switching in automotive applications?
While not strictly required, a series gate resistor (typically 10–47 Ω) is recommended for BUK9832-55A to control dV/dt and prevent parasitic oscillation during fast switching into inductive loads. The device's low QG (~30 nC) makes it sensitive to ringing without proper gate drive impedance matching.
Is BUK9832-55A pin-compatible with other SOT223 MOSFETs like BUK9Y11-55B?
No - BUK9832-55A has a unique 4-pin SOT223 pinout (G-D-S-D), whereas BUK9Y11-55B uses a standard 3-pin SOT223 (G-D-S). Pin 4 on BUK9832-55A is a second drain connection and must be routed to the same net as Pin 2; incorrect handling will compromise current rating and thermal performance.
Can BUK9832-55A be used in 48 V mild-hybrid automotive systems?
No - BUK9832-55A is rated for 55 V VDS, which does not provide sufficient margin for 48 V system transients (e.g., ISO 16750-2 load dump peaks up to 60 V). It is qualified only for 12 V and 24 V automotive architectures per its AEC-Q101 scope and limiting values table.
What is the typical reverse recovery time of the body diode in BUK9832-55A?
The BUK9832-55A body diode exhibits a typical reverse recovery time (trr) of 51 ns under conditions of IS = 20 A, dIS/dt = −100 A/µs, VGS = −10 V, VDS = 30 V, and Tj = 25 °C (Table 6). This fast recovery supports efficient PWM-based inductive load control with minimal switching loss.
BUK9832-55A,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- TrenchMOS™
- Package/Case:
- TO-261-4, TO-261AA
- 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:
- 12A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 29mOhm @ 8A, 10V
- Vgs(th) (Max) @ Id:
- 2V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- ±10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1594 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:
- SC-73
BUK9832-55A,115 FAQ
1.How can I place an order for BUK9832-55A,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK9832-55A,115 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 BUK9832-55A,115 reliable?
The price and inventory of BUK9832-55A,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9832-55A,115 is usually 5 days.
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BUK9832-55A,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK9832-55A,115 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 BUK9832-55A,115?
For technical support, including BUK9832-55A,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9832-55A,115 requirements.
6.How does Aetrix verify that BUK9832-55A,115 is sourced from the original manufacturer or authorized distributors?
All BUK9832-55A,115 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 BUK9832-55A,115 meets industry standards.
7.What is the process for return or replacement of BUK9832-55A,115?
All BUK9832-55A,115 units undergo pre-shipment inspection (PSI). If there is an issue with BUK9832-55A,115, 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 BUK9832-55A,115 part is unused and in its original packaging.
Return procedure for BUK9832-55A,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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