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Nexperia USA Inc. BAT54QBZ
- Part No.:
- BAT54QBZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- 3-XDFN Exposed Pad
- Datasheet:
-
BAT54QBZ.pdf
- Description:
- DIODE SCHOT 30V 200MA DFN1110D-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,360
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Product details
Overview
BAT54QBZ from Nexperia is a planar Schottky barrier diode in a leadless DFN1110D-3 (SOT8015) package, designed for ultra-high-speed switching and voltage clamping with 30 V reverse voltage rating, 800 mV forward voltage at 100 mA, and 5 ns reverse recovery time. It serves as a low-loss protection element in automotive power rail conditioning and USB interface ESD clamp circuits.
For engineers reviewing the BAT54QBZ datasheet, BAT54QBZ pinout, BAT54QBZ application, or BAT54QBZ equivalent, this page delivers verified package dimensions, AEC-Q101 qualification status, side-wettable flank solder joint inspection capability, thermal resistance (305 K/W), and real-world clamping performance under transient overvoltage conditions.
Technical Context
The BAT54QBZ implements a planar Schottky junction optimized for minimal forward conduction loss and fast minority-carrier-free switching. Its structure enables sub-5 ns reverse recovery without minority carrier storage delay, making it suitable for high-frequency DC-DC converter freewheeling and signal line clamping above 10 MHz.
Rated for 30 V reverse voltage and 200 mA continuous forward current, the device operates across −55 °C to +150 °C ambient, with thermal resistance of 305 K/W on FR4 PCB - a critical parameter for thermal design in space-constrained automotive modules where junction temperature must remain below 150 °C under pulsed load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 30 V - Maximum blocking voltage before breakdown; defines safe operating range in 24 V automotive supply clamping. |
| Forward Voltage (VF) | 800 mV at 100 mA - Low conduction loss enabling <100 mW dissipation in 12 V rail protection paths. |
| Reverse Recovery Time (trr) | 5 ns - Enables clean switching in >100 MHz digital I/O protection without ringing or overshoot. |
| Diode Capacitance (Cd) | 10 pF at 1 V - Minimal signal loading for high-speed data lines like USB 2.0 or CAN FD stubs. |
| Reverse Current (IR) | 2 µA at 25 V - Ensures negligible leakage in battery-backed backup circuits and always-on monitoring nodes. |
| Package Height | 0.48 mm - Supports ultra-thin portable electronics and stacked PCB assemblies with strict Z-axis constraints. |
Pinout & Package
DFN1110D-3 (SOT8015) is a 3-terminal, leadless, side-wettable flank plastic package measuring 1.1 mm × 1.0 mm × 0.48 mm with 0.65 mm pitch. Its ultra-low profile and visible flank geometry support automated optical inspection (AOI) of solder joints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to higher-potential node in clamping or rectification path. |
| 2 | Not Connected (n.c.) | Internally isolated terminal; no electrical function - must remain unconnected in layout. |
| 3 | Cathode (K) | Forward current exit and reverse voltage reference; ties to ground or lower-potential rail in protection circuits. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥ 8 kV), enabling use in engine control units and ADAS sensor interfaces. |
| Side-wettable flanks | Enables AOI-compatible solder joint verification on bottom-side terminations - critical for zero-defect manufacturing in Tier-1 automotive SMT lines. |
| Low 0.5 mm package height | Reduces mechanical interference in multi-layer flex-rigid assemblies used in infotainment displays and camera modules. |
| 10 pF capacitance at 1 V | Maintains signal integrity on 480 Mbps USB 2.0 differential pairs without measurable eye diagram degradation. |
Applications
| Automotive Power Rail Clamping | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 12 V battery-fed ECUs during alternator regulation faults. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between VBUS and GND, conducting only during overvoltage events exceeding 30 V. Use Value: Prevents damage to downstream PMICs and microcontrollers by limiting peak rail voltage to ≤30 V with <5 ns response latency. |
Use Scenario: Protecting USB 2.0 D+ and D− lines from ESD strikes per IEC 61000-4-2 Level 4 (±15 kV air). IC Role / Device Role / Timing Role: Low-capacitance shunt diode connected between data line and ground, clamping ESD current before IC input structures fail. Use Value: Maintains 480 Mbps signaling integrity while diverting >15 A ESD pulses with <10 pF parasitic loading. |
| High-Frequency DC-DC Freewheeling | Low-Voltage Logic-Level Clamping |
Use Scenario: Freewheeling path in 2 MHz synchronous buck converters powering FPGA core rails. IC Role / Device Role / Timing Role: Fast-recovery Schottky diode providing return path for inductor current during high-side FET off-time. Use Value: Eliminates reverse recovery tail, reducing switching losses by up to 18% versus standard silicon diodes at 2 MHz. |
Use Scenario: Level-shifting and overvoltage protection for 1.8 V/3.3 V GPIO pins interfacing with external sensors. IC Role / Device Role / Timing Role: Clamp diode tied between I/O pin and local supply, conducting when input exceeds VDD + 0.8 V. Use Value: Limits pin voltage to safe levels without affecting 100 MHz digital timing margins due to 5 ns trr and 10 pF Cd. |
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 NSR0230P2T5G | Same 30 V VR and 0.8 V VF, but in SOD-923 (1.0 mm × 0.6 mm); 12 pF capacitance; not AEC-Q101 qualified. | Lacks automotive qualification; unsuitable for under-hood modules but acceptable for consumer portables. | Select when footprint compatibility with SOD-923 is required and AEC-Q101 is not mandated. |
| Vishay VS-2EDL03HM3/H | Higher 40 V VR, 0.75 V VF, 8 pF Cd, but in larger SOD-323 (1.7 mm × 1.3 mm); AEC-Q101 qualified. | Offers higher voltage margin and lower capacitance, but occupies 2.2× more board area than DFN1110D-3. | Choose when system-level overvoltage risk exceeds 30 V or when tighter capacitance tolerance (<8 pF) is critical. |
Compared with NSR0230P2T5G and VS-2EDL03HM3/H, the BAT54QBZ uniquely balances AEC-Q101 compliance, ultra-small DFN1110D-3 footprint, and 5 ns trr - making it optimal for space- and reliability-constrained automotive signal protection where both size and qualification are non-negotiable.
Availability
BAT54QBZ is available at Aetrix Electronics and suitable for automotive power rail clamping, USB 2.0 data line protection, and high-frequency DC-DC freewheeling requiring stable component supply across production lifecycles.
Supply support for BAT54QBZ 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 components and advanced packaging technologies.
The BAT54QBZ belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for compact, high-speed protection in automotive infotainment, body electronics, and ADAS subsystems.
FAQ
Is BAT54QBZ suitable for 24 V automotive systems?
Yes. With a 30 V reverse voltage rating and AEC-Q101 qualification, BAT54QBZ supports 24 V nominal systems including load-dump protection up to ISO 7637-2 Pulse 5a (clamped to ≤30 V). Its 150 °C max junction temperature and −55 °C to +150 °C ambient range meet under-hood thermal requirements.
Can BAT54QBZ replace BAT54C in existing designs?
No - BAT54C is a dual-common-cathode configuration in SOT23, while BAT54QBZ is a single diode in DFN1110D-3 with Pin 2 unconnected. Footprint, pin count, and internal topology differ fundamentally; redesign of layout and schematic is required for substitution.
What is the significance of side-wettable flanks in DFN1110D-3?
Side-wettable flanks provide exposed solderable metal on the package edges, enabling automated optical inspection (AOI) of solder joint quality on bottom-terminated components. This eliminates X-ray dependency and improves first-pass yield in high-reliability automotive SMT lines.
Does BAT54QBZ support reflow soldering per JEDEC J-STD-020?
Yes. The DFN1110D-3 package is qualified for standard Pb-free reflow profiles (peak 260 °C, 20–40 s above 217 °C). Nexperia provides validated footprint and stencil recommendations (0.1 mm thickness, 0.34 mm × 0.34 mm pads) in the official application note AN10792.
BAT54QBZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 3-XDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN1110D-3
- Operating Temperature - Junction:
- 150°C
BAT54QBZ FAQ
1.How can I place an order for BAT54QBZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54QBZ 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 BAT54QBZ reliable?
The price and inventory of BAT54QBZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54QBZ is usually 5 days.
3.What payment methods are accepted for BAT54QBZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54QBZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54QBZ?
BAT54QBZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54QBZ 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 BAT54QBZ?
For technical support, including BAT54QBZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54QBZ requirements.
6.How does Aetrix verify that BAT54QBZ is sourced from the original manufacturer or authorized distributors?
All BAT54QBZ 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 BAT54QBZ meets industry standards.
7.What is the process for return or replacement of BAT54QBZ?
All BAT54QBZ units undergo pre-shipment inspection (PSI). If there is an issue with BAT54QBZ, 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 BAT54QBZ part is unused and in its original packaging.
Return procedure for BAT54QBZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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