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Nexperia USA Inc. BUK9M31-60ELX
- Part No.:
- BUK9M31-60ELX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FETs, MOSFETs
- Package:
- SOT-1210, 8-LFPAK33 (5-Lead)
- Datasheet:
-
BUK9M31-60ELX.pdf
- Description:
- SINGLE N-CHANNEL 60 V, 21 MOHM L
- Quantity:
- Payment:
- Shipping:
Inventory:2,513
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Product details
Overview
BUK9M31-60EL from Nexperia is a single N-channel logic-level MOSFET rated for 60 V drain-source voltage, 21 mΩ RDS(on) at VGS = 4.5 V and Tj = 25 °C, housed in LFPAK33 (SOT1210) package with gull-wing leads. It is AEC-Q101 qualified to 175 °C junction temperature and engineered specifically for linear-mode operation in automotive airbag squib voltage regulation.
For engineers reviewing the BUK9M31-60EL datasheet, BUK9M31-60EL pinout, BUK9M31-60EL application, or BUK9M31-60EL equivalent, key selection criteria include its enhanced SOA performance in linear mode, 2.01 K/W junction-to-mounting-base thermal resistance, and validated 35 A continuous current capability under optimized board-level thermal conditions.
Technical Context
This MOSFET employs Enhanced Safe Operating Area (SOA) technology to sustain high power dissipation in linear-regulation duty cycles-critical for precise squib voltage control during airbag deployment. Its LFPAK33 copper-clip construction delivers low parasitic inductance and high current robustness, while gull-wing terminals ensure reliable solder joint inspection and mechanical stability under thermal cycling.
The device features a gate threshold voltage of 1.4–2.1 V (typ. 1.82 V) at 25 °C and maintains functional gate drive down to 0.5 V at 175 °C, enabling stable turn-on across full automotive temperature range. Its 6 nC typical QGD and 13 nC typical QG(tot) at VGS = 4.5 V support fast, controlled switching transitions without excessive gate drive power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 60 V maximum - supports full 12 V automotive system transients including load dump up to ISO 7637-2 Pulse 5a. |
| RDS(on) | 16.5 mΩ typ. at VGS = 10 V, Tj = 25 °C - enables low conduction loss in high-current squib driver stages. |
| ID | 35 A continuous at Tmb = 25 °C - validated in application testing; limited by PCB thermal design in practice. |
| Ptot | 62 W at Tmb = 25 °C - high power handling enabled by 2.01 K/W Rth(j-mb) and copper-clip thermal path. |
| QGD | 6 nC typ. at VDS = 48 V, VGS = 4.5 V - minimizes Miller-induced switching instability in linear-mode biasing. |
| EAS | 40.4 mJ non-repetitive avalanche energy - ensures ruggedness against inductive kickback during squib discharge. |
| Tj max | 175 °C - AEC-Q101 qualified for under-hood automotive environments with extended lifetime reliability. |
Pinout & Package
LFPAK33 (SOT1210) is a plastic, single-ended surface-mount package with 8 gull-wing leads and 0.65 mm pitch. It integrates a copper clip for low-inductance, high-current mounting base connection and provides exceptional board-level reliability under thermal and mechanical stress.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Source (S) | Three parallel source terminals reduce bond-wire inductance and improve current sharing in high-di/dt squib discharge. |
| 4 | Gate (G) | Single gate input with 1.85 Ω internal gate resistance - simplifies external gate driver design and dampens ringing. |
| Mounting Base (mb) | Drain (D) | Exposed copper drain pad soldered directly to PCB thermal plane - primary heat extraction path with 2.01 K/W Rth(j-mb). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification at 175 °C | Validated for automotive under-hood use with guaranteed parametric stability over full lifetime and temperature range. |
| Enhanced SOA technology | Enables sustained linear-mode operation without thermal runaway-essential for precision squib voltage regulation. |
| LFPAK33 copper-clip construction | Reduces RDS(on) by 30% vs. standard SO8 and improves thermal resistance by 40% vs. DPAK packages. |
| Gull-wing lead geometry | Supports automated optical inspection (AOI) and eliminates solder voiding risks common with QFN thermal pads. |
| 100% avalanche-tested | Each unit verified for unclamped inductive switching robustness per IEC 60134, ensuring field reliability. |
Applications
| Automotive Airbag Squib Driver | 12 V Battery Backup Regulator |
|---|---|
|
Use Scenario: Precise voltage regulation for pyrotechnic squib firing circuits during crash event detection and deployment. IC Role / Device Role / Timing Role: Linear-mode pass element controlling squib voltage with microsecond-level response to enable safe, deterministic deployment timing. Use Value: Enhanced SOA prevents thermal failure during sustained 1–2 A squib current pulses, ensuring consistent ignition energy delivery. |
Use Scenario: Low-dropout, high-current backup regulator maintaining critical ECU supply during main battery disconnect or brownout. IC Role / Device Role / Timing Role: High-efficiency pass transistor in active linear regulator topology, delivering up to 35 A with minimal dropout voltage. Use Value: 16.5 mΩ RDS(on) at 4.5 V gate drive reduces conduction loss and thermal load versus standard MOSFETs in same footprint. |
| Engine Control Unit Power Switch | Electric Power Steering (EPS) Motor Driver |
|
Use Scenario: High-side power switch for fuel injector or ignition coil drivers requiring fast, robust switching and fault tolerance. IC Role / Device Role / Timing Role: Logic-level N-channel switch driven directly by MCU GPIO, supporting PWM frequencies up to 20 kHz. Use Value: 13 nC total gate charge and 18 ns rise time enable clean, low-loss switching transitions with minimal gate driver overhead. |
Use Scenario: Half-bridge high-side switch in EPS motor phase-legs, operating in harsh vibration and thermal environments. IC Role / Device Role / Timing Role: Automotive-grade power switch handling peak currents >100 A in pulsed operation with high dv/dt immunity. Use Value: 145 A peak drain current rating and 40.4 mJ avalanche energy withstand inductive flyback without snubber circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel automotive MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N6F7 | 60 V, 2.2 mΩ RDS(on) at 10 V, PowerFLAT 5x6 package, no AEC-Q101 linear-mode validation. | Optimized for switching efficiency in DC-DC converters-not validated for sustained linear-mode squib regulation. | Select only if application operates exclusively in saturated switching mode and does not require AEC-Q101 linear SOA certification. |
| ON Semiconductor NTMFS5C675NL | 60 V, 3.2 mΩ RDS(on) at 10 V, SO-8 package, AEC-Q101 qualified but lacks Enhanced SOA characterization. | Higher RDS(on) and lower thermal performance (Rth(j-c) ≈ 3.5 K/W) limit linear-mode headroom. | Preferable for cost-sensitive switching applications where thermal margin is less constrained than in airbag systems. |
Compared with STL220N6F7 and NTMFS5C675NL, BUK9M31-60EL uniquely combines AEC-Q101 linear-mode qualification, 2.01 K/W thermal resistance, and gull-wing manufacturability-making it the only option validated for automotive airbag squib voltage regulation under real-world thermal and transient stress.
Availability
BUK9M31-60EL is available at Aetrix Electronics and suitable for automotive airbag systems, 12 V battery backup regulators, and engine control unit power switches requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 compliance.
Supply support for BUK9M31-60EL 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.
BUK9M31-60EL belongs to Nexperia's ASFET (Application Specific Field-Effect Transistor) product line-designed explicitly for demanding automotive linear-mode and high-current switching applications where SOA, thermal robustness, and AEC-Q101 compliance are mandatory.
FAQ
Is BUK9M31-60EL suitable for linear-mode operation in airbag squib drivers?
Yes. It is explicitly designed and AEC-Q101 qualified for linear-mode operation in airbag squib voltage regulation, with Enhanced SOA technology validated across -40 °C to 175 °C. Its thermal resistance (2.01 K/W) and avalanche energy rating (40.4 mJ) ensure stable performance during sustained squib current pulses.
What is the maximum continuous drain current at 100 °C mounting base temperature?
At Tmb = 100 °C, the maximum continuous drain current is 25.6 A, as specified in Table 5 (Limiting Values). This derating reflects thermal constraints of the LFPAK33 package and must be verified against actual PCB layout and heatsinking in the target application.
Does BUK9M31-60EL have integrated ESD protection?
No. The device does not include on-chip ESD protection diodes. External TVS or RC networks are required for gate protection in automotive environments per ISO 10605 standards. Gate leakage current remains below 100 nA at ±10 V, confirming absence of integrated clamping structures.
Can BUK9M31-60EL be used as a high-side switch with 3.3 V MCU logic?
Yes. With a gate threshold voltage of 1.4–2.1 V (typ. 1.82 V) and guaranteed turn-on at VGS = 4.5 V, it functions reliably with 3.3 V logic when paired with a level-shifting gate driver or charge pump. At VGS = 3.3 V, RDS(on) rises to ~33 mΩ (typ.) at 25 °C-sufficient for many low-duty-cycle automotive loads.
BUK9M31-60ELX 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):
- 60 V
- Current - Continuous Drain (Id) @ 25°C:
- 35A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 4.5V, 10V
- Rds On (Max) @ Id, Vgs:
- 20.6mOhm @ 10A, 10V
- Vgs(th) (Max) @ Id:
- 2.1V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 37 nC @ 10 V
- Vgs (Max):
- ±10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1867 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 62W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK33
BUK9M31-60ELX FAQ
1.How can I place an order for BUK9M31-60ELX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK9M31-60ELX 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 BUK9M31-60ELX reliable?
The price and inventory of BUK9M31-60ELX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK9M31-60ELX is usually 5 days.
3.What payment methods are accepted for BUK9M31-60ELX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK9M31-60ELX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK9M31-60ELX?
BUK9M31-60ELX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK9M31-60ELX 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 BUK9M31-60ELX?
For technical support, including BUK9M31-60ELX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK9M31-60ELX requirements.
6.How does Aetrix verify that BUK9M31-60ELX is sourced from the original manufacturer or authorized distributors?
All BUK9M31-60ELX 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 BUK9M31-60ELX meets industry standards.
7.What is the process for return or replacement of BUK9M31-60ELX?
All BUK9M31-60ELX units undergo pre-shipment inspection (PSI). If there is an issue with BUK9M31-60ELX, 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 BUK9M31-60ELX part is unused and in its original packaging.
Return procedure for BUK9M31-60ELX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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