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Nexperia USA Inc. BZX384-A15X
- Part No.:
- BZX384-A15X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A15X.pdf
- Description:
- DIODE ZENER 15V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,424
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Product details
Overview
BZX384-A15X from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 15 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 75 Ω maximum differential resistance. It serves as a precision reference or low-power voltage clamp in power supply feedback paths, sensor biasing circuits, and overvoltage protection stages.
For engineers reviewing the BZX384-A15X datasheet, BZX384-A15X pinout, BZX384-A15X application, or BZX384-A15X equivalent, key selection considerations include its 15 V ±1 % Zener voltage tolerance, 75 Ω dynamic impedance at IZ = 5 mA, thermal resistance of 415 K/W (junction-to-ambient), and non-repetitive peak reverse power capability of 40 W.
Technical Context
This device operates in reverse-bias breakdown mode with a specified Zener voltage of 14.85 V to 15.15 V at 5 mA test current and exhibits a temperature coefficient of +10.5 mV/K. Its low 75 Ω differential resistance ensures stable regulation under small-signal load variations.
The diode features a maximum forward voltage of 0.9 V at 10 mA and supports non-repetitive surge currents up to 2.0 A (100 μs pulse), enabling transient suppression in compact DC rails. Junction temperature is rated to 150 °C with storage ambient range from −65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.85 V to 15.15 V at IZ = 5 mA - defines precise regulation point for feedback or reference use |
| Differential Resistance (rdif) | ≤75 Ω at IZ = 5 mA - low impedance ensures minimal output voltage shift with load current changes |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Reverse Current (IR) | ≤0.05 μA at VR = 12 V - guarantees negligible leakage in high-impedance bias networks |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - enables short-duration transient clamping without thermal runaway |
| Thermal Resistance (Rth(j-a)) | 415 K/W - determines junction temperature rise above ambient under steady-state loading |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines conduction loss when used in forward-biased protection configurations |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic case with 2 leads, 2.3 mm × 1.35 mm footprint, 0.45 mm profile height, and cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker aligns with PCB silkscreen bar |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables tight regulation in precision feedback loops without post-production trimming |
| Low 75 Ω differential resistance | Maintains voltage stability across ±1 mA load current variation in 15 V reference designs |
| 40 W non-repetitive peak power rating | Supports ESD and surge suppression per IEC 61000-4-2 Level 4 without external series limiting |
| SOD323 package compatibility | Enables high-density placement in space-constrained consumer and industrial PCB layouts |
| −65 °C to +150 °C operating range | Validates use in extended-temperature environments including automotive under-hood auxiliary circuits |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck converter feedback paths using optocoupler-coupled TL431 alternatives. IC Role / Device Role / Timing Role: Zener reference element providing fixed 15 V threshold to error amplifier input. Use Value: ±1 % tolerance ensures <±0.15 V output deviation across production units without calibration. |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or bridge-based pressure sensors. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing higher-power regulators in analog front-end bias chains. Use Value: 75 Ω dynamic impedance minimizes sensor signal error caused by current draw variation. |
| Overvoltage Clamp for MCU I/O | ESD Protection for Signal Lines |
Use Scenario: Limiting input voltage to 15 V tolerant GPIO pins in industrial control modules exposed to 24 V field wiring transients. IC Role / Device Role / Timing Role: Shunt regulator clamping excess energy before it reaches sensitive CMOS inputs. Use Value: 40 W peak power rating absorbs 100 μs surges without degradation, meeting IEC 61000-4-4 requirements. |
Use Scenario: Protecting UART, I²C, or analog sensor lines against human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Fast-turn-on Zener absorbing >8 kV contact discharge energy via low-inductance SOD323 layout. Use Value: Sub-1 ns response time and <0.05 μA leakage preserve signal integrity and battery life in always-on nodes. |
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 MMBZ5245BS | 15 V ±5 % tolerance, 200 mW Ptot, 100 Ω rdif at 5 mA | Lower accuracy and power handling; suitable only for non-critical biasing | Select when cost sensitivity outweighs regulation precision and surge robustness |
| Vishay BZX384-C15 | 15 V ±5 % tolerance, same SOD323 package and 300 mW rating | Higher leakage (≤5 μA at VR = 12 V) and wider voltage spread (13.8–15.6 V) | Choose for legacy designs where ±5 % tolerance is acceptable and inventory consolidation is prioritized |
Compared with BZX384-A15X, MMBZ5245BS trades 4× tighter voltage tolerance and 1.5× higher surge power for lower cost, while BZX384-C15 retains identical packaging and power rating but sacrifices regulation accuracy and leakage performance for broader voltage coverage.
Availability
BZX384-A15X is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing networks, overvoltage clamps, and ESD protection circuits requiring stable component supply with guaranteed long-term manufacturability.
Supply support for BZX384-A15X 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 advanced packaging and automotive-qualified components.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and clamping in space-constrained, cost-sensitive industrial and consumer power management systems.
FAQ
What is the maximum continuous reverse current this diode can sustain at 15 V?
The BZX384-A15X is not rated for continuous reverse current at its Zener voltage. At VZ = 15 V, it operates in breakdown with a typical test current of 5 mA. Continuous operation must remain within its 300 mW power limit, yielding a theoretical max IZ of 20 mA (15 V × 20 mA = 300 mW), but derating per ambient temperature and PCB thermal design is required.
Can this diode replace a 1N4744A in an existing design?
No - the 1N4744A is a through-hole DO-41 device rated for 14 V ±5 % and 1 W power, whereas BZX384-A15X is a 15 V ±1 % SOD323 device limited to 300 mW. Direct substitution would cause thermal overload and voltage inaccuracy; redesign of power dissipation path and layout is mandatory.
Does this part meet automotive qualification standards?
No - the BZX384-A15X is explicitly designated as non-automotive qualified per Nexperia's revision history (Rev. 4, January 2023). Automotive applications require the −Q qualified variants (e.g., BZX384-A15-Q), which undergo additional AEC-Q200 stress testing and PPAP documentation.
How does the temperature coefficient affect regulation accuracy over −40 °C to +85 °C?
With a specified SZ of +10.5 mV/K at IZ = 5 mA, the Zener voltage shifts approximately +0.53 V across a 50 K temperature span (−40 °C to +85 °C), resulting in ±1.77 % full-scale drift relative to 15 V nominal. This must be accounted for in high-accuracy reference designs or compensated via circuit topology.
BZX384-A15X 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):
- 15 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 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-A15X FAQ
1.How can I place an order for BZX384-A15X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A15X 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-A15X reliable?
The price and inventory of BZX384-A15X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A15X is usually 5 days.
3.What payment methods are accepted for BZX384-A15X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A15X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A15X?
BZX384-A15X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A15X 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-A15X?
For technical support, including BZX384-A15X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A15X requirements.
6.How does Aetrix verify that BZX384-A15X is sourced from the original manufacturer or authorized distributors?
All BZX384-A15X 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-A15X meets industry standards.
7.What is the process for return or replacement of BZX384-A15X?
All BZX384-A15X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A15X, 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-A15X part is unused and in its original packaging.
Return procedure for BZX384-A15X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A15X Tags
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