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

Diodes Incorporated BZX84B3V0Q-7-F

Name: BZX84B3V0Q-7-F
Brand: Diodes Incorporated
SKU: BZX84B3V0Q-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84B3V0Q-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

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

Datasheet:: BZX84B3V0Q-7-F.pdf

Description:: DIODE ZENER 3V 300MW SOT23

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Inventory:6,410

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Product details

Overview

BZX84B3V0Q-7-F from Diodes Incorporated is an AEC-Q101-qualified, ±2% tolerance precision Zener diode in SOT23 package, rated for 350mW power dissipation at 3.0V nominal Zener voltage (2.94–3.06V range), 5mA test current, and 95Ω dynamic impedance at 1kHz - used for voltage regulation and reference in automotive power supply monitoring circuits.

For engineers reviewing the BZX84B3V0Q-7-F datasheet, BZX84B3V0Q-7-F pinout, BZX84B3V0Q-7-F application, or BZX84B3V0Q-7-F equivalent, key selection factors include its automotive qualification, tight 2% V_Z tolerance, low 95Ω Zener impedance at I_ZT, -3.5mV/°C temperature coefficient, and SOT23 footprint compatibility with high-volume automated assembly.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across load variations and temperature shifts. Its 3.0V nominal Zener voltage is specified at 5mA test current, with 95Ω dynamic impedance (Z_ZT) and 600Ω knee impedance (Z_ZK) at 1mA, ensuring predictable regulation under light and moderate loads.

The device features a negative temperature coefficient of -3.5mV/°C near 3V, enabling predictable drift compensation in reference designs. It is qualified to AEC-Q101 standards, with 350mW power rating under ambient-temperature terminal conditions and 300mW derated rating on FR-4 PCB per JEDEC layout guidelines.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.0V nominal, 2.94–3.06V range at 5mA - ensures precise 3V reference with minimal binning spread.
Tolerance	±2% - enables tighter system-level voltage margin control without external trimming.
Power Dissipation	350mW (ambient-terminal condition) - supports robust operation in compact automotive modules.
Zener Impedance	95Ω at 1kHz, 5mA - delivers low AC ripple rejection in feedback and sensing paths.
Reverse Leakage	10µA max at 1.0V - minimizes standby current in always-on monitoring circuits.
Temp. Coefficient	-3.5mV/°C - allows predictable drift modeling for temperature-compensated references.
Package	SOT23 - surface-mount footprint compatible with standard pick-and-place and reflow processes.

Pinout & Package

Package: SOT23 - three-terminal plastic-molded case with matte tin-plated Alloy 42 leadframe; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.008g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Forward conduction terminal / cathode reference ground	Connected to circuit ground when used as shunt regulator; defines polarity for correct biasing.
Cathode (Pin 2)	Zener breakdown terminal / regulated output node	Connected to input rail via series resistor; maintains stable 3.0V relative to anode during reverse bias.
No-Connect (Pin 3)	Internal die attach pad / mechanical support	Not electrically connected; serves thermal and mechanical anchoring function in SOT23 structure.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive under-hood applications including engine control and body electronics.
±2% Zener voltage tolerance	Reduces need for post-assembly calibration in voltage-sense and overvoltage protection circuits.
350mW power rating	Enables direct use in 3.3V/5V rail monitoring without external heat sinking or derating penalties.
Lead-free, halogen-free, RoHS 3 compliant	Meets global environmental compliance requirements for Tier 1 automotive and industrial OEMs.
SOT23 packaging	Supports high-speed automated placement and reflow soldering with industry-standard land patterns.

Applications

Automotive Battery Monitoring

Industrial Sensor Reference

Use Scenario: Monitoring 12V battery voltage in vehicle infotainment head units to detect undervoltage conditions.

IC Role / Device Role / Timing Role: Shunt Zener reference providing stable 3.0V threshold for ADC input scaling.

Use Value: Enables accurate 12V measurement using 3.3V microcontroller ADC with ±2% full-scale error budget.

Use Scenario: Providing excitation voltage for resistive bridge sensors in factory automation pressure transmitters.

IC Role / Device Role / Timing Role: Precision voltage reference for Wheatstone bridge biasing in analog front-end circuits.

Use Value: Delivers stable 3.0V with <95Ω impedance to minimize sensor nonlinearity induced by source impedance mismatch.

USB-C Power Negotiation

Smart Meter Voltage Supervision

Use Scenario: Regulating auxiliary 3.0V rail for USB-C PD controller logic in portable chargers.

IC Role / Device Role / Timing Role: Low-power Zener clamp maintaining clean logic supply during transient load switching.

Use Value: Maintains 3.0V within ±60mV over temperature (-40°C to +125°C) due to controlled -3.5mV/°C TC.

Use Scenario: Detecting brownout events on 3.3V MCU supply in electricity metering ICs.

IC Role / Device Role / Timing Role: Overvoltage/undervoltage detection element in supervisor circuitry.

Use Value: Provides fast, repeatable 3.0V trip point with 10µA leakage - minimizing false triggers in long-life utility deployments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ4684T1G	3.0V nominal, ±5% tolerance, 500mW rating, SOD-123 package	Higher power but looser tolerance; larger footprint requires board redesign	Preferred where higher surge energy handling is needed and 5% V_Z margin is acceptable
BZX84-C3V0-7-F	3.0V nominal, ±5% tolerance, same SOT23 package, non-automotive grade	Lacks AEC-Q101 qualification and tighter 2% tolerance	Cost-effective option for non-automotive consumer applications with relaxed reliability requirements

Compared with MMSZ4684T1G and BZX84-C3V0-7-F, BZX84B3V0Q-7-F uniquely combines automotive qualification, ±2% V_Z tolerance, and SOT23 compatibility - making it optimal for space-constrained, safety-critical voltage reference roles where precision and reliability are jointly required.

Availability

BZX84B3V0Q-7-F is available at Aetrix Electronics and suitable for automotive battery monitoring, industrial sensor reference, USB-C power negotiation, and smart meter voltage supervision requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZX84B3V0Q-7-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.

The BZX84B series belongs to Diodes' precision Zener diode product line, engineered specifically for automotive-grade voltage regulation and reference applications demanding tight tolerance, AEC-Q101 qualification, and robust thermal performance.

FAQ

What is the maximum reverse current specification for BZX84B3V0Q-7-F at 1.0V?

The maximum reverse current (I_R) is 10µA at V_R = 1.0V, measured at T_A = +25°C. This low leakage ensures minimal parasitic loading in high-impedance reference and sensing nodes, supporting accurate measurements in battery-powered and low-power systems.

How does the -3.5mV/°C temperature coefficient affect circuit design?

The negative temperature coefficient means the Zener voltage decreases by 3.5mV per °C rise in junction temperature. Designers must account for this drift in precision references - for example, by pairing with positive-TC components or applying software compensation in microcontroller-based systems operating across -40°C to +125°C.

Is BZX84B3V0Q-7-F compatible with lead-free reflow profiles?

Yes - it uses matte tin-plated terminals qualified to MIL-STD-202 Method 208 and supports standard lead-free reflow profiles (peak 260°C). The SOT23 package meets IPC/JEDEC J-STD-020 moisture sensitivity level 1, eliminating bake requirements prior to assembly.

What is the difference between BZX84B3V0Q-7-F and BZX84B3V0-7-F?

BZX84B3V0Q-7-F is the automotive-qualified version (AEC-Q101), while BZX84B3V0-7-F is the commercial-grade variant. Both share identical electrical specs and SOT23 packaging, but only the "Q" suffix denotes full automotive qualification, including extended temperature testing, failure analysis, and process controls mandated for automotive applications.

BZX84B3V0Q-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 3 V

Tolerance:: ±2%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 95 Ohms

Current - Reverse Leakage @ Vr:: 10 µA @ 1 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

BZX84B3V0Q-7-F FAQ

1.How can I place an order for BZX84B3V0Q-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84B3V0Q-7-F 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 BZX84B3V0Q-7-F reliable?

The price and inventory of BZX84B3V0Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84B3V0Q-7-F is usually 5 days.

3.What payment methods are accepted for BZX84B3V0Q-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84B3V0Q-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84B3V0Q-7-F?

BZX84B3V0Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84B3V0Q-7-F 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 BZX84B3V0Q-7-F?

For technical support, including BZX84B3V0Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84B3V0Q-7-F requirements.

6.How does Aetrix verify that BZX84B3V0Q-7-F is sourced from the original manufacturer or authorized distributors?

All BZX84B3V0Q-7-F 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 BZX84B3V0Q-7-F meets industry standards.

7.What is the process for return or replacement of BZX84B3V0Q-7-F?

All BZX84B3V0Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84B3V0Q-7-F, 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 BZX84B3V0Q-7-F part is unused and in its original packaging.

Return procedure for BZX84B3V0Q-7-F:

1.Submit a request within 90 days.

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

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