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Nexperia USA Inc. BZX84-B16/DG/B3,21
- Part No.:
- BZX84-B16/DG/B3,21
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B16/DG/B3,21.pdf
- Description:
- DIODE ZENER 16V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,088
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Product details
Overview
BZX84-B16/DG/B3,21 from Nexperia is a 16 V, 250 mW surface-mount Zener diode in SOT23 package with ±2% tolerance, 100 nA maximum reverse leakage at 12 V, and 15 Ω dynamic impedance, used for precision voltage regulation in low-power sensor biasing and reference circuits.
For engineers reviewing the BZX84-B16/DG/B3,21 datasheet, BZX84-B16/DG/B3,21 pinout, BZX84-B16/DG/B3,21 application, or BZX84-B16/DG/B3,21 equivalent, key selection criteria include Zener voltage tolerance, power dissipation limit, dynamic impedance, reverse leakage current, and SOT23 thermal performance in space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and supply conditions. It features a tightly controlled 16.0 V nominal Zener voltage with ±2% initial tolerance and exhibits low dynamic impedance (15 Ω) to minimize output voltage variation with current changes.
Designed for low-current regulation, it supports continuous reverse current up to 5 mA at 25 °C ambient, with thermal resistance of 500 K/W (junction-to-ambient) in standard SOT23 mounting. Its 250 mW power rating is derated linearly above 25 °C per the manufacturer's specified slope.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.0 V ±2% at IZ = 5 mA - ensures precise reference stability in analog front-ends |
| Power Dissipation (Ptot) | 250 mW at Tamb = 25 °C - defines maximum continuous DC power handling on standard FR4 |
| Dynamic Impedance (ZZT) | 15 Ω at IZ = 5 mA - limits output voltage shift to ≤75 mV for ±1.25 mA current change |
| Reverse Leakage (IR) | ≤100 nA at VR = 12 V - preserves low quiescent current in battery-powered sensor nodes |
| Package | SOT23 - enables 2.9 mm × 1.3 mm footprint and reflow-compatible assembly |
| Thermal Resistance (RthJA) | 500 K/W - requires layout-aware copper pour to sustain rated power at elevated ambient |
Pinout & Package
Three-terminal SOT23 package: anode (pin 1), cathode (pin 2), and unused terminal (pin 3) - pin 3 is internally unconnected and electrically isolated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; reverse-biased during Zener operation |
| Pin 2 | Cathode | Connected to higher-potential node; voltage reference output point |
| Pin 3 | No Connect | Internally floating; must not be soldered to PCB trace or plane |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±2% at 5 mA - reduces calibration burden in precision ADC reference designs |
| Low dynamic impedance | 15 Ω - maintains <±0.1 V regulation error over 1–10 mA load range |
| Guaranteed low leakage | ≤100 nA at 12 V - avoids signal path loading in high-impedance op-amp feedback networks |
| SOT23 thermal performance | 500 K/W RthJA - supports 250 mW operation with minimal copper area in compact layouts |
Applications
| Industrial Sensor Signal Conditioning | Portable Medical Device Reference |
|---|---|
Use Scenario: Providing stable 16 V bias for bridge sensor excitation in temperature-compensated pressure transducers. IC Role / Device Role / Timing Role: Zener voltage reference source for analog signal chain biasing. Use Value: ±2% tolerance and 15 Ω ZZT ensure excitation voltage drift remains <±0.2 V across operating current variations. | Use Scenario: Generating a clean 16 V reference for low-noise instrumentation amplifier stages in handheld ECG monitors. IC Role / Device Role / Timing Role: Precision shunt reference for analog front-end gain-setting networks. Use Value: 100 nA reverse leakage prevents input bias current errors in pA-level sensor interfaces. |
| IoT Node Power Management | Automotive Body Control Module |
Use Scenario: Regulating auxiliary 16 V rail for ultra-low-power microcontroller peripherals in NB-IoT asset trackers. IC Role / Device Role / Timing Role: Low-power shunt regulator for secondary voltage domain stabilization. Use Value: 250 mW rating and SOT23 footprint enable efficient use of limited PCB area without heatsinking. | Use Scenario: Supplying stable 16 V to LIN transceiver bias circuitry in door module ECUs. IC Role / Device Role / Timing Role: Voltage clamp and reference for LIN physical layer interface protection. Use Value: Robust 15 Ω ZZT maintains bus voltage integrity during load dump transients within automotive spec limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16,215 | ±5% tolerance, same SOT23 package and 250 mW rating | Higher voltage uncertainty impacts calibration-critical references | Select when cost sensitivity outweighs precision requirements |
| MMSZ4687T1G | 16 V ±5%, 500 mW rating, SOD-123 package | Larger footprint and higher power dissipation capability | Choose for higher current loads (>10 mA) where thermal margin is critical |
Compared with BZX84-B16/DG/B3,21, the BZX84-C16,215 trades voltage accuracy for lower unit cost, while MMSZ4687T1G offers double the power rating in a larger package-making the original optimal for space-constrained, precision-biased analog circuits.
Availability
BZX84-B16/DG/B3,21 is available at Aetrix Electronics and suitable for industrial sensor conditioning, portable medical device reference design, and IoT node power management requiring stable component supply and consistent parametric performance across production batches.
Supply support for BZX84-B16/DG/B3,21 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 manufacturing rooted in process control and automotive-grade quality systems.
This part belongs to the BZX84 series of precision Zener diodes, engineered for stable voltage reference and regulation in space-constrained, low-power analog applications across consumer, industrial, and automotive segments.
FAQ
What is the maximum reverse current this Zener diode can handle continuously?
The BZX84-B16/DG/B3,21 is rated for 5 mA Zener test current and supports continuous reverse current up to 5 mA at 25 °C ambient. Derating applies above that temperature: power dissipation drops linearly to zero at 150 °C junction temperature, limiting usable current in high-temperature environments.
Does pin 3 serve any electrical function in the SOT23 package?
No, pin 3 is an unconnected terminal with no internal bond wire or silicon connection. It is electrically isolated and must remain floating-soldering it to ground or any net may cause mechanical stress or unintended thermal paths without functional benefit.
How does the ±2% tolerance affect system-level calibration?
A ±2% tolerance means the actual Zener voltage falls between 15.68 V and 16.32 V at 5 mA. In calibration-sensitive applications like sensor excitation, this introduces a fixed offset that must be measured and compensated in firmware or trimmed during production, unlike tighter-tolerance references requiring less correction.
Can this diode replace a 1N4744A in existing designs?
No-1N4744A is a 14 V, 1 W through-hole Zener in DO-41 package. The BZX84-B16/DG/B3,21 differs in voltage (16 V vs. 14 V), power rating (250 mW vs. 1 W), package (SOT23 vs. DO-41), and thermal behavior. Direct substitution would require layout, thermal, and schematic validation.
BZX84-B16/DG/B3,21 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±2%
- Power - Max:
- 250 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:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-B16/DG/B3,21 FAQ
1.How can I place an order for BZX84-B16/DG/B3,21 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B16/DG/B3,21 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 BZX84-B16/DG/B3,21 reliable?
The price and inventory of BZX84-B16/DG/B3,21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B16/DG/B3,21 is usually 5 days.
3.What payment methods are accepted for BZX84-B16/DG/B3,21?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B16/DG/B3,21 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B16/DG/B3,21?
BZX84-B16/DG/B3,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B16/DG/B3,21 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 BZX84-B16/DG/B3,21?
For technical support, including BZX84-B16/DG/B3,21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B16/DG/B3,21 requirements.
6.How does Aetrix verify that BZX84-B16/DG/B3,21 is sourced from the original manufacturer or authorized distributors?
All BZX84-B16/DG/B3,21 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 BZX84-B16/DG/B3,21 meets industry standards.
7.What is the process for return or replacement of BZX84-B16/DG/B3,21?
All BZX84-B16/DG/B3,21 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B16/DG/B3,21, 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 BZX84-B16/DG/B3,21 part is unused and in its original packaging.
Return procedure for BZX84-B16/DG/B3,21:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B16/DG/B3,21 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
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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