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Nexperia USA Inc. BZX384-B15-QX
- Part No.:
- BZX384-B15-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B15-QX.pdf
- Description:
- DIODE ZENER 15V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,135
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Product details
Overview
BZX384-B15-QX 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 qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-B15-QX datasheet, BZX384-B15-QX pinout, BZX384-B15-QX application, or BZX384-B15-QX equivalent, this page delivers verified Zener parameters, cathode/anode terminal mapping, thermal resistance data, automotive qualification status, and direct alternatives with tolerance and temperature coefficient differences.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable 15 V output across load variations by conducting reverse current above its specified Zener knee voltage. Its differential resistance of ≤200 Ω at IZ = 5 mA ensures low dynamic impedance for precision regulation.
Designed for surface-mount automotive systems, it features a junction-to-ambient thermal resistance of 415 K/W on FR4 PCB and supports non-repetitive peak reverse power up to 40 W for transient suppression. The temperature coefficient of +9.2 to +13.0 mV/K enables predictable drift behavior in temperature-varying environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 14.7 V to 15.3 V at IZ = 5 mA - defines tight ±2 % regulation window for stable reference generation |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets continuous DC operating limit on standard FR4 PCB |
| Differential Resistance | ≤200 Ω at IZ = 5 mA - determines output voltage variation under load current changes |
| Reverse Current | ≤0.05 μA at VR = 11.4 V - ensures minimal leakage in standby or high-impedance bias networks |
| Temperature Coefficient | +9.2 to +13.0 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Junction Temperature | −65 °C to +150 °C - enables operation in under-hood automotive environments |
| Package | SOD323 (SC-76) - 2-pin surface-mount footprint with 1.35 mm × 0.85 mm body and cathode marking bar |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; cathode identified by molded marking bar on top surface.
| 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 rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ±2 % voltage tolerance | Enables tighter system-level voltage margining than ±5 % variants without premium ±1 % cost |
| Low thermal resistance | Rth(j-sp) = 110 K/W to solder point - improves power handling during short-duration surges |
| Non-repetitive surge rating | 40 W peak reverse power (100 μs pulse) - supports transient voltage clamping in CAN/LIN bus protection |
| Small footprint | 1.35 mm × 0.85 mm SOD323 outline - saves board space in dense automotive ECUs and ADAS modules |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 15 V reference for microcontroller ADC and analog front-end in door module electronics. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for precision analog sensing and PWM driver ICs. Use Value: Maintains <±10 mV output stability over −40 °C to +125 °C ambient, enabling consistent sensor calibration across vehicle lifetime. |
Use Scenario: Biasing op-amp input stages and setting threshold voltages in 4–20 mA transmitter circuits. IC Role / Device Role / Timing Role: Precision voltage clamp establishing known reference point for current-loop signal integrity. Use Value: Low 200 Ω dynamic impedance minimizes error contribution to 16-bit DAC output accuracy in process control transmitters. |
| Automotive Infotainment Power Sequencing | Consumer Appliance Overvoltage Protection |
Use Scenario: Enabling controlled power-up sequencing of display backlight drivers and audio amplifiers via voltage-dependent enable logic. IC Role / Device Role / Timing Role: Zener-based voltage detector triggering reset or enable signals when main 12 V rail reaches 15 V threshold. Use Value: Tight ±2 % tolerance ensures repeatable turn-on timing across production units, eliminating batch-dependent sequencing delays. |
Use Scenario: Clamping induced transients on AC-DC converter feedback paths in smart home appliances. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting feedback node excursion during line surges or ESD events. Use Value: 40 W non-repetitive surge rating absorbs 1 kV/500 A IEC 61000-4-5 ring wave energy without degradation. |
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-B15-Q | Same electrical specs and SOD323 package; differs only in marking code (M2 vs blank), indicating identical device with alternate reel labeling | No functional difference; both qualified to AEC-Q101 and share identical Zener characteristics | Select BZX384-B15-QX when traceability to specific production lot or packaging format is required |
| MMSZ5245B-TP | ±5 % tolerance (14.25–15.75 V), higher 500 mW Ptot, Rth(j-a) = 350 K/W, no AEC-Q101 qualification | Suitable for industrial/commercial designs where automotive qualification is not mandated and wider voltage tolerance is acceptable | Choose MMSZ5245B-TP only for cost-sensitive non-automotive applications requiring higher continuous power |
Compared with BZX384-B15-QX, BZX384-B15-Q offers identical performance with alternate marking, while MMSZ5245B-TP trades AEC-Q101 compliance and tight tolerance for higher power and lower cost-making it unsuitable for automotive use but viable for commercial power supplies.
Availability
BZX384-B15-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, infotainment power sequencing, and consumer appliance overvoltage protection requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX384-B15-QX 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 leading global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for automotive, industrial, and mobile applications.
The BZX384-Q series targets automotive voltage regulation with AEC-Q101 qualification, tight tolerances, and robust surge capability-designed specifically for ECU reference, biasing, and transient protection in harsh environments.
FAQ
What is the maximum continuous reverse current for BZX384-B15-QX at 25 °C ambient?
The device supports a maximum continuous forward current of 250 mA, but as a Zener diode operated in reverse breakdown, its steady-state reverse current is determined by external circuitry. At 15 V regulation with 300 mW dissipation limit, the practical maximum DC reverse current is 20 mA - calculated as Ptot/VZ = 0.3 W / 15 V - assuming no additional thermal derating.
How does the cathode marking appear on the SOD323 package?
The cathode is marked by a visible molded bar on the top surface of the SOD323 package, aligned with pin 1. This bar corresponds to the cathode symbol (K) in the simplified outline diagram and must be oriented toward the regulated output node during PCB layout to ensure correct reverse-bias polarity.
Is BZX384-B15-QX suitable for use in a 24 V automotive system's 15 V auxiliary rail?
Yes - its 15 V nominal Zener voltage, ±2 % tolerance, and AEC-Q101 qualification make it appropriate for deriving a stable 15 V rail from a 24 V source using a series resistor. The 150 °C maximum junction temperature and 415 K/W thermal resistance allow safe operation when properly heatsinked on FR4 with adequate copper area.
What is the typical reverse leakage current at 11.4 V reverse bias?
At VR = 11.4 V (76 % of nominal VZ) and Tj = 25 °C, the reverse leakage current is guaranteed ≤0.05 μA. This ultra-low leakage preserves high-impedance node integrity in precision bias networks and minimizes quiescent current in always-on automotive subsystems.
BZX384-B15-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):
- 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B15-QX FAQ
1.How can I place an order for BZX384-B15-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B15-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-B15-QX reliable?
The price and inventory of BZX384-B15-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-B15-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B15-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B15-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B15-QX?
BZX384-B15-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B15-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-B15-QX?
For technical support, including BZX384-B15-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B15-QX requirements.
6.How does Aetrix verify that BZX384-B15-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-B15-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-B15-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B15-QX?
All BZX384-B15-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B15-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-B15-QX part is unused and in its original packaging.
Return procedure for BZX384-B15-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B15-QX Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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