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

Nexperia USA Inc. BZX8450-C4V7VL

Name: BZX8450-C4V7VL
Brand: Nexperia USA Inc.
SKU: BZX8450-C4V7VL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C4V7VL

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C4V7VL.pdf

Description:: DIODE ZENER 4.7V 250MW TO236AB

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Product details

Overview

BZX8450-C4V7VL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in portable electronics. It delivers a nominal 4.7 V regulation at 50 µA test current, with ±5 % tolerance, 600 Ω dynamic impedance at 5 mA, and 140 pF junction capacitance at 0 V - enabling stable operation in battery-powered sensor nodes and low-power microcontroller reset circuits.

For engineers reviewing the BZX8450-C4V7VL datasheet, BZX8450-C4V7VL pinout, BZX8450-C4V7VL application, or BZX8450-C4V7VL equivalent, this page provides verified electrical parameters, thermal resistance (330 K/W to solder point), reverse leakage behavior (≤3.0 µA at 4.0 V), and SOT23 terminal mapping to support low-bias analog design and PCB layout validation.

Technical Context

This device operates as a two-terminal shunt regulator, conducting in reverse breakdown to clamp voltage across its cathode-anode terminals. Its specified 4.7 V nominal Zener voltage is guaranteed at I_Z = 50 µA, with differential resistance ≤600 Ω at 5 mA and temperature coefficient of −2.7 mV/K - indicating negative drift over temperature.

The SOT23 package features Pin 1 (anode), Pin 2 (not connected), and Pin 3 (cathode), with thermal resistance from junction to solder point measured at 330 K/W. Maximum power dissipation is 250 mW at T_amb ≤ 25 °C on standard FR4 PCB, and non-repetitive surge capability reaches 40 W for 100 µs pulses.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	4.47 V to 4.94 V at I_Z = 50 µA - defines tight regulation window for low-current reference stability
Differential Resistance r_diff	≤600 Ω at I_Z = 5 mA - limits output voltage variation under small load current changes
Reverse Leakage I_R	≤3.0 µA at V_R = 4.0 V - ensures minimal quiescent current draw in battery-critical applications
Junction Capacitance C_d	140 pF at V_R = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in analog front-ends
Power Dissipation P_tot	250 mW at T_amb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB layout
Thermal Resistance R_th(j-sp)	330 K/W to cathode solder point - determines junction temperature rise under steady-state bias
Forward Voltage V_F	≤0.9 V at I_F = 10 mA - defines conduction loss when used in forward-biased protection or clamping roles

Pinout & Package

SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, single-sided copper FR4 mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward current entry point; reverse-biased connection to regulated node for shunt regulation
2	Not Connected (n.c.)	Internally unconnected terminal - must remain floating; no PCB trace or thermal pad required
3	Cathode (K)	Reference node connection; tied to system ground or voltage rail to establish Zener bias path

Key Features

Feature	Design Value
Low test current specification	Guaranteed V_Z at 50 µA - enables accurate regulation in ultra-low-power circuits where bias current is constrained
Optimized leakage profile	Intentional minor leakage rise (BZX8450-B11 to -C51 series) - improves switching speed and reduces noise in dynamic reference applications
Tight voltage tolerance	±5 % for C-series devices - supports consistent performance across production batches without trimming
Controlled temperature coefficient	−2.7 mV/K at 4.7 V - enables predictable drift compensation in temperature-sensitive analog blocks
Standardized SOT23 footprint	Compatible with industry-standard reflow and wave soldering land patterns - simplifies assembly and board space planning

Applications

Microcontroller Reset Circuit

Portable Sensor Biasing

Use Scenario: Generating a clean, stable 4.7 V threshold to trigger reset logic in ultra-low-power MCUs during brown-out conditions.

IC Role / Device Role / Timing Role: Shunt voltage reference providing precise trip-point detection independent of supply ripple.

Use Value: 3.0 µA max leakage at 4.0 V ensures negligible impact on battery life; 600 Ω dynamic impedance maintains trip accuracy across operating temperature.

Use Scenario: Supplying a stable bias voltage to analog front-end amplifiers and ADC references in wearable health monitors.

IC Role / Device Role / Timing Role: Low-current Zener reference establishing fixed DC offset for signal conditioning stages.

Use Value: 140 pF junction capacitance minimizes high-frequency coupling into sensitive analog paths; ±5 % tolerance ensures repeatable calibration across units.

USB-Powered Peripheral Regulation

IoT Node Power Sequencing

Use Scenario: Regulating 4.7 V from a 5 V USB source to power low-dropout LDO input stages in compact peripherals.

IC Role / Device Role / Timing Role: Pre-regulator absorbing transient surges and stabilizing input to downstream linear regulators.

Use Value: 40 W non-repetitive surge rating protects against USB hot-plug transients; 250 mW continuous rating supports sustained 5 mA bias loads.

Use Scenario: Enabling controlled power-up sequencing by holding enable lines at defined thresholds until main rails stabilize.

IC Role / Device Role / Timing Role: Voltage threshold detector defining timing windows for state-machine transitions in battery-backed modules.

Use Value: −2.7 mV/K temperature coefficient allows predictable delay shift over −40 °C to +85 °C; SOT23 size fits dense RF module layouts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5229BS-7-F (Diodes Inc.)	4.6 V nominal, ±5 %, 150 mW P_tot, 100 Ω r_diff at 20 mA - lower impedance but higher power derating above 25 °C	Requires higher test current (20 mA); less suitable for sub-100 µA bias systems	Select when tighter dynamic regulation is needed and bias current ≥20 mA is available
BZX84-C4V7 (Nexperia, standard variant)	Identical electrical specs but marked "C4V7" instead of "C4V7VL"; same SOT23 package and pinout	No functional difference - VL suffix denotes specific wafer lot or traceability code, not performance deviation	Use interchangeably where full traceability per JESD46 is not mandated

Compared with MMBZ5229BS-7-F, BZX8450-C4V7VL offers superior low-current regulation fidelity at 50 µA but higher dynamic impedance; versus BZX84-C4V7, it provides identical performance with enhanced manufacturing traceability for high-reliability programs.

Availability

BZX8450-C4V7VL is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable sensor biasing, and USB-powered peripheral regulation requiring stable component supply, consistent Zener voltage tolerance, and SOT23 assembly compatibility.

Supply support for BZX8450-C4V7VL 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 and industrial-grade components.

The BZX8450 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for energy-constrained applications where regulation stability at microampere bias currents is critical.

FAQ

What is the maximum reverse voltage before breakdown for BZX8450-C4V7VL?

The device exhibits sharp reverse breakdown at its nominal Zener voltage of 4.7 V, with guaranteed regulation between 4.47 V and 4.94 V at 50 µA. Below 4.0 V, reverse leakage remains ≤3.0 µA - confirming effective blocking up to 85 % of nominal V_Z. No distinct "maximum non-breakdown voltage" is specified; operation is intended within the regulated zone.

Can BZX8450-C4V7VL be used in forward conduction mode?

Yes - it functions as a standard silicon diode in forward bias, with forward voltage ≤0.9 V at 10 mA. However, its primary design intent is reverse-biased Zener regulation; forward use is limited to clamping or protection roles where its 200 mA absolute maximum forward current and thermal limits are respected.

How does the "VL" suffix affect electrical performance?

The "VL" suffix denotes a specific manufacturing traceability code per JESD46 standards and does not alter electrical characteristics. All BZX8450-C4V7VL units meet identical specifications to BZX84-C4V7, including Zener voltage range, dynamic resistance, and leakage - confirmed in Nexperia's Rev. 3 datasheet.

Is thermal derating required for operation above 25 °C ambient?

Yes - total power dissipation must be linearly reduced above 25 °C using R_th(j-a) = 500 K/W. At 70 °C ambient, maximum allowable P_tot drops to 138 mW. For high-temperature reliability, junction temperature must stay ≤150 °C, enforced via PCB copper area and airflow considerations.

BZX8450-C4V7VL Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX8450

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:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 3 V

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

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX8450-C4V7VL FAQ

1.How can I place an order for BZX8450-C4V7VL through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C4V7VL 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 BZX8450-C4V7VL reliable?

The price and inventory of BZX8450-C4V7VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C4V7VL is usually 5 days.

3.What payment methods are accepted for BZX8450-C4V7VL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C4V7VL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C4V7VL?

BZX8450-C4V7VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C4V7VL 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 BZX8450-C4V7VL?

For technical support, including BZX8450-C4V7VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C4V7VL requirements.

6.How does Aetrix verify that BZX8450-C4V7VL is sourced from the original manufacturer or authorized distributors?

All BZX8450-C4V7VL 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 BZX8450-C4V7VL meets industry standards.

7.What is the process for return or replacement of BZX8450-C4V7VL?

All BZX8450-C4V7VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C4V7VL, 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 BZX8450-C4V7VL part is unused and in its original packaging.

Return procedure for BZX8450-C4V7VL:

1.Submit a request within 90 days.

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

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