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

Nexperia USA Inc. BZX8450-C8V2-QVL

Name: BZX8450-C8V2-QVL
Brand: Nexperia USA Inc.
SKU: BZX8450-C8V2-QVL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C8V2-QVL

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C8V2-QVL.pdf

Description:: DIODE ZENER 8.2V 250MW TO236AB

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Product details

Overview

BZX8450-C8V2-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in automotive and portable electronics. It delivers 8.2 V nominal regulation at 50 µA test current, with ±5 % tolerance, 80 Ω differential resistance at 5 mA, and 3.2 mV/K temperature coefficient. Its 250 mW power rating and AEC-Q101 qualification support use in engine control modules and battery-powered sensor interfaces.

For engineers reviewing the BZX8450-C8V2-QVL datasheet, BZX8450-C8V2-QVL pinout, BZX8450-C8V2-QVL application, or BZX8450-C8V2-QVL equivalent, key selection criteria include low-test-current regulation stability, thermal resistance (330 K/W junction-to-solder-point), leakage-optimized switching behavior per AN90031, and SOT23 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode with specified regulation at I_Z = 50 µA - enabling ultra-low quiescent current operation ideal for always-on automotive subsystems. Its intentional minor leakage rise (per BZX8450-B/C11-Q to -C51-Q series) reduces switching noise and improves transient response in feedback paths.

The device exhibits a positive temperature coefficient of +3.2 mV/K at 8.2 V, ensuring predictable drift under thermal cycling. With 6.2 pF capacitance at 0 V and <0.1 µA reverse current at 6.9 V, it maintains signal integrity in high-frequency reference and clamp circuits without loading sensitive nodes.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	8.2 V at I_Z = 50 µA - stable reference point for low-power analog sensing and microcontroller reset circuits
Tolerance	±5 % - supports cost-sensitive automotive applications where tight regulation is balanced against production yield
Differential Resistance	80 Ω at I_Z = 5 mA - limits output impedance variation across operating current range, critical for ripple rejection
Temperature Coefficient	+3.2 mV/K - enables predictable voltage drift compensation in ambient temperature ranges from −40 °C to +125 °C
Forward Voltage	0.9 V at I_F = 10 mA - defines minimum forward conduction threshold for protection or clamping configurations
Power Dissipation	250 mW at T_amb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling without heatsinking
Junction-to-Solder-Point Thermal Resistance	330 K/W - determines thermal path efficiency from die to PCB copper, essential for reliability in reflow-soldered automotive assemblies

Pinout & Package

SOT23 plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body, with standard footprint per Figure 10 (reflow soldering).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connects to lower-potential node in reverse-biased Zener configuration; must be routed with minimal trace inductance for noise-sensitive references
2	Not Connected (n.c.)	Internally unconnected terminal - must remain floating; no PCB pad connection or routing required
3	Cathode (K)	Connects to higher-potential node; serves as primary thermal path to PCB via cathode tab (R_th(j-sp) = 330 K/W)

Key Features

Feature	Design Value
Low-test-current regulation	Specified at 50 µA - enables direct integration into micropower MCU supervisor circuits without additional bias resistors
AEC-Q101 qualification	Qualified for automotive-grade reliability - meets stress test requirements for temperature cycling, HTRB, and ESD per AEC standard
Optimized leakage profile	Intentional minor leakage rise per AN90031 - reduces switching transients and broadband noise in feedback loops of DC-DC converters
Thermal performance	R_th(j-sp) = 330 K/W - allows sustained operation up to 125 °C ambient when mounted on standard FR4 with tin-plated copper

Applications

Engine Control Unit Reference

Automotive Cabin Sensor Bias

Use Scenario: Provides stable 8.2 V reference for analog front-end of knock sensor amplifier in ICE powertrain systems.

IC Role / Device Role / Timing Role: Zener voltage reference source for op-amp biasing and ADC reference divider networks.

Use Value: ±5 % tolerance and +3.2 mV/K TC ensure <±20 mV total drift over −40 °C to +125 °C, meeting ASIL-B functional safety margin requirements.

Use Scenario: Supplies regulated bias to MEMS humidity and temperature sensors in HVAC control modules.

IC Role / Device Role / Timing Role: Low-current voltage regulator maintaining constant sensor excitation voltage during battery brownout events.

Use Value: 50 µA test current enables operation down to 3.3 V supply rails with minimal load impact, extending system uptime in 12 V vehicle electrical architecture.

Portable Medical Monitor Reference

Industrial IoT Node Power Management

Use Scenario: Generates precise reference for ECG signal conditioning circuitry in battery-powered patient monitors.

IC Role / Device Role / Timing Role: Precision Zener shunt regulator stabilizing op-amp supply rail in analog acquisition chain.

Use Value: 6.2 pF capacitance and <0.1 µA leakage at 6.9 V prevent signal coupling and baseline drift in sub-mV biomedical measurements.

Use Scenario: Regulates voltage for LoRaWAN transceiver bias in solar-charged remote telemetry units.

IC Role / Device Role / Timing Role: Low-quiescent shunt regulator maintaining stable 8.2 V for RF power amplifier gate control.

Use Value: 250 mW power rating and SOT23 footprint allow integration into space-constrained edge nodes while supporting intermittent 100 mA transmit bursts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C8V2,215	Same 8.2 V, ±5 %, SOT23 package but non-AEC-Q101; higher r_diff (100 Ω vs. 80 Ω); no intentional leakage optimization	Limited to industrial/commercial grade; unsuitable for automotive under-hood environments requiring AEC qualification	Select when cost sensitivity outweighs automotive qualification and thermal/noise performance requirements
MMSZ5238BT1G	8.2 V, ±5 %, SOD-123 package; 100 Ω r_diff; 500 mW P_tot; no AEC-Q101; different thermal resistance (R_th(j-a) = 500 K/W)	Higher power capability but larger footprint and inferior thermal path; lacks leakage tuning for noise-critical apps	Prefer only if board layout permits SOD-123 and higher dissipation is needed without AEC compliance

Compared with BZX84-C8V2,215 and MMSZ5238BT1G, the BZX8450-C8V2-QVL uniquely combines AEC-Q101 qualification, optimized leakage for low-noise switching, and superior thermal resistance (330 K/W) in SOT23 - making it the only choice for automotive-grade, space-constrained, low-power reference designs.

Availability

BZX8450-C8V2-QVL is available at Aetrix Electronics and suitable for automotive engine control units, cabin sensor modules, portable medical monitoring devices, and industrial IoT telemetry nodes requiring stable component supply across extended temperature and lifecycle demands.

Supply support for BZX8450-C8V2-QVL 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 advanced packaging technologies.

The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage reference and regulation in harsh-environment automotive electronics and portable battery-powered systems.

FAQ

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

The BZX8450-C8V2-QVL has a nominal Zener voltage of 8.2 V at 50 µA, with a guaranteed working range of 7.79 V to 8.61 V (±5 %). Its absolute maximum non-repetitive peak reverse power is 40 W for 100 µs pulses, but continuous reverse voltage must remain within the specified V_Z band to maintain regulation. Exceeding 8.61 V continuously risks thermal runaway due to its 250 mW power limit.

Is pin 2 truly unused, and can it be grounded or left floating on the PCB?

Yes, pin 2 is internally not connected (n.c.) per Table 2 and Figure 9. It must remain electrically floating - neither grounded nor tied to any net. Connecting it may cause unintended parasitic coupling or solder bridging. The SOT23 footprint accommodates this terminal with a non-functional pad, and PCB layout must omit any copper connection to avoid assembly or reliability issues.

How does the "intentional minor rise of leakage current" improve performance?

Per AN90031, the controlled leakage increase in BZX8450-B/C11-Q to -C51-Q variants reduces minority-carrier storage time during switching transitions. This lowers high-frequency noise generation and improves settling time in feedback loops - particularly beneficial in DC-DC converter error amplifiers and fast-response sensor bias circuits where conventional Zeners exhibit ringing or overshoot.

Can this diode replace older BZX84-C8V2 parts in existing designs?

Yes, the BZX8450-C8V2-QVL is a drop-in replacement for BZX84-C8V2 in SOT23 footprints, matching pinout, voltage, and tolerance. However, its AEC-Q101 qualification, lower r_diff (80 Ω vs. 100 Ω), and optimized leakage profile provide measurable improvements in automotive and noise-sensitive applications - requiring no layout change but offering enhanced reliability and signal integrity.

BZX8450-C8V2-QVL Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX8450-Q

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 8.2 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 6.2 V

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

Operating Temperature:: -55°C ~ 150°C (TA)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX8450-C8V2-QVL FAQ

1.How can I place an order for BZX8450-C8V2-QVL through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C8V2-QVL 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-C8V2-QVL reliable?

The price and inventory of BZX8450-C8V2-QVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C8V2-QVL is usually 5 days.

3.What payment methods are accepted for BZX8450-C8V2-QVL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C8V2-QVL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C8V2-QVL?

BZX8450-C8V2-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C8V2-QVL 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-C8V2-QVL?

For technical support, including BZX8450-C8V2-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C8V2-QVL requirements.

6.How does Aetrix verify that BZX8450-C8V2-QVL is sourced from the original manufacturer or authorized distributors?

All BZX8450-C8V2-QVL 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-C8V2-QVL meets industry standards.

7.What is the process for return or replacement of BZX8450-C8V2-QVL?

All BZX8450-C8V2-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C8V2-QVL, 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-C8V2-QVL part is unused and in its original packaging.

Return procedure for BZX8450-C8V2-QVL:

1.Submit a request within 90 days.

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

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