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NXP Semiconductors BUK7528-55,127
- Part No.:
- BUK7528-55,127
- Manufacturer:
- NXP Semiconductors
- Category:
- FETs, MOSFETs
- Package:
- TO-220-3
- Datasheet:
-
BUK7528-55,127.pdf
- Description:
- MOSFET N-CH 55V 40A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,201
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Product details
Overview
BUK7528-55 from NXP Semiconductors (formerly Philips) is an N-channel enhancement-mode TrenchMOS™ power transistor in TO220AB package, rated for 55 V drain-source voltage, 40 A DC drain current at 25 °C, and 28 mΩ RDS(ON) at VGS = 10 V. It integrates ESD protection up to 2 kV and is designed for automotive and general-purpose switching applications such as motor control and power supply load switching.
For engineers reviewing the BUK7528-55 datasheet, BUK7528-55 pinout, BUK7528-55 application, or BUK7528-55 equivalent, key selection criteria include its standard-level gate drive compatibility (10 V), low on-resistance at elevated temperature, avalanche energy rating of 70 mJ, and thermal resistance junction-to-mounting-base of 1.56 K/W - all critical for thermally constrained 12 V/24 V automotive systems.
Technical Context
The BUK7528-55 employs trench-gate MOSFET technology to achieve low RDS(ON) while maintaining robust avalanche capability (70 mJ unclamped inductive turn-off). Its gate threshold voltage ranges from 2.0 V to 4.0 V at 25 °C, enabling reliable turn-on with standard logic-level drivers.
It features integral body diode with 40 A continuous reverse current rating, 0.95–1.2 V forward voltage at 25 A, and 41 ns reverse recovery time. Thermal derating follows a defined curve: ID drops to 28 A at 100 °C mounting base temperature, and power dissipation is linearly derated above 25 °C with Rth j-mb = 1.56 K/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 55 V - maximum blocking voltage compatible with 42 V automotive systems and 36 V industrial rails |
| ID (DC) | 40 A at Tmb = 25 °C - supports high-current loads like starter relays or fan motors without external heatsink at ambient conditions |
| RDS(ON) | 28 mΩ max at VGS = 10 V, Tj = 25 °C - ensures <1.1 W conduction loss at 20 A, reducing thermal stress |
| EAS | 70 mJ unclamped avalanche energy - enables robust operation in inductive switching circuits without snubber networks |
| VGS(th) | 2.0–4.0 V at Tj = 25 °C - guarantees turn-on with 3.3 V or 5 V microcontroller GPIOs when margin is applied |
| ESD Rating | 2 kV HBM - eliminates need for external ESD protection in board-level handling and assembly |
| Ciss | 1000–1300 pF - determines gate drive strength requirement; ~12 nC total gate charge at VDS = 44 V supports fast switching with ≤10 Ω driver |
Pinout & Package
Package: TO220AB (SOT78), plastic envelope with metal tab electrically connected to drain; net mass 2 g; UL94 V0 epoxy; mounting base thermal interface optimized for heatsink attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Gate | Control terminal requiring ≤16 V absolute max gate-source voltage; sensitive to ESD; drives channel conduction |
| 2 | Drain | Main high-side current path; internally bonded to metal tab - must be electrically isolated from heatsink unless circuit reference permits |
| 3 | Source | Power return path and gate reference node; low-inductance source lead (7.5 nH) minimizes switching oscillation |
| Tab | Drain | Primary thermal path to heatsink; same potential as Pin 2 - critical for thermal management and isolation planning |
Key Features
| Feature | Design Value |
|---|---|
| TrenchMOS™ technology | Enables 28 mΩ RDS(ON) in TO220AB, reducing conduction losses by >35% vs. planar MOSFETs of same package |
| Integral zener-protected gate | Provides 2 kV HBM ESD immunity without external TVS, simplifying layout and improving field reliability |
| Unclamped inductive avalanche rating | 70 mJ energy tolerance allows safe operation in relay/coil driving without clamping diodes in many designs |
| Optimized body diode | 41 ns trr and 0.16 µC Qrr support synchronous rectification and freewheeling in DC-DC converters |
| Thermal resistance Rth j-mb | 1.56 K/W enables 96 W dissipation with ≤150 K temperature rise from mounting base to junction - suitable for forced-air or passive heatsinks |
Applications
| Automotive Door Lock Actuator | Industrial 24 V DC Power Distribution |
|---|---|
Use Scenario: High-reliability latching solenoid control in vehicle door modules, operating across -40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Low-side switch driving inductive load with integrated flyback path and ESD-hardened gate. Use Value: Eliminates external flyback diode and gate protection components; 70 mJ avalanche rating absorbs solenoid turn-off energy without failure. | Use Scenario: Remote-controlled power switching for PLC I/O modules and sensor power rails in factory automation cabinets. IC Role / Device Role / Timing Role: Solid-state replacement for electromechanical relays, delivering 40 A continuous load switching with zero contact wear. Use Value: 28 mΩ RDS(ON) limits power loss to <0.5 W at 4 A, enabling compact PCB layout without active cooling. |
| 12 V Automotive Fan Motor Control | LED Streetlight Driver Output Stage |
Use Scenario: PWM-controlled radiator fan in passenger vehicles, subject to load dump transients and vibration. IC Role / Device Role / Timing Role: High-side or low-side PWM switch with fast turn-on (13 ns delay) and controlled fall time (20–27 ns). Use Value: 1000–1300 pF Ciss and 12 nC QG allow clean 20 kHz PWM switching with minimal gate drive power. | Use Scenario: Constant-current output stage in outdoor LED drivers exposed to wide temperature swings and lightning-induced surges. IC Role / Device Role / Timing Role: Primary switching element in buck or boost converter output stage, handling repetitive 40 A peak currents. Use Value: 175 °C max junction temperature and 2 kV ESD rating ensure long-term operation in unventilated, high-humidity enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP40NF55 | 55 V VDS, 40 A ID, 28 mΩ RDS(ON), but TO220FP (full-pack) package with insulated tab; higher Rth j-a (65 K/W) | Requires insulated mounting hardware; less efficient thermal transfer than BUK7528-55's direct-tab drain connection | Select when electrical isolation between tab and heatsink is mandatory; avoid if thermal performance is primary concern |
| IRFZ44NPBF | 55 V VDS, 49 A ID, 28 mΩ RDS(ON), but no specified avalanche rating; 1.5 kV ESD rating (vs. 2 kV) | Lacks documented unclamped avalanche capability; lower ESD margin increases risk in automotive assembly environments | Acceptable for non-automotive, non-inductive loads where cost is critical; not recommended for solenoid or motor switching |
Compared with STP40NF55 and IRFZ44NPBF, the BUK7528-55 delivers superior thermal coupling via its non-isolated TO220AB tab, verified 70 mJ avalanche robustness for inductive loads, and higher ESD immunity - making it the preferred choice for automotive-grade reliability in thermally demanding applications.
Availability
BUK7528-55 is available at Aetrix Electronics and suitable for automotive body electronics, industrial power distribution, and LED lighting systems requiring stable component supply, long lifecycle support, and AEC-Q101-aligned manufacturing traceability.
Supply support for BUK7528-55 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' semiconductor division.
The BUK7528-55 belongs to NXP's TrenchMOS™ standard-level power MOSFET product line, engineered specifically for cost-sensitive, high-reliability 12 V/24 V automotive and industrial switching applications where robustness, thermal efficiency, and gate-drive simplicity are essential.
FAQ
What is the maximum continuous drain current for BUK7528-55 at 100 °C mounting base temperature?
The BUK7528-55 supports 28 A continuous drain current at Tmb = 100 °C, as specified in the Limiting Values table. This derating reflects thermal constraints of the TO220AB package and ensures safe operation within its 175 °C maximum junction temperature limit. The BUK7528-55 maintains stable RDS(ON) performance across this range due to its trench-gate structure.
Does BUK7528-55 require external gate protection against ESD?
No, the BUK7528-55 incorporates integral zener diodes providing 2 kV human-body-model ESD protection on all pins, eliminating the need for external gate protection components in most automotive and industrial applications. This feature is explicitly confirmed in the General Description and ESD Limiting Value sections of the Philips datasheet for BUK7528-55.
Can BUK7528-55 be used as a direct replacement for BUK7528-55A or BUK7528-55B variants?
The BUK7528-55 is the base part number documented in the Philips specification; no official variants (e.g., BUK7528-55A/B) are referenced in the provided datasheet or NXP's current product documentation. Therefore, BUK7528-55 should be treated as the definitive version, and substitution with unlisted suffixes is not supported without verification of identical parametric and qualification data for BUK7528-55.
What is the typical reverse recovery time of the body diode in BUK7528-55?
The BUK7528-55 body diode has a typical reverse recovery time (trr) of 41 ns under conditions of IF = 40 A, -dIF/dt = 100 A/µs, VGS = -10 V, and VR = 30 V. This value is specified in the Reverse Diode Characteristics section and confirms suitability for medium-frequency switching applications such as 20–100 kHz DC-DC converters where fast freewheeling is required.
Is the metal tab of BUK7528-55 electrically isolated from the drain pin?
No - the metal tab of the BUK7528-55 is directly connected to the drain (Pin 2), as confirmed in both the Pin Configuration diagram and the Mechanical Data section. This internal connection makes electrical isolation between the tab and heatsink mandatory unless the heatsink is referenced to the drain potential, which impacts system grounding and safety design for BUK7528-55 installations.
BUK7528-55,127 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- 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:
- 40A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 28mOhm @ 20A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- ±16V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1300 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 96W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
BUK7528-55,127 FAQ
1.How can I place an order for BUK7528-55,127 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7528-55,127 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 BUK7528-55,127 reliable?
The price and inventory of BUK7528-55,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7528-55,127 is usually 5 days.
3.What payment methods are accepted for BUK7528-55,127?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7528-55,127 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7528-55,127?
BUK7528-55,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7528-55,127 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 BUK7528-55,127?
For technical support, including BUK7528-55,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7528-55,127 requirements.
6.How does Aetrix verify that BUK7528-55,127 is sourced from the original manufacturer or authorized distributors?
All BUK7528-55,127 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 BUK7528-55,127 meets industry standards.
7.What is the process for return or replacement of BUK7528-55,127?
All BUK7528-55,127 units undergo pre-shipment inspection (PSI). If there is an issue with BUK7528-55,127, 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 BUK7528-55,127 part is unused and in its original packaging.
Return procedure for BUK7528-55,127:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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