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Nexperia USA Inc. BZX384-A8V2-QX
- Part No.:
- BZX384-A8V2-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A8V2-QX.pdf
- Description:
- DIODE ZENER 8.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,305
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Product details
Overview
BZX384-A8V2-Q from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 8.2 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-A8V2-Q datasheet, BZX384-A8V2-Q pinout, BZX384-A8V2-Q application, or BZX384-A8V2-Q equivalent, this part serves as a precision low-power shunt regulator in ECU power rails, sensor biasing networks, and ADC reference stabilization where tight voltage tolerance and automotive-grade reliability are required.
Technical Context
This device operates in reverse-biased Zener breakdown mode with a specified 8.2 V working voltage at IZ = 5 mA, differential resistance of ≤80 Ω, and temperature coefficient of +3.2 to +6.2 mV/K - indicating positive thermal drift optimized for stable regulation across -65 °C to +150 °C ambient range.
It supports non-repetitive peak reverse power dissipation up to 40 W (100 μs pulse), reverse current <0.7 μA at VR = 7.3 V, and junction-to-ambient thermal resistance of 415 K/W on standard FR4 PCB - confirming suitability for transient suppression and low-duty-cycle clamping in compact automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 8.11 V to 8.29 V at IZ = 5 mA - ensures ±1 % tolerance for precise voltage reference in feedback loops |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - defines continuous DC regulation capability on standard PCB layout |
| Differential Resistance | ≤80 Ω at IZ = 5 mA - determines output impedance and load regulation error under varying current |
| Reverse Current | ≤0.7 μA at VR = 7.3 V - guarantees low leakage in high-impedance bias networks |
| Temp. Coefficient | +3.2 to +6.2 mV/K - quantifies voltage drift per degree, critical for temperature-stable references |
| Non-rep. Peak Power | 40 W (100 μs) - enables transient overvoltage clamping without failure |
| Junction Temp. Max | 150 °C - sets maximum operating temperature for under-hood automotive placement |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2-terminal, cathode-marked with bar, 2.7 mm × 1.6 mm footprint, 0.45 mm height, designed for reflow/wave soldering per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias polarity must be maintained for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD testing per discrete semiconductor stress requirements |
| ±1 % voltage tolerance | Enables direct replacement of higher-cost references in cost-sensitive ECU voltage monitoring paths |
| Low differential resistance | 80 Ω max ensures <1 % output deviation across 1–10 mA load variation in shunt regulator configurations |
| High surge robustness | 40 W non-repetitive peak power rating allows absorption of ISO 7637-2 pulse 1/2a transients without degradation |
| SOD323 footprint | Standardized 2.7 × 1.6 mm outline enables automated placement and compatibility with legacy PCB tooling |
Applications
| Engine Control Unit (ECU) Reference | Automotive Sensor Biasing |
|---|---|
Use Scenario: Providing stable 8.2 V reference for microcontroller ADC input scaling and internal LDO feedback. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining accuracy across engine bay temperature swings (-40 °C to +125 °C). Use Value: Enables ±0.5 % analog measurement repeatability in fuel injection timing control without external trimming. |
Use Scenario: Biasing pressure and temperature sensors in HVAC and brake systems requiring stable excitation voltage. IC Role / Device Role / Timing Role: Precision Zener clamp ensuring constant 8.2 V supply to bridge-based sensor elements. Use Value: Reduces sensor offset drift by >40 % compared to ±5 % tolerance alternatives under thermal cycling. |
| Infotainment Power Sequencing | Body Control Module (BCM) Overvoltage Protection |
Use Scenario: Regulating auxiliary 8.2 V rail for display backlight drivers and audio codec power domains. IC Role / Device Role / Timing Role: Low-noise voltage reference stabilizing switching regulator feedback divider network. Use Value: Suppresses ripple-induced audio artifacts by maintaining <2 mVpp reference noise floor at 100 kHz. |
Use Scenario: Clamping LIN bus transceiver supply against load-dump transients in door module designs. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing 40 W surges within 100 μs. Use Value: Prevents transceiver latch-up during ISO 16750-2 test pulses without requiring series resistors or TVS co-location. |
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-B8V2-Q | ±2 % tolerance (8.04–8.36 V), higher rdif (≤150 Ω), same package and AEC-Q101 rating | Acceptable where system-level calibration compensates for wider voltage spread | Select when cost reduction outweighs need for tighter initial accuracy |
| MMSZ4689T1G | ±5 % tolerance (7.7–8.7 V), 500 mW Ptot, SOD-123 package, AEC-Q101 qualified | Higher power handling but larger footprint; less precise for reference-critical nodes | Choose for higher continuous dissipation needs where board space permits SOD-123 |
Compared with BZX384-B8V2-Q and MMSZ4689T1G, the BZX384-A8V2-Q delivers the narrowest voltage tolerance and lowest dynamic impedance in the smallest qualified footprint - making it optimal for space-constrained, high-accuracy automotive voltage references where initial calibration margin is limited.
Availability
BZX384-A8V2-Q is available at Aetrix Electronics and suitable for automotive ECU design, sensor interface development, and body electronics production requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX384-A8V2-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 portfolio, engineered specifically for precision voltage regulation and transient protection in harsh-environment electronic control units.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX384-A8V2-Q is rated for a maximum forward current of 250 mA, but its continuous reverse (Zener) current is determined by power dissipation limits. At 25 °C ambient, with 300 mW Ptot and 8.2 V VZ, the safe continuous Zener current is approximately 36.6 mA - derated linearly above 25 °C using Rth(j-a) = 415 K/W.
How does the temperature coefficient affect regulation accuracy over automotive temperature ranges?
With a specified temperature coefficient of +3.2 to +6.2 mV/K, the BZX384-A8V2-Q exhibits predictable positive drift: voltage increases ~0.5 V from -40 °C to +125 °C. This behavior is well-characterized and compensated in automotive designs using lookup tables or analog correction circuits.
Can this diode replace older BZX55 or BZX79 series parts in legacy designs?
No - the BZX384-A8V2-Q uses SOD323 packaging and has different thermal characteristics, solder profile requirements, and lower power rating (300 mW vs. 500–1000 mW). Direct substitution requires PCB footprint redesign and thermal validation; it is not a drop-in replacement for through-hole or larger SMD Zeners.
Is the cathode marking consistent across all BZX384-Q variants?
Yes - all BZX384-Q series diodes use identical SOD323 packaging with a cathode bar marking on terminal 1, verified in Nexperia's package outline (Fig. 11) and pinning table. The marking code "28" on BZX384-A8V2-Q corresponds exclusively to the 8.2 V ±1 % variant and does not affect terminal identification.
BZX384-A8V2-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):
- 8.2 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 700 nA @ 5 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-A8V2-QX FAQ
1.How can I place an order for BZX384-A8V2-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A8V2-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-A8V2-QX reliable?
The price and inventory of BZX384-A8V2-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-A8V2-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A8V2-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A8V2-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A8V2-QX?
BZX384-A8V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A8V2-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-A8V2-QX?
For technical support, including BZX384-A8V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A8V2-QX requirements.
6.How does Aetrix verify that BZX384-A8V2-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A8V2-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-A8V2-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A8V2-QX?
All BZX384-A8V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A8V2-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-A8V2-QX part is unused and in its original packaging.
Return procedure for BZX384-A8V2-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A8V2-QX Tags
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