Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. BZX38450-B3V0-QX

Name: BZX38450-B3V0-QX
Brand: Nexperia USA Inc.
SKU: BZX38450-B3V0-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZX38450-B3V0-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: BZX38450-B3V0-QX.pdf

Description:: DIODE ZENER 3V 300MW SOD323

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,652

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BZX38450-B3V0-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.0 V nominal regulation at 50 µA test current, with ±2 % tolerance, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive use.

For engineers reviewing the BZX38450-B3V0-Q datasheet, BZX38450-B3V0-Q pinout, BZX38450-B3V0-Q application, or BZX38450-B3V0-Q equivalent, this device serves as a precision low-bias voltage reference in battery-powered sensor nodes, automotive body control modules, and portable instrumentation where stable 3.0 V regulation at microampere-level currents is required.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.94 V to 3.06 V at I_Z = 50 µA, exhibiting a differential resistance ≤600 Ω at 5 mA and a temperature coefficient of −3.5 mV/K. Its low leakage current (≤0.8 µA at V_R = 2.4 V) supports ultra-low-power biasing.

Designed for surface-mount assembly on FR4 PCBs, it delivers thermal resistance of 415 K/W (junction-to-ambient) and 110 K/W (junction-to-solder point), enabling reliable operation up to 150 °C junction temperature under defined mounting conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	3.0 V (2.94–3.06 V at 50 µA); enables precise 3.0 V reference generation in low-current circuits
Tolerance	±2 % (B-series); ensures tight voltage accuracy without post-calibration in production
Test Current	50 µA; allows stable regulation in battery-powered systems drawing sub-100 µA quiescent current
Max Power Dissipation	300 mW at T_amb ≤ 25 °C; supports continuous operation in compact SOD323 footprint with standard PCB layout
Differential Resistance	≤600 Ω at 5 mA; maintains regulation stability under small load variations in feedback paths
Junction Temperature Limit	150 °C; meets automotive under-hood thermal requirements per AEC-Q101 qualification
Reverse Leakage	≤0.8 µA at V_R = 2.4 V; minimizes standby current in always-on monitoring circuits

Pinout & Package

SOD323 (SC-76) plastic surface-mount package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation
2	Anode (A)	Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive applications including body electronics and infotainment power rails
Low test current operation	Specified at 50 µA - enables use in energy-constrained designs such as coin-cell IoT sensors
Controlled temperature coefficient	−3.5 mV/K - supports predictable drift compensation in ambient-varying environments
Optimized leakage profile	0.8 µA max at 2.4 V - reduces parasitic drain in always-on voltage monitor circuits
Small-outline SMD packaging	SOD323 footprint - saves board space in high-density automotive ECUs and wearable devices

Applications

Automotive Body Control Module

Portable Medical Sensor Node

Use Scenario: Voltage reference for LIN bus transceiver biasing and microcontroller ADC reference in door module ECUs.

IC Role / Device Role / Timing Role: Zener regulator providing stable 3.0 V supply to analog front-end and communication ICs.

Use Value: Maintains <±10 mV output variation across −40 °C to +125 °C ambient, ensuring signal integrity in harsh vehicle environments.

Use Scenario: Precision reference for ECG amplifier offset calibration in disposable patch monitors powered by CR2032 batteries.

IC Role / Device Role / Timing Role: Low-current voltage reference establishing DC bias point for op-amp input stages.

Use Value: Draws only 50 µA during active measurement, extending battery life beyond 12 months at 10-minute sampling intervals.

Industrial Temperature Transmitter

Smart Home Smoke Detector

Use Scenario: Reference source for 4–20 mA loop-powered RTD signal conditioning circuitry in factory-floor sensors.

IC Role / Device Role / Timing Role: Zener diode regulating excitation voltage for bridge-based sensing elements.

Use Value: Delivers <0.5 % regulation error over 10-year field deployment due to AEC-Q101-grade material stability.

Use Scenario: Stable bias generator for photoelectric smoke chamber amplification stage in battery-operated residential alarms.

IC Role / Device Role / Timing Role: Low-leakage voltage reference setting comparator threshold for smoke detection logic.

Use Value: Enables <1 µA sleep-mode current, supporting 10-year battery life with annual self-test cycles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ4684T1G	3.0 V, ±5 % tolerance, 500 mW rating, SOD-123 package	Higher power capability but looser tolerance and larger footprint	Select when higher surge immunity is needed and ±2 % accuracy is not required
BZX384-C3V0-Q	3.0 V, ±5 % tolerance, identical SOD323 package and AEC-Q101 qualification	Relaxed tolerance enables cost reduction in non-critical biasing functions	Select for cost-sensitive automotive subsystems where 3.0 V ±5 % meets system margin

Compared with BZX38450-B3V0-Q, MMSZ4684T1G offers higher power headroom but sacrifices accuracy and board-space efficiency, while BZX384-C3V0-Q retains identical form factor and automotive qualification but trades ±2 % precision for lower unit cost in less demanding regulation roles.

Availability

BZX38450-B3V0-Q is available at Aetrix Electronics and suitable for automotive body electronics, portable medical sensors, and industrial loop-powered transmitters requiring stable component supply with AEC-Q101 compliance and long-term lifecycle support.

Supply support for BZX38450-B3V0-Q 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage regulation in automotive and portable electronics where precision, reliability, and miniaturization are critical.

FAQ

What is the maximum reverse voltage this diode can withstand before breakdown?

The BZX38450-B3V0-Q has a nominal Zener voltage of 3.0 V, with guaranteed breakdown occurring between 2.94 V and 3.06 V at 50 µA test current. It is not rated for sustained operation above its specified V_Z range; exceeding 3.06 V risks uncontrolled conduction or thermal runaway under unregulated current conditions.

Can this Zener diode be used in forward-bias mode as a regular rectifier?

No - the BZX38450-B3V0-Q is optimized for reverse-bias Zener operation. Its forward voltage is 0.9 V at 10 mA, but it lacks the surge current rating, soft recovery, or low VF optimization of dedicated rectifiers. Using it forward-biased risks premature failure under repetitive switching or high IF stress.

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

At a 100 °C ambient shift (e.g., −40 °C to +60 °C), the Zener voltage drifts approximately −350 mV, resulting in a 3.0 V reference shifting to ~2.65 V. System-level compensation (e.g., matched resistor networks or digital calibration) is required for applications needing better than ±50 mV stability across that range.

Is the SOD323 package compatible with standard reflow soldering profiles?

Yes - the BZX38450-B3V0-Q is qualified for lead-free reflow per J-STD-020. Recommended peak temperature is 260 °C for ≤30 seconds, with ramp-up rate ≤3 °C/s. The device uses standard SOD323 footprint dimensions (1.3 mm pitch, 0.5 mm pad width) shown in Figure 10 of the datasheet.

BZX38450-B3V0-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX38450-Q

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 3 V

Tolerance:: ±2%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 800 nA @ 1 V

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

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323

BZX38450-B3V0-QX FAQ

1.How can I place an order for BZX38450-B3V0-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX38450-B3V0-QX 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 BZX38450-B3V0-QX reliable?

The price and inventory of BZX38450-B3V0-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B3V0-QX is usually 5 days.

3.What payment methods are accepted for BZX38450-B3V0-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B3V0-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX38450-B3V0-QX?

BZX38450-B3V0-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX38450-B3V0-QX 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 BZX38450-B3V0-QX?

For technical support, including BZX38450-B3V0-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B3V0-QX requirements.

6.How does Aetrix verify that BZX38450-B3V0-QX is sourced from the original manufacturer or authorized distributors?

All BZX38450-B3V0-QX 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 BZX38450-B3V0-QX meets industry standards.

7.What is the process for return or replacement of BZX38450-B3V0-QX?

All BZX38450-B3V0-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B3V0-QX, 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 BZX38450-B3V0-QX part is unused and in its original packaging.

Return procedure for BZX38450-B3V0-QX:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…