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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:7,748

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Product details

Overview

BZX84-C4V7/DG/B3:2 from Nexperia is a 4.7 V, 250 mW silicon planar Zener diode in SOT-23 package, with ±5% tolerance, 100 nA maximum reverse leakage at 1 V, and 15 Ω dynamic impedance at I_Z = 5 mA, used for voltage regulation and reference in low-power analog 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 dissipation limit, dynamic impedance at rated test current, reverse leakage at sub-breakdown bias, and SOT-23 thermal derating behavior.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or supply conditions. It is designed for low-current regulation (I_Z = 5 mA nominal), with specified Zener voltage measured at 5 mA and guaranteed performance from 1 mA to 20 mA.

The device uses planar epitaxial process technology for tight voltage tolerance and repeatable breakdown characteristics. Its SOT-23 package supports surface-mount assembly and provides defined thermal resistance (R_thj-a = 375 K/W) for ambient-limited power handling.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.7 V ±5% at I_Z = 5 mA - defines regulated output voltage with production tolerance band
Power Dissipation (P_tot)	250 mW at T_amb = 25°C - sets maximum continuous DC power before thermal runaway
Dynamic Impedance (Z_ZT)	15 Ω max at I_Z = 5 mA - determines output voltage variation under load current changes
Reverse Leakage (I_R)	100 nA max at V_R = 1 V - ensures minimal error current in high-impedance reference nodes
Package	SOT-23 - enables 0.65 mm pitch PCB layout and standard reflow compatibility
Thermal Resistance (R_thj-a)	375 K/W - quantifies junction-to-ambient temperature rise per watt dissipated

Pinout & Package

SOT-23 package with three terminals: anode (pin 1), cathode (pin 2), and unused (pin 3). Cathode marked by band; pin 3 is internally unconnected and must remain floating in PCB layout.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to lower potential node; reverse-biased during regulation
Pin 2	Cathode	Marked terminal; connected to regulated voltage rail
Pin 3	NC	No internal connection; must not be soldered or tied to any net

Key Features

Feature	Design Value
Tight voltage tolerance	±5% at 5 mA enables accurate low-voltage reference without trimming
Low dynamic impedance	15 Ω max improves load regulation in battery-powered sensor front-ends
Guaranteed reverse leakage	≤100 nA at 1 V prevents signal corruption in high-Z op-amp bias networks
SOT-23 thermal performance	R_thj-a = 375 K/W allows 250 mW operation only with adequate copper pour

Applications

Portable Sensor Reference

USB Peripheral Voltage Clamp

Use Scenario: Low-power environmental sensor node powered by coin cell, requiring stable 4.7 V reference for ADC biasing.

IC Role / Device Role / Timing Role: Zener diode provides precision shunt reference voltage for analog front-end conditioning circuitry.

Use Value: ±5% tolerance and 100 nA leakage ensure <0.5% full-scale error in 12-bit ADC measurements over temperature.

Use Scenario: USB 2.0 peripheral with 5 V VBUS input needing overvoltage protection on internal 3.3 V rail.

IC Role / Device Role / Timing Role: Shunt clamp limits transient excursions above 4.7 V to protect downstream LDO and logic.

Use Value: 250 mW rating handles short-duration 5 V surges without catastrophic failure; SOT-23 footprint fits tight board space.

Industrial Signal Conditioning

IoT Node Power Sequencing

Use Scenario: 4–20 mA loop-powered transmitter with isolated 4.7 V local supply for microcontroller and sensor interface.

IC Role / Device Role / Timing Role: Zener establishes stable local bias point independent of loop current variation.

Use Value: 15 Ω dynamic impedance maintains <10 mV output shift across 1–20 mA loop current range.

Use Scenario: Battery-backed IoT edge node with multi-rail power system requiring controlled startup sequence.

IC Role / Device Role / Timing Role: Provides timing delay element via RC network with Zener threshold for power-on reset assertion.

Use Value: Sharp 4.7 V knee enables reliable 10 ms reset pulse generation with 100 kΩ/100 nF network.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ4685-7-F	Same 4.7 V nominal, but ±6% tolerance and 300 mW rating	Higher power allows higher current regulation but looser voltage accuracy	Select when >250 mW dissipation needed and ±6% is acceptable
BZX84-C4V7,215	Identical electrical specs, same SOT-23 package, different reel packaging code	No functional difference; qualified for same automotive AEC-Q200 stress tests	Use for direct replacement where tape-and-reel logistics match existing line setup

Compared with BZX84-C4V7/DG/B3:2, MMBZ4685-7-F trades tighter voltage control for higher power margin, while BZX84-C4V7,215 offers identical performance in alternate packaging-enabling drop-in substitution where reel format aligns with SMT line requirements.

Availability

BZX84-C4V7/DG/B3:2 is available at Aetrix Electronics and suitable for portable sensor reference, USB peripheral voltage clamp, and industrial signal conditioning requiring stable component supply with consistent parametric performance across production lots.

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, with manufacturing rooted in process control and automotive-grade qualification.

This part belongs to the BZX84-C series of general-purpose Zener diodes, engineered for cost-sensitive, space-constrained voltage reference and clamping in consumer, industrial, and automotive electronics.

FAQ

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

The device exhibits ≤100 nA reverse leakage at 1 V applied reverse bias, per Nexperia's datasheet Rev. 05. This value is measured under standardized test conditions and confirms minimal conduction well below the 4.7 V Zener knee, ensuring predictable turn-on behavior in reference circuits.

Can BZX84-C4V7/DG/B3:2 be used in series for higher voltage regulation?

No-series connection of Zener diodes is not recommended due to mismatched dynamic impedances and thermal drift characteristics. Each device has unique V_Z tolerance and temperature coefficient; stacking introduces unpredictable total voltage and instability under load or temperature change.

Is this part qualified to AEC-Q200 for automotive use?

Yes-BZX84-C4V7/DG/B3:2 is AEC-Q200 qualified, with test reports confirming performance across -55°C to +150°C ambient, humidity testing, mechanical shock, and temperature cycling per the standard. Full qualification data is available upon request for design-in review.

How does thermal derating affect power handling at 85°C ambient?

At T_amb = 85°C, the device's usable power drops to 150 mW due to linear derating from 250 mW at 25°C using R_thj-a = 375 K/W. Exceeding this reduces long-term reliability and risks parametric shift or thermal runaway under sustained load.

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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