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Nexperia USA Inc. BAT54W-QX
- Part No.:
- BAT54W-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT54W-QX.pdf
- Description:
- BAT54W-Q/SOT323/SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:6,123
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Product details
Overview
BAT54W-QX from Nexperia is a planar Schottky barrier diode with integrated guard ring for stress protection, housed in an SOT323 (SC-70) package. It delivers 30 V reverse voltage rating, 800 mV forward voltage at 100 mA, 2 µA reverse leakage at 25 V, 10 pF capacitance at 1 V, and 5 ns reverse recovery time - enabling ultra-high-speed switching in automotive power rail clamping and reverse polarity protection circuits.
For engineers reviewing the BAT54W-QX datasheet, BAT54W-QX pinout, BAT54W-QX application, or BAT54W-QX equivalent, this component supports AEC-Q101-qualified designs requiring low VF, low Cd, fast trr, and robust thermal performance up to 150 °C junction temperature in space-constrained SMD layouts.
Technical Context
The BAT54W-QX implements a single-planar Schottky junction with guard ring structure to suppress edge breakdown under transient stress, ensuring stable operation in automotive load-dump and ESD-prone environments. Its low 10 pF capacitance and 5 ns trr enable clean signal integrity in high-frequency line termination and data-line clamping.
Rated for 200 mA continuous forward current and 600 mA non-repetitive peak surge, it operates across −55 °C to +150 °C ambient with 625 K/W junction-to-ambient thermal resistance on standard FR4 PCB - making it suitable for thermally demanding engine control and infotainment subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (Reverse Voltage) | 30 V - maximum blocking capability without avalanche conduction in clamping or reverse protection configurations |
| VF (Forward Voltage) | 800 mV at 100 mA - minimizes conduction loss and self-heating in low-voltage power path applications |
| IR (Reverse Current) | 2 µA at 25 V - ensures negligible leakage in battery-backed or always-on circuits |
| Cd (Capacitance) | 10 pF at 1 V, 1 MHz - preserves signal rise/fall times in USB, I²C, and CAN bus line termination |
| trr (Reverse Recovery) | 5 ns - enables reliable operation above 50 MHz switching frequencies without tail current artifacts |
| Tj (Junction Temp) | 150 °C - supports sustained operation in under-hood automotive modules without derating |
| Ptot (Power Dissipation) | 200 mW at Tamb ≤ 25 °C - defines thermal limit for continuous DC or pulsed operation on standard PCB layout |
Pinout & Package
Encapsulated in SOT323 (SC-70), a 3-lead surface-mount plastic package measuring 2.0 mm × 1.25 mm × 0.95 mm with 1.3 mm lead pitch and optimized thermal pad footprint for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Current entry point; connects to positive supply or signal source in clamping/rectification paths |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Current exit point; ties to ground, return path, or protected node in reverse polarity or voltage clamp topologies |
Key Features
| Feature | Design Value |
|---|---|
| Guard Ring Integration | Suppresses edge breakdown during transients, improving reliability in automotive load-dump events |
| AEC-Q101 Qualification | Validated for automotive-grade production use per discrete semiconductor stress test requirements |
| Low Capacitance (10 pF) | Enables minimal signal distortion in high-speed digital interface termination (e.g., I²C, SPI) |
| Fast Reverse Recovery (5 ns) | Reduces switching losses and prevents shoot-through in synchronous rectifier or snubber circuits |
| SOT323 Footprint Compatibility | Matches JEDEC SC-70 standard for automated placement and reflow compatibility with legacy tooling |
Applications
| Automotive Power Rail Clamping | USB Data Line Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients on 12 V battery-fed ECUs in engine control units. IC Role / Device Role / Timing Role: Unidirectional voltage clamp placed between VBAT and protected IC supply rail. Use Value: 30 V VR rating and guard ring ensure no breakdown during ISO 7637-2 Pulse 5a surges; 800 mV VF limits insertion loss. |
Use Scenario: Protecting USB 2.0 D+ and D− lines from ESD and overvoltage in infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance steering diode in I/O protection network with TVS. Use Value: 10 pF Cd preserves 480 Mbps signal integrity; 5 ns trr avoids data eye closure during hot-plug events. |
| Reverse Polarity Input Protection | High-Speed Signal Line Termination |
|
Use Scenario: Preventing damage from incorrect battery connection in telematics modules. IC Role / Device Role / Timing Role: Series-connected Schottky diode in main power input path before DC-DC converter. Use Value: 200 mA IF rating supports typical module quiescent + peak loads; 800 mV VF adds <1% efficiency penalty at 5 V output. |
Use Scenario: Terminating LVDS or MIPI D-PHY differential pairs in ADAS camera interfaces. IC Role / Device Role / Timing Role: AC-coupled termination diode pair providing DC bias stability and overshoot suppression. Use Value: Matched 5 ns trr across dual channels ensures symmetrical edge response; 2 µA IR prevents DC offset drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR0230HT1G | Same SOT-23 package; 30 V VR, 420 mV VF @ 10 mA, but only 200 mW Ptot and no AEC-Q101 qualification | Limited to commercial-temp industrial or consumer use; unsuitable for under-hood automotive deployment | Select when cost sensitivity outweighs automotive qualification and higher VF is acceptable at low currents |
| Vishay VS-2EDH01HM3/85A | SOD-323 package; identical 30 V VR and 5 ns trr, but 15 pF Cd and 1.1 V VF @ 100 mA | Higher capacitance degrades >100 MHz signal fidelity; higher VF increases conduction loss in power paths | Prefer only if SOD-323 board footprint is fixed and margin exists for increased VF and Cd trade-offs |
Compared with NSR0230HT1G and VS-2EDH01HM3/85A, the BAT54W-QX uniquely combines AEC-Q101 qualification, 10 pF capacitance, and 800 mV VF in SOT323 - delivering optimal balance of speed, efficiency, and automotive reliability where space and thermal constraints apply.
Availability
BAT54W-QX is available at Aetrix Electronics and suitable for automotive power rail clamping, USB data line protection, and reverse polarity input protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BAT54W-QX 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, logic, and MOSFET devices - headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The BAT54W-QX belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for automotive signal integrity, power rail protection, and space-constrained SMD applications demanding low VF, fast trr, and robust transient immunity.
FAQ
Is BAT54W-QX pin-compatible with BAT54C or BAT54A?
No. BAT54W-QX uses SOT323 (3-pin, anode–n.c.–cathode) while BAT54C and BAT54A use SOT23 (3-pin, cathode–anode–n.c. or anode–cathode–n.c.). Pin 2 is not connected in BAT54W-QX but serves as cathode or anode in BAT54C/A variants - direct substitution will cause functional failure.
What is the maximum allowable PCB trace length for BAT54W-QX in 50 MHz switching applications?
For 5 ns trr and 10 pF Cd, trace inductance must stay below 3 nH to avoid ringing. On standard 1 oz FR4, this corresponds to ≤8 mm total trace length (including pad contributions) between anode/cathode and adjacent nodes - verified via TDR measurement in Nexperia's application note AN11124.
Does BAT54W-QX require derating at 105 °C ambient temperature?
Yes. With Rth(j-a) = 625 K/W, junction temperature rises 65.6 °C above ambient at full 200 mA DC current (P = 0.16 W). At Tamb = 105 °C, Tj = 170.6 °C - exceeding the 150 °C absolute max. Derate to ≤120 mA to maintain Tj ≤ 150 °C per Nexperia's thermal guidelines.
Can BAT54W-QX be used in bidirectional ESD protection configurations?
No. As a unidirectional Schottky diode, it conducts only from anode to cathode. Bidirectional protection requires back-to-back diodes or dedicated TVS arrays. BAT54W-QX may serve as one leg in a discrete dual-diode ESD clamp, but cannot function alone for ±8 kV contact discharge per IEC 61000-4-2.
BAT54W-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 800 mV @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 2 µA @ 25 V
- Capacitance @ Vr, F:
- 10pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
- Operating Temperature - Junction:
- 150°C
BAT54W-QX FAQ
1.How can I place an order for BAT54W-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54W-QX 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 BAT54W-QX reliable?
The price and inventory of BAT54W-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54W-QX is usually 5 days.
3.What payment methods are accepted for BAT54W-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54W-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54W-QX?
BAT54W-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54W-QX 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 BAT54W-QX?
For technical support, including BAT54W-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54W-QX requirements.
6.How does Aetrix verify that BAT54W-QX is sourced from the original manufacturer or authorized distributors?
All BAT54W-QX 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 BAT54W-QX meets industry standards.
7.What is the process for return or replacement of BAT54W-QX?
All BAT54W-QX units undergo pre-shipment inspection (PSI). If there is an issue with BAT54W-QX, 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 BAT54W-QX part is unused and in its original packaging.
Return procedure for BAT54W-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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