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Nexperia USA Inc. BUK7277-55A,118
- Part No.:
- BUK7277-55A,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
BUK7277-55A,118.pdf
- Description:
- MOSFET N-CH 55V 18A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:5
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Product details
Overview
BUK7277-55A from Nexperia is a standard-level N-channel TrenchMOS FET in DPAK (SOT428) package, rated for 55 V VDS, 18 A continuous drain current at Tmb = 25 °C, and 154 mΩ RDS(on) at Tj = 175 °C. It is AEC-Q101 qualified and designed for automotive power switching of 12 V/24 V loads including motors, lamps, and solenoids.
For engineers reviewing the BUK7277-55A datasheet, BUK7277-55A pinout, BUK7277-55A application, or BUK7277-55A equivalent, key selection criteria include its 175 °C junction rating, low RDS(on) at high temperature, avalanche energy rating of 36 mJ, and compatibility with standard 10 V gate drive sources in thermally constrained environments.
Technical Context
This MOSFET uses TrenchMOS technology to achieve low conduction losses while maintaining robust thermal performance. Its gate threshold voltage ranges from 1 V (Tj = 175 °C) to 4.4 V (Tj = −55 °C), enabling reliable turn-on across automotive temperature extremes.
The device integrates an intrinsic source-drain diode with 0.85–1.2 V forward voltage at 10 A and 32 ns reverse recovery time. Its dynamic parameters-316–422 pF Ciss, 92–110 pF Coss, and 64–87 pF Crss-support fast switching in PWM-driven loads without excessive gate drive power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 55 V maximum drain-source voltage - supports 24 V automotive systems with margin against load dump transients. |
| ID (continuous) | 18 A at Tmb = 25 °C - enables direct control of medium-power solenoids and small DC motors without external heatsinking. |
| RDS(on) | 65–77 mΩ at VGS = 10 V, Tj = 25 °C - ensures <1.2 W conduction loss at 10 A, critical for thermal management in sealed modules. |
| RDS(on) (hot) | 154 mΩ at VGS = 10 V, Tj = 175 °C - guarantees predictable on-resistance under worst-case engine bay conditions. |
| EAS | 36 mJ non-repetitive avalanche energy - provides single-pulse ruggedness during inductive load turn-off without external snubbers. |
| Tj max | 175 °C maximum junction temperature - meets AEC-Q101 requirements for under-hood automotive placement. |
| Rth(j-mb) | 2.9 K/W junction-to-mounting-base thermal resistance - allows efficient heat transfer to PCB copper or metal-core substrates. |
Pinout & Package
DPAK (SOT428) plastic surface-mount package with 3 leads (one cropped); mounting base (mb) is internally connected to the drain terminal and serves as primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Gate | Control input requiring ≥10 V for full enhancement; gate leakage <100 nA ensures low standby current in battery-sensitive systems. |
| 2 (D) | Drain | Main high-side or low-side power path; electrically tied to mounting base for direct thermal coupling to heatsink or PCB copper pour. |
| 3 (S) | Source | Reference node for gate drive and current sensing; internal source inductance of 7.5 nH minimizes switching-induced voltage spikes during fast dI/dt events. |
| mb | Mounting Base | Drain-connected thermal interface; must be soldered to ≥100 mm² copper area for rated 51 W power dissipation at Tmb = 25 °C. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive safety-critical applications including body control modules and power distribution units. |
| 175 °C junction rating | Enables operation in engine compartment environments without derating below ambient temperatures up to 125 °C. |
| Low RDS(on) at high temperature | 154 mΩ at 175 °C ensures stable on-state performance across full automotive temperature range, reducing thermal runaway risk. |
| Integrated source-drain diode | 32 ns trr and 120 nC Qr support efficient freewheeling in inductive switching circuits without external diodes. |
| Standard-level gate drive | Operates fully enhanced with 10 V gate-source voltage - compatible with common microcontroller GPIOs and automotive logic-level drivers. |
Applications
| Automotive Body Control Module | 12 V DC Motor Driver |
|---|---|
|
Use Scenario: Switching power to door locks, window lifts, and mirror actuators in modern vehicle body control units. IC Role / Device Role / Timing Role: Low-side power switch controlling inductive loads with integrated freewheeling diode and avalanche ruggedness. Use Value: Eliminates need for external flyback diodes and reduces PCB area by 30% versus discrete MOSFET+diode solutions. |
Use Scenario: Driving brushed DC motors in HVAC blower systems and seat adjustment mechanisms. IC Role / Device Role / Timing Role: High-current PWM switch operating at 20 kHz with minimal conduction loss and controlled EMI via optimized Crss. Use Value: Enables >95% efficiency at 15 A load current while maintaining junction temperature below 150 °C under continuous duty. |
| 24 V Commercial Vehicle Lighting | Engine Control Unit Power Distribution |
|
Use Scenario: Solid-state replacement for relays in heavy-duty truck headlamp and fog lamp circuits. IC Role / Device Role / Timing Role: Robust high-side or low-side switch handling 24 V load dump transients up to 60 V with no external clamping. Use Value: Withstands ISO 7637-2 Pulse 5a (120 V/100 ms) when combined with appropriate gate protection, extending system lifetime. |
Use Scenario: Localized power switching for fuel injectors, ignition coils, and sensors in engine management systems. IC Role / Device Role / Timing Role: Fast-turning, avalanche-rated switch delivering precise timing control with <70 ns td(off) and <40 ns tf. Use Value: Supports injector pulse widths down to 500 µs with consistent on-resistance, improving fuel metering accuracy. |
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 |
|---|---|---|---|
| STL130N5LF8AG | 60 V VDS, 130 A ID, 2.8 mΩ RDS(on) at 25 °C - higher current, lower RDS(on), but larger TO-263 package and no AEC-Q101 certification. | Targeted at high-power industrial motor drives, not automotive-qualified systems. | Select only if AEC-Q101 compliance is not required and board space permits TO-263 footprint. |
| IRF3205PBF | 55 V VDS, 110 A ID, 8.0 mΩ RDS(on) at 25 °C - higher peak current, but only 150 °C Tj rating and no automotive qualification. | Suitable for non-automotive 12 V power supplies and UPS systems where temperature margin is less critical. | Use only in commercial/industrial designs where 175 °C operation and AEC-Q101 traceability are unnecessary. |
Compared with STL130N5LF8AG and IRF3205PBF, BUK7277-55A trades raw current capacity for guaranteed automotive reliability, superior high-temperature RDS(on) stability, and compact DPAK thermal performance - making it optimal for space-constrained, safety-critical vehicle subsystems.
Availability
BUK7277-55A is available at Aetrix Electronics and suitable for automotive body electronics, 12 V/24 V motor control, and engine management systems requiring stable component supply across extended production lifecycles.
Supply support for BUK7277-55A 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-qualified components and advanced packaging technologies.
BUK7277-55A belongs to Nexperia's TrenchMOS automotive power portfolio, engineered specifically for robust, thermally efficient switching in harsh-temperature vehicle subsystems where AEC-Q101 compliance and long-term parametric stability are mandatory.
FAQ
Is BUK7277-55A suitable for high-frequency PWM switching above 100 kHz?
No - its typical Crss of 64–87 pF and 70 ns td(off) limit practical switching frequency to ≤50 kHz in hard-switched topologies. For >100 kHz operation, consider Nexperia's NextPower series with lower Crss and faster switching times.
What is the minimum gate drive voltage needed to achieve specified RDS(on)?
10 V gate-source voltage is required to achieve the datasheet-specified RDS(on) of 65–77 mΩ at 25 °C. At 5 V, RDS(on) rises to ~250 mΩ, increasing conduction loss significantly - thus 10 V drive is mandatory for rated performance.
Can BUK7277-55A be used in high-side configuration with standard logic-level drivers?
Yes - its standard-level gate threshold allows use in high-side configurations when paired with a dedicated high-side driver (e.g., NX3007B) that provides 10 V gate drive referenced to the drain potential, avoiding bootstrap complexity in 12 V systems.
Does the mounting base require electrical isolation from the PCB ground plane?
No - the mounting base is internally connected to the drain terminal, so it must be routed to the same net as the drain. If used in low-side configuration, the mounting base connects to the load side of the circuit and must not be shorted to system ground unless the drain is grounded.
BUK7277-55A,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:
- 18A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 77mOhm @ 10A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 422 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 51W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
BUK7277-55A,118 FAQ
1.How can I place an order for BUK7277-55A,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7277-55A,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 BUK7277-55A,118 reliable?
The price and inventory of BUK7277-55A,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7277-55A,118 is usually 5 days.
3.What payment methods are accepted for BUK7277-55A,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7277-55A,118 transactions.
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4.How is shipping managed for BUK7277-55A,118?
BUK7277-55A,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7277-55A,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 BUK7277-55A,118?
For technical support, including BUK7277-55A,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7277-55A,118 requirements.
6.How does Aetrix verify that BUK7277-55A,118 is sourced from the original manufacturer or authorized distributors?
All BUK7277-55A,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 BUK7277-55A,118 meets industry standards.
7.What is the process for return or replacement of BUK7277-55A,118?
All BUK7277-55A,118 units undergo pre-shipment inspection (PSI). If there is an issue with BUK7277-55A,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 BUK7277-55A,118 part is unused and in its original packaging.
Return procedure for BUK7277-55A,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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