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. BZX8450-C3V0-QVL

Name: BZX8450-C3V0-QVL
Brand: Nexperia USA Inc.
SKU: BZX8450-C3V0-QVL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZX8450-C3V0-QVL

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C3V0-QVL.pdf

Description:: DIODE ZENER 3V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,428

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

Product details

Overview

BZX8450-C3V0-Q 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 3.0 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW power dissipation, and 170 pF capacitance at 0 V - enabling stable operation in low-power sensor interfaces and microcontroller reset circuits.

For engineers reviewing the BZX8450-C3V0-Q datasheet, BZX8450-C3V0-Q pinout, BZX8450-C3V0-Q application, or BZX8450-C3V0-Q equivalent, key selection criteria include its AEC-Q101 qualification, low-leakage optimized C-series construction, 0.8 µA max reverse current at 3.0 V, and thermal resistance of 330 K/W to solder point - critical for thermally constrained PCB layouts in automotive ECUs and battery-powered IoT nodes.

Technical Context

This device operates as a two-terminal shunt voltage regulator, maintaining a stable 3.0 V output across load variations by conducting reverse current above its breakdown threshold. Its differential resistance is ≤600 Ω at 50 µA and ≤100 Ω at 5 mA, supporting predictable dynamic response in feedback paths.

The C-series variant features intentional minor leakage rise per AN90031 to reduce switching noise and improve transient immunity. With a temperature coefficient of −3.5 mV/K and junction-to-ambient thermal resistance of 500 K/W (FR4, single-sided), it maintains regulation stability over −55 °C to +150 °C ambient range.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	3.0 V (min 2.85 V, max 3.15 V at I_Z = 50 µA) - defines precise reference level for low-current bias networks
Tolerance	±5 % - enables cost-effective selection where tight regulation is secondary to robustness and leakage control
Reverse Current (I_R)	≤0.8 µA at V_R = 3.0 V - ensures minimal quiescent drain in always-on battery circuits
Capacitance (C_d)	170 pF at V_R = 0 V, f = 1 MHz - limits high-frequency noise coupling in analog signal chains
Power Dissipation	250 mW at T_amb ≤ 25 °C (FR4, single-sided copper) - sets maximum continuous bias current to ~83 mA at 3 V
Junction Temperature	150 °C max - supports operation in under-hood automotive environments without derating below 125 °C ambient
AEC-Q101 Qualified	Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard

Pinout & Package

SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, tin-plated terminations. Mounting per IPC-7095 guidelines with reflow footprint per Figure 10.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node in shunt regulation configuration
2	Not Connected (n.c.)	Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress
3	Cathode (K)	Zener breakdown terminal; connects to regulated voltage rail and current-limiting resistor

Key Features

Feature	Design Value
Low-test-current regulation	Specified at 50 µA - enables use in µA-level bias networks without external amplification
Optimized leakage profile	C-series intentional minor leakage rise - reduces switching transients and improves noise immunity in digital interface rails
Automotive qualification	AEC-Q101 compliant - qualified for engine control, body electronics, and ADAS subsystems requiring extended lifetime and thermal resilience
Thermal performance	R_th(j-sp) = 330 K/W - enables direct thermal path to PCB copper pour for sustained 150 °C junction operation
Small-footprint packaging	SOT23 outline with 1.9 mm pitch - supports high-density routing in space-constrained modules like TPMS and smart sensors

Applications

Automotive Sensor Biasing

Microcontroller Reset Circuit

Use Scenario: Providing stable 3.0 V reference to analog front-end of pressure/temperature sensors in engine bay modules.

IC Role / Device Role / Timing Role: Shunt voltage regulator establishing fixed bias point for sensor excitation and ADC reference scaling.

Use Value: AEC-Q101 qualification and −55 °C to +150 °C operation ensure functional integrity during thermal cycling; 0.8 µA leakage minimizes battery drain in always-on monitoring.

Use Scenario: Generating clean, noise-immune reset signal for ARM Cortex-M0+ microcontrollers in telematics units.

IC Role / Device Role / Timing Role: Zener-based reset supervisor element, clamping reset line until supply stabilizes at ≥3.0 V.

Use Value: C-series leakage optimization suppresses switching noise from nearby DC-DC converters; 170 pF capacitance avoids false triggering during fast-rising V_CC.

Portable Battery Monitoring

Industrial Signal Conditioning

Use Scenario: Reference voltage source for coulomb counter ICs in Li-ion battery packs for wearables and medical devices.

IC Role / Device Role / Timing Role: Precision shunt regulator supplying known voltage to current-sense amplifier gain-setting network.

Use Value: 3.0 V ±5 % tolerance and low 50 µA test current enable accurate charge-state estimation with sub-1% error over full battery discharge curve.

Use Scenario: Voltage clamp in 4–20 mA transmitter loop-powered sensor front-ends operating in harsh factory environments.

IC Role / Device Role / Timing Role: Overvoltage protection and rail stabilization element tied to 24 V loop supply with series current-limiting resistor.

Use Value: 250 mW power rating allows safe dissipation during 30 V transients; 150 °C junction rating ensures reliability in unventilated enclosures near motors or drives.

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-C3V0,115	Same 3.0 V, ±5 %, SOT23 package but non-AEC-Q101; higher typical leakage (1.0 µA vs. 0.8 µA max)	Approved for industrial/commercial use only; not validated for automotive temperature cycling or humidity testing	Select when cost sensitivity outweighs automotive qualification requirements and leakage margin is acceptable
MMSZ4684T1G	3.0 V, ±5 %, SOD-123 package; 500 mW P_tot; r_diff ≤ 100 Ω at 5 mA (vs. ≤100 Ω for BZX8450-C3V0-Q)	Larger footprint and higher power handling; lacks C-series noise-optimized leakage profile	Choose for higher-power biasing where board space permits SOD-123 and thermal mass reduces peak junction temperature

Compared with BZX84-C3V0,115, the BZX8450-C3V0-Q adds AEC-Q101 validation and tighter leakage control for automotive safety-critical biasing; versus MMSZ4684T1G, it trades power capacity for smaller SOT23 size and application-specific noise reduction - making it optimal for space- and EMI-constrained automotive sensor nodes.

Availability

BZX8450-C3V0-Q is available at Aetrix Electronics and suitable for automotive sensor biasing, microcontroller reset circuits, portable battery monitoring, and industrial signal conditioning requiring stable component supply across production lifecycles.

Supply support for BZX8450-C3V0-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 mobile markets.

The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, noise-sensitive voltage regulation in automotive electronics and portable systems demanding long-term stability and thermal resilience.

FAQ

What is the maximum reverse current specification for BZX8450-C3V0-Q at its rated Zener voltage?

The maximum reverse current (I_R) is 0.8 µA at V_R = 3.0 V and T_j = 25 °C, as specified in Table 8 of the datasheet. This value reflects the C-series' intentional minor leakage rise for noise reduction while maintaining ultra-low standby consumption - critical for battery-backed systems where microampere-level leakage directly impacts service life.

How does the BZX8450-C3V0-Q differ from the BZX8450-B3V0-Q variant?

The BZX8450-C3V0-Q has a wider voltage tolerance (±5 %, 2.85–3.15 V) and incorporates intentional minor leakage rise per AN90031 to improve switching noise immunity and transient response. In contrast, the B-series offers tighter ±2 % tolerance (2.94–3.06 V) and lower baseline leakage, prioritizing precision over noise suppression - making the C-variant preferred for digital interface rails and reset circuits.

Can BZX8450-C3V0-Q be used in place of a standard 3.3 V Zener diode?

No - BZX8450-C3V0-Q is rated for 3.0 V nominal Zener voltage (2.85–3.15 V), not 3.3 V. Substituting it for a 3.3 V part would result in undershoot of the target regulation level by ~0.3 V, potentially causing logic-level incompatibility or insufficient bias headroom. For 3.3 V applications, BZX8450-C3V3-Q (3.13–3.47 V) is the correct C-series variant.

What is the thermal resistance from junction to solder point, and why does it matter in PCB layout?

R_th(j-sp) is 330 K/W, measured from junction to cathode solder point. This parameter quantifies how effectively heat flows from the silicon die into the PCB copper via the cathode pad. A lower value enables higher continuous power dissipation without exceeding 150 °C junction temperature - guiding designers to maximize cathode-side copper area and thermal vias, especially in automotive modules lacking active cooling.

BZX8450-C3V0-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):: 3 V

Tolerance:: ±5%

Power - Max:: 250 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:: -55°C ~ 150°C (TA)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX8450-C3V0-QVL FAQ

1.How can I place an order for BZX8450-C3V0-QVL through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C3V0-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-C3V0-QVL reliable?

The price and inventory of BZX8450-C3V0-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-C3V0-QVL is usually 5 days.

3.What payment methods are accepted for BZX8450-C3V0-QVL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C3V0-QVL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C3V0-QVL?

BZX8450-C3V0-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C3V0-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-C3V0-QVL?

For technical support, including BZX8450-C3V0-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C3V0-QVL requirements.

6.How does Aetrix verify that BZX8450-C3V0-QVL is sourced from the original manufacturer or authorized distributors?

All BZX8450-C3V0-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-C3V0-QVL meets industry standards.

7.What is the process for return or replacement of BZX8450-C3V0-QVL?

All BZX8450-C3V0-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C3V0-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-C3V0-QVL part is unused and in its original packaging.

Return procedure for BZX8450-C3V0-QVL:

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…