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Nexperia USA Inc. BZX384-C4V3-QX
- Part No.:
- BZX384-C4V3-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C4V3-QX.pdf
- Description:
- DIODE ZENER 4.3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,119
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Product details
Overview
BZX384-C4V3-Q from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 4.3 V nominal breakdown at 5 mA, with 300 mW total power dissipation and qualified to AEC-Q101 for automotive use. It provides stable reference voltage in low-power biasing, overvoltage protection, and signal clamping circuits.
For engineers reviewing the BZX384-C4V3-Q datasheet, BZX384-C4V3-Q pinout, BZX384-C4V3-Q application, or BZX384-C4V3-Q equivalent, this page delivers verified electrical parameters, thermal resistance values, reverse current limits at 1 V and 4 V, differential resistance, temperature coefficient, and automotive qualification status - all confirmed from Nexperia's official 2021 product data sheet.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain a stable 4.3 V reference across load variations and temperature shifts. Its ±5 % tolerance (C-series), 90 Ω typical differential resistance at 5 mA, and −3.5 to 0.0 mV/K temperature coefficient enable predictable regulation in cost-sensitive automotive and industrial subsystems.
Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it supports pulsed non-repetitive peak reverse power up to 40 W (100 μs, Tj = 25 °C) and features cathode-marked polarity with 415 K/W junction-to-ambient thermal resistance in free air.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 4.00 V to 4.60 V at IZ = 5 mA - defines usable regulation window under standard test conditions |
| Differential Resistance rdif | 90 Ω max at IZ = 5 mA - determines output impedance and regulation sensitivity to current changes |
| Reverse Current IR | 3 μA max at VR = 1 V - ensures low leakage before breakdown onset |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - specifies conduction loss during forward-biased operation |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C on standard FR4 PCB - sets continuous DC power handling limit |
| Junction Temperature Tj | −65 °C to +150 °C - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for stress testing per Automotive Electronics Council standard for discrete semiconductors |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias polarity required for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including high-temperature operating life and humidity robustness |
| ±5 % voltage tolerance (C-series) | Cost-optimized regulation accuracy suitable for non-critical biasing and clamping functions |
| 300 mW power rating | Enables use in space-constrained PCB layouts without heatsinking in low-current applications |
| 40 W non-repetitive surge capability | Provides transient overvoltage immunity against ESD and load-dump events in automotive ECUs |
| SOD323 footprint compatibility | Standardized 1.35 mm × 0.85 mm land pattern supports automated reflow and wave soldering |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference for microcontroller ADC input scaling in door module power management. IC Role / Device Role / Timing Role: Zener diode provides stable 4.3 V reference to calibrate analog sensor readings against supply variation. Use Value: Maintains <±1.5% measurement accuracy across −40 °C to +125 °C ambient due to AEC-Q101 thermal validation and low tempco. |
Use Scenario: Clamp circuit protecting op-amp inputs from transient overvoltage in 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Reverse-biased Zener limits input swing to 4.3 V, preventing op-amp saturation or damage. Use Value: 40 W surge rating absorbs 100 μs transients without degradation, ensuring long-term reliability in factory floor environments. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Biasing |
Use Scenario: Secondary-side voltage reference in flyback converter feedback network for USB-C PD adapters. IC Role / Device Role / Timing Role: Sets regulation threshold for optocoupler-driven control loop; replaces higher-cost precision references. Use Value: ±5 % tolerance meets Class VI efficiency requirements while reducing BOM cost versus ±1 % variants. |
Use Scenario: Stable bias voltage for photodiode amplifier stages in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Supplies clean 4.3 V reference to low-noise op-amps, minimizing baseline drift in analog signal chain. Use Value: 3 μA max reverse leakage at 1 V prevents loading of high-impedance sensor nodes, preserving SNR. |
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 (vs. ±5 %); 60 Ω max rdif at 5 mA (vs. 90 Ω) | Higher accuracy needed for precision reference; tighter regulation under varying load | Select when system-level calibration requires <±20 mV absolute voltage error at 5 mA |
| MMSZ4V3T1G | ±5 % tolerance; 500 mW Ptot; SOD-123 package (larger footprint) | Higher power handling; less space-efficient; not AEC-Q101 qualified | Choose only if 300 mW is insufficient and automotive qualification is not required |
Compared with BZX384-B4V3-Q, this part trades regulation accuracy and lower dynamic impedance for lower cost and sufficient stability in non-critical bias networks; compared with MMSZ4V3T1G, it offers automotive qualification and smaller footprint but reduced power headroom.
Availability
BZX384-C4V3-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapter feedback loops, and medical diagnostic equipment requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX384-C4V3-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 leading Dutch semiconductor manufacturer specializing in high-volume logic, analog, and discrete components, with global manufacturing and R&D centers.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for reliable voltage reference and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage before breakdown for BZX384-C4V3-Q?
The device exhibits less than 3 μA reverse current at 1 V and remains below 5 μA up to 4 V, with nominal breakdown occurring between 4.00 V and 4.60 V at 5 mA test current. This controlled knee ensures predictable turn-on behavior in clamping applications without premature conduction.
Can BZX384-C4V3-Q be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. For >300 mW requirements, select a single higher-power device such as PZM4.3NB or use active regulation instead.
Is the SOD323 package compatible with standard reflow profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The recommended footprint uses 0.5 mm wide × 1.15 mm long solder lands with 0.6 mm spacing, supporting both leaded and lead-free processes without tombstoning or voiding.
How does the temperature coefficient affect regulation stability over automotive temperature range?
With a specified SZ of −3.5 to 0.0 mV/K at 5 mA, the 4.3 V nominal VZ shifts by approximately −18 mV to +0 mV from 25 °C to 125 °C - a total drift of <±0.42 %, well within tolerance bands for non-precision biasing and clamping functions in automotive modules.
BZX384-C4V3-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:
- ±5%
- 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-C4V3-QX FAQ
1.How can I place an order for BZX384-C4V3-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C4V3-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-C4V3-QX reliable?
The price and inventory of BZX384-C4V3-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-C4V3-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C4V3-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C4V3-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C4V3-QX?
BZX384-C4V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C4V3-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-C4V3-QX?
For technical support, including BZX384-C4V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C4V3-QX requirements.
6.How does Aetrix verify that BZX384-C4V3-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C4V3-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-C4V3-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C4V3-QX?
All BZX384-C4V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C4V3-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-C4V3-QX part is unused and in its original packaging.
Return procedure for BZX384-C4V3-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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