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Nexperia USA Inc. BZX384-A4V7X
- Part No.:
- BZX384-A4V7X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A4V7X.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,242
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Product details
Overview
BZX384-A4V7X from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, providing precise 4.7 V reverse breakdown at 5 mA with 3 μA max reverse leakage at 3.7 V and 500 Ω max differential resistance. It delivers stable reference voltage for low-power analog circuits, power supply feedback loops, and overvoltage protection in consumer and industrial PCBs.
For engineers reviewing the BZX384-A4V7X datasheet, BZX384-A4V7X pinout, BZX384-A4V7X application, or BZX384-A4V7X equivalent, this page provides verified Zener voltage, tolerance, thermal resistance, reverse leakage, and cathode/anode terminal mapping - all confirmed from Nexperia's Rev. 4 product data sheet (Jan 2023).
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining regulation by conducting reverse current above its specified Zener voltage (4.65–4.75 V at IZ = 5 mA). Its ±1 % tolerance and low temperature coefficient (−3.5 to +0.2 mV/K) enable high-accuracy biasing in precision comparators and ADC reference buffers.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it supports continuous dissipation up to 300 mW at Tamb ≤ 25 °C and withstands non-repetitive surges of 40 W (100 μs pulse), making it suitable for transient suppression in low-energy signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.65 V to 4.75 V at IZ = 5 mA - defines tight regulation window for reference stability |
| Tolerance | ±1 % - enables high-accuracy voltage clamping without post-production trimming |
| Differential Resistance (rdif) | ≤500 Ω - ensures minimal output voltage shift under load current variation |
| Reverse Leakage (IR) | ≤3 μA at VR = 3.7 V - guarantees low quiescent current in standby mode |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB |
| Junction-to-Ambient Rth(j-a) | 415 K/W - determines thermal rise per watt on unmodified FR4 layout |
| Non-repetitive Peak Power | 40 W (100 μs pulse) - supports ESD/inductive spike absorption without failure |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar; footprint optimized for reflow soldering per Nexperia Fig. 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to circuit ground or lower potential; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD323 outline (1.35 × 1.75 mm) enables high-density routing in space-constrained designs |
| Precision voltage reference | ±1 % tolerance ensures <±47 mV error at 4.7 V - critical for 12-bit ADC references |
| Controlled thermal performance | Rth(j-sp) = 110 K/W to cathode solder point allows accurate junction temperature estimation |
| Robust surge capability | Withstands 6.0 A non-repetitive peak reverse current - protects against 1 kV ESD events per IEC 61000-4-2 |
| Low capacitance | 300 pF at 0 V - minimizes signal distortion in RF bias networks and high-speed comparator inputs |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck converter feedback loop using optocoupler-coupled TL431 alternative. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.7 V threshold to drive optocoupler LED. Use Value: ±1 % tolerance eliminates need for external trim pot, reducing BOM count and calibration steps. |
Use Scenario: Protecting microcontroller GPIO pins from accidental 5 V rail overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Low-capacitance clamp diverting excess energy to ground before input stage damage. Use Value: 300 pF capacitance avoids signal integrity degradation on 10 MHz digital lines. |
| ADC Reference Buffer | Comparator Hysteresis Bias |
Use Scenario: Generating clean 4.7 V reference for 12-bit SAR ADC in battery-powered sensor node. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing higher-cost bandgap ICs. Use Value: −3.5 to +0.2 mV/K tempco ensures <±1 LSB drift across −40 °C to +85 °C operating range. |
Use Scenario: Setting hysteresis thresholds in window comparator for AC mains zero-crossing detection. IC Role / Device Role / Timing Role: Dual-Zener pair (with second device) establishing precise upper/lower trip points. Use Value: 500 Ω rdif maintains consistent hysteresis width despite supply ripple up to 100 mVpp. |
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-B4V7 | ±2 % tolerance (4.61–4.79 V), same package and Ptot | Acceptable where 12-bit accuracy not required; lower cost tier | Select when system-level calibration compensates for wider voltage spread |
| MMSZ4700T1G | ±5 % tolerance (4.47–4.94 V), SOD-123 package, 500 mW Ptot | Higher power margin but larger footprint and looser regulation | Choose only if board layout permits larger package and thermal design accommodates 200 mW extra dissipation |
Compared with BZX384-A4V7X, the BZX384-B4V7 trades 1 % precision for broader availability and lower unit cost, while MMSZ4700T1G sacrifices accuracy and size efficiency for higher surge robustness - making the A-grade part optimal for compact, high-accuracy analog subsystems.
Availability
BZX384-A4V7X is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and ADC reference buffer applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for BZX384-A4V7X 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The BZX384 series belongs to Nexperia's precision Zener diode portfolio, engineered specifically for low-power voltage regulation and reference functions in consumer, industrial, and communication equipment where size, accuracy, and thermal predictability are critical.
FAQ
What is the maximum continuous forward current for BZX384-A4V7X?
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 thermal runaway. Forward voltage is specified only for test conditions (0.9 V at 10 mA pulse), not steady-state use.
Can BZX384-A4V7X be used in automotive applications?
No - this part is explicitly non-automotive qualified per Nexperia's Rev. 4 datasheet revision history. It lacks AEC-Q200 stress testing and automotive-grade process controls. For automotive use, Nexperia offers separate -Q qualified variants (e.g., BZX384-A4V7-Q), which must be sourced separately and verified for TS 16949 compliance.
How does thermal resistance affect regulation accuracy in real-world PCB layouts?
Rth(j-a) = 415 K/W assumes standard FR4 with single-sided copper and tin plating. In practice, adding thermal vias under the cathode pad reduces effective Rth by ~30 %, lowering junction temperature rise and stabilizing VZ - especially important where ambient exceeds 60 °C or power dissipation approaches 200 mW.
Is the marking code "22" on BZX384-A4V7X device body standardized across reels and batches?
Yes - per Table 4 of the datasheet, "22" is the exclusive marking code for BZX384-A4V7X across all production lots. The cathode bar is always adjacent to pin 1, and no alternate markings or date codes override this identifier. Visual inspection of the bar + "22" confirms authenticity without electrical test.
BZX384-A4V7X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 78 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A4V7X FAQ
1.How can I place an order for BZX384-A4V7X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A4V7X 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-A4V7X reliable?
The price and inventory of BZX384-A4V7X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A4V7X is usually 5 days.
3.What payment methods are accepted for BZX384-A4V7X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A4V7X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A4V7X?
BZX384-A4V7X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A4V7X 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-A4V7X?
For technical support, including BZX384-A4V7X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A4V7X requirements.
6.How does Aetrix verify that BZX384-A4V7X is sourced from the original manufacturer or authorized distributors?
All BZX384-A4V7X 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-A4V7X meets industry standards.
7.What is the process for return or replacement of BZX384-A4V7X?
All BZX384-A4V7X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A4V7X, 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-A4V7X part is unused and in its original packaging.
Return procedure for BZX384-A4V7X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A4V7X Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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onsemi
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MMSZ5245BS-7-F
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SMAZ12-13-F
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