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onsemi BZX84C16LT1
- Part No.:
- BZX84C16LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C16LT1.pdf
- Description:
- DIODE ZENER 16V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,755
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Product details
Overview
BZX84C16LT1 from onsemi is a 16 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 40 Ω dynamic impedance at 5 mA test current and 0.05 µA reverse leakage at 12.8 V, used for voltage regulation in space-constrained portable electronics.
For engineers reviewing the BZX84C16LT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal behavior, SOT-23 terminal mapping, real-world use cases, and validated alternative parts for precision voltage reference design.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output by conducting reverse current above its nominal 16 V Zener breakdown voltage. It exhibits a +10.4 mV/°C temperature coefficient and 105 pF capacitance at 0 V bias, enabling predictable drift compensation in feedback networks.
The SOT-23 package features an isolated terminal 2 (no connection), anode at pin 1, and cathode at pin 3 - optimized for automated placement and high-density PCB layouts. Its ESD rating exceeds 16 kV (HBM) and thermal resistance is 556 °C/W on FR-5 substrate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 15.3–17.1 V @ 5 mA; ensures stable 16 V reference under typical bias conditions |
| Power Dissipation | 225 mW on FR-5 board @ 25°C; defines maximum continuous regulation load without derating |
| Zener Impedance | 40 Ω @ 5 mA; determines output voltage stability under varying load current |
| Reverse Leakage | 0.05 µA @ 12.8 V; guarantees minimal quiescent current in standby regulation circuits |
| Capacitance | 105 pF @ 0 V, 1 MHz; impacts high-frequency noise filtering and AC bypass performance |
| Temp. Coefficient | +10.4 mV/°C @ 5 mA; enables accurate thermal drift modeling in precision references |
| ESD Rating | Class 3 (>16 kV HBM); supports robust handling in manual assembly and field-replaceable modules |
Pinout & Package
SOT-23 surface-mount plastic package (Case 318, Style 8), void-free thermosetting material, UL 94 V-0 flammability rating, cathode indicated by band, max soldering temperature 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation |
| 2 | No Connection | Internally unconnected; must remain floating on PCB layout |
| 3 | Cathode | Connected to regulated voltage rail; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Compliant | RoHS-compliant SOT-23 package (G-suffix variant available) |
| Tight Thermal Resistance | 556 °C/W junction-to-ambient on FR-5 board enables reliable operation up to +125°C ambient |
| High ESD Robustness | 16 kV Human Body Model rating reduces risk of damage during handling and board-level testing |
| Optimized for Automation | Standardized SOT-23 footprint and tape-and-reel packaging (3000/reel) support high-speed pick-and-place |
| Low Capacitance Variant | 105 pF at 0 V bias minimizes signal coupling in RF-adjacent or high-speed digital supply rails |
Applications
| Portable Power Management | USB-C PD Feedback Network |
|---|---|
Use Scenario: Regulating 16 V auxiliary rail in battery-powered handheld instruments with tight board area constraints. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for op-amp comparators and LDO enable thresholds. Use Value: 225 mW rating and SOT-23 size allow integration into compact 4-layer PCBs without thermal vias or heatsinking. |
Use Scenario: Setting precise 16 V overvoltage protection threshold in USB-C power delivery sink controllers. IC Role / Device Role / Timing Role: Zener clamping element in feedback divider network of buck-boost controller ICs like MPQ4257. Use Value: ±5% tolerance and 40 Ω impedance ensure repeatable trip point across production batches and temperature ranges. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module |
Use Scenario: Providing stable 16 V reference for 24 V system analog front-end amplifiers in factory automation sensors. IC Role / Device Role / Timing Role: Precision voltage clamp protecting ADC input stages from transients while maintaining DC accuracy. Use Value: 0.05 µA leakage at 12.8 V prevents loading of high-impedance sensor bridges and maintains >12-bit effective resolution. |
Use Scenario: Regulating 16 V supply for LIN transceiver biasing in automotive door module ECUs operating from 9–16 V battery input. IC Role / Device Role / Timing Role: Low-power shunt regulator stabilizing local VCC for communication ICs during cold-crank events. Use Value: +10.4 mV/°C tempco allows predictable offset correction in firmware calibration routines across −40°C to +125°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C16LT3 | Same electrical specs; differs only in tape-and-reel packaging (10,000/reel vs. 3000/reel) | Identical functional use; selected for high-volume automated assembly requiring larger reel quantity | Choose BZX84C16LT3 when optimizing for line-side feeder change frequency and minimizing reel swaps. |
| BZX84B16LT1 | Tighter ±2% Zener tolerance (15.7–16.3 V), same 40 Ω Zz, identical SOT-23 pinout and thermal specs | Used where tighter regulation accuracy is required, e.g., precision ADC reference buffers or calibration circuitry | Select BZX84B16LT1 only if system-level error budget demands sub-±3% voltage reference stability. |
Compared with BZX84C16LT1, BZX84C16LT3 offers no electrical difference but improves production throughput via larger reel count, while BZX84B16LT1 trades wider tolerance for higher accuracy - making it suitable only when ±2% regulation is mandatory and cost premium is acceptable.
Availability
BZX84C16LT1 is available at Aetrix Electronics and suitable for portable power management, USB-C PD feedback networks, industrial sensor signal conditioning, and automotive body control modules requiring stable component supply with consistent parametric performance across manufacturing lots.
Supply support for BZX84C16LT1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, and consumer markets.
The BZX84C16LT1 belongs to the BZX84CxxxLT1 series of standard-tolerance Zener regulators designed specifically for space-constrained voltage reference and overvoltage protection in portable and high-density electronics.
FAQ
What is the Zener voltage tolerance of BZX84C16LT1?
The BZX84C16LT1 has a nominal Zener voltage of 16 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 15.3 V and 17.1 V when tested at 5 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official datasheet and applies strictly to the BZX84C16LT1 variant - not the tighter-tolerance BZX84B16LT1 series.
Does BZX84C16LT1 have a connected pin 2?
No, pin 2 of the BZX84C16LT1 is internally unconnected (NC), as explicitly stated in the Pinout section on pages 3 and 7 of the datasheet. The device uses only pins 1 (anode) and 3 (cathode) for operation; pin 2 must remain unconnected on the PCB layout to avoid unintended parasitic paths or assembly defects.
What is the maximum power dissipation of BZX84C16LT1 on FR-5 board?
The BZX84C16LT1 is rated for 225 mW total power dissipation on FR-5 board at 25°C ambient temperature, with a derating factor of 1.8 mW/°C above that temperature. This value is specified in the Maximum Ratings table on page 2 and defines the upper thermal limit for continuous DC regulation without forced cooling or thermal relief.
Is BZX84C16LT1 RoHS compliant?
Yes, the BZX84C16LT1 is RoHS compliant when ordered with the "G" suffix (e.g., BZX84C16LT1G), indicating Pb-free packaging. The base part number BZX84C16LT1 may be supplied in either standard or Pb-free form depending on date code and lot traceability - full compliance documentation is available per order batch from onsemi's material declarations.
What is the Zener impedance of BZX84C16LT1 at 20 mA?
The BZX84C16LT1 has a maximum Zener impedance of 200 Ω when tested at 20 mA (IZT3), as listed in the Electrical Characteristics table on page 3. This value reflects higher dynamic resistance under heavier load conditions compared to its 40 Ω rating at 5 mA, directly impacting regulation accuracy in high-current shunt applications.
BZX84C16LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- BZX84CxxxLT1
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±6%
- Power - Max:
- 225 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
BZX84C16LT1 FAQ
1.How can I place an order for BZX84C16LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C16LT1 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 BZX84C16LT1 reliable?
The price and inventory of BZX84C16LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C16LT1 is usually 5 days.
3.What payment methods are accepted for BZX84C16LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C16LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C16LT1?
BZX84C16LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C16LT1 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 BZX84C16LT1?
For technical support, including BZX84C16LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C16LT1 requirements.
6.How does Aetrix verify that BZX84C16LT1 is sourced from the original manufacturer or authorized distributors?
All BZX84C16LT1 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 BZX84C16LT1 meets industry standards.
7.What is the process for return or replacement of BZX84C16LT1?
All BZX84C16LT1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C16LT1, 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 BZX84C16LT1 part is unused and in its original packaging.
Return procedure for BZX84C16LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C16LT1 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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