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Nexperia USA Inc. BZX384-A30X
- Part No.:
- BZX384-A30X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A30X.pdf
- Description:
- DIODE ZENER 30V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,172
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Product details
Overview
BZX384-A30X from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 30 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision reference or overvoltage clamp in low-power analog supply rails and sensor biasing circuits.
For engineers reviewing the BZX384-A30X datasheet, BZX384-A30X pinout, BZX384-A30X application, or BZX384-A30X equivalent, key selection criteria include its 30 V Zener voltage with ±1 % tolerance, 300 mW steady-state power rating, 40 W surge capability, and thermal resistance of 110 K/W to solder point - critical for compact PCB designs requiring stable voltage references under transient conditions.
Technical Context
This device operates in reverse-biased Zener breakdown mode, delivering a stable 30 V reference across a 1 mA to 20 mA working current range. Its differential resistance is ≤300 Ω at IZ = 5 mA, and temperature coefficient is +21 mV/K at IZ = 2 mA, indicating positive drift optimized for mid-voltage regulation.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it features cathode-marked polarity (bar marking), junction-to-solder-point thermal resistance of 110 K/W, and supports reflow/wave soldering per JEDEC standards - enabling reliable integration into space-constrained consumer and industrial control boards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal at IZ = 5 mA; ±1 % tolerance ensures tight reference accuracy for feedback loops. |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C; defines maximum continuous DC power handling on standard FR4 PCB. |
| Peak Reverse Power (PZSM) | 40 W for tp = 100 μs; enables robust transient overvoltage clamping without failure. |
| Differential Resistance (rdif) | ≤300 Ω at IZ = 5 mA; low impedance maintains regulation stability under load variation. |
| Reverse Current (IR) | ≤0.1 μA at VR = 24 V; minimal leakage preserves battery life in always-on monitoring circuits. |
| Temperature Coefficient (SZ) | +21 mV/K at IZ = 2 mA; predictable positive drift allows compensation in temperature-sensitive references. |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA; enables use as low-drop rectifier or ESD protection element in dual-role designs. |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by a bar on the body. Dimensions: 1.8 mm × 1.35 mm × 0.95 mm (L × W × H); compatible with standard reflow footprints per Figure 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; marked by bar; connects to regulated output node or ground return in shunt configuration. |
| 2 | Anode (A) | Positive terminal; ties to unregulated input rail; reverse-biased during Zener operation. |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in 3.3 V/5 V/12 V supply monitoring. |
| 300 mW total power rating | Supports continuous regulation in low-current applications such as microcontroller reset circuits and ADC reference buffers. |
| 40 W non-repetitive peak power | Withstands ESD events and line transients per IEC 61000-4-2 up to ±8 kV without degradation. |
| SOD323 footprint compatibility | Matches industry-standard 0805-equivalent land patterns, simplifying layout reuse and assembly logistics. |
| 150 °C maximum junction temperature | Permits operation in sealed enclosures or near heat sources without derating in ambient temperatures up to +125 °C. |
Applications
| Power Supply Monitoring | Sensor Biasing |
|---|---|
|
Use Scenario: Monitoring 24 V industrial PLC input voltage to detect brownout conditions before system reset. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 30 V threshold for comparator input. Use Value: ±1 % tolerance ensures detection window stays within ±0.3 V, preventing false triggers during nominal ripple. |
Use Scenario: Providing precise 30 V bias to a photodiode amplifier in optical smoke detector circuitry. IC Role / Device Role / Timing Role: Voltage reference establishing fixed reverse-bias potential across photodiode junction. Use Value: Low 0.1 μA leakage at 24 V minimizes dark current error, improving signal-to-noise ratio by >15 dB. |
| Microcontroller Reset Circuit | Overvoltage Clamp |
|
Use Scenario: Generating clean reset pulse for ARM Cortex-M0+ MCU when main 3.3 V rail drops below 2.9 V. IC Role / Device Role / Timing Role: Zener-based voltage divider feeding RC network to reset IC input. Use Value: 300 mW rating allows sustained operation during extended brownouts without thermal runaway. |
Use Scenario: Protecting CAN transceiver inputs from 48 V automotive load-dump spikes in telematics modules. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting surge energy to ground via series resistor. Use Value: 40 W peak power rating absorbs 100 μs surges up to 60 V without parametric shift or bond-wire fusing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5260B | 30 V, ±5 % tolerance, 350 mW Ptot, SOT-23 package | Higher power but looser tolerance; requires larger board area and less precision | Select when cost sensitivity outweighs voltage accuracy and board space is available. |
| Vishay BZX384-C30 | 30 V, ±5 % tolerance, same SOD323 package, 300 mW rating | Same footprint but wider tolerance increases reference uncertainty by ±1.5 V | Choose only for non-critical clamping where 30 V ±1.5 V is acceptable. |
Compared with BZX384-A30X, MMBZ5260B offers higher steady-state power but sacrifices accuracy and miniaturization, while BZX384-C30 retains size and thermal performance but degrades regulation precision - making the A-grade version optimal for designs demanding both compactness and ±0.3 V reference stability.
Availability
BZX384-A30X is available at Aetrix Electronics and suitable for power supply monitoring, sensor biasing, microcontroller reset circuits, and overvoltage clamping requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZX384-A30X 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, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered specifically for low-power voltage reference and protection functions in space-constrained consumer, industrial, and communication equipment.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX384-A30X is rated for a maximum continuous reverse current of 250 mA, as defined in its Absolute Maximum Ratings table. This value assumes operation within the specified ambient temperature range and proper PCB thermal management - exceeding it risks junction overheating and permanent parameter shift.
Can this Zener diode be used in series for higher voltage references?
No - the BZX384-A30X is not characterized or guaranteed for series operation. Its temperature coefficient (+21 mV/K) and tolerance stack non-linearly, and thermal coupling between devices causes mismatched drift. For >30 V references, use a single higher-voltage Zener or active reference IC instead.
Is the SOD323 package compatible with automated optical inspection (AOI)?
Yes - the SOD323 package has standardized dimensions (1.8 mm × 1.35 mm) and visible cathode marking bar, enabling reliable AOI detection during SMT assembly. Its flat, coplanar leads and consistent solder joint geometry meet IPC-A-610 Class 2 requirements for automated inspection systems.
Does this part meet RoHS and REACH compliance?
Yes - the BZX384-A30X is RoHS-compliant (lead-free, homogeneous material restriction) and REACH-conformant per Nexperia's published declarations. It carries the "Green" designation in Nexperia's environmental compliance database and is exempt from conflict minerals reporting under current EU regulations.
BZX384-A30X 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):
- 30 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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-A30X FAQ
1.How can I place an order for BZX384-A30X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A30X 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-A30X reliable?
The price and inventory of BZX384-A30X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A30X is usually 5 days.
3.What payment methods are accepted for BZX384-A30X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A30X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A30X?
BZX384-A30X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A30X 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-A30X?
For technical support, including BZX384-A30X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A30X requirements.
6.How does Aetrix verify that BZX384-A30X is sourced from the original manufacturer or authorized distributors?
All BZX384-A30X 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-A30X meets industry standards.
7.What is the process for return or replacement of BZX384-A30X?
All BZX384-A30X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A30X, 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-A30X part is unused and in its original packaging.
Return procedure for BZX384-A30X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A30X Tags
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