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

onsemi SZBZX84C8V2ET1G

Name: SZBZX84C8V2ET1G
Brand: onsemi
SKU: SZBZX84C8V2ET1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZBZX84C8V2ET1G

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: SZBZX84C8V2ET1G.pdf

Description:: DIODE ZENER 8.2V 225MW SOT23-3

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Product details

Overview

SZBZX84C8V2ET1G from onsemi is a 250 mW, 8.2 V Zener voltage regulator diode in SOT-23 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 8.2 V at 5 mA test current, with dynamic impedance ≤15 Ω, ±0.7 V tolerance, and 3.2 mV/°C temperature coefficient - ideal for biasing, power supply feedback, and ESD-sensitive analog front-ends.

For engineers reviewing the SZBZX84C8V2ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy at low test currents (1 mA to 20 mA), thermal stability across −65°C to +150°C, low leakage (<0.7 µA at 6.6 V), and compatibility with automated SMT assembly on FR-5 or alumina substrates.

Technical Context

This device operates as a two-terminal, reverse-biased silicon Zener diode with sharp breakdown knee and stable regulation under DC and pulsed conditions. Its 250 mW power rating applies to FR-5 board at 25°C, derating linearly above that temperature with R_JA = 500 °C/W.

The SOT-23 package features cathode-indicated polarity band, Pb-free RoHS-compliant finish, UL 94 V-0 flammability rating, and 260°C soldering tolerance for 10 seconds. Pin 2 is internally unconnected - confirmed by mechanical outline Style 8 and electrical characterization tables.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.7–8.7 V at I_ZT = 5 mA - ensures stable reference within ±0.5 V tolerance for feedback loops and voltage clamping.
Zener Impedance (Z_ZT)	≤15 Ω at I_ZT = 5 mA - minimizes output voltage variation under load transients in regulation circuits.
Reverse Leakage (I_R)	≤0.7 µA at V_R = 6.6 V - preserves low quiescent current in battery-powered sensor bias networks.
Power Dissipation	250 mW on FR-5 board at 25°C - supports compact PCB layouts without forced cooling in portable electronics.
Temperature Coefficient	+3.2 mV/°C at I_ZT = 5 mA - enables predictable drift compensation in automotive ambient ranges (−40°C to +125°C).
ESD Rating	Class 3 (>16 kV HBM) - protects downstream circuitry during handling and system-level ESD events.
Capacitance	135 pF at V_R = 0 V, f = 1 MHz - limits high-frequency noise coupling in RF-adjacent power rails.

Pinout & Package

SOT-23 (TO-236) surface-mount package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant solderable finish and cathode polarity band.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Connected to lower-potential node in reverse-bias configuration; must be held ≤ V_Z below cathode for regulation.
2	No Connection	Internally unconnected - no PCB trace or pad required; avoids unintended parasitic paths or solder bridging.
3	Cathode	Connected to regulated voltage rail; polarity band on package identifies this terminal for correct orientation.

Key Features

Feature	Design Value
AEC-Q101 Qualified	Validated for automotive applications including engine control modules and body electronics requiring PPAP documentation.
Pb-Free & RoHS Compliant	Meets global environmental compliance mandates without sacrificing thermal or electrical performance.
Peak Pulse Power	225 W (8 × 20 µs waveform) - withstands transient surges in industrial I/O protection circuits.
Small-Signal Regulation	Stable operation down to I_Z = 0.1 mA - supports ultra-low-power IoT sensor references.
High-Density Assembly Ready	Package optimized for pick-and-place accuracy and reflow yield on fine-pitch PC boards.

Applications

Portable Power Management	Automotive Sensor Biasing
Use Scenario: Regulating reference voltage for ADCs and comparators in handheld medical devices and wearables. IC Role / Device Role / Timing Role: Zener diode providing stable 8.2 V reference to analog signal chain components. Use Value: Maintains <±0.5% reference accuracy across temperature and battery discharge, enabling consistent measurement resolution.	Use Scenario: Biasing NTC thermistors and Hall-effect sensors in engine coolant and cabin air temperature modules. IC Role / Device Role / Timing Role: Precision voltage clamp establishing known operating point for sensor excitation. Use Value: Ensures sensor output linearity remains within AEC-Q200 Class 2 tolerance bands despite 12 V rail fluctuations.
Industrial PLC Input Protection	Consumer Audio Signal Clamping
Use Scenario: Overvoltage protection on 24 V digital input channels exposed to inductive switching transients. IC Role / Device Role / Timing Role: Fast-response shunt regulator diverting surge energy before it reaches MCU GPIO. Use Value: Limits clamped voltage to ≤9.6 V (V_Z(max) + margin), preventing latch-up in 3.3 V logic interfaces.	Use Scenario: DC offset suppression and peak limiting in headphone amplifier output stages. IC Role / Device Role / Timing Role: Low-capacitance (135 pF) Zener clamping asymmetric signal excursions. Use Value: Prevents speaker damage from accidental DC bias while introducing <0.01% THD at 1 kHz due to minimal junction capacitance.

Portable Power Management

Automotive Sensor Biasing

Use Scenario: Regulating reference voltage for ADCs and comparators in handheld medical devices and wearables.

IC Role / Device Role / Timing Role: Zener diode providing stable 8.2 V reference to analog signal chain components.

Use Value: Maintains <±0.5% reference accuracy across temperature and battery discharge, enabling consistent measurement resolution.

Use Scenario: Biasing NTC thermistors and Hall-effect sensors in engine coolant and cabin air temperature modules.

IC Role / Device Role / Timing Role: Precision voltage clamp establishing known operating point for sensor excitation.

Use Value: Ensures sensor output linearity remains within AEC-Q200 Class 2 tolerance bands despite 12 V rail fluctuations.

Industrial PLC Input Protection

Consumer Audio Signal Clamping

Use Scenario: Overvoltage protection on 24 V digital input channels exposed to inductive switching transients.

IC Role / Device Role / Timing Role: Fast-response shunt regulator diverting surge energy before it reaches MCU GPIO.

Use Value: Limits clamped voltage to ≤9.6 V (V_Z(max) + margin), preventing latch-up in 3.3 V logic interfaces.

Use Scenario: DC offset suppression and peak limiting in headphone amplifier output stages.

IC Role / Device Role / Timing Role: Low-capacitance (135 pF) Zener clamping asymmetric signal excursions.

Use Value: Prevents speaker damage from accidental DC bias while introducing <0.01% THD at 1 kHz due to minimal junction capacitance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84C8V2ET1G	Same Zener voltage range (7.7–8.7 V), identical SOT-23 package, but lacks AEC-Q101 qualification and automotive PPAP support.	Approved only for commercial-grade consumer and industrial equipment - not suitable for automotive OEM designs.	Select when cost sensitivity outweighs automotive compliance requirements and lifecycle assurance.
MMSZ4687T1G	8.2 V nominal Zener, 500 mW rating, same SOT-23 footprint, but higher Z_ZT (35 Ω @ 5 mA) and wider V_Z tolerance (±5%).	Better suited for non-critical voltage clamping where tighter regulation is unnecessary and higher power margin is needed.	Choose when higher pulse energy absorption is prioritized over regulation precision in surge-prone environments.

Compared with SZBZX84C8V2ET1G, BZX84C8V2ET1G offers identical electrical behavior but no automotive qualification, while MMSZ4687T1G trades regulation tightness for greater surge robustness - making SZBZX84C8V2ET1G optimal for AEC-Q101-requiring systems needing both precision and reliability.

Availability

SZBZX84C8V2ET1G is available at Aetrix Electronics and suitable for portable power management, automotive sensor biasing, industrial PLC input protection, and consumer audio signal clamping requiring stable component supply across extended production lifecycles.

Supply support for SZBZX84C8V2ET1G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and IoT applications.

SZBZX84C8V2ET1G belongs to the BZX84CxxxET1G/SZBZX84CxxxET1G family - engineered specifically for high-density, surface-mount voltage regulation in space- and power-constrained systems where reliability under thermal and ESD stress is critical.

FAQ

What is the maximum Zener voltage tolerance for SZBZX84C8V2ET1G at 5 mA test current?

The SZBZX84C8V2ET1G has a specified Zener voltage range of 7.7 V to 8.7 V at I_ZT = 5 mA, corresponding to a ±0.5 V absolute tolerance or ±6.1% relative tolerance around the nominal 8.2 V value. This tolerance is verified per onsemi's Electrical Characteristics table on page 2 of the August 2024 Rev. 11 datasheet and applies under standard test conditions (T_A = 25°C).

Does SZBZX84C8V2ET1G support automotive-grade reliability requirements?

Yes, SZBZX84C8V2ET1G is explicitly AEC-Q101 qualified and PPAP capable, as stated in the "Specification Features" section of the datasheet. The "SZ" prefix denotes automotive and other applications requiring unique site and control change requirements - confirming its suitability for under-hood and chassis-mounted electronics where extended temperature operation and process traceability are mandated.

What is the role of Pin 2 in the SZBZX84C8V2ET1G SOT-23 package?

Pin 2 of the SZBZX84C8V2ET1G is a no-connection (NC) terminal, as defined in the Mechanical Characteristics section and confirmed by Style 8 pinout in the Package Dimensions document. It is internally unconnected and must remain floating on the PCB - no trace, pad, or solder joint should be attached to avoid mechanical stress or unintended parasitic coupling.

How does the temperature coefficient of SZBZX84C8V2ET1G affect its regulation stability?

The SZBZX84C8V2ET1G exhibits a nominal temperature coefficient of +3.2 mV/°C at I_ZT = 5 mA, meaning its Zener voltage increases by approximately 3.2 mV per degree Celsius rise in junction temperature. This positive coefficient allows predictable compensation in circuits where ambient temperature varies between −65°C and +150°C, and is documented in the Electrical Characteristics table on page 2 of the datasheet.

Can SZBZX84C8V2ET1G be used in low-current biasing applications below 1 mA?

Yes, SZBZX84C8V2ET1G maintains regulation down to I_Z = 0.1 mA, with V_Z = 7.6–8.7 V specified at that current level. Its low leakage (<0.7 µA at 6.6 V) and stable dynamic impedance make it suitable for ultra-low-power sensor biasing and reference generation in battery-operated IoT nodes - confirmed in the second Electrical Characteristics table on page 3 of the datasheet.

SZBZX84C8V2ET1G 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):: 8.2 V

Tolerance:: ±5%

Power - Max:: 225 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 700 nA @ 5 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)

SZBZX84C8V2ET1G FAQ

1.How can I place an order for SZBZX84C8V2ET1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZBZX84C8V2ET1G 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 SZBZX84C8V2ET1G reliable?

The price and inventory of SZBZX84C8V2ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C8V2ET1G is usually 5 days.

3.What payment methods are accepted for SZBZX84C8V2ET1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C8V2ET1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZBZX84C8V2ET1G?

SZBZX84C8V2ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZBZX84C8V2ET1G 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 SZBZX84C8V2ET1G?

For technical support, including SZBZX84C8V2ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C8V2ET1G requirements.

6.How does Aetrix verify that SZBZX84C8V2ET1G is sourced from the original manufacturer or authorized distributors?

All SZBZX84C8V2ET1G 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 SZBZX84C8V2ET1G meets industry standards.

7.What is the process for return or replacement of SZBZX84C8V2ET1G?

All SZBZX84C8V2ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C8V2ET1G, 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 SZBZX84C8V2ET1G part is unused and in its original packaging.

Return procedure for SZBZX84C8V2ET1G:

1.Submit a request within 90 days.

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

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