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Nexperia USA Inc. BZX84W-B16-QF
- Part No.:
- BZX84W-B16-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B16-QF.pdf
- Description:
- DIODE ZENER 16V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,604
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Product details
Overview
BZX84W-B16-QF from Nexperia is a ±2% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 16.0 V nominal Zener voltage at 5 mA, 200 mA maximum forward current, and 275 mW total power dissipation. It delivers stable voltage reference in automotive power rail monitoring and ECU biasing circuits.
For engineers reviewing the BZX84W-B16-QF datasheet, BZX84W-B16-QF pinout, BZX84W-B16-QF application, or BZX84W-B16-QF equivalent, this page provides verified Zener voltage, differential resistance, temperature coefficient, thermal resistance, and AEC-Q101 qualification status to support automotive-grade design validation and component selection.
Technical Context
This Zener diode operates in reverse breakdown with a typical differential resistance of 200 Ω at 5 mA and a positive temperature coefficient of +12.4 mV/K, enabling predictable voltage drift over temperature in precision bias networks. Its low 1.5 pF junction capacitance at 0 V supports high-frequency noise suppression up to ~100 MHz.
Qualified per AEC-Q101, it sustains 150 °C junction temperature and −55 °C to +150 °C ambient operation, with non-repetitive peak reverse power dissipation of 40 W for 100 µs pulses-critical for transient overvoltage clamping in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.7–16.3 V at IZ = 5 mA; ensures tight regulation window for 16 V rail supervision |
| Tolerance | ±2 % (B-series); enables accurate voltage threshold setting without post-calibration |
| Differential Resistance | 200 Ω max at IZ = 5 mA; limits output impedance under dynamic load changes |
| Temperature Coefficient | +12.4 mV/K at IZ = 5 mA; defines predictable +1.98 V drift across −40 °C to +125 °C |
| Junction Capacitance | 1.5 pF at f = 1 MHz, VR = 0 V; preserves signal integrity in RF-coupled feedback paths |
| Thermal Resistance | 455 K/W (junction-to-ambient, FR4 PCB); determines 61 °C/W self-heating rise at full 275 mW |
| Reverse Current | 50 nA max at VR = 11.2 V (0.7 × VZnom); guarantees low leakage in standby power domains |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals, 1.3 mm × 1.8 mm footprint, and 0.65 mm pitch; optimized for automated reflow assembly on high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in shunt regulation configuration |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected to avoid parasitic coupling or solder bridging |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated voltage node and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood environments including thermal cycling, humidity, and mechanical shock |
| Low junction capacitance | 1.5 pF enables use in high-frequency decoupling and RF detector circuits without signal attenuation |
| Stable temperature coefficient | +12.4 mV/K allows predictable compensation in temperature-sensitive analog references |
| High surge capability | 40 W non-repetitive peak reverse power (100 µs pulse) protects against ISO 7637-2 transient spikes |
| Compact SOT323 footprint | 1.3 × 1.8 mm area saves board space vs. larger packages like SOD-323 or DO-35 |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Bias Reference |
|---|---|
|
Use Scenario: Monitoring 12 V battery rail in engine control units during cold cranking and load dump events. IC Role / Device Role / Timing Role: Shunt Zener regulator providing stable 16 V reference for comparator input and microcontroller reset circuitry. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure reliable reset assertion across −40 °C to +125 °C ambient and 40 V transients. |
Use Scenario: Supplying precise bias voltage to bridge-based pressure sensors in factory automation modules. IC Role / Device Role / Timing Role: Low-noise voltage reference source for Wheatstone bridge excitation and ADC reference scaling. Use Value: 1.5 pF capacitance and 200 Ω dynamic impedance minimize sensor signal distortion and improve measurement repeatability. |
| USB-C PD Port Protection | Telecom Line Interface Clamping |
|
Use Scenario: Overvoltage clamping on USB-C CC line during hot-plug events and adapter mismatch conditions. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing 100 µs surges up to 40 W without degradation. Use Value: 455 K/W thermal resistance and 150 °C Tj rating prevent thermal runaway during repeated 20 V transients. |
Use Scenario: Protecting RS-485 transceivers from lightning-induced surges on outdoor telecom lines. IC Role / Device Role / Timing Role: Primary shunt protection element placed before TVS diode array to share energy burden. Use Value: 50 nA leakage at 11.2 V preserves high-impedance receiver input integrity during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5245BS | Same 16 V nominal, ±5 % tolerance, SOT-323 package, but higher 300 Ω rdif and no AEC-Q101 qualification | Acceptable for industrial/commercial designs where automotive reliability is not required | Select when cost sensitivity outweighs AEC-Q101 compliance and tighter tolerance needs |
| Vishay BZX84-C16 | 16 V nominal, ±5 % tolerance, same SOT-323 package, 250 Ω rdif, qualified to AEC-Q101 Grade 2 (−40 °C to +105 °C) | Limited to under-hood applications with lower ambient temperature ceilings | Choose only if system ambient stays below +105 °C and ±5 % tolerance is acceptable |
Compared with BZX84W-B16-QF, MMBZ5245BS trades AEC-Q101 compliance and ±2 % tolerance for lower cost, while BZX84-C16 sacrifices full automotive temperature range and tighter regulation for broader distributor availability.
Availability
BZX84W-B16-QF is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom line protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84W-B16-QF 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 core strengths in automotive, industrial, and mobile applications.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh automotive environments.
FAQ
What is the maximum continuous power dissipation for BZX84W-B16-QF?
The BZX84W-B16-QF has a total power dissipation limit of 275 mW at Tamb = 25 °C on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 1.2 mW/°C, reaching zero dissipation at 150 °C ambient due to its 455 K/W thermal resistance.
Is BZX84W-B16-QF suitable for use in reverse-biased avalanche mode only?
Yes-BZX84W-B16-QF is designed exclusively for reverse-bias Zener breakdown operation. Its anode (Pin 1) and cathode (Pin 3) must be connected such that reverse voltage exceeds 15.7 V to enter regulation; forward conduction is limited to ≤0.9 V at 10 mA and is not intended for sustained use.
How does the ±2 % tolerance affect voltage accuracy across temperature?
The ±2 % initial tolerance applies at 25 °C and 5 mA. Combined with its +12.4 mV/K temperature coefficient, the worst-case deviation over −40 °C to +125 °C is ±2 % plus ±2.06 V (165 K × 12.4 mV/K), yielding a total band of 13.64 V to 18.36 V under full thermal stress.
Can Pin 2 (n.c.) be left floating or must it be grounded?
Pin 2 is internally not connected and must remain unconnected-neither grounded nor tied to any net. PCB layout must ensure no solder mask opening or copper pour bridges to this pad, as contact could induce leakage paths or parasitic capacitance degrading high-frequency performance.
BZX84W-B16-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±1.88%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B16-QF FAQ
1.How can I place an order for BZX84W-B16-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B16-QF 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 BZX84W-B16-QF reliable?
The price and inventory of BZX84W-B16-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B16-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-B16-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B16-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B16-QF?
BZX84W-B16-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B16-QF 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 BZX84W-B16-QF?
For technical support, including BZX84W-B16-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B16-QF requirements.
6.How does Aetrix verify that BZX84W-B16-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-B16-QF 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 BZX84W-B16-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-B16-QF?
All BZX84W-B16-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B16-QF, 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 BZX84W-B16-QF part is unused and in its original packaging.
Return procedure for BZX84W-B16-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B16-QF Tags
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MM5Z5V1ST1G
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