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Nexperia USA Inc. BZX384-A4V3-QX
- Part No.:
- BZX384-A4V3-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A4V3-QX.pdf
- Description:
- DIODE ZENER 4.3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,477
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Product details
Overview
BZX384-A4V3-Q from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 4.3 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-A4V3-Q datasheet, BZX384-A4V3-Q pinout, BZX384-A4V3-Q application, or BZX384-A4V3-Q equivalent, this part serves as a precision low-power shunt regulator with 3 Ω typical differential resistance, -3.5 mV/K temperature coefficient, and 450 pF capacitance - critical for stable biasing, ESD clamping, and feedback loop referencing in compact automotive and industrial PCBs.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable 4.3 V reference across its terminals under regulated current conditions. Its ±1 % tolerance and low 3 Ω differential resistance ensure tight voltage control in feedback networks and voltage-sensing paths.
Qualified per AEC-Q101, it supports junction temperatures from –65 °C to +150 °C and withstands non-repetitive 40 W peak reverse power surges (100 μs pulse), making it suitable for transient suppression in automotive power rails and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 4.25 V to 4.35 V at IZ = 5 mA - defines precise regulation point for feedback or reference use |
| Tolerance | ±1 % - enables high-accuracy voltage setting without trimming in production |
| Differential Resistance rdif | 90 Ω max at IZ = 5 mA - ensures minimal output voltage shift under load variation |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - sets thermal derating boundary for PCB layout and copper area planning |
| Reverse Current IR | 3 μA max at VR = 1 V - guarantees low leakage in high-impedance sensing nodes |
| Temperature Coefficient SZ | –3.5 mV/K at IZ = 5 mA - quantifies voltage drift over temperature for stability analysis |
| Non-repetitive Peak Power | 40 W (100 μs pulse) - supports surge immunity in 12 V automotive supply lines |
Pinout & Package
Two-terminal device in SOD323 (SC-76) surface-mount plastic package: 1.35 mm × 0.85 mm footprint, 0.45 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage node; reverse-bias anode-to-cathode establishes Zener conduction |
| 2 (A) | Anode | Typically tied to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and HAST testing |
| ±1 % voltage tolerance | Reduces need for post-production calibration in precision analog subsystems |
| Low 3 Ω typical rdif | Maintains <±10 mV output deviation across 1–10 mA operating range |
| 450 pF junction capacitance | Minimizes signal coupling in high-frequency feedback paths up to ~35 MHz |
| 150 °C max junction temperature | Enables operation in engine bay or under-hood modules without thermal shutdown |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 4.3 V reference for microcontroller ADC input scaling in door module voltage monitoring. IC Role / Device Role / Timing Role: Shunt voltage reference regulating bias for op-amp gain stage feeding MCU analog input. Use Value: ±1 % tolerance ensures <±5 LSB error across 12-bit ADC full scale at 125 °C ambient. |
Use Scenario: Clamping and level-shifting 0–5 V analog output from pressure transducer before isolation amplifier. IC Role / Device Role / Timing Role: Low-capacitance Zener clamp limiting signal swing to protect downstream circuitry. Use Value: 450 pF capacitance avoids phase shift >0.5° at 10 kHz signal bandwidth. |
| USB-C Power Delivery Feedback | Smart Meter Voltage Reference |
Use Scenario: Setting precise 4.3 V threshold for CC line voltage detection in USB-C port controller. IC Role / Device Role / Timing Role: Precision shunt regulator defining comparator trip point in PD communication interface. Use Value: –3.5 mV/K tempco limits threshold drift to <±12 mV over –40 to +85 °C operating range. |
Use Scenario: Generating stable reference for metrology-grade energy measurement IC in electricity meter. IC Role / Device Role / Timing Role: Primary voltage reference source for sigma-delta ADC reference divider network. Use Value: 90 Ω max rdif ensures <±0.5 mV output change when reference current varies ±0.5 mA. |
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-B4V3-Q | ±2 % tolerance, 90 Ω max rdif, identical package and thermal specs | Acceptable where tighter regulation not required; lower cost tier | Select when system-level calibration compensates for wider tolerance band |
| MMSZ4V3T1G | ±5 % tolerance, 100 Ω max rdif, SOD-123 package (larger footprint) | Higher power handling (500 mW), less space-constrained designs | Choose for legacy board reuse or higher surge margin where 0.8 mm × 1.6 mm footprint is acceptable |
Compared with BZX384-B4V3-Q and MMSZ4V3T1G, the BZX384-A4V3-Q delivers the tightest voltage accuracy in the smallest footprint, enabling miniaturized automotive modules where ±1 % reference stability directly improves sensor measurement fidelity without software compensation.
Availability
BZX384-A4V3-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C power delivery systems, and smart metering applications requiring stable component supply with AEC-Q101 compliance and traceable lot history.
Supply support for BZX384-A4V3-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.
The BZX384-Q series belongs to Nexperia's automotive-grade Zener regulator product line, engineered specifically for precision voltage reference and transient protection in harsh-environment electronic control units.
FAQ
What is the maximum continuous forward current rating for BZX384-A4V3-Q?
The device is not rated for continuous forward conduction; its primary function is reverse-biased Zener operation. Absolute maximum forward current is 250 mA per limiting values table, but sustained forward bias exceeds design intent and risks thermal runaway or parameter shift. It must be operated in reverse breakdown for regulation.
Can BZX384-A4V3-Q be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients and mismatched breakdown voltages, causing current hogging and thermal instability when paralleled. For higher power, use a single higher-rated Zener or active regulation; do not parallel BZX384-A4V3-Q units.
Is the cathode marking consistent across all BZX384-Q series variants?
Yes - all BZX384-Q series diodes use the same SOD323 package with cathode indicated by a bar on the top surface aligned with pin 1, confirmed in Figure 11 (package outline) and Table 2 (pinning information) of the official datasheet.
Does the ±1 % tolerance apply over the full operating temperature range?
No - the ±1 % tolerance is specified at Tj = 25 °C. Over –65 °C to +150 °C, voltage drift is governed by the –3.5 mV/K temperature coefficient; full-range variation exceeds ±1 % and must be calculated using SZ and ΔT for worst-case design margins.
BZX384-A4V3-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):
- 4.3 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 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-A4V3-QX FAQ
1.How can I place an order for BZX384-A4V3-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A4V3-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-A4V3-QX reliable?
The price and inventory of BZX384-A4V3-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-A4V3-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A4V3-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A4V3-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A4V3-QX?
BZX384-A4V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A4V3-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-A4V3-QX?
For technical support, including BZX384-A4V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A4V3-QX requirements.
6.How does Aetrix verify that BZX384-A4V3-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A4V3-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-A4V3-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A4V3-QX?
All BZX384-A4V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A4V3-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-A4V3-QX part is unused and in its original packaging.
Return procedure for BZX384-A4V3-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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