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onsemi BZX84C16ET1
- Part No.:
- BZX84C16ET1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C16ET1.pdf
- Description:
- DIODE ZENER 16V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,949
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Product details
Overview
BZX84C16ET1 from onsemi is a 16 V, 225 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and reference applications. It delivers nominal Zener voltage of 16.0 V at 5 mA test current, with dynamic impedance of 40 Ω and reverse leakage current ≤0.05 µA at 12.8 V, suitable for low-power voltage clamping in portable electronics.
For engineers reviewing the BZX84C16ET1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±1.1 V), temperature coefficient (+11.2 mV/°C), ESD robustness (>16 kV HBM), and thermal resistance (556 °C/W on FR-5 board).
Technical Context
The BZX84C16ET1 operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable voltage across its cathode-anode terminals. Its Zener mechanism provides predictable regulation with minimal variation over temperature and current, supported by a measured temperature coefficient of +11.2 mV/°C at 5 mA.
It features a defined pinout (Anode–Pin 1, NC–Pin 2, Cathode–Pin 3) and is rated for peak pulse power of 225 W (8 × 20 µs), enabling transient suppression in addition to steady-state regulation. The SOT-23 package supports automated assembly and high-density PCB layouts while maintaining thermal performance up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.3–17.1 V @ 5 mA - defines regulated output range under standard test conditions |
| Power Dissipation (PD) | 225 mW on FR-5 board - sets maximum continuous DC power handling at 25°C ambient |
| Zener Impedance (ZZT) | 40 Ω @ 5 mA - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage (IR) | ≤0.05 µA @ 12.8 V - ensures minimal standby current in high-impedance bias networks |
| Temperature Coefficient | +11.2 mV/°C @ 5 mA - quantifies voltage drift per degree Celsius, critical for temperature-sensitive references |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct handling and board-level integration without additional protection |
| Capacitance (C) | 105 pF @ 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
Pinout & Package
SOT-23 (Case 318, Style 8) surface-mount package with 3 terminals; void-free thermosetting plastic case, UL 94 V-0 flammability rating, and corrosion-resistant solderable finish. Maximum soldering temperature: 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; reverse-biased during Zener operation |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Reverse-bias terminal; connected to regulated voltage node or ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free Compliant Packaging | RoHS-compliant SOT-23 with "G" suffix - meets global environmental compliance requirements without derating |
| High ESD Robustness | Class 3 Human Body Model (>16 kV) - eliminates need for external ESD protection in handheld interfaces |
| Low-Leakage Regulation | 0.05 µA max reverse leakage at 80% VZ - preserves battery life in always-on sensor bias networks |
| Stable Temperature Behavior | +11.2 mV/°C TC with positive slope - enables predictable compensation in temperature-compensated references |
| Automated Assembly Optimized | Standard SOT-23 footprint with defined polarity band - supports high-yield pick-and-place and reflow processes |
Applications
| Portable Power Management | Signal Level Clamping |
|---|---|
|
Use Scenario: Voltage reference for ADC biasing and LDO feedback in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing stable 16 V reference for analog front-end circuitry. Use Value: Enables accurate 12-bit ADC conversion with <±0.5% full-scale error over −40°C to +85°C ambient. |
Use Scenario: Input protection clamp on RS-232 receiver lines exposed to ESD events. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting input swing to ±16 V relative to ground. Use Value: Absorbs >16 kV HBM pulses without degradation, preserving receiver IC integrity per IEC 61000-4-2 Level 4. |
| Low-Power Reference Circuits | Microcontroller Reset Supervision |
|
Use Scenario: Precision reference for op-amp-based current source in wearable health monitors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed 16 V node for feedback loop stability. Use Value: Maintains <±1.5% output variation across 1–20 mA load current range, ensuring consistent LED drive current. |
Use Scenario: Brown-out detection threshold element in ARM Cortex-M0+ microcontroller systems. IC Role / Device Role / Timing Role: Zener-based comparator input reference set to 16 V for 3.3 V rail monitoring via resistor divider. Use Value: Triggers reset when supply drops below 2.8 V with <10 ms response latency and zero external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5245BLT1 | 16 V nominal, 200 mW rating, 30 Ω ZZT, −2 mV/°C TC | Lower power and tighter impedance but negative TC - less stable over wide temperature ranges | Prefer for cost-sensitive, room-temperature-only applications where lower dynamic impedance is prioritized |
| BZX84-C16-TP | 16 V nominal, 350 mW rating, 45 Ω ZZT, +12 mV/°C TC, same SOT-23 package | Higher power rating allows higher continuous current but slightly higher impedance and TC | Choose when operating near thermal limits or requiring margin above 225 mW dissipation |
Compared with MMBZ5245BLT1 and BZX84-C16-TP, the BZX84C16ET1 offers balanced trade-offs: moderate power (225 mW), industry-standard TC (+11.2 mV/°C), and proven reliability in high-volume portable designs - making it optimal for general-purpose 16 V regulation where thermal and ESD margins are both critical.
Availability
BZX84C16ET1 is available at Aetrix Electronics and suitable for portable power management, signal level clamping, and low-power reference circuits requiring stable component supply and RoHS-compliant sourcing.
Supply support for BZX84C16ET1 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX84C16ET1 belongs to the BZX84CxxxET1 series of Zener regulators engineered for space-constrained, high-reliability voltage reference and clamping in portable electronics - emphasizing low leakage, high ESD immunity, and automated assembly compatibility.
FAQ
What is the nominal Zener voltage and tolerance of the BZX84C16ET1?
The BZX84C16ET1 has a nominal Zener voltage of 16.0 V with a specified range of 15.3 V to 17.1 V at 5 mA test current. This ±1.1 V tolerance reflects manufacturing variation and ensures predictable regulation within defined design margins. The BZX84C16ET1 maintains this specification across its qualified operating temperature range and is validated per onsemi's production test flow.
Does the BZX84C16ET1 have a no-connect pin, and how should it be handled on the PCB?
Yes, Pin 2 of the BZX84C16ET1 is internally not connected and must remain unconnected on the PCB. No trace, pad, or via should be routed to Pin 2. This design simplifies layout and avoids unintended parasitic coupling. The BZX84C16ET1 pinout (Anode–1, NC–2, Cathode–3) is confirmed in the official onsemi datasheet and applies exclusively to this SOT-23 variant.
What is the maximum continuous power dissipation for the BZX84C16ET1 on a standard FR-5 board?
The BZX84C16ET1 is rated for 225 mW total power dissipation on an FR-5 board at 25°C ambient, derating linearly at 1.8 mW/°C above that temperature. This value is measured under standardized JEDEC conditions and defines the upper limit for reliable DC operation. Exceeding this limit risks thermal runaway or parametric shift in the BZX84C16ET1's Zener characteristics.
How does the temperature coefficient of the BZX84C16ET1 affect its performance in varying ambient conditions?
The BZX84C16ET1 exhibits a temperature coefficient of +11.2 mV/°C at 5 mA, meaning its Zener voltage increases by approximately 11.2 mV per degree Celsius rise in junction temperature. This positive TC must be factored into precision reference designs - for example, a 50°C ambient shift introduces ~560 mV drift. The BZX84C16ET1's TC is characterized and guaranteed across −65°C to +150°C.
Is the BZX84C16ET1 suitable for ESD protection in handheld devices?
Yes, the BZX84C16ET1 is rated Class 3 (>16 kV) per Human Body Model, making it suitable for primary or secondary ESD protection in handheld devices such as Bluetooth headsets and medical wearables. Its fast Zener turn-on and low clamping voltage (≤17.1 V) allow it to shunt transient energy before downstream ICs are damaged. The BZX84C16ET1's robustness is verified per AEC-Q200 stress testing protocols.
BZX84C16ET1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- 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:
- ±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)
BZX84C16ET1 FAQ
1.How can I place an order for BZX84C16ET1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C16ET1 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 BZX84C16ET1 reliable?
The price and inventory of BZX84C16ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C16ET1 is usually 5 days.
3.What payment methods are accepted for BZX84C16ET1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C16ET1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C16ET1?
BZX84C16ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C16ET1 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 BZX84C16ET1?
For technical support, including BZX84C16ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C16ET1 requirements.
6.How does Aetrix verify that BZX84C16ET1 is sourced from the original manufacturer or authorized distributors?
All BZX84C16ET1 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 BZX84C16ET1 meets industry standards.
7.What is the process for return or replacement of BZX84C16ET1?
All BZX84C16ET1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C16ET1, 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 BZX84C16ET1 part is unused and in its original packaging.
Return procedure for BZX84C16ET1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C16ET1 Tags
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