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Nexperia USA Inc. BZX384-A16-QX
- Part No.:
- BZX384-A16-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A16-QX.pdf
- Description:
- DIODE ZENER 16V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,476
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Product details
Overview
BZX384-A16-QX 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 qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-A16-QX datasheet, BZX384-A16-QX pinout, BZX384-A16-QX application, or BZX384-A16-QX equivalent, this device serves as a precision low-power shunt regulator in ECU power rails, sensor biasing networks, and ADC reference stabilization where tight voltage tolerance and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its ±1 % tolerance ensures minimal deviation from the 16 V nominal Zener voltage at IZ = 5 mA, with differential resistance of 200 Ω max and temperature coefficient of +11.2 mV/K.
Designed for surface-mount use on FR4 PCBs, it supports non-repetitive peak reverse power dissipation up to 40 W (100 μs pulse), junction temperature up to 150 °C, and ambient operating range from −65 °C to +150 °C - meeting automotive environmental stress requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.84 V to 16.16 V at IZ = 5 mA - defines precise regulation point for feedback or clamping |
| Tolerance | ±1 % - enables high-accuracy voltage references without external trimming |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - limits continuous thermal load on standard SMD layout |
| Differential Resistance (rdif) | ≤200 Ω - determines output impedance and regulation stiffness under load variation |
| Reverse Current (IR) | ≤0.05 μA at VR = 12.8 V - ensures minimal leakage in standby or low-power modes |
| Temperature Coefficient (SZ) | +11.2 mV/K - quantifies voltage drift per degree Celsius rise at nominal current |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - relevant for polarity-check or dual-use forward conduction paths |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; cathode marked by bar on top surface; compact footprint (2.7 mm × 1.6 mm × 1.1 mm) optimized for high-density automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and body-control applications requiring extended temperature and reliability compliance |
| ±1 % voltage tolerance | Reduces need for post-production calibration in precision analog subsystems like sensor signal conditioning |
| 300 mW power rating | Supports stable regulation in low-to-moderate current applications (e.g., microcontroller reset circuits, op-amp references) |
| Non-repetitive 40 W surge capability | Withstands transient overvoltage events such as load dump or ESD-induced spikes without failure |
| SOD323 package | Enables automated placement and reflow compatibility while minimizing board space versus larger DO-35 or SOD123 packages |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Biasing Network |
|---|---|
|
Use Scenario: Protects 16 V nominal supply rail in engine control units against load-dump transients exceeding 40 V. IC Role / Device Role / Timing Role: Shunt regulator clamping element placed between rail and ground to divert surge current above threshold. Use Value: Maintains rail voltage within safe operating range of downstream MCUs and CAN transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Provides stable 16 V bias for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference source for Wheatstone bridge excitation and ratiometric ADC scaling. Use Value: Enables <1 % full-scale error in pressure measurement due to ±1 % Zener tolerance and low tempco. |
| Automotive Lighting Control Reference | Medical Instrument ADC Reference Stabilization |
|
Use Scenario: Supplies regulated voltage to LED driver IC feedback nodes in adaptive headlight modules. IC Role / Device Role / Timing Role: Voltage reference for current-sense amplifier offset compensation and PWM dimming threshold setting. Use Value: Ensures consistent LED brightness across −40 °C to +125 °C ambient via AEC-Q101–qualified thermal stability. |
Use Scenario: Stabilizes reference input for 16-bit SAR ADC in portable patient monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift shunt reference replacing bulkier TL431-based solutions. Use Value: Achieves <0.01 % linearity error contribution with 200 Ω dynamic impedance and <0.05 μA leakage at 80 % VZ. |
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-B16-Q | ±2 % tolerance (15.7 V–16.3 V), higher max differential resistance (250 Ω) | Acceptable where tighter regulation not critical; lower cost in non-automotive consumer designs | Select when AEC-Q101 qualification is unnecessary and ±2 % accuracy suffices for cost-sensitive volume production |
| MMSZ4687T1G | ±5 % tolerance (15.2 V–16.8 V), SOD-123 package, 500 mW Ptot | Higher power handling but looser tolerance; not AEC-Q101 qualified | Choose only for industrial non-automotive use requiring >300 mW continuous dissipation and larger thermal mass |
Compared with BZX384-B16-Q and MMSZ4687T1G, the BZX384-A16-QX uniquely combines automotive qualification, ±1 % precision, and SOD323 miniaturization - making it irreplaceable in space-constrained, safety-critical vehicle subsystems demanding traceable voltage accuracy.
Availability
BZX384-A16-QX is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, medical instrumentation reference circuits, and lighting control modules requiring stable component supply with guaranteed long-term availability.
Supply support for BZX384-A16-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 global semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in harsh-environment electronics where AEC-Q101 compliance and tight parametric control are mandatory.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX384-A16-QX has a maximum continuous forward current of 250 mA, but its Zener operation relies on controlled reverse current. At 16 V regulation, continuous reverse current must be limited to ≤18.75 mA to stay within the 300 mW power dissipation limit (P = V × I). Exceeding this risks thermal runaway without adequate PCB copper area.
Is this diode suitable for bidirectional ESD protection?
No - the BZX384-A16-QX is a unidirectional Zener diode optimized for reverse-bias regulation only. It lacks symmetric clamping characteristics and specified ESD robustness (e.g., IEC 61000-4-2 rating). For bidirectional ESD protection, dedicated TVS diodes like PESD5V0S1BA should be used instead.
How does the temperature coefficient affect regulation accuracy over automotive temperature range?
With a +11.2 mV/K temperature coefficient, the Zener voltage increases by approximately 1.7 V across −40 °C to +125 °C (165 K delta). At 125 °C, VZ reaches ~17.7 V - a +10.6 % shift. System-level compensation (e.g., resistor divider feedback) is required for applications needing <1 % total voltage error across full temperature range.
Can this part replace older BZX384-A16 variants without design changes?
Yes - the BZX384-A16-QX is a direct replacement for legacy BZX384-A16 parts, maintaining identical electrical specifications, SOD323 mechanical outline, and marking code "36". The "-QX" suffix denotes enhanced automotive qualification and updated packaging per Nexperia's 2021 revision, with no functional or layout impact.
BZX384-A16-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):
- 16 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 40 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A16-QX FAQ
1.How can I place an order for BZX384-A16-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A16-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-A16-QX reliable?
The price and inventory of BZX384-A16-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-A16-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A16-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A16-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A16-QX?
BZX384-A16-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A16-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-A16-QX?
For technical support, including BZX384-A16-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A16-QX requirements.
6.How does Aetrix verify that BZX384-A16-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A16-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-A16-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A16-QX?
All BZX384-A16-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A16-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-A16-QX part is unused and in its original packaging.
Return procedure for BZX384-A16-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A16-QX Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
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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
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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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