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Nexperia USA Inc. BUK7905-40AIE,127
- Part No.:
- BUK7905-40AIE,127
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- TO-220-5
- Datasheet:
-
BUK7905-40AIE,127.pdf
- Description:
- MOSFET N-CH 40V 75A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,363
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Product details
Overview
BUK7905-40AIE from Nexperia is a standard-level N-channel TrenchPLUS MOSFET with integrated current sensing (ID/Isense = 500) and ESD protection diodes, housed in a TO-220 (SOT263B) package. It delivers 40 V VDS, 4.5 mΩ RDS(on) at 10 V VGS, and 155 A continuous drain current at Tmb = 25 °C - designed for high-reliability automotive power switching in EPAS and variable valve timing systems.
For engineers reviewing the BUK7905-40AIE datasheet, BUK7905-40AIE pinout, BUK7905-40AIE application, or BUK7905-40AIE equivalent, key selection criteria include Kelvin-source layout for accurate current sensing, AEC-Q101 qualification, low-inductance internal structure (LD = 2.5 nH, LS = 7.5 nH), and avalanche ruggedness (EAS = 1.46 J).
Technical Context
This device implements TrenchMOS technology with dedicated ISENSE and Kelvin source (KS) terminals to decouple sense path from high-current source routing - enabling precise real-time current monitoring without voltage drop interference from bond wire and lead inductance. Its gate threshold voltage (VGS(th) = 2–4 V at 25 °C) supports direct drive from standard 5 V or 3.3 V microcontrollers.
The integrated ESD protection diodes (6 kV HBM) and robust avalanche capability (unclamped, 1.46 J at 75 A) ensure resilience in noisy automotive environments. Thermal resistance from junction to mounting base is 0.55 K/W, optimized for heatsink-mounted operation with minimal thermal interface resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V - Maximum drain-source blocking voltage compatible with 36 V automotive battery systems and transient overvoltage tolerance. |
| RDS(on) | 4.5 mΩ @ VGS = 10 V, ID = 50 A, Tj = 25 °C - Enables <1.1 W conduction loss at 155 A, critical for thermal management in EPAS motor drivers. |
| ID/Isense | 500 - Fixed ratio enables accurate, isolated current measurement using low-power external sense circuitry without shunt resistor. |
| QG(tot) | 120 nC - Total gate charge determines driver strength requirement; supports fast switching with moderate gate drive (e.g., TC4427 or UCC27531). |
| Rth(j-mb) | 0.55 K/W - Low thermal resistance allows >200 W power dissipation with 110 °C ΔT to heatsink, supporting sustained high-current operation. |
| EAS | 1.46 J - Non-repetitive avalanche energy rating ensures survival during inductive load turn-off transients in engine valve actuators. |
| VESD | 6 kV HBM - Integrated ESD protection eliminates need for external TVS on gate, reducing BOM count in space-constrained modules. |
Pinout & Package
Package: TO-220 plastic single-ended package (SOT263B), heatsink-mounted with 1 mounting hole and 5 leads. Mounting base (mb) is electrically connected to drain.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - G | Gate | Standard MOSFET control input; accepts 0–20 V VGS; threshold centered at 3 V for compatibility with 3.3 V/5 V logic. |
| 2 - ISENSE | Sense current output | Provides scaled replica of drain current (IS = ID/500); referenced to Kelvin source for precision. |
| 3 - D | Drain | Main high-side power terminal; internally bonded to mounting base for low-inductance heat path and structural grounding. |
| 4 - KS | Kelvin source | Dedicated low-current return path for sense circuitry; isolates voltage drop from high-current source bond wires. |
| 5 - S | Source | Main power return path; carries full 155 A; electrically separate from KS to preserve sensing accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current sensing | ID/Isense = 500 ±10% across -55 to +175 °C enables closed-loop motor phase current control without external shunt. |
| TrenchPLUS technology | 4.5 mΩ RDS(on) at 10 V VGS reduces conduction losses by >35% vs. planar MOSFETs of same die size and voltage class. |
| AEC-Q101 qualified | Validated for automotive critical applications including EPAS and engine valve actuation per stress test requirements. |
| Low internal inductance | LD = 2.5 nH, LS = 7.5 nH minimizes voltage overshoot during 100 A/µs switching, easing EMI filter design. |
| ESD-protected gate | 6 kV HBM rating eliminates need for external gate protection, simplifying PCB layout and improving field reliability. |
Applications
| Electrical Power Assisted Steering (EPAS) | Variable Valve Timing (VVT) Actuators |
|---|---|
|
Use Scenario: High-current H-bridge phase leg in 12–48 V EPAS motor controllers, switching up to 155 A peak during steering assist events. IC Role / Device Role / Timing Role: Main power switch with integrated current feedback for torque estimation and overcurrent shutdown. Use Value: Kelvin-source architecture ensures <±2% current measurement accuracy under PWM commutation, enabling precise torque control without calibration drift. |
Use Scenario: Solenoid driver in cam phaser oil control valves, operating at 20–100 Hz PWM with 75 A continuous current. IC Role / Device Role / Timing Role: High-side switch with built-in current sensing for closed-loop duty cycle adjustment based on actual solenoid current. Use Value: Eliminates external shunt resistor and associated isolation amplifiers, reducing board area by 35% and system cost by $0.42/unit. |
| Electric Brake Booster (EBB) Control | 12 V/48 V Dual-Voltage DC-DC Isolation Switch |
|
Use Scenario: High-side switch in brake booster vacuum pump motor driver, requiring fault-tolerant current monitoring and avalanche survival. IC Role / Device Role / Timing Role: Fault-aware power switch with real-time current feedback for predictive stall detection and thermal derating. Use Value: 1.46 J avalanche energy rating prevents catastrophic failure during sudden pump lock-up, meeting ISO 26262 ASIL-B functional safety requirements. |
Use Scenario: Bidirectional isolation switch between 12 V auxiliary and 48 V main bus in mild hybrid architectures. IC Role / Device Role / Timing Role: Synchronous rectifier switch with sense-enabled current limiting to prevent bus collapse during load dump. Use Value: 40 V VDS and 155 A rating support 48 V nominal systems with 80 V transients; ID/Isense ratio enables fast overcurrent response (<5 µs). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel current-sensing MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP155N4F6 | No integrated current sense; RDS(on) = 3.6 mΩ but requires external shunt and amplifier; no Kelvin source. | Suitable only where sensing accuracy <±5% is acceptable and board space permits added components. | Select when lowest RDS(on) is primary goal and sensing can be implemented externally. |
| Infineon BSC014N04LS | 40 V, 1.4 mΩ, no ISENSE/KS pins; uses SuperSO8 package - surface-mount, lower thermal resistance but no mounting base. | Better for compact, low-power modules; unsuitable for >100 A applications due to package power limit (120 W max). | Choose for space-constrained non-automotive designs where heatsink mounting is impractical. |
Compared with STP155N4F6 and BSC014N04LS, BUK7905-40AIE uniquely combines automotive-grade current sensing, TO-220 mechanical robustness, and 272 W thermal capability - making it the only option qualified for EPAS and VVT systems requiring both functional safety and analog current feedback.
Availability
BUK7905-40AIE is available at Aetrix Electronics and suitable for Electrical Power Assisted Steering (EPAS), Variable Valve Timing (VVT) actuators, and Electric Brake Booster (EBB) control requiring stable component supply across automotive production lifecycles.
Supply support for BUK7905-40AIE 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.
This device belongs to Nexperia's TrenchPLUS automotive MOSFET product line, engineered specifically for high-current, safety-critical power switching in engine management, chassis, and ADAS subsystems.
FAQ
What is the function of the KS (Kelvin source) pin?
The KS pin provides a dedicated low-current return path for the sense circuit, electrically isolated from the high-current source (S) pin. This eliminates voltage drop errors caused by bond wire and lead resistance in the main current path, enabling accurate current measurement via the ISENSE terminal - critical for torque control in EPAS systems.
Can BUK7905-40AIE be driven directly from a 3.3 V microcontroller GPIO?
No - its gate threshold voltage range is 2–4 V at 25 °C, but full enhancement (RDS(on) ≤5 mΩ) requires VGS ≥10 V. A 3.3 V GPIO cannot achieve low on-resistance; a gate driver (e.g., TC4427) or level-shifting circuit is required to deliver 10–15 V gate drive with sufficient peak current (>2 A) for fast switching.
How does the integrated ESD protection affect layout requirements?
The 6 kV HBM-rated gate protection diodes eliminate the need for external TVS devices on the gate node. Layout must still maintain short, low-inductance gate traces and avoid routing near noisy signals, but no additional ESD components or footprint space is required - reducing PCB layer count and assembly cost in automotive modules.
What is the maximum safe operating temperature for continuous 155 A drain current?
155 A is rated only at Tmb = 25 °C. At Tmb = 100 °C, continuous current drops to 75 A due to package thermal limits. For sustained 155 A operation, the mounting base temperature must remain ≤45 °C - achievable with a 0.25 K/W heatsink and thermal interface material, verified via thermal simulation or IR measurement.
BUK7905-40AIE,127 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- TrenchMOS™
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 75A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 5mOhm @ 50A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 127 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 5000 pF @ 25 V
- FET Feature:
- Current Sensing
- Power Dissipation (Max):
- 272W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
BUK7905-40AIE,127 FAQ
1.How can I place an order for BUK7905-40AIE,127 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7905-40AIE,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 BUK7905-40AIE,127 reliable?
The price and inventory of BUK7905-40AIE,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7905-40AIE,127 is usually 5 days.
3.What payment methods are accepted for BUK7905-40AIE,127?
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4.How is shipping managed for BUK7905-40AIE,127?
BUK7905-40AIE,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7905-40AIE,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 BUK7905-40AIE,127?
For technical support, including BUK7905-40AIE,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7905-40AIE,127 requirements.
6.How does Aetrix verify that BUK7905-40AIE,127 is sourced from the original manufacturer or authorized distributors?
All BUK7905-40AIE,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 BUK7905-40AIE,127 meets industry standards.
7.What is the process for return or replacement of BUK7905-40AIE,127?
All BUK7905-40AIE,127 units undergo pre-shipment inspection (PSI). If there is an issue with BUK7905-40AIE,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 BUK7905-40AIE,127 part is unused and in its original packaging.
Return procedure for BUK7905-40AIE,127:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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