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Nexperia USA Inc. BUK7M15-40HX
- Part No.:
- BUK7M15-40HX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SOT-1210, 8-LFPAK33 (5-Lead)
- Datasheet:
-
BUK7M15-40HX.pdf
- Description:
- MOSFET N-CH 40V 30A LFPAK33
- Quantity:
- Payment:
- Shipping:
Inventory:2,954
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Product details
Overview
BUK7M15-40HX from Nexperia is an AEC-Q101 qualified N-channel standard-level MOSFET in LFPAK33 (SOT1210) package, featuring 40 V VDS, 15.0 mΩ RDS(on) at VGS = 10 V and Tj = 25 °C, 30 A continuous drain current capability, and repetitive avalanche rating - deployed in automotive 12 V powertrain and body control modules.
For engineers reviewing the BUK7M15-40HX datasheet, BUK7M15-40HX pinout, BUK7M15-40HX application, or BUK7M15-40HX equivalent, this page delivers verified electrical specs, thermal resistance (Rth(j-mb) = 3.22 K/W), gate charge (QGD = 1.7 nC typ), softness factor (S = 0.56), and LFPAK33 mounting-base thermal interface details critical for high-reliability automotive PCB layout and thermal design.
Technical Context
This MOSFET employs Trench 9 superjunction technology to achieve low conduction losses and high power density while maintaining robust switching behavior. Its LFPAK33 copper clip construction ensures low parasitic inductance and high thermal conductivity from junction to mounting base.
The device is fully specified for operation up to Tj = 175 °C and supports repetitive avalanche energy of 10.7 mJ (unclamped), with a gate threshold voltage (VGS(th)) ranging from 1.0 V (min at 175 °C) to 3.6 V (max at 25 °C), enabling stable turn-on across automotive temperature extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 40 V maximum drain-source voltage - defines safe blocking capability in 12 V automotive systems with load-dump transients. |
| RDS(on) | 12.2 mΩ typical at VGS = 10 V, ID = 10 A, Tj = 25 °C - enables low conduction loss in medium-power motor drives and DC-DC converters. |
| ID (cont) | 30 A at Tmb = 25 °C - validated continuous current under ideal thermal conditions; real-world limit set by PCB copper area and heatsinking. |
| QGD | 1.7 nC typical - low gate-drain charge reduces Miller-induced switching delay and improves EMI performance in high-frequency PWM applications. |
| Rth(j-mb) | 3.22 K/W typical - quantifies thermal resistance from silicon junction to PCB mounting base, critical for calculating junction temperature rise under load. |
| EAS | 10.7 mJ non-repetitive avalanche energy - supports robustness against inductive switching spikes without external snubbers in solenoid or relay drivers. |
| S (softness) | 0.56 typical - higher softness factor indicates gentler diode reverse recovery, reducing voltage overshoot and EMI during freewheeling in motor control. |
Pinout & Package
LFPAK33 (SOT1210) is a surface-mount, single-ended package with gull-wing leads and an exposed copper mounting base electrically connected to the drain terminal. It features high thermal efficiency via direct die-to-PCB thermal path and AOI-compatible lead geometry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Source (S) | Three parallel source terminals reduce package inductance and improve current sharing in high-di/dt switching. |
| 4 | Gate (G) | Single gate input with 0.9 Ω typical gate resistance - optimized for standard 5–10 V logic-level drive without external gate resistors in most cases. |
| Mounting Base (mb) | Drain (D) | Exposed copper pad tied internally to drain - serves as primary thermal and electrical connection point to PCB ground plane or heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification at 175 °C | Validated reliability for under-hood automotive use including engine control units and transmission modules. |
| Trench 9 superjunction architecture | Delivers 15 mΩ RDS(on) at 40 V rating - achieves higher power density than planar MOSFETs in same footprint. |
| Repetitive avalanche rated | Withstands repeated inductive energy dumps (e.g., fuel injector or valve coil de-energization) without degradation. |
| Gull-wing leads + copper clip | Enables automated optical inspection (AOI) and provides <3.5 K/W thermal resistance - superior to SO-8 and DPAK alternatives. |
| Soft reverse recovery diode | S = 0.56 minimizes voltage ringing during commutation - reduces need for external RC snubbers in BLDC gate-drive designs. |
Applications
| Engine Control Unit (ECU) Solenoid Driver | Automotive LED Headlamp Dimming |
|---|---|
|
Use Scenario: Driving 12 V fuel injectors or variable valve timing solenoids requiring fast, reliable on/off control under wide temperature range. IC Role / Device Role / Timing Role: High-side or low-side switch handling pulsed 5–20 A loads with µs-scale turn-off to prevent coil saturation and ensure precise timing. Use Value: Repetitive avalanche rating absorbs inductive kickback without clamping diodes; low QGD ensures clean turn-off edge and reduced EMI in crowded ECU layouts. |
Use Scenario: PWM dimming of high-brightness LED arrays in adaptive front lighting systems (AFS), operating continuously at ambient temperatures up to 105 °C. IC Role / Device Role / Timing Role: Low-side current switch modulating LED string current at 1–20 kHz with minimal conduction loss and thermal rise. Use Value: 12.2 mΩ RDS(on) limits I²R heating; LFPAK33's 3.22 K/W Rth(j-mb) allows direct PCB copper heatsinking - eliminates need for discrete heatsinks in space-constrained headlamp modules. |
| 12 V DC-DC Converter High-Side Switch | Body Control Module (BCM) Power Distribution |
|
Use Scenario: High-side synchronous rectifier in 12 V → 5/3.3 V buck converters for infotainment and ADAS domain controllers. IC Role / Device Role / Timing Role: Fast-switching power FET operating at 300–500 kHz with low QG(tot) (9.1 nC typ) to minimize gate drive loss. Use Value: Ciss = 572 pF and Crss = 28 pF enable stable high-frequency operation; low RDS(on) maintains >92% efficiency at 10 A output. |
Use Scenario: Centralized power distribution for door locks, window lifts, and mirror controls in modern BCMs with centralized fuseless architecture. IC Role / Device Role / Timing Role: Protected load switch managing up to 30 A per channel with built-in overtemperature and short-circuit detection support. Use Value: Mounting base (drain) connection simplifies PCB thermal management; AEC-Q101 qualification ensures 15-year field life in harsh cabin environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel 40 V automotive MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N4F7AG | 40 V, 2.2 mΩ RDS(on), PowerFLAT 5x6 package, 175 °C rated - lower RDS(on) but higher QG (25 nC) and larger footprint. | Better for ultra-low-loss 12 V bus switching; less suitable for high-frequency PWM due to higher gate charge and slower switching. | Select when minimizing conduction loss dominates over switching loss - e.g., always-on power rails - not for motor PWM or DC-DC. |
| ON Semiconductor NTMFS4C09NT1G | 40 V, 9.0 mΩ RDS(on), SO-8FL package, AEC-Q101 - lower RDS(on) but higher Rth(j-mb) (~5.0 K/W) and no repetitive avalanche rating. | Higher thermal resistance requires larger copper pour; absence of avalanche rating necessitates external protection in inductive loads. | Prefer for cost-sensitive, non-inductive applications like LED biasing where thermal margin exists and no flyback energy is present. |
Compared with STL220N4F7AG and NTMFS4C09NT1G, BUK7M15-40HX balances low RDS(on), low QGD, proven avalanche ruggedness, and industry-leading thermal resistance in a compact LFPAK33 - making it optimal for thermally constrained, inductive automotive switching where reliability and EMI control are prioritized over absolute minimum on-resistance.
Availability
BUK7M15-40HX is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics, and infotainment systems requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle assurance.
Supply support for BUK7M15-40HX 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, ESD protection, and logic ICs.
BUK7M15-40HX belongs to Nexperia's LFPAK automotive MOSFET product line, engineered specifically for demanding 12 V vehicle systems requiring AEC-Q101 compliance, high thermal efficiency, and robustness against electrical overstress and thermal cycling.
FAQ
Is BUK7M15-40HX pin-compatible with other LFPAK33 MOSFETs?
Yes - all LFPAK33 (SOT1210) MOSFETs share identical mechanical footprint, pin numbering, and mounting base configuration. BUK7M15-40HX uses pins 1–3 for source, pin 4 for gate, and the exposed base for drain, matching the JEDEC SOT1210 standard exactly.
What is the maximum recommended PCB copper area for thermal performance?
Nexperia recommends ≥ 200 mm² of 2-oz copper connected directly to the mounting base for optimal thermal performance. With this layout, the device sustains 30 A continuous current at Tmb ≤ 25 °C; derating follows the normalized curve in Figure 2 of the datasheet.
Does BUK7M15-40HX require a gate resistor for automotive 12 V applications?
A gate resistor is not mandatory but recommended between 4.7 Ω and 10 Ω to dampen ringing and control dV/dt during switching. The device's 0.9 Ω intrinsic gate resistance and low QGD allow fast, stable switching with standard microcontroller GPIO drivers (3.3 V or 5 V).
Can BUK7M15-40HX be used in high-side configuration with 12 V supply?
Yes - its 20 V maximum |VGS| rating supports gate drive up to 12 V relative to source. For high-side use, a bootstrap or isolated gate driver is required to maintain VGS > 10 V during conduction; the device's VGS(th) stability up to 175 °C ensures reliable turn-on across automotive temperature ranges.
BUK7M15-40HX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOT-1210, 8-LFPAK33 (5-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 30A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 15mOhm @ 10A, 10V
- Vgs(th) (Max) @ Id:
- 3.6V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 12.7 nC @ 10 V
- Vgs (Max):
- +20V, -10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 801 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 44W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK33
BUK7M15-40HX FAQ
1.How can I place an order for BUK7M15-40HX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7M15-40HX 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 BUK7M15-40HX reliable?
The price and inventory of BUK7M15-40HX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7M15-40HX is usually 5 days.
3.What payment methods are accepted for BUK7M15-40HX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7M15-40HX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7M15-40HX?
BUK7M15-40HX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7M15-40HX 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 BUK7M15-40HX?
For technical support, including BUK7M15-40HX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7M15-40HX requirements.
6.How does Aetrix verify that BUK7M15-40HX is sourced from the original manufacturer or authorized distributors?
All BUK7M15-40HX 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 BUK7M15-40HX meets industry standards.
7.What is the process for return or replacement of BUK7M15-40HX?
All BUK7M15-40HX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7M15-40HX, 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 BUK7M15-40HX part is unused and in its original packaging.
Return procedure for BUK7M15-40HX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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