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

Nexperia USA Inc. BZX8450-C2V0-QR

Name: BZX8450-C2V0-QR
Brand: Nexperia USA Inc.
SKU: BZX8450-C2V0-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C2V0-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C2V0-QR.pdf

Description:: DIODE ZENER 2V 250MW TO236AB

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Product details

Overview

BZX8450-C2V0-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 2.0 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and qualified AEC-Q101 automotive reliability.

For engineers reviewing the BZX8450-C2V0-Q datasheet, BZX8450-C2V0-Q pinout, BZX8450-C2V0-Q application, or BZX8450-C2V0-Q equivalent, this page provides verified electrical characteristics, thermal behavior, automotive qualification status, and real-world use cases in portable and automotive subsystems.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 1.88 V to 2.12 V at I_Z = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance ≤600 Ω at 5 mA. Its low leakage (≤1.0 µA at V_R = 1.0 V) supports stable operation in ultra-low-power circuits.

Designed for surface-mount use on FR4 PCBs with single-sided 70 µm copper, it features R_th(j-a) = 500 K/W and R_th(j-sp) = 330 K/W, enabling thermal management in compact layouts. The intentional minor rise in leakage current improves switching speed and noise reduction per AN90031.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	2.0 V at I_Z = 50 µA - precise low-voltage reference for sensor biasing and microcontroller reset circuits
Voltage Tolerance	±5 % - tighter than standard 10 % Zeners, enabling accurate analog signal conditioning without trimming
Max Power Dissipation	250 mW at T_amb ≤ 25 °C - sufficient for continuous low-current regulation in space-constrained PCBs
Forward Voltage	≤ 0.9 V at I_F = 10 mA - ensures minimal forward conduction loss during transient polarity events
Junction Temperature	−55 °C to +150 °C - supports operation across full automotive ambient range including under-hood environments
AEC-Q101 Qualified	Yes - validated for automotive discrete semiconductor stress testing, including HTRB, HTSL, and temperature cycling
Reverse Leakage Current	≤1.0 µA at V_R = 1.0 V - enables reliable low-power sleep-mode voltage monitoring in IoT endpoints

Pinout & Package

SOT23 plastic surface-mounted package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, 3-terminal configuration with anode (Pin 1), not-connected (Pin 2), and cathode (Pin 3).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connected to lower-potential node; reverse-biased during regulation; must be routed with low-impedance path to ground reference
2	Not Connected (n.c.)	Internally unconnected; no PCB trace or solder joint required; must remain floating per design intent
3	Cathode (K)	Connected to higher-potential node; carries regulated output current; serves as thermal path to PCB solder point (R_th(j-sp) = 330 K/W)

Key Features

Feature	Design Value
Low Test Current Operation	Specified at 50 µA - enables stable regulation in micropower applications where supply current is limited to <100 µA
Optimized Leakage Profile	Intentional minor rise in IR - reduces switching transients and broadband noise in ADC reference and PLL supply rails
Automotive Qualification	AEC-Q101 compliant - meets vibration, thermal shock, and humidity requirements for engine control, body electronics, and infotainment modules
Thermal Performance	R_th(j-sp) = 330 K/W - allows direct heat transfer from junction to solder point, improving long-term reliability in sealed enclosures
Small-Signal Stability	C_d = 220 pF at V_R = 0 V, f = 1 MHz - minimizes capacitive loading on high-impedance feedback nodes in op-amp references

Applications

Automotive Cabin Sensors

Portable Medical Monitors

Use Scenario: Supplying stable 2.0 V bias to MEMS pressure sensors in HVAC control modules.

IC Role / Device Role / Timing Role: Zener voltage reference providing fixed reference for ratiometric ADC conversion.

Use Value: ±5 % tolerance and −3.5 mV/K TC ensure <±1.5 % total error over −40 °C to +125 °C, meeting ASIL-B functional safety margin.

Use Scenario: Generating precision reference for ECG front-end instrumentation amplifiers in handheld monitors.

IC Role / Device Role / Timing Role: Low-noise voltage clamp stabilizing gain-setting resistors and filter cutoff frequencies.

Use Value: Optimized leakage profile suppresses 1/f noise in sub-10 Hz biopotential bands, preserving diagnostic SNR >95 dB.

Industrial IoT Edge Nodes

Smart Meter Battery Backup Circuits

Use Scenario: Regulating 2.0 V rail for LoRaWAN transceiver sleep-state logic and crystal oscillator bias.

IC Role / Device Role / Timing Role: Low-quiescent regulator maintaining timing accuracy and RF startup consistency during 10-year battery life.

Use Value: 50 µA test current and ≤1.0 µA leakage at 1.0 V enable >15-year shelf life and <2 nA standby drain in coin-cell designs.

Use Scenario: Providing fail-safe 2.0 V reference for RTC and nonvolatile memory during main power loss.

IC Role / Device Role / Timing Role: Voltage supervisor reference ensuring accurate timekeeping and data retention during brownout conditions.

Use Value: Stable 2.0 V output with <0.5 % drift over 10-year aging enables ±2 ppm RTC accuracy without periodic calibration.

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-C2V0,215 (Nexperia)	Same 2.0 V, ±5 %, SOT23, but not AEC-Q101 qualified; higher typical leakage (2.0 µA vs. 1.0 µA)	Acceptable for consumer-grade portable devices; unsuitable for automotive or industrial field-deployed equipment	Select when cost sensitivity outweighs automotive qualification and ultra-low-leakage requirements
MMSZ4678T1G (onsemi)	2.0 V, ±5 %, SOD-123 package; 300 mW P_tot; R_th(j-a) = 430 K/W; no AEC-Q101 documentation available	Higher power handling but larger footprint; lacks documented automotive qualification and optimized leakage profile	Prefer only if board layout permits SOD-123 and thermal budget exceeds 300 mW at 25 °C ambient

Compared with BZX8450-C2V0-Q, the BZX84-C2V0,215 sacrifices automotive qualification and leakage performance for lower unit cost, while MMSZ4678T1G trades package size and qualification certainty for higher power headroom-neither matches the combined low-leakage, AEC-Q101, and SOT23 miniaturization of the BZX8450-Q series.

Availability

BZX8450-C2V0-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial IoT edge nodes, and smart meter battery backup circuits requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for BZX8450-C2V0-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, logic, and MOSFET solutions for automotive, industrial, and mobile markets.

The BZX8450-Q series belongs to Nexperia's automotive-qualified Zener diode portfolio, engineered specifically for low-current, low-noise voltage reference and regulation in battery-sensitive and thermally constrained automotive subsystems.

FAQ

What is the maximum reverse voltage that can be safely applied before breakdown?

The BZX8450-C2V0-Q has a nominal Zener voltage of 2.0 V with guaranteed minimum and maximum values of 1.88 V and 2.12 V at I_Z = 50 µA. Breakdown begins within this band; applying >2.12 V continuously risks exceeding rated power dissipation unless current is strictly limited by external series resistance to maintain P_Z ≤ 250 mW.

Is Pin 2 electrically isolated or internally bonded?

Pin 2 is explicitly designated "not connected" (n.c.) in the official Nexperia pinning diagram and package outline. It is not internally bonded to any die structure and must remain unconnected on the PCB-no trace, pad, or solder joint should be placed at this terminal to avoid mechanical stress or unintended coupling.

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

At 2.0 V nominal, a −3.5 mV/K coefficient yields approximately −0.175 %/°C drift. Over −40 °C to +125 °C (165 K span), total drift is ≤ ±289 mV (±14.5 %), but actual measured variation across production units remains within ±5 % tolerance band due to statistical process control and binning-confirmed in Table 8 of the datasheet.

Can this diode replace a 2.0 V shunt reference IC in precision applications?

No-BZX8450-C2V0-Q is a passive Zener diode with no active regulation circuitry. It lacks the initial accuracy (<0.1 %), low TC (<10 ppm/°C), and dynamic impedance (<1 Ω) of shunt references like TL431 or REF3020. It is appropriate for moderate-accuracy biasing, not precision voltage references demanding <0.5 % total error.

BZX8450-C2V0-QR 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 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 7 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-C2V0-QR FAQ

1.How can I place an order for BZX8450-C2V0-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C2V0-QR 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-C2V0-QR reliable?

The price and inventory of BZX8450-C2V0-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C2V0-QR is usually 5 days.

3.What payment methods are accepted for BZX8450-C2V0-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V0-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C2V0-QR?

BZX8450-C2V0-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C2V0-QR 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-C2V0-QR?

For technical support, including BZX8450-C2V0-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V0-QR requirements.

6.How does Aetrix verify that BZX8450-C2V0-QR is sourced from the original manufacturer or authorized distributors?

All BZX8450-C2V0-QR 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-C2V0-QR meets industry standards.

7.What is the process for return or replacement of BZX8450-C2V0-QR?

All BZX8450-C2V0-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V0-QR, 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-C2V0-QR part is unused and in its original packaging.

Return procedure for BZX8450-C2V0-QR:

1.Submit a request within 90 days.

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

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