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Nexperia USA Inc. BZX384-B15,115
- Part No.:
- BZX384-B15,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B15,115.pdf
- Description:
- DIODE ZENER 15V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:913
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Product details
Overview
BZX384-B15,115 from Nexperia is a ±2 % 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 40 W non-repetitive peak reverse power. It serves as a precision reference or low-power voltage clamp in power supply feedback paths, sensor biasing, and overvoltage protection circuits.
For engineers reviewing the BZX384-B15,115 datasheet, BZX384-B15,115 pinout, BZX384-B15,115 application, or BZX384-B15,115 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world use cases, and validated alternative parts with documented tolerance and temperature coefficient differences.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a specified 15 V nominal working voltage at IZ = 5 mA, exhibiting a typical differential resistance of 200 Ω and temperature coefficient of +9.2 mV/K. Its junction-to-ambient thermal resistance is 415 K/W on FR4 PCB, limiting continuous dissipation to 300 mW at Tamb ≤ 25 °C.
The device supports transient surge handling up to 40 W for 100 μs pulses at Tj = 25 °C, with reverse current limited to 0.05 μA at VR = 12 V and 30 μA at VR = 14.25 V. Cathode marking is indicated by a bar on the SOD323 body per IEC 60747-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 14.7 V to 15.3 V at IZ = 5 mA - defines regulation window for stable 15 V reference under nominal bias |
| Power Dissipation | 300 mW max at Tamb ≤ 25 °C - sets maximum continuous DC load in linear regulation applications |
| Differential Resistance | 200 Ω max at IZ = 5 mA - determines output impedance and load regulation error sensitivity |
| Reverse Current | 0.05 μA max at VR = 12 V - ensures minimal leakage in high-impedance bias networks |
| Temperature Coefficient | +9.2 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius in temperature-sensitive references |
| Peak Pulse Power | 40 W for tp = 100 μs - enables transient overvoltage clamping without failure |
| Junction Temperature | 150 °C max - constrains thermal design margin when mounted on standard FR4 PCB |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2-terminal, 1.35 mm × 0.85 mm body, 0.45 mm pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode connection point for Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % voltage tolerance | Enables tighter regulation than ±5 % variants (BZX384-C), reducing calibration overhead in precision analog circuits |
| 300 mW total power rating | Supports direct replacement of legacy 400 mW through-hole Zeners in space-constrained SMT designs without derating |
| 415 K/W junction-to-ambient Rth | Defines thermal rise of 124.5 °C at full 300 mW dissipation - requires layout-aware copper pour for sustained operation |
| 100 μs/40 W surge capability | Clamps ESD transients (IEC 61000-4-2 Level 4) without degradation when used with series current-limiting resistor |
| Marking code "M2" | Uniquely identifies BZX384-B15 variant on device body for automated optical inspection and traceability |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
|
Use Scenario: Stabilizing output voltage in adjustable buck converter feedback loop using TL431-like topology. IC Role / Device Role / Timing Role: Provides precise 15 V reference to comparator input, enabling accurate output setpoint control. Use Value: ±2 % tolerance ensures <±1.5 % output voltage error before compensation, reducing need for post-production trimming. |
Use Scenario: Supplying stable bias to bridge-based pressure sensor in industrial IoT node. IC Role / Device Role / Timing Role: Acts as shunt reference for excitation voltage, rejecting supply ripple and noise. Use Value: Low 0.05 μA leakage at 12 V ensures minimal error injection into high-impedance Wheatstone bridge arms. |
| Overvoltage Clamp Protection | Microcontroller I/O Pin Protection |
|
Use Scenario: Protecting 12 V automotive subsystem input against load-dump surges up to 30 V. IC Role / Device Role / Timing Role: Shunt-clamps transient energy above 15.3 V threshold into series current-limiting resistor. Use Value: 40 W pulse rating absorbs 4 mJ surge (40 W × 100 μs), preventing downstream IC damage without TVS diode cost premium. |
Use Scenario: Safeguarding 3.3 V GPIO pin against accidental 12 V misconnection in field-serviceable equipment. IC Role / Device Role / Timing Role: Conducts excess voltage to ground once reverse breakdown exceeds 15 V, limiting pin stress. Use Value: 200 Ω differential resistance limits clamp current to <75 mA at 15 V, staying within safe SOA for most MCU pins. |
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-A15,115 | ±1 % tolerance (14.85–15.15 V), higher cost, same package and thermal specs | Better suited for metrology-grade references where <±0.2 V error is critical | Select when absolute voltage accuracy outweighs cost sensitivity and board space is fixed |
| BZX384-C15,115 | ±5 % tolerance (13.8–15.6 V), lower cost, identical footprint and surge rating | Acceptable for non-critical biasing where 1.8 V regulation window is tolerable | Choose for cost-driven consumer electronics where calibration is performed digitally post-assembly |
Compared with BZX384-B15,115, the A15 offers tighter regulation at higher unit cost, while the C15 trades accuracy for economy-both retain identical thermal performance and surge resilience, making them drop-in replacements only when tolerance requirements align with system-level error budgets.
Availability
BZX384-B15,115 is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing networks, overvoltage clamp protection, and microcontroller I/O pin protection requiring stable component supply across industrial, instrumentation, and embedded control programs.
Supply support for BZX384-B15,115 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 and industrial-grade components.
The BZX384 series belongs to Nexperia's precision Zener regulator product line, engineered for stable voltage reference and clamping in compact SMT applications where size, consistency, and surge robustness are prioritized over ultra-low leakage or ultra-tight tolerance.
FAQ
What is the maximum continuous forward current for BZX384-B15,115?
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 degrades regulation stability and is not recommended in design. Forward voltage is 0.9 V at 10 mA pulse test conditions.
Can BZX384-B15,115 replace a 1N4744A in existing designs?
Yes, with caveats: both are 15 V Zeners, but BZX384-B15,115 has ±2 % tolerance (vs. 1N4744A's ±5 %), 300 mW power rating (vs. 1W), and SOD323 footprint (vs. DO-41). Requires PCB redesign and power derating; suitable only where 300 mW suffices and tighter tolerance is beneficial.
How does temperature affect the 15 V regulation voltage?
At IZ = 5 mA, the temperature coefficient is +9.2 mV/K - meaning regulation voltage increases by ~9.2 mV per °C rise in junction temperature. Over –65 °C to +150 °C ambient range, this yields ~2.0 V total drift, requiring thermal management or compensation in high-stability applications.
Is BZX384-B15,115 automotive-qualified?
No. Per Revision 4 datasheet Section 13, this part is non-automotive qualified. Nexperia explicitly states that BZX384-B15,115 is not tested or warranted for automotive use; automotive alternatives are designated with "-Q" suffix and require separate qualification documentation.
BZX384-B15,115 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:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B15,115 FAQ
1.How can I place an order for BZX384-B15,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B15,115 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-B15,115 reliable?
The price and inventory of BZX384-B15,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B15,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B15,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B15,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B15,115?
BZX384-B15,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B15,115 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-B15,115?
For technical support, including BZX384-B15,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B15,115 requirements.
6.How does Aetrix verify that BZX384-B15,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B15,115 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-B15,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B15,115?
All BZX384-B15,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B15,115, 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-B15,115 part is unused and in its original packaging.
Return procedure for BZX384-B15,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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