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

onsemi SZBZX84C8V2ET3G

Name: SZBZX84C8V2ET3G
Brand: onsemi
SKU: SZBZX84C8V2ET3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZBZX84C8V2ET3G

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: SZBZX84C8V2ET3G.pdf

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

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Product details

Overview

SZBZX84C8V2ET3G from onsemi is a 250 mW, 8.2 V Zener diode in SOT-23 package, designed for precision voltage regulation and reference 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 −65 °C to +150 °C operating temperature range. It is used in overvoltage protection and low-power voltage reference circuits in portable electronics.

For engineers reviewing the SZBZX84C8V2ET3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy at 5 mA, low dynamic impedance, AEC-Q101 qualification for automotive use, ESD robustness (>16 kV HBM), and thermal performance on FR-5 board.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp or regulate voltage. Its Zener mechanism provides stable voltage output across a defined current range (1 mA to 20 mA), with temperature coefficient of +3.2 mV/°C at 5 mA - indicating positive drift with rising junction temperature.

The SOT-23 package features pin 1 (anode), pin 2 (no connection), and pin 3 (cathode), enabling unidirectional clamping. It supports peak pulse power of 225 W (8 × 20 µs) and exhibits 135 pF capacitance at 0 V bias and 1 MHz, making it suitable for low-frequency regulation rather than high-speed signal conditioning.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.7 V to 8.7 V at I_ZT = 5 mA - defines regulation band for stable reference under typical bias
Zener Impedance (Z_ZT)	≤15 Ω at I_ZT = 5 mA - ensures minimal output voltage variation with load current changes
Power Dissipation	250 mW on FR-5 board at T_A = 25 °C - sets maximum continuous DC power handling in standard PCB layout
Reverse Leakage Current	≤0.7 µA at V_R = 5.0 V - guarantees low standby current in undervoltage detection or bias networks
Temperature Coefficient	+3.2 mV/°C at I_ZT = 5 mA - quantifies voltage drift per degree, critical for temperature-stable references
Capacitance	135 pF at V_R = 0 V, f = 1 MHz - limits high-frequency noise coupling and affects transient response
ESD Rating	Class 3 (>16 kV) per HBM - enables direct handling and assembly without special ESD controls
Peak Pulse Power	225 W (8 × 20 µs) - supports transient surge suppression in low-energy protection circuits

Pinout & Package

SOT-23 (TO-236) surface-mount package: 2.90 mm × 1.30 mm × 1.00 mm body, void-free thermosetting plastic case, cathode indicated by polarity band, UL 94 V-0 flammability rating.

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 - no PCB trace or pad required
3	Cathode	Connected to higher-potential node; carries regulated output or clamped voltage

Key Features

Feature	Design Value
AEC-Q101 Qualified	Validated for automotive applications including engine control modules and infotainment power rails
Pb-Free & RoHS Compliant	Meets global environmental compliance requirements for industrial and consumer production
Optimized for Automated Assembly	Standard SOT-23 footprint and marking support high-yield pick-and-place and reflow processes
High ESD Robustness	Withstands >16 kV human-body-model discharge without parameter shift or failure
Stable Low-Current Regulation	Maintains 8.2 V reference down to 1 mA Zener current, enabling ultra-low-power biasing
Thermal Performance	500 °C/W junction-to-ambient resistance on FR-5 board enables predictable derating above 25 °C

Applications

Overvoltage Protection	Voltage Reference
Use Scenario: Clamping transient spikes on 5 V or 9 V supply rails in handheld medical devices. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing excess energy during ESD or load-dump events. Use Value: Limits rail voltage to ≤8.7 V with <0.7 µA leakage below 5 V, preserving downstream logic integrity.	Use Scenario: Providing stable bias voltage for op-amp comparators in battery-powered sensor nodes. IC Role / Device Role / Timing Role: Precision DC reference source with minimal quiescent current draw. Use Value: Delivers 8.2 V ±0.5 V at 1–5 mA with +3.2 mV/°C TC, enabling <1% total error over −40 °C to +85 °C.
Power Supply Monitoring	Signal Level Translation
Use Scenario: Detecting brownout conditions on microcontroller V_CC lines in automotive body control units. IC Role / Device Role / Timing Role: Reverse-biased threshold detector feeding comparator input. Use Value: Activates fault flag when V_CC drops below 7.7 V, with <15 Ω dynamic impedance ensuring sharp transition.	Use Scenario: Shifting logic levels between 3.3 V and 5 V domains in USB peripheral interface circuits. IC Role / Device Role / Timing Role: Clamp diode establishing fixed offset between signal rails. Use Value: Maintains 8.2 V differential headroom with 135 pF capacitance, avoiding signal distortion up to 100 kHz.

Overvoltage Protection

Voltage Reference

Use Scenario: Clamping transient spikes on 5 V or 9 V supply rails in handheld medical devices.

IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing excess energy during ESD or load-dump events.

Use Value: Limits rail voltage to ≤8.7 V with <0.7 µA leakage below 5 V, preserving downstream logic integrity.

Use Scenario: Providing stable bias voltage for op-amp comparators in battery-powered sensor nodes.

IC Role / Device Role / Timing Role: Precision DC reference source with minimal quiescent current draw.

Use Value: Delivers 8.2 V ±0.5 V at 1–5 mA with +3.2 mV/°C TC, enabling <1% total error over −40 °C to +85 °C.

Power Supply Monitoring

Signal Level Translation

Use Scenario: Detecting brownout conditions on microcontroller V_CC lines in automotive body control units.

IC Role / Device Role / Timing Role: Reverse-biased threshold detector feeding comparator input.

Use Value: Activates fault flag when V_CC drops below 7.7 V, with <15 Ω dynamic impedance ensuring sharp transition.

Use Scenario: Shifting logic levels between 3.3 V and 5 V domains in USB peripheral interface circuits.

IC Role / Device Role / Timing Role: Clamp diode establishing fixed offset between signal rails.

Use Value: Maintains 8.2 V differential headroom with 135 pF capacitance, avoiding signal distortion up to 100 kHz.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84C8V2LT3G	Same Zener voltage (7.7–8.7 V), identical SOT-23 package, but lacks AEC-Q101 qualification and automotive PPAP capability	Not suitable for automotive Tier-1 production; acceptable for industrial or consumer designs where qualification is not mandated	Select only if automotive compliance is unnecessary and cost sensitivity outweighs long-term supply assurance
MMSZ4689T1G	8.2 V nominal Zener, 500 mW rating, same SOT-23 footprint, but higher power dissipation and 30 Ω Z_ZT at 5 mA	Better thermal margin for sustained regulation; higher impedance reduces regulation precision in low-current references	Prefer when board-level power density allows larger thermal relief or when higher pulse energy handling is required

Compared with SZBZX84C8V2ET3G, BZX84C8V2LT3G omits automotive qualification but matches electrical specs, while MMSZ4689T1G trades tighter regulation for higher power capacity - making SZBZX84C8V2ET3G optimal for AEC-Q101-compliant, space-constrained, precision-bias applications.

Availability

SZBZX84C8V2ET3G is available at Aetrix Electronics and suitable for automotive ECUs, portable medical monitors, and high-density PC boards requiring stable component supply and full AEC-Q101 traceability.

Supply support for SZBZX84C8V2ET3G 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, medical, and IoT applications.

SZBZX84C8V2ET3G belongs to the BZX84CxxxETxG family of Zener regulators, engineered specifically for compact, reliable voltage clamping and referencing in automotive and high-reliability portable systems.

FAQ

What is the Zener voltage tolerance of SZBZX84C8V2ET3G at 5 mA test current?

The SZBZX84C8V2ET3G has a Zener voltage range of 7.7 V to 8.7 V at I_ZT = 5 mA, corresponding to a nominal 8.2 V with ±0.5 V absolute tolerance. This specification is verified per onsemi's August 2024 datasheet revision 11 and applies under TA = 25 °C with pulse testing to minimize self-heating. The SZBZX84C8V2ET3G maintains this tolerance across its qualified operating temperature range when properly derated.

Is SZBZX84C8V2ET3G pin-compatible with standard SOT-23 Zener diodes?

Yes, SZBZX84C8V2ET3G uses the standard SOT-23 (TO-236) package with pin 1 = anode, pin 2 = no connection, and pin 3 = cathode - matching industry-standard SOT-23 Zener footprints including BZX84C8V2LT3G and MMSZ4689T1G. Mechanical compatibility is confirmed by onsemi's CASE 318 outline drawing, and no PCB layout change is needed when substituting within the same package variant.

Does SZBZX84C8V2ET3G support automotive-grade reliability requirements?

Yes, SZBZX84C8V2ET3G is AEC-Q101 qualified and PPAP capable, with manufacturing site and process controls specific to automotive applications. The "SZ" prefix denotes compliance with automotive change control requirements, and the device meets extended temperature operation (−65 °C to +150 °C), ESD robustness (>16 kV HBM), and lifetime reliability standards required for under-hood and cabin electronics. This makes SZBZX84C8V2ET3G suitable for deployment in automotive ECUs and ADAS subsystems.

What is the maximum continuous power dissipation for SZBZX84C8V2ET3G on FR-5 board?

SZBZX84C8V2ET3G is rated for 250 mW total power dissipation on FR-5 board at ambient temperature (T_A) of 25 °C, with linear derating of 2.0 mW/°C above that temperature. This corresponds to a junction-to-ambient thermal resistance (R_JA) of 500 °C/W. The SZBZX84C8V2ET3G must be operated within this limit to avoid exceeding its maximum junction temperature of +150 °C, especially in enclosed or high-ambient environments.

Can SZBZX84C8V2ET3G be used for low-current voltage reference applications?

Yes, SZBZX84C8V2ET3G is characterized down to 1 mA Zener current (V_Z = 7.6 V to 8.7 V), supporting low-power reference designs. Its 15 Ω dynamic impedance at 5 mA and 80 Ω at 1 mA ensure stable regulation even in micropower circuits such as battery-monitoring comparators or sleep-mode bias networks. The SZBZX84C8V2ET3G's +3.2 mV/°C temperature coefficient also enables predictable compensation in temperature-critical references.

SZBZX84C8V2ET3G 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)

SZBZX84C8V2ET3G FAQ

1.How can I place an order for SZBZX84C8V2ET3G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZBZX84C8V2ET3G 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 SZBZX84C8V2ET3G reliable?

The price and inventory of SZBZX84C8V2ET3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C8V2ET3G is usually 5 days.

3.What payment methods are accepted for SZBZX84C8V2ET3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C8V2ET3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZBZX84C8V2ET3G?

SZBZX84C8V2ET3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZBZX84C8V2ET3G 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 SZBZX84C8V2ET3G?

For technical support, including SZBZX84C8V2ET3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C8V2ET3G requirements.

6.How does Aetrix verify that SZBZX84C8V2ET3G is sourced from the original manufacturer or authorized distributors?

All SZBZX84C8V2ET3G 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 SZBZX84C8V2ET3G meets industry standards.

7.What is the process for return or replacement of SZBZX84C8V2ET3G?

All SZBZX84C8V2ET3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C8V2ET3G, 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 SZBZX84C8V2ET3G part is unused and in its original packaging.

Return procedure for SZBZX84C8V2ET3G:

1.Submit a request within 90 days.

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

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