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Nexperia USA Inc. BZX384-B6V8-QX
- Part No.:
- BZX384-B6V8-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B6V8-QX.pdf
- Description:
- DIODE ZENER 6.8V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,864
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Product details
Overview
BZX384-B6V8-Q from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 6.8 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-B6V8-Q datasheet, BZX384-B6V8-Q pinout, BZX384-B6V8-Q application, or BZX384-B6V8-Q equivalent, this device serves as a precision low-power shunt regulator in ECU power rails, sensor biasing networks, and ADC reference stabilization where stable 6.8 V clamping with <±2 % tolerance and low thermal drift is required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a nominal 6.8 V regulation voltage at IZ = 5 mA, differential resistance of 80 Ω max, and temperature coefficient of +1.2 mV/K - indicating positive drift optimized for mid-range voltage stability across automotive ambient temperatures.
It delivers non-repetitive peak reverse power dissipation up to 40 W for surge suppression, supports forward current up to 250 mA, and maintains junction temperature ≤150 °C under FR4 PCB mounting conditions with single-sided copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 6.66 V to 6.94 V at IZ = 5 mA - ensures tight 6.8 V regulation with ±2 % tolerance for accurate voltage referencing. |
| Differential Resistance rdif | ≤80 Ω - minimizes output voltage variation under load current changes in feedback or clamp circuits. |
| Reverse Current IR | ≤15 μA at VR = 4.76 V - guarantees low leakage in standby or high-impedance bias networks. |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - defines continuous DC power handling on standard FR4 PCB. |
| Non-repetitive Peak Power | 40 W for tp = 100 μs - enables transient overvoltage suppression without failure. |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in under-hood automotive environments. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm footprint, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode-to-cathode voltage establishes Zener conduction. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation or clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - certified for use in engine control units, body electronics, and ADAS power domains. |
| Tolerance grade | ±2 % (B-series) - tighter than standard Zeners, enabling direct replacement in precision reference designs without recalibration. |
| Thermal stability | +1.2 mV/K temperature coefficient at 6.8 V - reduces drift-induced error in temperature-varying environments vs. lower-voltage Zeners. |
| Low leakage | ≤15 μA at 70 % of VZ - preserves battery life in always-on vehicle modules and avoids loading sensitive sensor outputs. |
| Surge robustness | 40 W non-repetitive peak power - withstands ISO 7637-2 pulse 1/2a/2b transients without degradation. |
Applications
| Engine Control Unit (ECU) Power Rail Clamp | Automotive Sensor Bias Reference |
|---|---|
|
Use Scenario: Clamps 12 V supply rail against load-dump transients in microcontroller power domain. IC Role / Device Role / Timing Role: Shunt regulator providing passive overvoltage protection upstream of LDOs and MCU VCC. Use Value: Limits rail voltage to ≤7.5 V during 40 W surges, preventing latch-up or damage to 5 V logic interfaces. |
Use Scenario: Supplies stable bias voltage to analog pressure or temperature sensors in cabin air control module. IC Role / Device Role / Timing Role: Precision voltage reference establishing sensor excitation level independent of main 5 V rail fluctuations. Use Value: Maintains <±2 % accuracy across −40 °C to +125 °C, reducing sensor offset error by >30 % vs. ±5 % Zeners. |
| ADC Reference Stabilization | Infotainment System Overvoltage Protection |
|
Use Scenario: Provides clean 6.8 V reference for 12-bit SAR ADC measuring battery voltage in telematics unit. IC Role / Device Role / Timing Role: Low-noise shunt reference replacing higher-cost bandgap ICs in cost-sensitive subsystems. Use Value: Delivers <80 Ω dynamic impedance, limiting reference voltage shift to <0.12 V under 1.5 mA ADC reference load. |
Use Scenario: Protects USB-C PD controller and display driver ICs from 24 V jump-start events in center console. IC Role / Device Role / Timing Role: Fast-response clamping element in series with TVS diode for multi-stage surge suppression. Use Value: Activates within 100 ns at 6.8 V, diverting >3 A surge current before downstream ICs experience overvoltage stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-A6V8-Q | ±1 % tolerance (vs. ±2 %); 60 Ω max rdif; identical package and thermal specs. | Required where absolute voltage accuracy dominates cost sensitivity - e.g., calibration-critical instrumentation. | Select when system-level tolerance budget demands <±10 mV deviation at 6.8 V. |
| BZX384-C6V8-Q | ±5 % tolerance (vs. ±2 %); 200 Ω max rdif; same surge rating and AEC-Q101 qualification. | Suitable for non-critical clamping where cost reduction outweighs regulation precision - e.g., LED current limiting. | Choose only if design tolerates 6.4 V–7.2 V variation and thermal drift is mitigated externally. |
Compared with BZX384-A6V8-Q, the BZX384-B6V8-Q trades 1 % tolerance for broader production yield and lower unit cost while retaining automotive qualification; versus BZX384-C6V8-Q, it delivers twice the voltage accuracy and 2.5× lower dynamic impedance for improved regulation fidelity in signal-chain references.
Availability
BZX384-B6V8-Q is available at Aetrix Electronics and suitable for automotive ECU power management, sensor biasing, ADC reference design, and infotainment overvoltage protection requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX384-B6V8-Q 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for stable voltage reference and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX384-B6V8-Q has no specified maximum continuous reverse current; its regulation is defined at IZ = 5 mA, but it can sustain up to 250 mA forward current. For reverse-biased operation, continuous current must be limited by external series resistance to maintain Ptot ≤ 300 mW - typically ≤44 mA at 6.8 V to stay within derated power at elevated ambient temperatures.
Is this diode suitable for bidirectional ESD protection?
No - the BZX384-B6V8-Q is a unidirectional Zener diode optimized for reverse-bias regulation only. Its forward voltage is ~0.9 V at 10 mA, and it lacks symmetric clamping behavior. For bidirectional ESD protection, dedicated TVS diodes such as PESD5V0S1BA should be used instead.
How does the +1.2 mV/K temperature coefficient affect circuit performance?
The +1.2 mV/K coefficient means the breakdown voltage increases by ~1.2 mV per °C rise in junction temperature. Over a −40 °C to +125 °C range, this results in ~197 mV total drift - critical in precision references but manageable in clamping applications where absolute accuracy is secondary to threshold consistency.
Can this part replace older BZX384-B6V8 variants without layout changes?
Yes - the BZX384-B6V8-Q uses the identical SOD323 package, pinout, and solder footprint as legacy BZX384-B6V8 parts. It adds AEC-Q101 qualification and updated thermal characterization but maintains full mechanical and electrical compatibility with existing PCB designs and reflow profiles.
BZX384-B6V8-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B6V8-QX FAQ
1.How can I place an order for BZX384-B6V8-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B6V8-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 BZX384-B6V8-QX reliable?
The price and inventory of BZX384-B6V8-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B6V8-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B6V8-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B6V8-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B6V8-QX?
BZX384-B6V8-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B6V8-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 BZX384-B6V8-QX?
For technical support, including BZX384-B6V8-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B6V8-QX requirements.
6.How does Aetrix verify that BZX384-B6V8-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-B6V8-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 BZX384-B6V8-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B6V8-QX?
All BZX384-B6V8-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B6V8-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 BZX384-B6V8-QX part is unused and in its original packaging.
Return procedure for BZX384-B6V8-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B6V8-QX Tags
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