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

Diodes Incorporated BZX84C3V3-7-F

Name: BZX84C3V3-7-F
Brand: Diodes Incorporated
SKU: BZX84C3V3-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84C3V3-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

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

Datasheet:: BZX84C3V3-7-F.pdf

Description:: DIODE ZENER 3.3V 300MW SOT23-3

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Product details

Overview

BZX84C3V3-7-F from Diodes Incorporated is a 3.3 V, 5 mA nominal Zener diode in SOT23 package, rated for 350 mW power dissipation at ambient temperature, with 95 Ω maximum Zener impedance at test current and ±0.5 V voltage tolerance, used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.

For engineers reviewing the BZX84C3V3-7-F datasheet, BZX84C3V3-7-F pinout, BZX84C3V3-7-F application, or BZX84C3V3-7-F equivalent, key selection criteria include Zener voltage accuracy at 5 mA, thermal resistance (357 °C/W), reverse leakage (<5.0 µA at 1.0 V), temperature coefficient (–3.5 mV/°C), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable 3.3 V regulation across load and supply variations. Its planar die construction ensures consistent voltage tolerance and low dynamic impedance (95 Ω @ 1 kHz), while the SOT23 package enables high-density PCB layouts and compatibility with automated reflow assembly.

It exhibits a negative temperature coefficient of –3.5 mV/°C, enabling predictable drift compensation in temperature-sensitive references. With 350 mW absolute maximum power rating under ambient cooling conditions and 0.008 g mass, it supports compact, thermally constrained designs without forced airflow.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.3 V nominal, 3.1–3.5 V range at 5 mA - defines stable reference point for biasing or clamping circuits
Power Dissipation (P_D)	350 mW at T_A = 25°C - sets maximum continuous power handling without heatsinking
Zener Impedance (Z_ZT)	95 Ω max @ 1 kHz, 5 mA - determines regulation stiffness under dynamic load transients
Reverse Leakage (I_R)	≤5.0 µA @ V_R = 1.0 V - ensures minimal quiescent current in standby voltage monitoring
Temperature Coefficient	–3.5 mV/°C - quantifies voltage drift per degree, critical for temperature-compensated references
Package	SOT23 - surface-mount, 3-terminal, RoHS-compliant plastic case with 0.008 g mass and UL 94V-0 rating
AEC-Q101 Qualified	Yes - validated for automotive applications requiring high-reliability stress testing (HTOL, TC, HAST)

Pinout & Package

Package: SOT23 - three-terminal surface-mount plastic package with matte tin-plated alloy 42 leadframe, moisture sensitivity level 1, and top-view polarity marking (cathode band on terminal 3).

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	Forward conduction path / Zener cathode reference ground	Connected to circuit ground or low-impedance return when used as shunt regulator
2 (Cathode)	Zener breakdown node / voltage reference output	Provides regulated 3.3 V output relative to pin 1; connects to input rail via series resistor
3 (Anode)	Internal die anode connection / mechanical tie	Electrically tied to pin 1 internally; serves as second anode contact for thermal and mechanical stability

Key Features

Feature	Design Value
Planar die construction	Ensures tight Zener voltage distribution (±0.2 V) and repeatable impedance across production lots
350 mW power rating at ambient	Enables direct use in 3.3 V rail protection without derating below 70°C ambient
AEC-Q101 qualification	Validates suitability for automotive body control modules and infotainment power rails
Halogen- and antimony-free "Green" compound	Meets IEC 61249-2-21 requirements with <900 ppm Br/Cl and <1000 ppm Sb
Moisture sensitivity Level 1	Eliminates bake requirement prior to reflow, reducing manufacturing overhead

Applications

Industrial Sensor Signal Conditioning

Automotive Cabin Control Module

Use Scenario: Stabilizing bias voltage for 3.3 V ADC reference inputs in temperature/humidity sensors.

IC Role / Device Role / Timing Role: Shunt voltage reference providing low-drift 3.3 V node independent of supply ripple.

Use Value: Maintains ±0.5% reference accuracy over –40°C to +125°C due to matched temperature coefficient and low Z_ZT.

Use Scenario: Overvoltage clamp on LIN bus transceiver V_CC rail during load dump events.

IC Role / Device Role / Timing Role: Transient voltage suppressor limiting rail excursion to ≤3.5 V during 40 V/100 ms pulses.

Use Value: Prevents transceiver latch-up by clamping within 100 ns, leveraging 5 mA test current stability and 350 mW surge capability.

USB-C Power Delivery Monitor

Medical Wearable Battery Gauge

Use Scenario: Reference voltage source for voltage divider feedback in USB PD sink CC-line detection circuitry.

IC Role / Device Role / Timing Role: Precision 3.3 V threshold generator for comparator-based CC logic state interpretation.

Use Value: Enables accurate 0.2 V margin detection between USB PD 3.3 V and 5 V states using ±0.2 V tolerance and <5 µA leakage.

Use Scenario: Low-current voltage reference for fuel gauge IC in coin-cell-powered ECG patch.

IC Role / Device Role / Timing Role: Stable bias node for battery voltage scaling amplifier with sub-µA quiescent draw.

Use Value: Extends battery life by contributing only 0.5 µA typical reverse leakage at 1.0 V, verified per AEC-Q101 HTOL stress.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5226BS-7-F	Zener voltage 3.3 V, but 200 mW rating and 120 Ω Z_ZT; no AEC-Q101 qualification	Limited to commercial-grade portable electronics; unsuitable for automotive underhood environments	Select when cost is primary constraint and temperature range is limited to 0–70°C
BZX84-C3V3,115	Same electrical specs, but packaged in 10,000-piece tape-and-reel (–13-F suffix); identical SOT23 footprint and marking	No functional difference - only packaging variant for high-volume production lines	Select for large-batch SMT line optimization where reel size impacts changeover frequency

Compared with MMBZ5226BS-7-F, BZX84C3V3-7-F delivers higher power headroom and automotive qualification; compared with BZX84-C3V3,115, it offers identical performance in smaller 3,000-piece reels for prototyping and mid-volume builds.

Availability

BZX84C3V3-7-F is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive cabin control modules, and USB-C power delivery monitor circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.

Supply support for BZX84C3V3-7-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

This device belongs to the BZX84C series of standard Zener diodes designed specifically for cost-sensitive, high-volume voltage regulation and protection in automotive, industrial, and consumer applications.

FAQ

What is the maximum reverse voltage this Zener can withstand before breakdown?

The BZX84C3V3-7-F has a nominal Zener voltage of 3.3 V with a guaranteed range of 3.1–3.5 V at 5 mA test current. It begins controlled reverse breakdown at approximately 3.1 V and maintains regulation up to its 350 mW power limit. The absolute maximum non-destructive reverse voltage is not specified beyond its Zener range, as operation outside regulation degrades stability and increases leakage.

Is this part suitable for use in a 5 V rail overvoltage clamp?

No - the BZX84C3V3-7-F is rated for 3.3 V regulation and will conduct heavily if subjected to sustained 5 V reverse bias, exceeding its 350 mW rating and risking thermal failure. For 5 V rail clamping, select BZX84C5V1-7-F (5.1 V) or higher-voltage variants with matching power and impedance specs.

Does the SOT23 package support hand-soldering with hot air?

Yes - the SOT23 package is compatible with hot-air rework at standard profiles (peak 260°C, 30–60 sec). Its matte tin finish ensures reliable wetting, and the 0.008 g mass allows rapid, uniform heating. Avoid prolonged dwell above 260°C to prevent delamination or marking code degradation.

How does the –3.5 mV/°C temperature coefficient affect circuit accuracy?

Over a 100°C range (–40°C to +60°C), the Zener voltage shifts by –0.35 V, resulting in ~10.6% deviation from nominal 3.3 V. For high-accuracy references, this drift must be compensated via circuit topology (e.g., complementary diode pairs) or selected alongside ICs with built-in temperature correction.

BZX84C3V3-7-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):: 3.3 V

Tolerance:: ±6%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 95 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BZX84C3V3-7-F FAQ

1.How can I place an order for BZX84C3V3-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84C3V3-7-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 BZX84C3V3-7-F reliable?

The price and inventory of BZX84C3V3-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C3V3-7-F is usually 5 days.

3.What payment methods are accepted for BZX84C3V3-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C3V3-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84C3V3-7-F?

BZX84C3V3-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84C3V3-7-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 BZX84C3V3-7-F?

For technical support, including BZX84C3V3-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C3V3-7-F requirements.

6.How does Aetrix verify that BZX84C3V3-7-F is sourced from the original manufacturer or authorized distributors?

All BZX84C3V3-7-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 BZX84C3V3-7-F meets industry standards.

7.What is the process for return or replacement of BZX84C3V3-7-F?

All BZX84C3V3-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C3V3-7-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 BZX84C3V3-7-F part is unused and in its original packaging.

Return procedure for BZX84C3V3-7-F:

1.Submit a request within 90 days.

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

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