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

onsemi BZX84C6V8LT3G

Name: BZX84C6V8LT3G
Brand: onsemi
SKU: BZX84C6V8LT3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84C6V8LT3G

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: BZX84C6V8LT3G.pdf

Description:: DIODE ZENER 6.8V 250MW SOT23-3

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Product details

Overview

BZX84C6V8LT3G from onsemi is a 6.8 V ±5% tolerance Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board at 25°C, with 15 Ω dynamic impedance at 5 mA test current and 2 µA reverse leakage at 5 V. It provides precision voltage regulation in space-constrained portable electronics.

For engineers reviewing the BZX84C6V8LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (6.8 V), tight thermal coefficient (+1.2 mV/°C), low capacitance (155 pF at 0 V), ESD robustness (>16 kV HBM), and SOT-23 compatibility with automated assembly.

Technical Context

This device operates as a two-terminal voltage reference, conducting in reverse breakdown to clamp voltage across its terminals. Its Zener mechanism delivers stable regulation with minimal temperature drift-+1.2 mV/°C at 6.8 V-and maintains low dynamic impedance (15 Ω @ 5 mA) for effective noise suppression in feedback paths.

The SOT-23 package features anode (Pin 1), no connection (Pin 2), and cathode (Pin 3), enabling unidirectional clamping in low-power bias networks. Its 250 mW rating on FR-5 board and 300 mW on alumina substrate support operation across industrial temperature range (−65°C to +150°C).

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage	6.8 V nominal, 6.4–7.2 V min–max at 5 mA - defines regulated output voltage in shunt regulator circuits
Power Dissipation	250 mW on FR-5 board at 25°C - sets maximum continuous power handling in standard PCB layouts
Zener Impedance	15 Ω at 5 mA - determines AC voltage variation under load transients; lower value improves regulation stability
Reverse Leakage	2 µA at 5 V - limits quiescent current in standby mode; critical for battery-powered systems
Capacitance	155 pF at 0 V, 1 MHz - affects high-frequency noise filtering capability and signal integrity in RF-adjacent circuits
Temperature Coefficient	+1.2 mV/°C at 5 mA - quantifies voltage drift per degree; enables accurate thermal compensation design
ESD Rating	Class 3 (>16 kV HBM) - ensures robustness against human-body electrostatic discharge during handling and assembly

Pinout & Package

SOT-23 (TO-236) surface-mount package, 2.90 × 1.30 × 1.00 mm, Pb-free, RoHS compliant, with cathode indicated by band. Pin 2 is internally unconnected and must remain floating.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Connected to lower-potential node; reverse-biased when cathode is held >6.8 V above anode
2	No Connection	Internally isolated; must not be soldered or tied to any net to avoid malfunction
3	Cathode	Connected to higher-potential node; establishes Zener breakdown path when forward voltage exceeds 6.8 V

Key Features

Feature	Design Value
Low-profile SOT-23 packaging	Enables high-density placement on compact PCBs such as smartphone mainboards and wearable sensor modules
250 mW power rating on FR-5	Supports reliable voltage clamping in 3.3 V and 5 V rail protection without heatsinking
Tight Zener voltage tolerance	±5% (6.4–7.2 V) ensures predictable regulation across production lots without calibration
High ESD immunity	Class 3 (>16 kV HBM) eliminates need for external ESD protection in handheld device front-end circuits
Low dynamic impedance	15 Ω at 5 mA minimizes output voltage ripple under varying load conditions in analog sensor biasing

Applications

Reference Voltage Source	Overvoltage Clamp
Use Scenario: Providing stable bias voltage for op-amp comparators and ADC reference inputs in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise 6.8 V reference point independent of supply variation. Use Value: Maintains <±1% accuracy over −40°C to +85°C due to +1.2 mV/°C TC and low 15 Ω Z_ZT, ensuring consistent analog measurement fidelity.	Use Scenario: Protecting microcontroller GPIO pins from transient surges in automotive body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element limiting input voltage to safe levels during load-dump events. Use Value: Responds within nanoseconds to clamp spikes up to 24 V while dissipating <250 mW, preventing latch-up in 3.3 V logic interfaces.
Power Rail Stabilizer	Signal Level Translator
Use Scenario: Stabilizing 5 V USB-powered peripheral rails in portable medical devices with variable source impedance. IC Role / Device Role / Timing Role: Passive shunt regulator absorbing excess current when upstream LDO output sags or overshoots. Use Value: Delivers 6.8 V reference with 2 µA leakage at 5 V, minimizing standby current drain while maintaining fast transient response.	Use Scenario: Translating 3.3 V logic signals to 5 V-compatible levels in mixed-voltage FPGA I/O banks. IC Role / Device Role / Timing Role: Threshold-setting component defining logic-high transition point in resistor-divider level-shifting networks. Use Value: Provides sharp 6.8 V knee voltage with 155 pF capacitance, preserving signal edge integrity up to 10 MHz without added propagation delay.

Reference Voltage Source

Overvoltage Clamp

Use Scenario: Providing stable bias voltage for op-amp comparators and ADC reference inputs in battery-powered IoT sensors.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise 6.8 V reference point independent of supply variation.

Use Value: Maintains <±1% accuracy over −40°C to +85°C due to +1.2 mV/°C TC and low 15 Ω Z_ZT, ensuring consistent analog measurement fidelity.

Use Scenario: Protecting microcontroller GPIO pins from transient surges in automotive body control modules.

IC Role / Device Role / Timing Role: Bidirectional clamping element limiting input voltage to safe levels during load-dump events.

Use Value: Responds within nanoseconds to clamp spikes up to 24 V while dissipating <250 mW, preventing latch-up in 3.3 V logic interfaces.

Power Rail Stabilizer

Signal Level Translator

Use Scenario: Stabilizing 5 V USB-powered peripheral rails in portable medical devices with variable source impedance.

IC Role / Device Role / Timing Role: Passive shunt regulator absorbing excess current when upstream LDO output sags or overshoots.

Use Value: Delivers 6.8 V reference with 2 µA leakage at 5 V, minimizing standby current drain while maintaining fast transient response.

Use Scenario: Translating 3.3 V logic signals to 5 V-compatible levels in mixed-voltage FPGA I/O banks.

IC Role / Device Role / Timing Role: Threshold-setting component defining logic-high transition point in resistor-divider level-shifting networks.

Use Value: Provides sharp 6.8 V knee voltage with 155 pF capacitance, preserving signal edge integrity up to 10 MHz without added propagation delay.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5234BLT1G	6.8 V nominal, ±5%, but 350 mW rating on FR-5 and 30 Ω Z_ZT @ 20 mA	Higher power handling suits higher-current bias networks; less suitable for ultra-low-leakage designs	Select when >250 mW dissipation is required and 30 Ω Z_ZT is acceptable for regulation stability
BZX84C6V8LT1G	Identical electrical specs but supplied in 3,000-piece tape-and-reel vs. 10,000-piece for BZX84C6V8LT3G	Same performance in circuit; differs only in packaging quantity and logistics footprint	Choose LT3G for high-volume production runs requiring fewer reel changes and lower handling cost per unit

Compared with MMBZ5234BLT1G, BZX84C6V8LT3G offers tighter thermal coefficient (+1.2 vs. +2.0 mV/°C) and lower capacitance (155 vs. 200 pF), making it preferable for precision analog and high-frequency signal conditioning; versus BZX84C6V8LT1G, the LT3G variant delivers identical electrical behavior with optimized supply-chain efficiency for mass manufacturing.

Availability

BZX84C6V8LT3G is available at Aetrix Electronics and suitable for cellular phones, handheld portables, and high-density PC boards requiring stable component supply and automated assembly compatibility.

Supply support for BZX84C6V8LT3G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The BZX84Cxxx series belongs to onsemi's precision Zener voltage regulator product line, designed specifically for space-constrained, low-power voltage reference and clamping applications in portable and high-density electronics.

FAQ

What is the Zener voltage tolerance of BZX84C6V8LT3G?

The BZX84C6V8LT3G has a nominal Zener voltage of 6.8 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 6.4 V and 7.2 V when tested at 5 mA. This tolerance is specified in the Electrical Characteristics table on page 3 of the onsemi datasheet and applies across the full operating temperature range.

Can BZX84C6V8LT3G replace BZX84C6V8LT1G in existing designs?

Yes, BZX84C6V8LT3G is electrically identical to BZX84C6V8LT1G-the only difference is packaging quantity (10,000 vs. 3,000 pieces per reel). Both share identical SOT-23 footprint, pinout (Anode-Pin1, NC-Pin2, Cathode-Pin3), and all electrical parameters including 6.8 V Zener voltage, 15 Ω impedance, and −65°C to +150°C operating range. No layout or schematic change is needed.

What is the maximum reverse leakage current for BZX84C6V8LT3G at 5 V?

The maximum reverse leakage current for BZX84C6V8LT3G at 5 V is 2 µA, as specified in the Electrical Characteristics table (page 3, row for BZX84C6V8LT1/T3G). This value is measured at TA = 25°C and defines the upper bound of off-state current in clamping or reference configurations where the device remains below breakdown.

Does BZX84C6V8LT3G support automotive applications?

The BZX84C6V8LT3G itself is not AEC-Q101 qualified; however, the SZBZX84C6V8LT3G variant (with SZ prefix) is automotive-grade, AEC-Q101 qualified, and PPAP capable. For non-automotive industrial or consumer use, BZX84C6V8LT3G meets RoHS, Pb-free, and Class 3 ESD requirements, but automotive deployment requires explicit validation of the SZ-prefixed part.

How does the temperature coefficient affect BZX84C6V8LT3G performance in wide-temperature environments?

The BZX84C6V8LT3G exhibits a positive temperature coefficient of +1.2 mV/°C at 5 mA, meaning its Zener voltage increases linearly with junction temperature. Over −40°C to +125°C, this results in a total shift of approximately ±200 mV-critical for precision references. Designers must account for this drift in applications like sensor excitation or ADC reference where absolute voltage accuracy is required.

BZX84C6V8LT3G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: BZX84CxxxLT1G

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 6.8 V

Tolerance:: ±6%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 4 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)

BZX84C6V8LT3G FAQ

1.How can I place an order for BZX84C6V8LT3G through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84C6V8LT3G 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 BZX84C6V8LT3G reliable?

The price and inventory of BZX84C6V8LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C6V8LT3G is usually 5 days.

3.What payment methods are accepted for BZX84C6V8LT3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C6V8LT3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84C6V8LT3G?

BZX84C6V8LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84C6V8LT3G 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 BZX84C6V8LT3G?

For technical support, including BZX84C6V8LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C6V8LT3G requirements.

6.How does Aetrix verify that BZX84C6V8LT3G is sourced from the original manufacturer or authorized distributors?

All BZX84C6V8LT3G 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 BZX84C6V8LT3G meets industry standards.

7.What is the process for return or replacement of BZX84C6V8LT3G?

All BZX84C6V8LT3G units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C6V8LT3G, 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 BZX84C6V8LT3G part is unused and in its original packaging.

Return procedure for BZX84C6V8LT3G:

1.Submit a request within 90 days.

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

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