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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi SZBZX84C16ET3G

Name: SZBZX84C16ET3G
Brand: onsemi
SKU: SZBZX84C16ET3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZBZX84C16ET3G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: SZBZX84C16ET3G.pdf

Description:: DIODE ZENER 16V 225MW SOT23-3

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Product details

Overview

SZBZX84C16ET3G from onsemi is a 250 mW, 16 V Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 16.0 V at 5 mA test current, with dynamic impedance of 40 Ω, ±5% voltage tolerance, and temperature coefficient of +14 mV/°C - enabling stable reference generation in portable power rails and I/O clamp circuits.

For engineers reviewing the SZBZX84C16ET3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy at 5 mA, low dynamic impedance for regulation stability, ESD robustness (>16 kV HBM), thermal resistance (500 °C/W on FR-5), and automotive-grade AEC-Q101 qualification.

Technical Context

This device operates as a two-terminal voltage reference diode with cathode-anode polarity, requiring reverse-bias operation to achieve Zener breakdown. Its 16 V nominal regulation point falls in the positive temperature coefficient range (+14 mV/°C), minimizing drift across −65 °C to +150 °C junction temperature.

The SOT-23 package features a no-connect terminal (Pin 2), enabling mechanical stability without electrical function. Thermal performance is defined for FR-5 board (250 mW derated above 25 °C) and alumina substrate (300 mW), with maximum soldering temperature of 260 °C for 10 seconds.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	15.3–17.1 V at 5 mA - ensures ±5% regulation window for 16 V rail clamping and reference design
Zener Impedance (Z_ZT)	40 Ω max at 5 mA - maintains tight voltage regulation under varying load current
Power Dissipation	250 mW on FR-5 board - supports compact PCB layouts without forced cooling
Reverse Leakage (I_R)	50 nA max at 12.8 V - minimizes quiescent current in battery-powered sensing nodes
Temperature Coefficient	+14 mV/°C at 5 mA - enables predictable drift compensation in automotive ambient ranges
ESD Rating	Class 3 (>16 kV HBM) - protects against handling and system-level electrostatic discharge
Junction Temp Range	−65 °C to +150 °C - qualified for under-hood automotive and industrial control environments

Pinout & Package

SOT-23 (TO-236) surface-mount package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant finish; cathode identified by band; UL 94 V-0 flammability rating.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Connected to lower-potential node in reverse-bias configuration; carries forward current during fault conditions
2	No Connection	Mechanical support only; must remain unconnected in layout to avoid parasitic coupling or thermal stress
3	Cathode	Connected to regulated voltage node; serves as reference output and ESD current sink path

Key Features

Feature	Design Value
AEC-Q101 Qualified	Validated for automotive applications including engine control modules and body electronics
Pb-Free & RoHS Compliant	Meets global environmental compliance requirements for industrial and consumer end equipment
Peak Pulse Power	225 W (8 × 20 µs) - withstands transient surges per ISO 7637-2 without degradation
Low Capacitance	105 pF at 0 V - preserves signal integrity in high-frequency I/O protection paths
Automotive Marking Prefix	"SZ" prefix denotes unique site/control change tracking and PPAP capability for OEM supply chains

Applications

USB Port Protection	Automotive Sensor Reference
Use Scenario: Clamp 5 V USB data lines against ESD and load dump transients in portable docking stations. IC Role / Device Role / Timing Role: Two-terminal shunt regulator acting as low-leakage voltage clamp between D+ and ground. Use Value: 50 nA leakage at 12.8 V prevents signal distortion; 16 V breakdown avoids false triggering during normal 5 V operation.	Use Scenario: Provide stable 16 V reference for analog front-end conditioning in exhaust gas oxygen sensors. IC Role / Device Role / Timing Role: Precision Zener reference source feeding ADC bias networks in harsh-temperature engine compartments. Use Value: +14 mV/°C TC and −65 °C to +150 °C operation ensure <±1.2% drift across full automotive ambient range.
Portable Device Power Rail Clamp	Industrial PLC Input Protection
Use Scenario: Protect 12 V logic rails in handheld medical monitors from overvoltage during battery swap events. IC Role / Device Role / Timing Role: Shunt limiter placed across DC-DC output to absorb transient energy before downstream ICs. Use Value: 225 W peak pulse rating handles 12 V rail overshoots up to 20 µs duration without failure.	Use Scenario: Guard 24 V digital input channels in factory automation controllers against field-wiring faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated input stage, working with series resistor and optocoupler. Use Value: 40 Ω Z_ZT ensures <0.2 V regulation deviation at 10 mA surge current, preserving input logic thresholds.

USB Port Protection

Automotive Sensor Reference

Use Scenario: Clamp 5 V USB data lines against ESD and load dump transients in portable docking stations.

IC Role / Device Role / Timing Role: Two-terminal shunt regulator acting as low-leakage voltage clamp between D+ and ground.

Use Value: 50 nA leakage at 12.8 V prevents signal distortion; 16 V breakdown avoids false triggering during normal 5 V operation.

Use Scenario: Provide stable 16 V reference for analog front-end conditioning in exhaust gas oxygen sensors.

IC Role / Device Role / Timing Role: Precision Zener reference source feeding ADC bias networks in harsh-temperature engine compartments.

Use Value: +14 mV/°C TC and −65 °C to +150 °C operation ensure <±1.2% drift across full automotive ambient range.

Portable Device Power Rail Clamp

Industrial PLC Input Protection

Use Scenario: Protect 12 V logic rails in handheld medical monitors from overvoltage during battery swap events.

IC Role / Device Role / Timing Role: Shunt limiter placed across DC-DC output to absorb transient energy before downstream ICs.

Use Value: 225 W peak pulse rating handles 12 V rail overshoots up to 20 µs duration without failure.

Use Scenario: Guard 24 V digital input channels in factory automation controllers against field-wiring faults.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated input stage, working with series resistor and optocoupler.

Use Value: 40 Ω Z_ZT ensures <0.2 V regulation deviation at 10 mA surge current, preserving input logic thresholds.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84C16ET3G	Non-automotive grade; no AEC-Q101 qualification; same electrical specs and SOT-23 package	Targeted for commercial/industrial designs without automotive traceability requirements	Select when PPAP documentation, lot traceability, or extended temperature validation are not required
SZBZX84C15ET3G	15 V nominal Zener voltage (13.8–15.6 V range); identical package, thermal, and ESD specs	Suitable where 15 V regulation aligns with system margin or legacy reference design	Choose for tighter headroom in 16 V systems or compatibility with existing 15 V reference schematics

Compared with BZX84C16ET3G and SZBZX84C15ET3G, the SZBZX84C16ET3G uniquely combines AEC-Q101 qualification with 16 V regulation - making it the only option among the three for new automotive designs requiring certified reliability and controlled change management.

Availability

SZBZX84C16ET3G is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable power rail clamping, and industrial I/O protection requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.

Supply support for SZBZX84C16ET3G 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, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The SZBZX84CxxxET3G series belongs to onsemi's automotive-qualified Zener regulator product line, engineered specifically for robust voltage reference and transient suppression in safety-critical and high-reliability electronic control units.

FAQ

What is the Zener voltage tolerance of SZBZX84C16ET3G at 5 mA test current?

The SZBZX84C16ET3G has a Zener voltage range of 15.3 V to 17.1 V at 5 mA, corresponding to ±5% tolerance around the nominal 16.0 V rating. This specification is verified per onsemi's Electrical Characteristics table and applies under TA = 25 °C with pulse testing to minimize self-heating effects. The SZBZX84C16ET3G maintains this tolerance across its qualified operating temperature range when used within derated power limits.

Does SZBZX84C16ET3G have a functional Pin 2 connection?

No, Pin 2 of the SZBZX84C16ET3G is explicitly designated as "No Connection" per the official marking diagram and mechanical outline (Style 8). It serves only as a mechanical support terminal in the SOT-23 package and must remain unconnected in PCB layout to prevent unintended current paths or thermal stress. The active terminals are Pin 1 (Anode) and Pin 3 (Cathode).

Is SZBZX84C16ET3G suitable for automotive applications?

Yes, SZBZX84C16ET3G is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix indicating automotive-specific site and control change requirements. It meets stringent reliability, traceability, and temperature range (−65 °C to +150 °C) demands for engine control units, body electronics, and ADAS sensor modules. The SZBZX84C16ET3G is explicitly listed in onsemi's automotive-grade Zener portfolio.

What is the maximum reverse leakage current for SZBZX84C16ET3G?

The maximum reverse leakage current for SZBZX84C16ET3G is 50 nA at VR = 12.8 V and TA = 25 °C, as specified in the Electrical Characteristics table. This low leakage supports ultra-low-power applications such as battery-backed sensor nodes and standby-mode protection circuits. Leakage remains below 100 nA up to 150 °C junction temperature per typical characterization curves.

How does the temperature coefficient affect SZBZX84C16ET3G's regulation accuracy?

The SZBZX84C16ET3G exhibits a nominal temperature coefficient of +14 mV/°C at 5 mA, meaning its Zener voltage increases linearly with temperature. Over the full −65 °C to +150 °C range, this results in approximately ±1.2% total drift relative to 25 °C performance. This behavior is fully characterized and documented in Figure 1 of the datasheet, enabling accurate compensation in precision reference designs using the SZBZX84C16ET3G.

SZBZX84C16ET3G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3 (TO-236)

SZBZX84C16ET3G FAQ

1.How can I place an order for SZBZX84C16ET3G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZBZX84C16ET3G 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 SZBZX84C16ET3G reliable?

The price and inventory of SZBZX84C16ET3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C16ET3G is usually 5 days.

3.What payment methods are accepted for SZBZX84C16ET3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C16ET3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZBZX84C16ET3G?

SZBZX84C16ET3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZBZX84C16ET3G 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 SZBZX84C16ET3G?

For technical support, including SZBZX84C16ET3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C16ET3G requirements.

6.How does Aetrix verify that SZBZX84C16ET3G is sourced from the original manufacturer or authorized distributors?

All SZBZX84C16ET3G 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 SZBZX84C16ET3G meets industry standards.

7.What is the process for return or replacement of SZBZX84C16ET3G?

All SZBZX84C16ET3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C16ET3G, 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 SZBZX84C16ET3G part is unused and in its original packaging.

Return procedure for SZBZX84C16ET3G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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