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NXP Semiconductors BZX384-C15/ZLX
- Part No.:
- BZX384-C15/ZLX
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C15/ZLX.pdf
- Description:
- DIODE ZENER 15V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,566
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Product details
Overview
BZX384-C15/ZLX from Nexperia is a ±5 % 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 200 Ω maximum differential resistance - used for precision low-power voltage reference and overvoltage protection in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX384-C15/ZLX datasheet, BZX384-C15/ZLX pinout, BZX384-C15/ZLX application, or BZX384-C15/ZLX equivalent, this page delivers verified electrical specs, thermal behavior, cathode/anode terminal mapping, real-world use cases, and validated alternative parts for supply continuity and design flexibility.
Technical Context
The BZX384-C15/ZLX operates as a silicon planar Zener diode with avalanche-dominated breakdown at 15 V, exhibiting a temperature coefficient of +9.2 to +13.0 mV/K across 25–150 °C and reverse current ≤0.05 μA at VR = 11.4 V. Its junction-to-ambient thermal resistance is 415 K/W on FR4 PCB, limiting continuous operation to ≤150 °C junction temperature.
Designed for stable DC voltage regulation under low-current conditions (IZ = 5 mA), it supports non-repetitive surge handling up to 2.0 A peak reverse current (tp = 100 μs) and maintains ≤15 V dynamic impedance variation across its operating range - enabling reliable clamping in feedback loops and reference nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 15 V nominal at IZ = 5 mA; ±5 % tolerance (13.8–15.6 V range) |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB - defines max continuous DC bias without derating |
| Differential Resistance | ≤200 Ω at IZ = 5 mA - ensures minimal output voltage shift under load current variation |
| Reverse Current | ≤0.05 μA at VR = 11.4 V - guarantees low leakage in high-impedance reference paths |
| Forward Voltage | 0.9 V at IF = 10 mA - enables predictable forward conduction for bidirectional protection schemes |
| Junction Temperature | 150 °C max - sets absolute thermal limit for reliability-critical applications |
| Non-repetitive Peak Current | 2.0 A (tp = 100 μs) - supports transient overvoltage suppression without failure |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2-terminal, 1.35 mm × 1.75 mm body, 0.45 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for voltage reference |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD323 footprint (1.35 × 1.75 mm) enables high-density PCB layouts in portable electronics |
| Stable voltage reference | ±5 % tolerance with <200 Ω dynamic impedance ensures repeatable 15 V regulation across production lots |
| Low leakage performance | ≤0.05 μA reverse current at 76 % of VZ allows use in battery-powered sensor bias networks |
| Thermal robustness | 150 °C max junction temperature and 415 K/W Rth(j-a) support operation in unventilated enclosures |
| Transient surge capability | 2.0 A non-repetitive peak reverse current handles ESD and line transients per IEC 61000-4-2 Level 4 |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 15 V reference for op-amp feedback networks in DC-DC converter error amplifiers. IC Role / Device Role / Timing Role: Zener diode establishes fixed reference potential against which output voltage is compared. Use Value: Maintains ±0.75 V regulation accuracy across temperature and load, reducing output drift to <1 %. |
Use Scenario: Protecting microcontroller I/O pins from 24 V field bus surges in industrial PLC input modules. IC Role / Device Role / Timing Role: Reverse-biased clamp shunts excess voltage above 15 V to ground before IC damage occurs. Use Value: Limits transient voltage to ≤15.6 V (max VZ) with 2.0 A surge capacity, preventing latch-up in 3.3 V logic. |
| Low-Power Sensor Bias | LED Current Regulation |
Use Scenario: Biasing analog output sensors (e.g., pressure transducers) requiring stable excitation voltage from coin-cell sources. IC Role / Device Role / Timing Role: Provides low-leakage 15 V reference to sensor bridge excitation circuitry. Use Value: Delivers <0.05 μA reverse current at 11.4 V, extending battery life beyond 10 years in always-on monitoring. |
Use Scenario: Setting constant current for high-brightness white LEDs in automotive interior lighting where space is constrained. IC Role / Device Role / Timing Role: Acts as voltage reference in series-pass LED driver topology to fix current via sense resistor. Use Value: Enables ±5 % current accuracy with <200 Ω dynamic impedance, minimizing brightness variation across units. |
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 | ±2 % tolerance (14.7–15.3 V), 150 Ω max rdif, 0.05 μA IR at VR = 11.4 V | Narrower voltage spread improves reference accuracy but increases cost; same SOD323 package | Select when tighter regulation (±2 %) is required for precision feedback or calibration circuits. |
| MMBZ5245BS | ±5 % tolerance (14.25–15.75 V), 150 mW Ptot, 170 Ω max rdif, SOT-323 package | Lower power rating limits continuous current; smaller thermal mass reduces surge handling (1.5 A IZSM) | Choose for ultra-compact layouts where 150 mW dissipation suffices and board area is critical. |
Compared with BZX384-C15/ZLX, BZX384-B15 offers higher accuracy at the expense of tighter process control, while MMBZ5245BS trades thermal robustness and surge margin for reduced footprint - making BZX384-C15/ZLX optimal for cost-sensitive, medium-power regulation with proven field reliability.
Availability
BZX384-C15/ZLX is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and IoT sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX384-C15/ZLX 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX384 series was developed specifically for low-power voltage regulation in space-constrained SMD applications, emphasizing tight tolerances, low leakage, and robust surge immunity across wide temperature ranges.
FAQ
What is the exact breakdown voltage tolerance for BZX384-C15/ZLX?
The BZX384-C15/ZLX has a nominal 15 V Zener voltage with ±5 % tolerance, meaning its actual breakdown voltage falls between 13.8 V and 15.6 V when measured at IZ = 5 mA and Tj = 25 °C. This tolerance band is confirmed in Table 8 of the Nexperia datasheet Rev. 4.
Can BZX384-C15/ZLX be used in place of a 12 V Zener diode?
No - BZX384-C15/ZLX is specified only for 15 V regulation and must not substitute for 12 V Zeners like BZX384-C12. Its minimum breakdown voltage is 13.8 V, exceeding the 12 V nominal by ≥1.8 V, which would cause incorrect biasing or insufficient clamping in 12 V systems.
What is the maximum continuous forward current for BZX384-C15/ZLX?
The absolute maximum forward current for BZX384-C15/ZLX is 250 mA, as defined in Table 5 (Limiting Values). However, sustained operation above 100 mA is discouraged due to thermal limitations - VF reaches 1.1 V at IF = 100 mA, increasing power dissipation beyond safe margins on standard FR4 PCBs.
Does BZX384-C15/ZLX meet automotive qualification standards?
No - BZX384-C15/ZLX is a commercial-grade device and is explicitly stated in the datasheet revision history (Section 13) to be non-automotive qualified. For automotive applications, Nexperia offers separate -Q qualified variants such as BZX384-C15-Q, which undergo AEC-Q101 stress testing.
How does temperature affect the regulation voltage of BZX384-C15/ZLX?
The BZX384-C15/ZLX exhibits a positive temperature coefficient of +9.2 to +13.0 mV/K (Table 8), meaning its Zener voltage increases by approximately 12 mV per °C rise in junction temperature. At 100 °C, VZ rises ~900 mV above its 25 °C value - a critical factor in high-temperature power supply designs.
BZX384-C15/ZLX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 700 mV
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C15/ZLX FAQ
1.How can I place an order for BZX384-C15/ZLX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C15/ZLX 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-C15/ZLX reliable?
The price and inventory of BZX384-C15/ZLX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C15/ZLX is usually 5 days.
3.What payment methods are accepted for BZX384-C15/ZLX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C15/ZLX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C15/ZLX?
BZX384-C15/ZLX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C15/ZLX 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-C15/ZLX?
For technical support, including BZX384-C15/ZLX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C15/ZLX requirements.
6.How does Aetrix verify that BZX384-C15/ZLX is sourced from the original manufacturer or authorized distributors?
All BZX384-C15/ZLX 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-C15/ZLX meets industry standards.
7.What is the process for return or replacement of BZX384-C15/ZLX?
All BZX384-C15/ZLX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C15/ZLX, 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-C15/ZLX part is unused and in its original packaging.
Return procedure for BZX384-C15/ZLX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C15/ZLX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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