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

Nexperia USA Inc. BZX84-C3V3/DG/B3:2

Name: BZX84-C3V3/DG/B3:2
Brand: Nexperia USA Inc.
SKU: BZX84-C3V3/DG/B3:2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C3V3/DG/B3:2

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C3V3/DG/B3:2.pdf

Description:: DIODE ZENER 3.3V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:2,187

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Product details

Overview

BZX84-C3V3/DG/B3:2 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 3.3 V nominal breakdown at 5 mA, with 250 mW total power dissipation and 5 µA maximum reverse current at 1 V. It serves as a precision reference or low-power voltage clamp in power supply feedback paths, microcontroller reset circuits, and analog signal conditioning stages.

For engineers reviewing the BZX84-C3V3/DG/B3:2 datasheet, BZX84-C3V3/DG/B3:2 pinout, BZX84-C3V3/DG/B3:2 application, or BZX84-C3V3/DG/B3:2 equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (≤95 Ω at 5 mA), thermal resistance (330 K/W to solder point), and non-repetitive surge capability (40 W, 100 µs).

Technical Context

This device operates in reverse-bias breakdown mode, delivering stable regulation across ambient temperatures from −55 °C to +150 °C with a temperature coefficient of −3.5 mV/K at 5 mA. Its junction-to-solder-point thermal resistance of 330 K/W enables reliable operation on standard FR4 PCBs with single-sided copper.

The diode exhibits ≤95 Ω dynamic impedance at I_Z = 5 mA and maintains ≤5 µA reverse leakage at V_R = 1 V, supporting low-current biasing and sensing applications where minimal loading is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.10 V to 3.50 V at I_Z = 5 mA - defines regulation window under nominal test conditions
Power Dissipation (P_tot)	250 mW at T_amb ≤ 25 °C - sets maximum continuous DC power on standard FR4 PCB
Differential Resistance (r_dif)	≤95 Ω at I_Z = 5 mA - determines output impedance and load regulation sensitivity
Reverse Current (I_R)	≤5 µA at V_R = 1 V - ensures minimal standby leakage in high-impedance reference nodes
Non-repetitive Peak Power (P_ZSM)	40 W for 100 µs pulse - supports transient overvoltage clamping without failure
Junction Temperature (T_j)	−55 °C to +150 °C - enables use in industrial and extended-temperature environments
Forward Voltage (V_F)	≤0.9 V at I_F = 10 mA - specifies forward conduction loss when used in polarity-sensitive protection

Pinout & Package

Package: SOT23 (TO-236AB), surface-mount plastic package with 3 leads, 1.9 mm × 1.3 mm footprint, 1.1 mm height, and standard reflow-compatible solder lands.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connects to lower-potential node in reverse-bias regulation configuration
2	Not Connected (n.c.)	Internally unconnected; must remain floating - no PCB trace or via required
3	Cathode (K)	Connects to higher-potential node; carries regulated current and heat to PCB copper

Key Features

Feature	Design Value
±5 % Zener voltage tolerance	Enables cost-effective voltage referencing where tight regulation is not required
250 mW total power rating	Supports continuous operation in space-constrained, low-power embedded systems
330 K/W junction-to-solder-point thermal resistance	Allows direct thermal coupling to PCB copper for improved reliability without heatsinking
40 W non-repetitive peak power handling	Provides robust ESD and surge immunity in I/O line protection designs
SOT23 package compatibility	Ensures drop-in replacement in legacy designs using industry-standard footprint

Applications

Microcontroller Reset Circuit

Low-Voltage Reference Source

Use Scenario: Provides clean, stable 3.3 V threshold for brown-out detection in ARM Cortex-M0+ systems.

IC Role / Device Role / Timing Role: Zener diode acts as voltage comparator input reference for internal POR/BOR circuitry.

Use Value: Tight 3.10–3.50 V range ensures deterministic reset assertion across temperature and supply variation.

Use Scenario: Supplies reference voltage to ADC input scaling network in battery-powered sensor nodes.

IC Role / Device Role / Timing Role: Passive voltage reference establishing known analog input range for 12-bit SAR ADC.

Use Value: ≤5 µA reverse leakage prevents measurable error in high-impedance divider networks.

USB Port Overvoltage Clamp

Op-Amp Input Protection

Use Scenario: Clamps VBUS transients above 3.6 V during hot-plug events in USB 2.0 peripheral designs.

IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting voltage seen by downstream LDO and USB PHY.

Use Value: 40 W surge rating absorbs 100 µs ESD pulses per IEC 61000-4-2 Level 4 without degradation.

Use Scenario: Limits op-amp input voltage excursion beyond rail limits in instrumentation amplifier front-ends.

IC Role / Device Role / Timing Role: Bidirectional clamp (anode-to-rail, cathode-to-rail) preventing input stage saturation.

Use Value: ≤0.9 V forward voltage ensures fast turn-on during positive overvoltage, minimizing input stage stress.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5226BS-7-F	3.3 V ±5 %, 200 mW P_tot, 100 Ω r_dif at 20 mA	Higher test current shifts regulation point; lower power derates faster above 25 °C	Select when footprint compatibility with Diodes Inc. design libraries is required
1SMA5913BT3G	3.3 V ±5 %, 400 mW P_tot, DO-214AC package (SMA)	Larger package increases board area; higher power supports higher current loads	Select when >250 mW continuous dissipation or higher surge margin is needed

Compared with BZX84-C3V3/DG/B3:2, MMBZ5226BS-7-F offers identical voltage tolerance but reduced thermal performance due to lower power rating and higher dynamic impedance, while 1SMA5913BT3G trades SOT23 compactness for greater power handling and ruggedness in high-stress environments.

Availability

BZX84-C3V3/DG/B3:2 is available at Aetrix Electronics and suitable for microcontroller reset circuits, low-voltage reference sources, USB port overvoltage clamps, and op-amp input protection requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for BZX84-C3V3/DG/B3:2 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

Nexperia is a global semiconductor expert headquartered in Nijmegen, Netherlands, specializing in high-volume, high-reliability discrete and logic devices for consumer, industrial, and communications markets.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for cost-sensitive, space-constrained voltage regulation and protection tasks in mass-produced electronics.

FAQ

What is the maximum continuous reverse current this diode can regulate at 3.3 V?

The BZX84-C3V3/DG/B3:2 is specified for regulation at I_Z = 5 mA, with typical differential resistance ≤95 Ω. At 3.3 V, it supports up to 200 mA forward current (IF), but sustained reverse regulation above ~20 mA requires thermal derating per the 250 mW limit and 330 K/W R_th(j-sp).

Does Pin 2 require PCB connection or grounding?

No - Pin 2 is internally not connected (n.c.) and must remain electrically floating. No trace, pad, or via should be assigned to this terminal; routing it to ground or any net may cause assembly defects or functional anomalies.

How does the −3.5 mV/K temperature coefficient affect regulation accuracy over temperature?

At I_Z = 5 mA, the coefficient causes V_Z to decrease by 3.5 mV per Kelvin rise. Over a 100 °C range (−25 °C to +75 °C), this introduces up to ±350 mV drift - a ±10.6 % deviation from nominal 3.3 V - necessitating system-level compensation if sub-1 % stability is required.

Can this diode replace a BZX84-B3V3 in an existing design?

Yes, but with trade-offs: BZX84-C3V3 has wider tolerance (±5 % vs. ±2 %), higher differential resistance (≤95 Ω vs. ≤95 Ω typ. but tighter distribution), and identical package/pinout. System validation is required where tighter voltage stability or lower impedance is critical.

BZX84-C3V3/DG/B3:2 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 3.3 V

Tolerance:: ±5%

Power - Max:: 250 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 (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX84-C3V3/DG/B3:2 FAQ

1.How can I place an order for BZX84-C3V3/DG/B3:2 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C3V3/DG/B3:2 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 BZX84-C3V3/DG/B3:2 reliable?

The price and inventory of BZX84-C3V3/DG/B3:2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C3V3/DG/B3:2 is usually 5 days.

3.What payment methods are accepted for BZX84-C3V3/DG/B3:2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C3V3/DG/B3:2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C3V3/DG/B3:2?

BZX84-C3V3/DG/B3:2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C3V3/DG/B3:2 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 BZX84-C3V3/DG/B3:2?

For technical support, including BZX84-C3V3/DG/B3:2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C3V3/DG/B3:2 requirements.

6.How does Aetrix verify that BZX84-C3V3/DG/B3:2 is sourced from the original manufacturer or authorized distributors?

All BZX84-C3V3/DG/B3:2 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 BZX84-C3V3/DG/B3:2 meets industry standards.

7.What is the process for return or replacement of BZX84-C3V3/DG/B3:2?

All BZX84-C3V3/DG/B3:2 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C3V3/DG/B3:2, 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 BZX84-C3V3/DG/B3:2 part is unused and in its original packaging.

Return procedure for BZX84-C3V3/DG/B3:2:

1.Submit a request within 90 days.

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

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