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Nexperia USA Inc. BAT854W-QX
- Part No.:
- BAT854W-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT854W-QX.pdf
- Description:
- DIODE SCHOTTKY 40V 200MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,926
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Product details
Overview
BAT854W-QX from Nexperia is a planar Schottky barrier diode with integrated guard ring for stress protection, rated at 40 V reverse voltage and 200 mA forward current, housed in an SOT323 (SC-70) package. It delivers 550 mV forward voltage at 100 mA and 0.5 µA reverse current at 25 V, enabling ultra-high-speed switching and low-power clamping in automotive-grade portable electronics.
For engineers reviewing the BAT854W-QX datasheet, BAT854W-QX pinout, BAT854W-QX application, or BAT854W-QX equivalent, this device is selected for precision voltage clamping, reverse polarity protection, and high-efficiency blocking in space-constrained automotive and handheld systems where low VF and minimal IR are critical.
Technical Context
This Schottky diode uses a planar silicon structure with an integrated guard ring to suppress edge breakdown and improve reliability under transient stress. Its low junction capacitance (20 pF at 1 V) and fast recovery enable operation beyond 100 MHz in RF detector and sample-and-hold circuits.
The device operates across −65 °C to +150 °C ambient and junction temperatures, with thermal resistance of 625 K/W on standard FR4 PCB - confirming suitability for thermally demanding automotive cabin modules and engine control interface protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 40 V - Maximum DC or repetitive peak reverse bias before breakdown; defines clamping headroom in 24 V automotive supply rails. |
| Forward Current (IF) | 200 mA continuous - Sustained conduction capability without thermal runaway on standard PCB layout. |
| Forward Voltage (VF) | 550 mV at 100 mA, 25 °C - Enables <100 mW power loss in 3.3 V logic-level blocking paths. |
| Reverse Current (IR) | 0.5 µA at 25 V, pulsed - Ensures <1 µW leakage in battery-backed real-time clock hold-up circuits. |
| Junction Capacitance (Cd) | 20 pF at 1 V, 1 MHz - Supports >100 MHz signal integrity in RF envelope detection and high-speed data line protection. |
| Thermal Resistance (Rth(j-a)) | 625 K/W on single-sided FR4 - Requires no heatsink for ≤150 mW dissipation in compact automotive sensor nodes. |
Pinout & Package
Encapsulated in SOT323 (SC-70), a 2.0 mm × 1.25 mm × 0.95 mm surface-mount plastic package with 1.3 mm lead pitch and tin-plated terminations compatible with reflow and wave soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Primary P-side connection; must be biased positive relative to cathode for forward conduction. |
| 2 | Not Connected (n.c.) | Internally isolated terminal; no electrical function - must remain unconnected on PCB. |
| 3 | Cathode (K) | N-side return path; tied to ground or lower-potential rail in clamping and reverse-blocking configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring protection | Suppresses edge leakage and improves ESD robustness (HBM >8 kV) without increasing VF or Cd. |
| AEC-Q101 qualification | Validated for automotive applications including infotainment power sequencing and body control module I/O protection. |
| Low VF vs. temperature stability | VF drift <1.2 mV/°C from 25 °C to 125 °C - maintains predictable conduction loss in under-hood environments. |
| Ultra-small footprint | SOT323 package saves ≥60% board area versus SOT23 - enables dual-diode layouts in USB-C port protection. |
Applications
| Automotive Cabin Sensors | USB Power Delivery Protection |
|---|---|
Use Scenario: Reverse polarity and load-dump transient suppression in HVAC temperature sensor modules. IC Role / Device Role / Timing Role: Bidirectional clamping diode placed between 5 V supply and microcontroller I/O pins. Use Value: 0.5 µA IR prevents battery drain during sleep mode; 40 V VR withstands ISO 7637-2 pulse 1a (−100 V). |
Use Scenario: VBUS overvoltage clamping and CC line ESD protection in Type-C receptacles. IC Role / Device Role / Timing Role: Low-capacitance shunt diode on CC1/CC2 lines with guard ring for IEC 61000-4-2 Level 4 immunity. Use Value: 20 pF Cd preserves USB 2.0 signal integrity; 550 mV VF ensures minimal insertion loss in 3.3 V CC bias networks. |
| Portable Medical Monitors | Industrial IoT Edge Nodes |
Use Scenario: Battery backup diode isolation in wearable ECG front-end power domains. IC Role / Device Role / Timing Role: Blocking diode between Li-ion cell and 3.3 V LDO output to prevent backfeed during charging. Use Value: 550 mV VF limits voltage drop to <2% of nominal 3.3 V rail - preserving ADC reference accuracy. |
Use Scenario: Signal line protection for RS-485 transceivers in smart meter communication interfaces. IC Role / Device Role / Timing Role: Transient voltage suppressor on A/B differential pairs, connected anode-to-ground. Use Value: Guard ring enables 1000+ cycles of 1 kV EFT burst immunity without parameter shift per IEC 61000-4-4. |
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 | 30 V VR, 200 mA IF, VF = 450 mV @ 100 mA - lower voltage rating but 100 mV lower VF. | Not qualified to AEC-Q101; limited to consumer-grade portable devices. | Select when VF minimization outweighs automotive qualification and 40 V headroom. |
| Vishay VS-2EDH02HM3/85A | 40 V VR, 200 mA IF, VF = 580 mV @ 100 mA, Rth(j-a) = 500 K/W - higher thermal efficiency but higher VF. | Qualified to AEC-Q101; larger SOD-323 package (2.7 × 1.7 mm) increases board area by 70%. | Select when thermal margin is critical and PCB space allows larger footprint. |
Compared with NSR0230P2T5G and VS-2EDH02HM3/85A, BAT854W-QX uniquely balances AEC-Q101 compliance, 40 V rating, 550 mV VF, and minimal SOT323 footprint - making it optimal for space- and reliability-constrained automotive sensor nodes.
Availability
BAT854W-QX is available at Aetrix Electronics and suitable for automotive cabin sensors, USB Power Delivery protection, portable medical monitors, and industrial IoT edge nodes requiring stable component supply and full AEC-Q101 traceability.
Supply support for BAT854W-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 and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
BAT854W-QX belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for low-loss, high-speed protection in automotive power management and signal interface applications.
FAQ
Is BAT854W-QX pin-compatible with BAT54 series diodes?
No. BAT854W-QX has a 3-pin SOT323 package with Pin 2 internally not connected, whereas BAT54 variants use SOT23 with all three pins functional. Substitution requires PCB layout revision and verification of n.c. pin routing.
What is the maximum allowable soldering temperature profile for BAT854W-QX?
BAT854W-QX complies with IPC-J-STD-020 moisture sensitivity level 1 and supports peak reflow temperatures up to 260 °C for ≤30 seconds. The recommended profile uses ramp rate ≤3 °C/s, preheat 150–200 °C for 60–120 s, and time above liquidus 60–90 s at 235–245 °C.
Does the guard ring affect thermal performance?
No. The guard ring is a shallow diffusion feature confined to the die periphery and does not alter junction-to-case thermal resistance. Measured Rth(j-a) remains 625 K/W on standard FR4, identical to non-guard-ring variants in same package.
Can BAT854W-QX be used in AC signal rectification?
Yes, but only for low-current, high-frequency signals (<10 MHz) due to its 20 pF capacitance and lack of specified reverse recovery time. It is not recommended for mains-frequency (50/60 Hz) rectification where low IR and high VR are insufficient for ripple filtering.
BAT854W-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):
- 40 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 nA @ 25 V
- Capacitance @ Vr, F:
- 20pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
- Operating Temperature - Junction:
- 150°C
BAT854W-QX FAQ
1.How can I place an order for BAT854W-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT854W-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 BAT854W-QX reliable?
The price and inventory of BAT854W-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT854W-QX is usually 5 days.
3.What payment methods are accepted for BAT854W-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT854W-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT854W-QX?
BAT854W-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT854W-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 BAT854W-QX?
For technical support, including BAT854W-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT854W-QX requirements.
6.How does Aetrix verify that BAT854W-QX is sourced from the original manufacturer or authorized distributors?
All BAT854W-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 BAT854W-QX meets industry standards.
7.What is the process for return or replacement of BAT854W-QX?
All BAT854W-QX units undergo pre-shipment inspection (PSI). If there is an issue with BAT854W-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 BAT854W-QX part is unused and in its original packaging.
Return procedure for BAT854W-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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