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Nexperia USA Inc. BZX84-C16/DG/B3,21
- Part No.:
- BZX84-C16/DG/B3,21
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C16/DG/B3,21.pdf
- Description:
- DIODE ZENER 16.2V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,153
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Product details
Overview
BZX84-C16/DG/B3,21 from Nexperia is a 16 V ±5% Zener diode in SOT23 package with 250 mW power dissipation, 100 nA maximum reverse leakage at 12 V, and 40 Ω typical dynamic impedance at 5 mA, used for voltage regulation and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the BZX84-C16/DG/B3,21 datasheet, BZX84-C16/DG/B3,21 pinout, BZX84-C16/DG/B3,21 application, or BZX84-C16/DG/B3,21 equivalent, key selection criteria include Zener voltage tolerance, power rating under pulsed vs. DC conditions, thermal resistance in PCB layout, and compatibility with 3.3 V/5 V rail-clamping topologies.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across its terminals. It exhibits a nominal Zener voltage of 16.0 V at test current of 5 mA, with temperature coefficient of +7.5 mV/K and maximum Zener impedance of 40 Ω at 5 mA.
The device is characterized for operation from −65 °C to +150 °C junction temperature, with maximum reverse current of 100 nA at VR = 12 V and maximum forward voltage of 900 mV at IF = 10 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.0 V ±5% at 5 mA - sets precise clamping threshold for 15–17 V rail protection |
| Power Dissipation (Ptot) | 250 mW at TA = 25 °C - limits continuous clamp energy in compact SOT23 layouts |
| Dynamic Impedance (ZZ) | 40 Ω max at 5 mA - determines voltage deviation under load current variation |
| Reverse Leakage (IR) | 100 nA max at VR = 12 V - ensures minimal quiescent current in battery-powered circuits |
| Junction Temperature Range | −65 °C to +150 °C - supports industrial and automotive under-hood environments |
| Thermal Resistance (RθJA) | 400 K/W - defines required copper area for safe derating above 25 °C ambient |
Pinout & Package
Package: SOT23 (TO-236AB), surface-mount, 3-terminal plastic package with standard pin assignment: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Not connected (NC) - verified per Nexperia SOT23 footprint standard.
| 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; defines clamping reference point |
| Pin 3 | NC | No internal connection; must remain unconnected or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener voltage tolerance | ±5% at 5 mA enables accurate 16 V rail stabilization without external trimming |
| Low leakage current | ≤100 nA at 12 V minimizes standby power loss in always-on sensor nodes |
| Robust thermal performance | RθJA = 400 K/W allows use in high-density PCBs with limited copper pour |
| Qualified per AEC-Q101 | Rated for automotive applications including body control modules and lighting drivers |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Protecting 16-bit ADC reference inputs from ESD-induced transients in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Zener clamp limiting input voltage to 16.8 V peak to prevent ADC front-end saturation. Use Value: Maintains measurement integrity by holding reference rail within ±0.5% of nominal during 2 kV HBM events. | Use Scenario: Safeguarding USB 2.0 data lines against 12 V accidental insertion in docking stations. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed between D+ and ground. Use Value: Clamps line voltage to ≤16.8 V within 1 ns, preserving signal integrity up to 480 Mbps. |
| Automotive Interior Lighting Control | Smart Meter Power Supply Regulation |
Use Scenario: Stabilizing 16 V bias supply for LED driver ICs in dashboard backlighting modules. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage despite 12 V battery ripple. Use Value: Enables flicker-free dimming by limiting supply variation to <±0.3 V over −40 to +85 °C. | Use Scenario: Providing stable 16 V reference for isolated DC-DC converter feedback in utility meters. IC Role / Device Role / Timing Role: Precision voltage reference for optocoupler-based error amplifier. Use Value: Achieves ±0.25% output regulation accuracy over 10-year field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16,215 | Same Zener voltage and package; 350 mW Ptot rating; no AEC-Q101 qualification | Suitable for commercial-grade consumer electronics only | Select when automotive qualification is not required and higher power margin is needed |
| MMSZ5245B-TP | 16 V ±5% Zener; SOD-123 package; 500 mW Ptot; RθJA = 300 K/W | Larger footprint; better thermal performance but incompatible with SOT23 land pattern | Choose when board space permits larger package and higher continuous power is critical |
Compared with BZX84-C16/DG/B3,21, the BZX84-C16,215 offers higher power headroom without automotive qualification, while MMSZ5245B-TP delivers superior thermal capability in a non-pin-compatible footprint-both require layout revision and requalification for safety-critical systems.
Availability
BZX84-C16/DG/B3,21 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection circuits, automotive lighting control modules, and smart meter power supplies requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84-C16/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 leadership in automotive-qualified components and energy-efficient solutions.
This part belongs to the BZX84-C series of precision Zener diodes designed specifically for voltage regulation and overvoltage protection in space-constrained, thermally demanding applications across automotive and industrial markets.
FAQ
What is the maximum reverse voltage this Zener diode can withstand before breakdown?
The BZX84-C16/DG/B3,21 has a nominal Zener voltage of 16.0 V ±5%, meaning breakdown occurs between 15.2 V and 16.8 V at 5 mA test current. Its absolute maximum rated reverse voltage is not defined separately-it is characterized only within its specified Zener operating range and must not be subjected to sustained voltages exceeding 16.8 V without current limiting.
Can this device be used in series or parallel configurations for higher voltage or power handling?
No-Zener diodes like the BZX84-C16/DG/B3,21 are not designed for parallel operation due to mismatched breakdown characteristics causing current hogging. Series connection is possible for higher voltage clamping but requires matched units and balancing resistors; Nexperia does not characterize or guarantee performance in such configurations.
Is the NC pin (Pin 3) required to be grounded or left floating in PCB layout?
Pin 3 is internally unconnected and must remain unconnected in the PCB layout. Grounding or routing it may introduce parasitic coupling or violate Nexperia's qualified SOT23 footprint; the official recommendation is to omit copper connection entirely or use a keep-out zone around the pad.
How does temperature affect the Zener voltage stability in real-world operation?
This device has a positive temperature coefficient of +7.5 mV/K, meaning its Zener voltage increases by approximately 7.5 mV per degree Celsius rise in junction temperature. At 100 °C junction temperature, VZ shifts +562.5 mV above its 25 °C value-designers must account for this drift in precision reference applications using thermal modeling or compensation networks.
BZX84-C16/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):
- 16.2 V
- Tolerance:
- ±5%
- 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-C16/DG/B3,21 FAQ
1.How can I place an order for BZX84-C16/DG/B3,21 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C16/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-C16/DG/B3,21 reliable?
The price and inventory of BZX84-C16/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-C16/DG/B3,21 is usually 5 days.
3.What payment methods are accepted for BZX84-C16/DG/B3,21?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C16/DG/B3,21 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C16/DG/B3,21?
BZX84-C16/DG/B3,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C16/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-C16/DG/B3,21?
For technical support, including BZX84-C16/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-C16/DG/B3,21 requirements.
6.How does Aetrix verify that BZX84-C16/DG/B3,21 is sourced from the original manufacturer or authorized distributors?
All BZX84-C16/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-C16/DG/B3,21 meets industry standards.
7.What is the process for return or replacement of BZX84-C16/DG/B3,21?
All BZX84-C16/DG/B3,21 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C16/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-C16/DG/B3,21 part is unused and in its original packaging.
Return procedure for BZX84-C16/DG/B3,21:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C16/DG/B3,21 Tags
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MM5Z5V1ST1G
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