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Nexperia USA Inc. BZX384-A30-QX
- Part No.:
- BZX384-A30-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A30-QX.pdf
- Description:
- DIODE ZENER 30V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,985
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Product details
Overview
BZX384-A30-Q from Nexperia is a ±1 % tolerance Zener voltage regulator diode with 30 V nominal breakdown voltage, rated for 300 mW total power dissipation at 25 °C ambient, and qualified to AEC-Q101 for automotive use. It operates in reverse-biased regulation mode, providing stable reference voltage in low-power supply rails and overvoltage protection circuits.
For engineers reviewing the BZX384-A30-Q datasheet, BZX384-A30-Q pinout, BZX384-A30-Q application, or BZX384-A30-Q equivalent, key selection criteria include its 30 V Zener voltage at 2 mA test current, ±1 % tolerance, 300 mW steady-state power rating, 40 W non-repetitive surge capability, and SOD323 (SC-76) surface-mount package compatibility with automotive-grade thermal and reliability requirements.
Technical Context
This device functions as a precision shunt voltage reference, maintaining regulation across a 2 mA operating current with differential resistance of 300 Ω max and temperature coefficient of +0.05 mV/K. Its reverse leakage remains ≤80 μA at 25.2 V (0.9 × VZ), ensuring low quiescent error in bias networks.
The diode exhibits non-repetitive peak reverse current of 1.0 A at 100 μs pulse width, supported by 40 W surge power rating and junction-to-ambient thermal resistance of 415 K/W on FR4 PCB. It is fully specified from −65 °C to +150 °C ambient and qualified per AEC-Q101 stress tests for automotive under-hood deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 29.7 V to 30.3 V at IZ = 2 mA - tight ±1 % tolerance enables accurate voltage clamping in feedback loops |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power | 40 W at tp = 100 μs - supports transient overvoltage suppression without failure |
| Differential Resistance | ≤300 Ω at IZ = 2 mA - ensures minimal output voltage shift under load variation |
| Reverse Current | ≤80 μA at VR = 25.2 V - guarantees low standby leakage in always-on regulation paths |
| Junction Temperature Range | −65 °C to +150 °C - validated operation across full automotive under-hood thermal envelope |
| AEC-Q101 Qualified | Yes - certified for automotive applications including engine control, body electronics, and ADAS sensors |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar on top surface. Dimensions: 1.8 mm × 1.35 mm × 0.95 mm (L × W × H), lead pitch 1.15 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode connection point for voltage clamping |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt regulation path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables direct replacement in high-accuracy reference designs without recalibration |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, HAST, and ESD testing |
| 300 mW power rating at 25 °C | Supports stable regulation in space-constrained PCB layouts with minimal heatsinking |
| 40 W non-repetitive surge capability | Withstands ISO 7637-2 pulse 1/2a/3a transients in 12 V vehicle systems |
| SOD323 footprint compatibility | Matches industry-standard reflow and wave soldering profiles per JEDEC J-STD-020 |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference for analog-to-digital converter (ADC) inputs monitoring door lock status, window position, and mirror actuation signals. IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 30 V rail for op-amp biasing and ADC reference scaling. Use Value: ±1 % tolerance ensures <0.3 V absolute error in 30 V reference, meeting ASIL-B functional safety margin for non-safety-critical sensing. |
Use Scenario: Overvoltage clamp protecting 24 V industrial IO module inputs from field-wiring transients. IC Role / Device Role / Timing Role: Fast-acting shunt regulator absorbing surge energy before it reaches downstream protection ICs. Use Value: 40 W non-repetitive peak power rating handles 100 μs surges up to 30 V × 1.33 A without degradation, exceeding IEC 61000-4-4 Level 3 requirements. |
| Automotive Lighting Driver Feedback | Consumer Power Supply Reference |
Use Scenario: Regulation of feedback voltage in constant-current LED driver for adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: Precision Zener setting current-sense amplifier reference to maintain ±3 % LED current accuracy. Use Value: 300 Ω max differential resistance minimizes current error drift across 0–85 °C ambient, preserving luminance stability. |
Use Scenario: Low-cost voltage reference in USB-C PD adapter auxiliary supply for controller biasing. IC Role / Device Role / Timing Role: Standby-mode shunt regulator maintaining 30 V rail during no-load conditions. Use Value: ≤80 μA reverse leakage at 25.2 V reduces no-load power loss below 2 mW, supporting Energy Star Tier 2 efficiency targets. |
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-B30-Q | ±2 % tolerance (29.4–30.6 V), same package and power rating | Acceptable where tighter regulation not required; lower cost tier | Select when system-level calibration compensates for wider voltage spread |
| MMSZ5257ET1G | ±5 % tolerance (28.5–31.5 V), SOD-123 package, 500 mW rating | Higher power but looser tolerance; larger footprint | Choose only if board layout allows SOD-123 and thermal margin exceeds 300 mW |
Compared with BZX384-B30-Q, the A30-Q offers 2× tighter voltage tolerance critical for uncalibrated references; versus MMSZ5257ET1G, it trades 200 mW headroom for 50 % smaller footprint and guaranteed automotive qualification.
Availability
BZX384-A30-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, LED driver feedback networks, and consumer power supply references requiring stable component supply with AEC-Q101 compliance and ±1 % voltage accuracy.
Supply support for BZX384-A30-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 diode product line, engineered specifically for precision voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum continuous forward current for BZX384-A30-Q?
The BZX384-A30-Q is a Zener diode intended for reverse-bias operation; its forward conduction is not a design parameter. The datasheet specifies a maximum forward current of 250 mA under absolute limiting conditions, but this value applies only to short-duration pulses and does not represent a continuous operational rating. In normal regulation use, forward current is negligible.
Can BZX384-A30-Q be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients and manufacturing variations that cause current hogging when paralleled. Even matched units will not share current equally due to differential resistance mismatch and thermal runaway risk. For higher power, select a single diode with appropriate rating or use active regulation instead.
Is the 30 V Zener voltage measured at 2 mA or 5 mA test current?
The BZX384-A30-Q specifies its 29.7–30.3 V Zener voltage at IZ = 2 mA, consistent with the A-series tolerance band definition in Table 9 of the datasheet. This differs from older Zener families that use 5 mA; using 2 mA ensures tighter tolerance validation and matches automotive test standards.
Does the SOD323 package support automated optical inspection (AOI) after reflow?
Yes - the SOD323 package features a visible cathode marking bar and consistent solder joint geometry compatible with standard AOI systems. Nexperia provides recommended stencil aperture dimensions (0.5 mm × 0.6 mm, 2×) and solder paste volume in Figure 12, enabling reliable defect detection for voiding, bridging, and tombstoning.
BZX384-A30-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):
- 30 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A30-QX FAQ
1.How can I place an order for BZX384-A30-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A30-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-A30-QX reliable?
The price and inventory of BZX384-A30-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-A30-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A30-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A30-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A30-QX?
BZX384-A30-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A30-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-A30-QX?
For technical support, including BZX384-A30-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A30-QX requirements.
6.How does Aetrix verify that BZX384-A30-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A30-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-A30-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A30-QX?
All BZX384-A30-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A30-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-A30-QX part is unused and in its original packaging.
Return procedure for BZX384-A30-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A30-QX Tags
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