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onsemi BZX84B16LT1
- Part No.:
- BZX84B16LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
BZX84B16LT1.pdf
- Description:
- DIODE ZENER 225MW 16V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,437
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Product details
Overview
BZX84B16LT1 from onsemi is a tight-tolerance Zener diode in SOT-23 package, providing precise 16 V voltage regulation at 5 mA test current with ±2% nominal voltage tolerance (15.7–16.3 V), 40 Ω dynamic impedance, and 0.05 µA reverse leakage at 11.2 V. It serves as a stable reference or overvoltage clamp in power supply feedback loops, sensor biasing, and portable device voltage monitoring.
For engineers reviewing the BZX84B16LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 16 V nominal Zener voltage, ±2% tolerance, 250 mW power rating on FR-5 board, SOT-23 footprint compatibility, and −65 °C to +150 °C operating temperature range.
Technical Context
This device operates as a two-terminal voltage reference using controlled avalanche breakdown in silicon. Its Zener voltage is specified at IZT = 5 mA with a temperature coefficient of +10.4 mV/°C, indicating positive drift above 6 V. The 250 mW power dissipation rating applies to FR-5 PCB mounting with derating above 25 °C.
The SOT-23 package features three terminals: Pin 1 (Anode), Pin 2 (No Connection), and Pin 3 (Cathode), with cathode polarity marked by a band. It achieves Class 3 ESD robustness (>16 kV HBM) and complies with RoHS and Pb-free requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 16 V at IZT = 5 mA - provides stable reference point for feedback networks requiring tight regulation |
| Zener Tolerance | ±2% (15.7–16.3 V) - enables accurate voltage thresholding without post-calibration |
| Dynamic Impedance | 40 Ω at IZT = 5 mA - limits output voltage variation under load current changes |
| Power Dissipation | 250 mW on FR-5 board - supports compact, low-power regulation in space-constrained layouts |
| Reverse Leakage | 0.05 µA at VR = 11.2 V - ensures minimal quiescent current in standby or battery-powered modes |
| Temperature Coefficient | +10.4 mV/°C - quantifies predictable positive voltage drift across industrial temperature range |
| Capacitance | 105 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and transient response |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; UL 94 V-0 flammability rating; max soldering temperature 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of regulated node; reverse-biased during Zener operation |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential side (e.g., supply rail); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±2% at 5 mA - reduces need for trimming resistors in precision reference circuits |
| Low leakage current | 0.05 µA at 11.2 V - preserves battery life in always-on sensing nodes |
| ESD robustness | Class 3 (>16 kV HBM) - withstands handling and system-level ESD events without degradation |
| Pb-free & RoHS compliant | Meets global environmental directives - suitable for export-controlled and consumer-grade designs |
| Thermal stability | −65 °C to +150 °C junction range - supports operation in automotive under-hood and industrial environments |
Applications
| Power Supply Feedback Reference | Sensor Biasing Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in adjustable DC-DC converter feedback path. IC Role / Device Role / Timing Role: Zener reference providing fixed voltage threshold to error amplifier input. Use Value: Enables ±1% output regulation accuracy using standard TL431-compatible topology with minimal external components. |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or bridge sensors. IC Role / Device Role / Timing Role: Precision voltage source establishing known bias point for ratiometric measurement. Use Value: Maintains sensor linearity and repeatability across temperature due to tight 16 V tolerance and low TC drift. |
| Overvoltage Clamp Protection | Portable Device Voltage Monitoring |
Use Scenario: Limiting input voltage to microcontroller GPIO or ADC input during surge events. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess current when rail exceeds 16.3 V. Use Value: Protects downstream logic with fast response and predictable turn-on threshold, avoiding damage from 12 V–15 V transients. |
Use Scenario: Monitoring battery pack voltage in handheld medical or test equipment. IC Role / Device Role / Timing Role: Reference diode in comparator-based low-battery detection circuit. Use Value: Triggers alert at precisely 15.7 V (low end of tolerance), enabling calibrated state-of-charge estimation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C16LT1G | Standard-tolerance version (±5%, 15.3–17.1 V); same SOT-23 package and 40 Ω Zzt | Acceptable where ±5% regulation suffices; higher leakage (0.05 µA vs. same) but identical thermal specs | Select for cost-sensitive designs where tighter tolerance is unnecessary |
| SZBZX84B16LT1G | AEC-Q101 qualified; identical electrical specs and SOT-23 package; automotive-grade process control and PPAP support | Required for automotive body electronics, infotainment power rails, or any AEC-compliant system | Choose when automotive qualification, extended reliability testing, or change control documentation is mandatory |
Compared with BZX84B16LT1, BZX84C16LT1G offers lower cost but looser voltage control, while SZBZX84B16LT1G adds automotive qualification without altering regulation performance - enabling direct substitution where AEC compliance is required.
Availability
BZX84B16LT1 is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing circuits, overvoltage clamp protection, and portable device voltage monitoring requiring stable component supply and long-term sourcing continuity.
Supply support for BZX84B16LT1 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 specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX84BxxxLT1G series belongs to onsemi's precision Zener regulator product line, engineered for high-density surface-mount applications demanding tight voltage tolerance, low leakage, and robust ESD immunity in portable and space-constrained systems.
FAQ
What is the exact Zener voltage tolerance of BZX84B16LT1?
The BZX84B16LT1 has a nominal Zener voltage of 16 V with a tight tolerance of ±2%, specified as 15.7 V minimum to 16.3 V maximum at IZT = 5 mA and TA = 25 °C. This tolerance is confirmed in the "BZX84BxxxL (Tight Tolerance Series)" table on page 4 of the official onsemi datasheet.
Does BZX84B16LT1 have a functional third pin?
No, BZX84B16LT1 uses a three-terminal SOT-23 package but only two terminals are electrically active: Pin 1 (Anode) and Pin 3 (Cathode). Pin 2 is internally unconnected and must remain floating on the PCB - it serves no electrical function and should not be routed or grounded.
Can BZX84B16LT1 replace BZX84C16LT1G in an existing design?
BZX84B16LT1 can replace BZX84C16LT1G where tighter voltage control is needed, as both share identical SOT-23 packaging, thermal ratings, and dynamic impedance. However, the BZX84B16LT1's ±2% tolerance (vs. ±5% for the C-series) may shift feedback loop setpoints - verify regulation accuracy in final circuit conditions before substitution.
What is the maximum power dissipation of BZX84B16LT1 on a standard PCB?
BZX84B16LT1 is rated for 250 mW total power dissipation on FR-5 board at TA = 25 °C, with linear derating of 2.0 mW/°C above that temperature. This value assumes proper copper pour and thermal relief design per onsemi's recommended layout guidelines in the datasheet.
Is BZX84B16LT1 suitable for automotive applications?
The standard BZX84B16LT1 is not AEC-Q101 qualified. For automotive use, select the SZBZX84B16LT1G variant, which shares identical electrical specifications and SOT-23 packaging but includes automotive-grade process controls, PPAP documentation, and extended reliability validation - all confirmed in the same datasheet's ordering information table.
BZX84B16LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
BZX84B16LT1 FAQ
1.How can I place an order for BZX84B16LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84B16LT1 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 BZX84B16LT1 reliable?
The price and inventory of BZX84B16LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B16LT1 is usually 5 days.
3.What payment methods are accepted for BZX84B16LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B16LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84B16LT1?
BZX84B16LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84B16LT1 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 BZX84B16LT1?
For technical support, including BZX84B16LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B16LT1 requirements.
6.How does Aetrix verify that BZX84B16LT1 is sourced from the original manufacturer or authorized distributors?
All BZX84B16LT1 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 BZX84B16LT1 meets industry standards.
7.What is the process for return or replacement of BZX84B16LT1?
All BZX84B16LT1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B16LT1, 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 BZX84B16LT1 part is unused and in its original packaging.
Return procedure for BZX84B16LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84B16LT1 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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