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

Nexperia USA Inc. BZX8450-C2V4-QVL

Name: BZX8450-C2V4-QVL
Brand: Nexperia USA Inc.
SKU: BZX8450-C2V4-QVL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C2V4-QVL

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C2V4-QVL.pdf

Description:: DIODE ZENER 2.4V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:3,552

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Product details

Overview

BZX8450-C2V4-Q from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in battery-powered systems. It delivers 2.4 V nominal regulation at 50 µA test current, with ±5 % tolerance, 200 mA peak forward current capability, and AEC-Q101 qualification for automotive use.

For engineers reviewing the BZX8450-C2V4-Q datasheet, BZX8450-C2V4-Q pinout, BZX8450-C2V4-Q application, or BZX8450-C2V4-Q equivalent, this device is selected for low-quiescent-current voltage stabilization in sensor signal conditioning, microcontroller reset circuits, and automotive body electronics where thermal efficiency and leakage control are critical.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable DC voltage under varying load and temperature conditions. Its specified 50 µA test current enables ultra-low-power operation, while intentional minor leakage rise (per AN90031) improves switching speed and reduces noise in sensitive analog front-ends.

The device features a negative temperature coefficient of −3.5 mV/K and 200 pF capacitance at 0 V, supporting stable performance across −55 °C to +150 °C ambient range. Junction-to-ambient thermal resistance is 500 K/W on standard FR4 PCB, enabling reliable operation without heatsinking in space-constrained designs.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	2.4 V at I_Z = 50 µA - precise low-voltage reference for 3.3 V or 5 V rail monitoring
Tolerance	±5 % - supports cost-sensitive automotive and portable applications without trimming
Differential Resistance	600 Ω max at I_Z = 50 µA - ensures stable regulation under light-load variations
Forward Voltage	0.9 V max at I_F = 10 mA - low conduction loss when used in series-bias configurations
Power Dissipation	250 mW max at T_amb ≤ 25 °C - sufficient for standby regulation in always-on modules
Reverse Current	1.0 µA max at V_R = 1.0 V - minimal leakage preserves battery life in sleep modes
Temperature Coefficient	−3.5 mV/K - predictable drift behavior for compensated reference designs

Pinout & Package

Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), qualified per AEC-Q101 for automotive reliability.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connects to lower-potential node; reverse-biased during regulation
2	Not Connected (n.c.)	Internally unconnected; must remain floating or grounded per layout guidelines
3	Cathode (K)	Connects to higher-potential node; defines regulated output voltage referenced to anode

Key Features

Feature	Design Value
Low test current operation	Specified at 50 µA - enables direct use in µA-level bias networks without active amplification
Optimized leakage profile	Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise in ADC reference paths
AEC-Q101 qualification	Qualified for automotive underhood and cabin applications - meets stress test requirements for vibration, temperature cycling, and HTRB
Thermal robustness	150 °C max junction temperature - supports operation in engine control units and lighting modules

Applications

Automotive Cabin Sensors

Portable Medical Monitors

Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules.

IC Role / Device Role / Timing Role: Zener reference providing stable 2.4 V bias to sensor bridge and op-amp input stage.

Use Value: Enables <1 % full-scale error over −40 °C to +85 °C due to matched TC and low r_diff.

Use Scenario: Low-power reset supervisor for wearable ECG front-end ICs powered by coin cells.

IC Role / Device Role / Timing Role: Regulator supplying clean 2.4 V to supervisor IC's reference input during deep-sleep mode.

Use Value: 1.0 µA max reverse current at 1.0 V ensures >10-year battery life in standby state.

Industrial PLC Input Conditioning

Smart Meter Voltage Monitoring

Use Scenario: Signal-level clamping and biasing for 4–20 mA loop receiver inputs.

IC Role / Device Role / Timing Role: Shunt regulator establishing precise 2.4 V common-mode reference for instrumentation amplifier.

Use Value: 600 Ω differential resistance minimizes gain error drift across 0–70 °C operating range.

Use Scenario: Secondary reference for anti-tampering voltage detection circuitry in electricity meters.

IC Role / Device Role / Timing Role: Zener element in comparator-based overvoltage latch triggered at 2.4 V ±5 %.

Use Value: ±5 % tolerance aligns with IEC 62053-21 accuracy class requirements for auxiliary supply monitoring.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C2V4	Non-AEC-Q101; same SOT23 package and 2.4 V/±5 % spec but lacks automotive qualification and optimized leakage profile	Restricted to commercial-grade consumer or industrial equipment without automotive lifecycle requirements	Select when AEC-Q101 compliance is not required and cost sensitivity outweighs long-term reliability validation
MMSZ4676T1G	2.4 V/±5 %, 500 mW P_tot, 350 Ω r_diff at 5 mA - higher power rating but higher leakage (5 µA at 1 V) and no AEC-Q101	Suitable for higher-current biasing but unsuitable for µA-level battery monitoring due to excessive IR	Choose only if 250 mW dissipation is insufficient and leakage current is not a system constraint

Compared with BZX8450-C2V4-Q, BZX84-C2V4 omits automotive qualification and leakage optimization, while MMSZ4676T1G trades lower r_diff for significantly higher leakage and no automotive support-making the BZX8450-C2V4-Q uniquely suited for AEC-Q101-compliant, ultra-low-I_Q voltage reference roles.

Availability

BZX8450-C2V4-Q is available at Aetrix Electronics and suitable for automotive cabin electronics, portable medical devices, industrial PLC input stages, and smart meter auxiliary monitoring requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for BZX8450-C2V4-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage regulation in automotive and portable electronics where precision, low leakage, and thermal resilience are mandatory.

FAQ

What is the maximum reverse voltage this diode can regulate stably?

The BZX8450-C2V4-Q is rated for stable Zener operation up to its nominal 2.4 V with ±5 % tolerance, meaning it maintains regulation between 2.28 V and 2.52 V at I_Z = 50 µA. It is not intended for higher-voltage regulation; exceeding 2.52 V risks increased temperature-dependent drift and potential instability in low-current bias networks.

Can Pin 2 be tied to ground or left floating in PCB layout?

Pin 2 is internally not connected (n.c.) and must remain electrically floating-neither grounded nor routed to any net. Connecting it may cause unpredictable thermal or electrical behavior due to internal package parasitics; Nexperia's SOT23 layout guidelines explicitly require n.c. pins to be isolated in copper pour and routing.

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

Per application note AN90031, the controlled increase in reverse leakage (e.g., 1.0 µA at 1.0 V vs. sub-µA for standard Zeners) reduces minority-carrier lifetime effects, resulting in faster turn-off response and lower broadband noise-critical for precision ADC references and fast-switching supervisor circuits.

Is this diode suitable for use in a 3.3 V microcontroller reset circuit?

Yes-configured as a shunt regulator with series resistor, it provides a stable 2.4 V reference to a comparator monitoring V_CC. Its −3.5 mV/K temperature coefficient and 600 Ω r_diff ensure reset threshold variation remains within ±1.5 % across −40 °C to +125 °C, meeting typical MCU reset accuracy requirements.

BZX8450-C2V4-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):: 2.4 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 1 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-C2V4-QVL FAQ

1.How can I place an order for BZX8450-C2V4-QVL through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C2V4-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-C2V4-QVL reliable?

The price and inventory of BZX8450-C2V4-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-C2V4-QVL is usually 5 days.

3.What payment methods are accepted for BZX8450-C2V4-QVL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V4-QVL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C2V4-QVL?

BZX8450-C2V4-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C2V4-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-C2V4-QVL?

For technical support, including BZX8450-C2V4-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V4-QVL requirements.

6.How does Aetrix verify that BZX8450-C2V4-QVL is sourced from the original manufacturer or authorized distributors?

All BZX8450-C2V4-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-C2V4-QVL meets industry standards.

7.What is the process for return or replacement of BZX8450-C2V4-QVL?

All BZX8450-C2V4-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V4-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-C2V4-QVL part is unused and in its original packaging.

Return procedure for BZX8450-C2V4-QVL:

1.Submit a request within 90 days.

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

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