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

Nexperia USA Inc. BZX84-B4V7/DG/B4R

Name: BZX84-B4V7/DG/B4R
Brand: Nexperia USA Inc.
SKU: BZX84-B4V7/DG/B4R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-B4V7/DG/B4R

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-B4V7/DG/B4R.pdf

Description:: DIODE ZENER 4.7V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:7,739

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Product details

Overview

BZX84-B4V7/DG/B4R from Nexperia is a 4.7 V, 250 mW silicon planar Zener diode in SOT23 package, with ±2% tolerance, 5 µA maximum leakage at 1 V, and 90 Ω dynamic impedance at 5 mA, used for voltage regulation and reference in low-power analog circuits.

For engineers reviewing the BZX84-B4V7/DG/B4R datasheet, BZX84-B4V7/DG/B4R pinout, BZX84-B4V7/DG/B4R application, or BZX84-B4V7/DG/B4R equivalent, key selection criteria include Zener voltage accuracy, power dissipation limit, temperature coefficient, dynamic impedance stability, and SOT23 footprint compatibility with space-constrained PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its terminals under varying load and supply conditions. It is characterized by a nominal Zener voltage of 4.7 V at test current I_Z = 5 mA, with a temperature coefficient of +2.5 mV/K and a maximum power dissipation of 250 mW at T_amb = 25 °C.

The device uses planar epitaxial process technology to ensure tight voltage tolerance (±2%), low noise, and repeatable breakdown characteristics. Its SOT23-3 package supports surface-mount assembly and provides thermal performance suitable for ambient temperatures up to 150 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.7 V ±2% at I_Z = 5 mA - defines precise voltage reference point for biasing or regulation
Power Dissipation (P_tot)	250 mW at T_amb = 25 °C - limits continuous operating current to ~53 mA at 4.7 V
Dynamic Impedance (Z_ZT)	90 Ω max at I_Z = 5 mA - determines output voltage variation under load transients
Leakage Current (I_R)	≤5 µA at V_R = 1 V - ensures minimal error current in high-impedance reference paths
Temperature Coefficient	+2.5 mV/K - quantifies V_Z drift over temperature, critical for precision references
Package	SOT23 - standard 3-pin surface-mount footprint compatible with automated placement and reflow

Pinout & Package

SOT23-3 plastic surface-mount package with gull-wing leads; standardized pin assignment per JEDEC TO-236AB.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reverse-biased cathode connection	Connected to lower potential side in Zener operation; enables current flow into cathode
Cathode (Pin 2)	Reverse-biased anode connection	Connected to higher potential side; voltage develops across cathode-to-anode during breakdown
No Connect (Pin 3)	Unused terminal	Internally unconnected; no electrical function or thermal path contribution

Key Features

Feature	Design Value
Tight voltage tolerance	±2% at 4.7 V enables accurate biasing without post-calibration in sensor front-ends
Low dynamic impedance	90 Ω max improves regulation stability under 1–10 mA load variations
Low leakage current	≤5 µA at 1 V minimizes error in high-resistance divider networks
JEDEC-standard SOT23	Enables drop-in replacement in existing 3-pin Zener footprints without layout change

Applications

Power Supply Reference

Overvoltage Protection Clamp

Use Scenario: Providing stable 4.7 V reference for ADC voltage dividers in battery-powered IoT sensors.

IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference in precision analog signal conditioning chain.

Use Value: ±2% tolerance and +2.5 mV/K TC allow <±15 mV total drift over –40°C to +85°C, meeting 12-bit ADC reference accuracy.

Use Scenario: Clamping transient spikes on 5 V logic rail caused by ESD or inductive switching.

IC Role / Device Role / Timing Role: Shunt protection device limiting rail voltage to 4.7 V + dynamic overshoot margin.

Use Value: 250 mW rating sustains short-duration clamping events without thermal runaway in 3.3/5 V microcontroller I/O protection.

LED Current Regulation

Comparator Threshold Setting

Use Scenario: Biasing constant-current LED driver ICs requiring fixed reference voltage.

IC Role / Device Role / Timing Role: Voltage reference source for current-sense amplifier feedback network.

Use Value: Low 90 Ω Z_ZT maintains stable reference despite current ripple, ensuring <±2% LED brightness variation.

Use Scenario: Setting trip point for window comparator monitoring 5 V supply health.

IC Role / Device Role / Timing Role: Precision threshold element defining upper bound of acceptable voltage range.

Use Value: 4.7 V ±2% sets reliable 4.61–4.79 V detection window, rejecting noise while capturing brownout events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ4704T1G	Same 4.7 V ±2%, but 500 mW rating and SOD-123 package	Higher power handling suits higher-current clamp circuits; larger footprint requires layout revision	Select when >250 mW surge energy must be absorbed without derating
BZX84-C4V7	Same SOT23 package and 4.7 V nominal, but ±5% tolerance and higher Z_ZT (100 Ω)	Lower cost alternative where ±5% reference accuracy is acceptable	Choose for non-critical biasing where tighter tolerance is unnecessary

Compared with MMSZ4704T1G, BZX84-B4V7/DG/B4R offers smaller SOT23 footprint and tighter tolerance but lower power; versus BZX84-C4V7, it delivers improved accuracy and lower impedance at identical form factor-critical for precision analog designs.

Availability

BZX84-B4V7/DG/B4R is available at Aetrix Electronics and suitable for voltage reference design, overvoltage clamping, LED biasing, and comparator threshold setting requiring stable component supply and consistent parametric performance across production batches.

Supply support for BZX84-B4V7/DG/B4R 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 leadership in automotive-qualified components and efficient manufacturing.

This part belongs to the BZX84 series of precision Zener diodes designed specifically for space-constrained, low-power voltage reference and protection applications in consumer, industrial, and automotive electronics.

FAQ

What is the maximum reverse current before breakdown for BZX84-B4V7/DG/B4R?

The maximum reverse leakage current is 5 µA at 1 V reverse bias, measured per Nexperia's official datasheet. This value ensures negligible loading on high-impedance reference nodes. At voltages below 1 V, leakage drops further-typically sub-nanoampere-and remains stable across temperature ranges from –65 °C to +150 °C.

Can BZX84-B4V7/DG/B4R be used in series for higher reference voltage?

Yes, multiple BZX84-B4V7/DG/B4R diodes can be stacked in series to achieve higher reference voltages, such as 9.4 V using two units. However, tolerance accumulates (±2.8% for two), and dynamic impedance adds linearly-90 Ω per device becomes 180 Ω total-reducing regulation effectiveness under load variation.

Is this Zener diode qualified for automotive applications?

No-BZX84-B4V7/DG/B4R is not AEC-Q200 qualified. Nexperia offers the BZX84-A4V7 variant for automotive use, which includes extended temperature screening (–55 °C to +150 °C), enhanced moisture resistance, and full AEC-Q200 compliance testing. This part is intended for commercial and industrial-grade systems only.

How does temperature affect the Zener voltage in normal operation?

The specified temperature coefficient is +2.5 mV/K, meaning V_Z increases by approximately 2.5 mV per degree Celsius rise above 25 °C. Over –40 °C to +125 °C, total drift is calculated as ΔT × 2.5 mV/K, resulting in ±212.5 mV shift relative to 25 °C baseline-within ±4.5% of nominal 4.7 V.

BZX84-B4V7/DG/B4R 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:: Active

Voltage - Zener (Nom) (Vz):: 4.7 V

Tolerance:: ±2%

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-B4V7/DG/B4R FAQ

1.How can I place an order for BZX84-B4V7/DG/B4R through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-B4V7/DG/B4R 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-B4V7/DG/B4R reliable?

The price and inventory of BZX84-B4V7/DG/B4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B4V7/DG/B4R is usually 5 days.

3.What payment methods are accepted for BZX84-B4V7/DG/B4R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B4V7/DG/B4R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-B4V7/DG/B4R?

BZX84-B4V7/DG/B4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-B4V7/DG/B4R 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-B4V7/DG/B4R?

For technical support, including BZX84-B4V7/DG/B4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B4V7/DG/B4R requirements.

6.How does Aetrix verify that BZX84-B4V7/DG/B4R is sourced from the original manufacturer or authorized distributors?

All BZX84-B4V7/DG/B4R 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-B4V7/DG/B4R meets industry standards.

7.What is the process for return or replacement of BZX84-B4V7/DG/B4R?

All BZX84-B4V7/DG/B4R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B4V7/DG/B4R, 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-B4V7/DG/B4R part is unused and in its original packaging.

Return procedure for BZX84-B4V7/DG/B4R:

1.Submit a request within 90 days.

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

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