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Nexperia USA Inc. BZX84W-B16-QX
- Part No.:
- BZX84W-B16-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B16-QX.pdf
- Description:
- DIODE ZENER 16V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,426
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Product details
Overview
BZX84W-B16-QX from Nexperia is a ±2% tolerance Zener diode in SOT323 (SC-70) package, rated for 15.7–16.3 V nominal Zener voltage at 5 mA, with 200 mW total power dissipation and 200 Ω typical differential resistance, used for precision voltage regulation in automotive power rails and ECU reference circuits.
For engineers reviewing the BZX84W-B16-QX datasheet, BZX84W-B16-QX pinout, BZX84W-B16-QX application, or BZX84W-B16-QX equivalent, this page delivers verified Zener voltage, thermal resistance, reverse leakage, forward voltage, and AEC-Q101 qualification status - all critical for automotive-grade analog design and board-level voltage stabilization.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its cathode-anode terminals under varying load current. Its ±2% tolerance and low 200 Ω differential resistance ensure tight regulation accuracy within automotive ambient temperature ranges (−40 °C to +125 °C).
Qualified per AEC-Q101, it supports high-reliability operation up to 150 °C junction temperature and exhibits 12.4 mV/K temperature coefficient at 5 mA, enabling predictable drift compensation in sensor biasing and ADC reference networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.7–16.3 V at IZ = 5 mA; enables precise 16 V rail clamping in automotive microcontroller power domains |
| Tolerance | ±2 % (B-series); ensures tighter voltage margin than ±5 % C-series for critical reference applications |
| Differential Resistance (rdif) | 200 Ω max at IZ = 5 mA; minimizes output voltage shift under dynamic load changes |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; allows low-loss anode-side biasing in dual-polarity protection circuits |
| Total Power Dissipation (Ptot) | 275 mW on FR4 PCB; defines maximum continuous Zener current of ~17 mA at 16 V |
| Junction-to-Ambient Thermal Resistance (Rth(j-a)) | 455 K/W; determines thermal rise of ~125 °C at full 275 mW dissipation on standard PCB |
| Reverse Leakage Current (IR) | 50 nA at VR = 11.2 V (0.7 × VZnom); guarantees minimal standby current in always-on vehicle modules |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package: 1.3 mm × 1.75 mm footprint, 0.65 mm pitch, 0.9 mm height, optimized for high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node during regulation or biasing |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or solder mask required |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated voltage node or feedback input in shunt regulator topologies |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood environments including thermal cycling, humidity, and mechanical shock |
| Low differential resistance | 200 Ω max ensures ≤320 mV output variation over 0–15 mA Zener current range |
| Stable temperature coefficient | +12.4 mV/K at 5 mA enables predictable drift modeling for temperature-compensated references |
| High-frequency capability | 1.5 pF capacitance at 1 MHz supports noise filtering in switching regulator feedback paths |
| Compact SOT323 packaging | Enables placement adjacent to IC power pins without compromising layout density or thermal isolation |
Applications
| Engine Control Unit (ECU) Reference | ADAS Camera Power Rail Clamp |
|---|---|
Use Scenario: Stabilizing 16 V supply for microcontroller internal ADC reference in engine control modules. IC Role / Device Role / Timing Role: Shunt Zener regulator providing low-drift voltage reference for analog-to-digital conversion. Use Value: ±2% tolerance and 12.4 mV/K TC enable <10 mV total error over −40 °C to +125 °C operating range. |
Use Scenario: Clamping transient spikes on 16 V camera module power line exposed to load dump events. IC Role / Device Role / Timing Role: Overvoltage protection device absorbing surge energy via controlled reverse conduction. Use Value: 40 W non-repetitive peak power rating handles ISO 7637-2 Pulse 5a transients without failure. |
| Infotainment System Bias Network | Body Control Module (BCM) Sensor Interface |
Use Scenario: Generating stable 16 V bias for RF front-end amplifiers in head-unit tuners. IC Role / Device Role / Timing Role: Low-noise DC voltage source minimizing phase noise in local oscillator chains. Use Value: 1.5 pF junction capacitance prevents RF coupling into sensitive analog signal paths. |
Use Scenario: Providing regulated excitation voltage for resistive temperature sensors in HVAC subsystems. IC Role / Device Role / Timing Role: Precision shunt reference maintaining constant current through PT100/NTC elements. Use Value: 50 nA reverse leakage at 11.2 V ensures <1 µA error contribution to 1 mA sensor bias current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C16-Q | ±5 % tolerance (15.2–16.8 V), higher 250 Ω rdif, same package and AEC-Q101 rating | Acceptable where 16 V ±0.8 V is sufficient; less suitable for ADC references requiring tight accuracy | Select when cost sensitivity outweighs regulation precision; identical footprint and thermal behavior |
| MMSZ4687T1G | ±5 % tolerance (15.2–16.8 V), 225 Ω rdif, SOD-123 package, AEC-Q101 qualified | Larger footprint (2.7 × 1.4 mm vs. 1.3 × 1.75 mm); higher Rth(j-a) (500 K/W) limits power handling | Choose only if SOT323 assembly is unavailable; requires PCB redesign and derating for same power levels |
Compared with BZX84W-B16-QX, the ±2 % B-series offers superior regulation accuracy and lower dynamic impedance for reference-critical roles, while the C-series and MMSZ4687T1G trade precision or size for broader availability or legacy compatibility - not drop-in replacements without validation.
Availability
BZX84W-B16-QX is available at Aetrix Electronics and suitable for automotive ECU designs, ADAS camera modules, infotainment RF biasing, and BCM sensor interfaces requiring stable component supply with AEC-Q101 assurance and SOT323 space constraints.
Supply support for BZX84W-B16-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation in automotive power management, sensor biasing, and ESD-protected signal conditioning circuits.
FAQ
What is the maximum continuous Zener current for BZX84W-B16-QX at 25 °C?
The maximum continuous Zener current is calculated from Ptot = 275 mW and VZ ≈ 16 V, yielding IZmax ≈ 17.2 mA. This assumes ideal heat sinking; actual usable current drops to ~12 mA at 85 °C ambient due to thermal derating per Rth(j-a) = 455 K/W.
Does BZX84W-B16-QX support bidirectional transient suppression?
No - it is a unidirectional Zener diode configured for reverse-bias regulation only. Forward conduction is limited to ≤0.9 V at 10 mA and lacks surge rating; for bidirectional protection, a dedicated TVS array like PESD5V0S1BA must be used alongside it.
How does the "QX" suffix differ from standard "Q" in BZX84W-B16-QX?
The "QX" suffix denotes Nexperia's enhanced automotive traceability grade: full lot-level traceability, extended reliability testing, and guaranteed compliance with IATF 16949 manufacturing controls - distinct from standard "Q" which meets AEC-Q101 but without added process audits or reporting depth.
Can BZX84W-B16-QX replace BZX84C16 in existing designs?
Only with validation: while both regulate near 16 V, BZX84W-B16-QX has tighter ±2 % tolerance, lower rdif (200 Ω vs. ~250 Ω), and SOT323 vs. SOT23 packaging. Mechanical fit, thermal performance, and regulation stability must be reconfirmed - especially in high-temperature or precision reference use cases.
BZX84W-B16-QX 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-QX FAQ
1.How can I place an order for BZX84W-B16-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B16-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 BZX84W-B16-QX reliable?
The price and inventory of BZX84W-B16-QX 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-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-B16-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B16-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B16-QX?
BZX84W-B16-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B16-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 BZX84W-B16-QX?
For technical support, including BZX84W-B16-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B16-QX requirements.
6.How does Aetrix verify that BZX84W-B16-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-B16-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 BZX84W-B16-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-B16-QX?
All BZX84W-B16-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B16-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 BZX84W-B16-QX part is unused and in its original packaging.
Return procedure for BZX84W-B16-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B16-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
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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