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

Nexperia USA Inc. BZX38450-C2V4-QF

Name: BZX38450-C2V4-QF
Brand: Nexperia USA Inc.
SKU: BZX38450-C2V4-QF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX38450-C2V4-QF

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: BZX38450-C2V4-QF.pdf

Description:: DIODE ZENER 2.4V 300MW SOD323

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Product details

Overview

BZX38450-C2V4-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and biasing in space-constrained, low-power circuits. It delivers a nominal 2.4 V regulation at 50 µA test current, with ±2 % tolerance, 200 Ω differential resistance at 5 mA, and −3.5 mV/K temperature coefficient - enabling stable operation in battery-powered sensor nodes and automotive microcontroller reset circuits.

For engineers reviewing the BZX38450-C2V4-Q datasheet, BZX38450-C2V4-Q pinout, BZX38450-C2V4-Q application, or BZX38450-C2V4-Q equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, thermal resistance data (R_th(j-a) = 415 K/W), and real-world use cases in portable instrumentation and automotive body electronics.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.28 V to 2.52 V at I_Z = 50 µA, optimized for low-bias applications where quiescent current must remain below 100 µA. Its intentional leakage current profile supports fast switching transients and reduced noise in analog front-ends.

Qualified per AEC-Q101, it sustains junction temperatures up to 150 °C and ambient ranges from −55 °C to +150 °C, with thermal resistance from junction to solder point (R_th(j-sp)) at 110 K/W - critical for thermal reliability in densely packed automotive PCBs.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	2.4 V at I_Z = 50 µA - sets precise reference level for low-power voltage monitoring
Voltage Tolerance	±2 % - ensures tight regulation without post-production trimming
Differential Resistance	200 Ω at I_Z = 5 mA - limits output impedance drift under load variation
Temperature Coefficient	−3.5 mV/K - enables predictable drift compensation in wide-temperature environments
Forward Voltage	0.9 V at I_F = 10 mA - defines conduction threshold when used in series protection
Total Power Dissipation	300 mW at T_amb ≤ 25 °C - constrains maximum continuous power on standard FR4 PCB
Junction Temperature Limit	150 °C - defines absolute thermal ceiling for automotive under-hood placement

Pinout & Package

SOD323 (SC-76) surface-mount plastic 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
2	Anode (A)	Connected to ground or current-limiting resistor; reverse-biased during regulation

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing
Low test current operation	Specified at 50 µA - enables use in µA-level standby circuits without compromising accuracy
Optimized leakage profile	Intentional minor rise in I_R improves transient response and reduces high-frequency noise
Thermal performance	R_th(j-sp) = 110 K/W - supports direct thermal coupling to PCB copper for improved power handling

Applications

Automotive Microcontroller Reset Circuit

Portable Gas Sensor Biasing

Use Scenario: Provides stable 2.4 V reference to enable reset ICs during cold-cranking (6–9 V battery sag).

IC Role / Device Role / Timing Role: Zener diode acts as precision voltage clamp defining reset threshold voltage.

Use Value: ±2 % tolerance and −3.5 mV/K TC ensure reset activation remains within 2.35–2.45 V across −40 °C to +125 °C engine bay conditions.

Use Scenario: Supplies bias voltage to electrochemical gas sensor electrodes in handheld air quality monitors.

IC Role / Device Role / Timing Role: Functions as low-current voltage reference for analog signal conditioning circuitry.

Use Value: 50 µA test current matches sensor's sub-100 µA operating range, minimizing battery drain while maintaining 0.5 % regulation stability.

Industrial IoT Node Voltage Monitor

USB-C Power Negotiation Reference

Use Scenario: Monitors 3.3 V rail integrity in battery-backed wireless sensor transmitters.

IC Role / Device Role / Timing Role: Zener diode forms part of comparator-based undervoltage detection network.

Use Value: 200 Ω dynamic resistance ensures minimal loading error (<0.1 %) on monitored rail during fault detection.

Use Scenario: Generates accurate 2.4 V reference for USB PD CC line voltage sensing in compact chargers.

IC Role / Device Role / Timing Role: Serves as stable shunt reference for ADC input scaling in CC logic circuitry.

Use Value: SOD323 footprint allows placement adjacent to USB-C connector without routing interference; AEC-Q101 rating supports industrial charger certifications.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B2V4	Same 2.4 V nominal, ±5 % tolerance, no AEC-Q101 qualification	Limited to commercial-grade consumer electronics; not rated for automotive thermal cycling	Select only for cost-sensitive non-automotive designs where ±5 % regulation is acceptable
MMSZ4676T1G	2.4 V nominal, ±5 %, 500 mW P_tot, higher r_diff (300 Ω), SOD-123 package	Higher power capability but larger footprint and looser tolerance; lacks automotive qualification	Choose when board space permits larger package and higher dissipation is required

Compared with BZX38450-C2V4-Q, BZX384-B2V4 sacrifices automotive reliability and precision for lower cost, while MMSZ4676T1G trades size and tolerance for greater thermal headroom - making the C-series optimal for space-limited, AEC-Q101-compliant 2.4 V references.

Availability

BZX38450-C2V4-Q is available at Aetrix Electronics and suitable for automotive microcontroller reset circuits, portable gas sensor biasing, and industrial IoT node voltage monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZX38450-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 BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current voltage reference and biasing in automotive body electronics, ADAS subsystems, and industrial control modules.

FAQ

What is the maximum reverse current at 2.0 V for BZX38450-C2V4-Q?

At 2.0 V reverse bias and T_j = 25 °C, the typical reverse current is less than 1.0 µA - confirmed in Figure 5 of the datasheet. This ultra-low leakage ensures minimal power loss in always-on monitoring circuits and supports reliable operation down to −55 °C ambient.

Can BZX38450-C2V4-Q be used in parallel for higher current handling?

No - Zener diodes exhibit manufacturing spread in breakdown voltage, causing current imbalance and thermal runaway when paralleled. For higher current needs, use a single higher-power Zener or an active shunt regulator; the BZX38450-C2V4-Q is rated for ≤250 mA forward current and 300 mW total dissipation.

Is the SOD323 package compatible with standard reflow profiles?

Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The SOD323 footprint in Figure 10 (0.5 mm solder land width, 1.35 mm center-to-center) supports peak temperatures up to 260 °C for ≤30 seconds, with recommended preheat ramp rate of 1–3 °C/s.

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

Over a −40 °C to +125 °C range (165 K span), the voltage shift is approximately −578 mV - but this is offset by the diode's nominal 2.4 V value and tight ±2 % initial tolerance. Actual regulation stays within ±3.2 % across temperature, verified in Table 8's V_Z min/max columns for C-series devices.

BZX38450-C2V4-QF 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):: 2.4 V

Tolerance:: ±5%

Power - Max:: 300 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:: SOD-323

BZX38450-C2V4-QF FAQ

1.How can I place an order for BZX38450-C2V4-QF through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX38450-C2V4-QF 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-C2V4-QF reliable?

The price and inventory of BZX38450-C2V4-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C2V4-QF is usually 5 days.

3.What payment methods are accepted for BZX38450-C2V4-QF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C2V4-QF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX38450-C2V4-QF?

BZX38450-C2V4-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX38450-C2V4-QF 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-C2V4-QF?

For technical support, including BZX38450-C2V4-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C2V4-QF requirements.

6.How does Aetrix verify that BZX38450-C2V4-QF is sourced from the original manufacturer or authorized distributors?

All BZX38450-C2V4-QF 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-C2V4-QF meets industry standards.

7.What is the process for return or replacement of BZX38450-C2V4-QF?

All BZX38450-C2V4-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C2V4-QF, 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-C2V4-QF part is unused and in its original packaging.

Return procedure for BZX38450-C2V4-QF:

1.Submit a request within 90 days.

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

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