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Nexperia USA Inc. BZX384-A16X
- Part No.:
- BZX384-A16X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A16X.pdf
- Description:
- DIODE ZENER 16V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,957
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Product details
Overview
BZX384-A16X from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 16 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 150 °C maximum junction temperature. 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-A16X datasheet, BZX384-A16X pinout, BZX384-A16X application, or BZX384-A16X equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world use cases, and validated alternative parts with documented functional differences.
Technical Context
This discrete Zener diode operates in reverse-biased breakdown mode to maintain stable DC voltage across its terminals under varying load or input conditions. Its differential resistance of ≤200 Ω at IZ = 5 mA ensures tight regulation, while the −0.05 mV/K temperature coefficient minimizes drift over ambient temperature ranges from −65 °C to +150 °C.
Designed for surface-mount assembly on FR4 PCBs with standard tin-plated copper, it supports non-repetitive surge handling up to 40 W for 100 μs pulses and exhibits 75 pF capacitance at 0 V reverse bias - enabling use in low-frequency stabilization without signal coupling concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 15.84 V to 16.16 V at IZ = 5 mA - guarantees ±1 % tolerance for precision reference design |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - defines continuous DC power limit on standard FR4 PCB |
| Differential Resistance (rdif) | ≤200 Ω at IZ = 5 mA - determines output impedance and regulation sensitivity to current changes |
| Reverse Current (IR) | ≤0.05 μA at VR = 12.8 V - ensures minimal leakage below knee voltage in standby operation |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - enables transient overvoltage clamping without device failure |
| Junction-to-Ambient Rth(j-a) | 415 K/W - quantifies thermal rise per watt in free-air mounting, critical for derating calculations |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; compact 1.35 mm × 0.85 mm footprint and 0.45 mm profile optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to higher-potential node in reverse-bias configuration; marked by bar on package body |
| 2 | Anode (A) | Connected to lower-potential node (typically ground or return path); completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % voltage tolerance | Enables direct replacement in circuits requiring tight reference accuracy without trimming resistors |
| Low differential resistance (≤200 Ω) | Reduces output voltage variation under ±1 mA load current shifts - critical for analog sensing rails |
| 150 °C max junction temperature | Supports reliable operation in thermally constrained industrial enclosures and automotive under-hood proximity |
| 40 W non-repetitive surge rating | Provides single-event ESD/inductive kick immunity without external TVS devices in cost-sensitive designs |
| 75 pF junction capacitance | Limits high-frequency noise coupling in DC reference paths - suitable for ADC reference buffers and op-amp bias networks |
Applications
| Power Supply Feedback Regulation | Sensor Bias Voltage Reference |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck converter feedback loops using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Zener diode provides precise 16 V reference to TL431 shunt regulator or comparator input. Use Value: ±1 % VZ tolerance eliminates need for post-production calibration and maintains <±1.5 % output regulation over line/load/temperature. |
Use Scenario: Supplying stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in data acquisition modules. IC Role / Device Role / Timing Role: Acts as low-noise, low-drift voltage source replacing larger TO-92 Zeners or IC references where space is limited. Use Value: 200 Ω rdif and −0.05 mV/K TC ensure <50 ppm/°C reference stability - meeting Class A industrial sensor accuracy requirements. |
| Overvoltage Clamp Protection | Microcontroller I/O Pin Protection |
Use Scenario: Clamping induced transients on 15 V rail powering analog front-end circuitry in motor control inverters. IC Role / Device Role / Timing Role: Shunts excess energy during MOSFET switching spikes before reaching downstream op-amps or ADC inputs. Use Value: 40 W PZSM rating absorbs 100 μs surges up to 16.5 V without degradation - extending system MTBF vs. generic 1N4744A. |
Use Scenario: Protecting 3.3 V or 5 V GPIO pins against accidental 12–16 V miswiring or back-EMF coupling in industrial HMI panels. IC Role / Device Role / Timing Role: Placed anode-to-ground, cathode-to-pin to clamp reverse faults and forward overvoltage events. Use Value: Low 0.05 μA IR at 12.8 V prevents signal loading; SOD323 size allows placement within 2 mm of connector entry point. |
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 | 16 V nominal, ±5 % tolerance, 200 mW Ptot, 300 Ω rdif | Higher tolerance and lower power limit reduce accuracy and surge margin in precision feedback paths | Select when cost is primary and ±5 % regulation suffices; avoid in closed-loop control systems |
| Vishay BZX384-C16 | 16 V nominal, ±5 % tolerance, same SOD323 package and 300 mW rating | Looser tolerance increases risk of out-of-spec output in tightly regulated supplies | Acceptable for non-critical biasing where board-level calibration compensates for VZ variance |
Compared with BZX384-A16X, MMBZ5245BS trades regulation precision for lower unit cost, while BZX384-C16 retains identical thermal and surge capability but sacrifices 4× tighter voltage control - making the A-grade part essential for uncalibrated analog subsystems.
Availability
BZX384-A16X is available at Aetrix Electronics and suitable for power supply feedback regulation, sensor bias voltage reference, and overvoltage clamp protection requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for BZX384-A16X 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for space-constrained, low-power voltage reference and protection applications where stability, repeatability, and SMD manufacturability are mandatory.
FAQ
What is the maximum continuous reverse current the BZX384-A16X can sustain at 25 °C ambient?
The BZX384-A16X does not specify a maximum continuous reverse current; instead, its safe operating area is defined by power dissipation limits. At 25 °C ambient on a standard FR4 PCB, it sustains up to 18.75 mA continuously (300 mW ÷ 16 V), assuming ideal thermal conditions and no derating. Actual usable current must be reduced per Rth(j-a) = 415 K/W when ambient exceeds 25 °C.
Can the BZX384-A16X replace a 1N4744A in existing designs?
No - the 1N4744A is a 14 V, 1 W through-hole Zener with TO-204AA package and ±5 % tolerance, whereas BZX384-A16X is a 16 V, 300 mW SOD323 device with ±1 % tolerance. Direct substitution requires verifying voltage match, power derating for SMT thermal limits, and layout adaptation for 2-pin SMD placement and soldering.
How does the temperature coefficient affect regulation accuracy over −40 °C to +85 °C?
With a specified temperature coefficient of −0.05 mV/K, the BZX384-A16X exhibits approximately ±0.63 V drift over a 125 K range (−40 °C to +85 °C), translating to ±3.9 % deviation from nominal 16 V. This is acceptable for non-precision biasing but insufficient for metrology-grade references without compensation.
Is the marking code '36' on the BZX384-A16X body confirmed per official documentation?
Yes - Table 4 of the Nexperia datasheet explicitly lists '36' as the marking code for BZX384-A16, confirming laser-marked identification on the SOD323 package cathode side. This matches industry-standard traceability practices and enables automated optical inspection during assembly.
BZX384-A16X 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):
- 16 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11.2 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-A16X FAQ
1.How can I place an order for BZX384-A16X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A16X 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-A16X reliable?
The price and inventory of BZX384-A16X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A16X is usually 5 days.
3.What payment methods are accepted for BZX384-A16X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A16X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A16X?
BZX384-A16X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A16X 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-A16X?
For technical support, including BZX384-A16X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A16X requirements.
6.How does Aetrix verify that BZX384-A16X is sourced from the original manufacturer or authorized distributors?
All BZX384-A16X 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-A16X meets industry standards.
7.What is the process for return or replacement of BZX384-A16X?
All BZX384-A16X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A16X, 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-A16X part is unused and in its original packaging.
Return procedure for BZX384-A16X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A16X Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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