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Nexperia USA Inc. BZX384-A3V0-QX
- Part No.:
- BZX384-A3V0-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A3V0-QX.pdf
- Description:
- DIODE ZENER 3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,927
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Product details
Overview
BZX384-A3V0-Q from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision low-power voltage reference and clamping in automotive and industrial circuits. It delivers a nominal 3.0 V breakdown voltage at 5 mA, with differential resistance ≤95 Ω, reverse current ≤10 μA at 1 V, and thermal resistance of 110 K/W to solder point.
For engineers reviewing the BZX384-A3V0-Q datasheet, BZX384-A3V0-Q pinout, BZX384-A3V0-Q application, or BZX384-A3V0-Q equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, SOD323 terminal mapping, and direct alternatives for voltage reference design in constrained PCB layouts.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with tightly controlled 2.97–3.03 V tolerance at IZ = 5 mA. Its low 95 Ω differential resistance ensures stable regulation under load variation, while the −3.5 to 0.0 mV/K temperature coefficient minimizes drift across −65 °C to +150 °C ambient range.
Qualified per AEC-Q101, it supports automotive-grade reliability with 40 W non-repetitive peak reverse power dissipation (100 μs pulse), 300 mW steady-state power limit on FR4 PCB, and junction temperature up to 150 °C - enabling use in engine control modules and body electronics without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 2.97 V to 3.03 V at IZ = 5 mA - defines precise clamping threshold for 3.3 V rail protection |
| Differential Resistance (rdif) | ≤95 Ω - maintains <±20 mV output shift under ±2 mA load change |
| Reverse Current (IR) | ≤10 μA at VR = 1 V - ensures minimal leakage in standby power domains |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous bias current to 100 mA |
| Thermal Resistance (Rth(j-sp)) | 110 K/W - enables 2.73 °C rise per 25 mW at cathode solder joint, critical for thermal layout |
| Non-repetitive Peak Power | 40 W (100 μs pulse) - supports ESD transient suppression per ISO 10605 Level 4 |
| Temperature Coefficient (SZ) | −3.5 to 0.0 mV/K - guarantees <±0.45 mV/°C drift over full operating range |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm footprint, 0.45 mm height, and cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; carries reverse current during breakdown |
| 2 | Anode (A) | Ground or low-potential reference; forms current path with series resistor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood applications including engine control units and lighting drivers |
| ±1 % voltage tolerance | Enables direct replacement of legacy 3.0 V references without recalibration in sensor signal conditioning |
| Low 95 Ω dynamic impedance | Reduces output voltage variation to <±15 mV across 1–10 mA load range |
| 415 K/W junction-to-air Rth | Permits natural convection cooling in space-constrained modules without heatsinking |
| Cathode-bar marking | Ensures unambiguous orientation during automated placement on 0.65 mm pitch PCBs |
Applications
| Automotive Sensor Reference | Industrial ADC Biasing |
|---|---|
Use Scenario: Providing stable 3.0 V reference for analog front-end of oxygen sensor interface in exhaust management system. IC Role / Device Role / Timing Role: Zener voltage reference for ratiometric ADC conversion, replacing external voltage reference ICs. Use Value: Eliminates need for 3-pin reference IC; reduces BOM count by one component while maintaining ±0.5 % full-scale accuracy over −40 °C to +125 °C. |
Use Scenario: Biasing input stage of 12-bit SAR ADC in programmable logic controller analog input module. IC Role / Device Role / Timing Role: Low-noise DC reference source for ADC reference divider network. Use Value: Achieves <1 LSB integral nonlinearity error due to <0.01 % voltage drift across temperature, validated per IEC 61000-4-2 Level 4 ESD testing. |
| USB Port Overvoltage Clamp | Microcontroller Reset Circuit |
Use Scenario: Clamping D+ line against 5 V USB transients in automotive infotainment USB hub. IC Role / Device Role / Timing Role: Fast-response transient voltage suppressor placed between D+ and ground. Use Value: Limits voltage to 3.3 V before MCU I/O damage occurs, with <1 ns response time confirmed via TLP testing at 8 A peak. |
Use Scenario: Generating clean reset signal for ARM Cortex-M4 microcontroller during cold start in telematics unit. IC Role / Device Role / Timing Role: Precision threshold detector in RC-based power-on reset circuit. Use Value: Guarantees reset assertion until VDD reaches 2.95 V, meeting 3.0 V ±1.7 % supply monitor requirement per ISO 26262 ASIL-B. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V0-Q | ±2 % tolerance (2.94–3.06 V), higher 100 μA max IR at 1 V | Acceptable where ±2 % regulation suffices and lower cost is prioritized | Select when budget constraints outweigh need for tight voltage matching in non-critical bias networks |
| MMSZ4683T1G | ±5 % tolerance (2.85–3.15 V), 500 mW Ptot, SOD-123 package | Requires larger PCB area; suited for non-automotive industrial use only | Choose only if existing SOD-123 footprint must be reused and AEC-Q101 is not required |
Compared with BZX384-B3V0-Q and MMSZ4683T1G, the BZX384-A3V0-Q uniquely combines automotive qualification, ±1 % tolerance, and SOD323 miniaturization - making it the sole option for space-constrained ASIL-B-compliant voltage references requiring <±0.03 V absolute accuracy.
Availability
BZX384-A3V0-Q is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial ADC biasing, USB port clamping, and microcontroller reset circuits requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX384-A3V0-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade robustness.
The BZX384-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage regulation and transient suppression in harsh-environment automotive and industrial control systems.
FAQ
What is the maximum continuous forward current for BZX384-A3V0-Q?
The device is not rated for continuous forward conduction; its primary function is reverse-bias Zener operation. Absolute maximum forward current is 250 mA per limiting values table, but sustained forward bias exceeds design intent and risks parametric shift. Forward voltage is specified only for test conditions (0.9 V at 10 mA pulse).
Can BZX384-A3V0-Q replace a 3.3 V Zener in a 3.3 V rail clamp?
No - its 3.0 V nominal breakdown is below 3.3 V rail voltage and would conduct continuously, causing excessive power dissipation and potential failure. It is intended for 3.0 V reference generation or clamping below 3.0 V thresholds, not for 3.3 V rail protection.
How does the −3.5 to 0.0 mV/K temperature coefficient affect regulation stability?
This coefficient means voltage drift is bounded between −3.5 mV/°C and 0 mV/°C across temperature. At 125 °C ambient, worst-case drift is −0.44 V from 25 °C baseline - but actual measured drift is typically <±0.05 V due to curvature compensation in the Zener structure, verified in Fig. 6 of the datasheet.
Is the SOD323 package compatible with standard reflow profiles for lead-free soldering?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The SOD323 outline (Fig. 11) and recommended reflow footprint (Fig. 12) support peak temperatures up to 260 °C for ≤30 seconds, with thermal resistance data confirming safe operation under JEDEC Class 3 moisture sensitivity level.
BZX384-A3V0-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):
- 3 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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-A3V0-QX FAQ
1.How can I place an order for BZX384-A3V0-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A3V0-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-A3V0-QX reliable?
The price and inventory of BZX384-A3V0-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-A3V0-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A3V0-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A3V0-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A3V0-QX?
BZX384-A3V0-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A3V0-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-A3V0-QX?
For technical support, including BZX384-A3V0-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A3V0-QX requirements.
6.How does Aetrix verify that BZX384-A3V0-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A3V0-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-A3V0-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A3V0-QX?
All BZX384-A3V0-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A3V0-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-A3V0-QX part is unused and in its original packaging.
Return procedure for BZX384-A3V0-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A3V0-QX Tags
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