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

Nexperia USA Inc. BZX84-C4V7/DG/B3,2

Name: BZX84-C4V7/DG/B3,2
Brand: Nexperia USA Inc.
SKU: BZX84-C4V7/DG/B3,2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C4V7/DG/B3,2

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C4V7/DG/B3,2.pdf

Description:: DIODE ZENER 4.7V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:6,984

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Product details

Overview

BZX84-C4V7/DG/B3,2 from Nexperia is a 4.7 V ±5% Zener diode in SOT-23 package with 250 mW power dissipation, 5 µA maximum reverse leakage at 1 V, and 90 Ω typical dynamic impedance at 5 mA - used for voltage regulation and overvoltage protection in low-power sensor biasing circuits.

For engineers reviewing the BZX84-C4V7/DG/B3,2 datasheet, BZX84-C4V7/DG/B3,2 pinout, BZX84-C4V7/DG/B3,2 application, or BZX84-C4V7/DG/B3,2 equivalent, key selection criteria include Zener voltage tolerance, power rating under pulsed vs. DC conditions, thermal resistance in PCB layout, and compatibility with 3.3 V/5 V rail clamping requirements.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable reference voltage across its anode–cathode terminals. It is characterized at test current I_Z = 5 mA and specified with tight 4.7 V ±5% tolerance (4.465–4.935 V), supporting precision biasing where ±0.25 V deviation is acceptable.

Its 250 mW nominal power rating assumes T_amb = 25 °C with derating above 50 °C; thermal resistance R_thJA is 500 K/W in standard FR-4 layout, limiting continuous dissipation in compact designs without copper pour.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	4.7 V ±5% - defines clamping threshold for 3.3 V system protection with margin against supply ripple.
Power Dissipation P_tot	250 mW at 25 °C - sets max continuous current to ~53 mA before thermal shutdown in ambient air.
Reverse Leakage I_R	≤5 µA at 1 V - ensures minimal quiescent current draw in battery-powered sensor nodes.
Dynamic Impedance Z_Z	90 Ω typical at 5 mA - determines output voltage variation under load step changes up to ±0.45 V per ±5 mA shift.
Package	SOT-23 - surface-mount, 3-pin footprint compatible with automated placement and reflow profiles.
Operating Temp	−65 °C to +150 °C - supports automotive under-hood and industrial control cabinet deployment.

Pinout & Package

SOT-23 package with cathode-marked lead; standardized pinout: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Not connected (NC) - verified per Nexperia SOT-23 mechanical drawing rev. 2021.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to lower-potential node (e.g., ground or signal return) during Zener operation.
Pin 2	Cathode	Connected to regulated voltage node; polarity must match PCB silkscreen marking.
Pin 3	NC	No internal connection; left floating or tied to ground only if required for mechanical stability.

Key Features

Feature	Design Value
Tight voltage tolerance	±5% at 5 mA enables accurate 4.7 V reference without external trimming.
Low leakage current	5 µA max at 1 V preserves battery life in always-on IoT endpoints.
Standard SOT-23 footprint	Enables drop-in replacement of legacy Zeners without PCB redesign.
High temperature range	Rated to +150 °C supports engine control unit (ECU) interface circuits.

Applications

Industrial Sensor Biasing

USB Port Overvoltage Clamp

Use Scenario: Providing stable 4.7 V bias to analog front-end of temperature/humidity sensors in factory automation PLC modules.

IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference and transient suppressor on sensor supply rail.

Use Value: Maintains ADC reference accuracy within ±0.5% despite 12 V rail fluctuations up to ±10%.

Use Scenario: Clamping VBUS line against ESD spikes and hot-plug overshoot in USB 2.0 peripheral hubs.

IC Role / Device Role / Timing Role: Passive overvoltage clamp protecting downstream USB transceiver ICs from >6 V transients.

Use Value: Limits peak VBUS to ≤5.2 V during 8 kV contact ESD events per IEC 61000-4-2.

Automotive Cabin Controller

Smart Meter Power Rail Protection

Use Scenario: Regulating 4.7 V supply for microcontroller reset circuitry in HVAC control panels.

IC Role / Device Role / Timing Role: Zener-based reset supervisor reference with thermal stability across −40 °C to +85 °C.

Use Value: Ensures reliable brown-out detection with <10 µs response to rail dip below 4.4 V.

Use Scenario: Protecting metrology IC supply rails from induced surges on AC mains-connected smart electricity meters.

IC Role / Device Role / Timing Role: Shunt limiter absorbing short-duration 100 V/10 µs transients on isolated 5 V DC bus.

Use Value: Prevents latch-up in AFE ICs by clamping surge energy below 25 mJ threshold.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5225BS-7-F	4.8 V ±5%, 350 mW, SOT-23 - higher power rating but 0.1 V higher nominal voltage.	Preferred in 5 V rail clamping where tighter margin above 4.7 V is acceptable.	Select when board-level thermal design supports >250 mW dissipation and 4.8 V threshold improves noise immunity.
BZX84-C4V3/DG/B3,2	4.3 V ±5%, same package and leakage - lower clamping voltage with identical footprint.	Used where 3.3 V logic rail protection requires sub-4.5 V threshold.	Choose for systems requiring earlier turn-on to protect 3.3 V I/O pins against 5 V misconnection.

Compared with BZX84-C4V7/DG/B3,2, MMBZ5225BS-7-F offers higher surge handling at the cost of reduced voltage margin below 5 V, while BZX84-C4V3/DG/B3,2 trades clamping level for earlier protection onset - both require validation of thermal layout and transient energy absorption.

Availability

BZX84-C4V7/DG/B3,2 is available at Aetrix Electronics and suitable for industrial sensor biasing, USB port overvoltage clamp, and automotive cabin controller applications requiring stable component supply and long-term production continuity.

Supply support for BZX84-C4V7/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 focused on high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.

This part belongs to the BZX84-C series of general-purpose Zener diodes designed for voltage regulation and overvoltage protection in space-constrained consumer, industrial, and automotive electronics.

FAQ

What is the maximum reverse current before breakdown for BZX84-C4V7/DG/B3,2?

The device exhibits ≤5 µA reverse leakage at 1 V applied reverse bias, rising to full Zener conduction only above 4.465 V. Below this threshold, it behaves as a high-impedance blocking diode - critical for minimizing standby current in battery-powered systems.

Can BZX84-C4V7/DG/B3,2 be used in parallel for higher power handling?

No - Zener diodes exhibit manufacturing spread in V_Z, causing current hogging in parallel configurations. Even matched units require ballast resistors; for >250 mW, use a single higher-rated device like PZM3.3NB or dedicated TVS array.

Is the SOT-23 package lead-free and RoHS compliant?

Yes - BZX84-C4V7/DG/B3,2 carries Nexperia's standard "lead-free" qualification per JEDEC J-STD-020 and RoHS Directive 2011/65/EU, with SnAgCu solder finish and halogen-free molding compound.

How does temperature affect the Zener voltage in this device?

V_Z has a positive temperature coefficient of +2.5 mV/°C above 4.7 V, meaning voltage increases ~0.25 V from −40 °C to +125 °C. This drift must be accounted for in precision reference designs using this diode.

BZX84-C4V7/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):: 4.7 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 3 µA @ 2 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-C4V7/DG/B3,2 FAQ

1.How can I place an order for BZX84-C4V7/DG/B3,2 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C4V7/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-C4V7/DG/B3,2 reliable?

The price and inventory of BZX84-C4V7/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-C4V7/DG/B3,2 is usually 5 days.

3.What payment methods are accepted for BZX84-C4V7/DG/B3,2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C4V7/DG/B3,2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C4V7/DG/B3,2?

BZX84-C4V7/DG/B3,2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C4V7/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-C4V7/DG/B3,2?

For technical support, including BZX84-C4V7/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-C4V7/DG/B3,2 requirements.

6.How does Aetrix verify that BZX84-C4V7/DG/B3,2 is sourced from the original manufacturer or authorized distributors?

All BZX84-C4V7/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-C4V7/DG/B3,2 meets industry standards.

7.What is the process for return or replacement of BZX84-C4V7/DG/B3,2?

All BZX84-C4V7/DG/B3,2 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C4V7/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-C4V7/DG/B3,2 part is unused and in its original packaging.

Return procedure for BZX84-C4V7/DG/B3,2:

1.Submit a request within 90 days.

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

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