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

Nexperia USA Inc. BZX8450-C16-QR

Name: BZX8450-C16-QR
Brand: Nexperia USA Inc.
SKU: BZX8450-C16-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C16-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C16-QR.pdf

Description:: DIODE ZENER 16V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:5,688

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Product details

Overview

BZX8450-C16-QR 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 a nominal 16 V regulation at 50 µA test current, with ±5 % tolerance, 200 mA peak forward current, and 250 mW total power dissipation.

For engineers reviewing the BZX8450-C16-QR datasheet, BZX8450-C16-QR pinout, BZX8450-C16-QR application, or BZX8450-C16-QR equivalent, this device is selected for low-power voltage stabilization where tight thermal drift control, low leakage, and AEC-Q101 qualification are required in space-constrained PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 15.2 V to 16.8 V at I_Z = 50 µA. Its differential resistance is ≤200 Ω at I_Z = 5 mA, and temperature coefficient is +10.4 mV/K - indicating positive drift over temperature, critical for stable reference design across −55 °C to +150 °C ambient range.

It features intentional minor leakage optimization per AN90031 for fast switching and noise reduction, and is qualified to AEC-Q101 for automotive use. The SOT23 package supports reflow and wave soldering with defined footprint dimensions and thermal resistance of 330 K/W (junction-to-solder point).

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	16 V at I_Z = 50 µA - defines primary regulation point for low-bias circuits
Voltage Tolerance	±5 % - ensures predictable clamping within 15.2 V–16.8 V under production variation
Differential Resistance	≤200 Ω at I_Z = 5 mA - limits output impedance impact on load regulation
Temperature Coefficient	+10.4 mV/K - quantifies positive V_Z drift per degree Celsius for thermal error budgeting
Max Forward Voltage	0.9 V at I_F = 10 mA - constrains conduction loss during forward bias or ESD protection paths
Total Power Dissipation	250 mW at T_amb ≤ 25 °C - sets maximum steady-state thermal load on FR4 PCB
Junction Temperature Limit	150 °C - defines absolute thermal ceiling for reliability in automotive under-hood environments

Pinout & Package

The BZX8450-C16-QR is housed in a standard SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated assembly and thermal performance on single-sided FR4 PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward current entry point; connected to lower-potential node in reverse-biased Zener configuration
2	Not Connected (n.c.)	Electrically isolated terminal - must remain unconnected to avoid parasitic coupling or mechanical stress
3	Cathode (K)	Reverse-bias voltage reference node; ties to regulated output or feedback path in shunt regulator topologies

Key Features

Feature	Design Value
Low test current operation	Specified at 50 µA - enables battery-powered systems to maintain regulation with sub-µA quiescent draw
AEC-Q101 qualification	Qualified for automotive applications - guarantees reliability under temperature cycling, humidity, and mechanical shock per discrete semiconductor stress standards
Optimized leakage profile	Intentional minor rise per AN90031 - reduces switching transients and high-frequency noise in sensing and signal conditioning paths
Thermal resistance control	R_th(j-sp) = 330 K/W - enables accurate junction temperature estimation from solder-point measurement in thermal-aware designs

Applications

Automotive Body Control Module

Portable Medical Sensor Bias

Use Scenario: Stabilizing reference voltage for LIN bus transceiver bias and microcontroller ADC reference in door module ECUs.

IC Role / Device Role / Timing Role: Shunt voltage regulator providing 16 V rail for analog front-end ICs and level-shifting circuitry.

Use Value: AEC-Q101 qualification and +10.4 mV/K TC ensure stable sensor readings across −40 °C to +125 °C vehicle operating range.

Use Scenario: Supplying precise bias to low-power op-amps and analog front-ends in handheld pulse oximeters.

IC Role / Device Role / Timing Role: Low-current Zener reference establishing fixed headroom for rail-to-rail input amplifiers.

Use Value: 50 µA test current and 250 mW dissipation allow continuous operation from coin-cell batteries for >2 years.

Industrial IoT Edge Node

Smart Home Smoke Detector

Use Scenario: Regulating auxiliary supply for LoRaWAN transceiver LDO input in battery-backed environmental monitors.

IC Role / Device Role / Timing Role: Voltage clamp protecting downstream regulators from transient overvoltage during battery insertion or ESD events.

Use Value: 200 mA peak forward current and 40 W non-repetitive surge rating enable robust handling of hot-swap surges.

Use Scenario: Providing stable 16 V reference for electrochemical CO sensor excitation in 10-year sealed lithium battery units.

IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant sensor bias despite battery voltage decay from 3.6 V to 2.0 V.

Use Value: ±5 % tolerance and <200 Ω dynamic impedance ensure <1 % reference drift over full battery life and temperature range.

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-C16	Non-AEC-Q101, ±5 % tolerance, same V_Z and package but no automotive qualification	Limited to commercial-grade consumer or industrial equipment without automotive reliability requirements	Select when cost sensitivity outweighs AEC-Q101 compliance and thermal derating margins are relaxed
MMSZ5245B	±5 % tolerance, 16 V nominal, but higher r_diff (≤300 Ω) and no intentional leakage optimization	Suitable for general-purpose regulation but not optimized for low-noise sensor bias or fast-switching contexts	Choose only if footprint compatibility with SOD-123 is acceptable and AN90031 noise reduction is unnecessary

Compared with BZX84-C16 and MMSZ5245B, the BZX8450-C16-QR uniquely combines AEC-Q101 qualification, 330 K/W junction-to-solder-point thermal resistance, and application-specific leakage tuning - making it the sole choice for automotive-qualified, low-noise, thermally constrained Zener references.

Availability

BZX8450-C16-QR is available at Aetrix Electronics and suitable for automotive body control modules, portable medical sensor biasing, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term continuity and traceable sourcing.

Supply support for BZX8450-C16-QR 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 consumer markets.

The BZX8450-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for low-current voltage regulation in space-constrained, thermally demanding environments such as engine control units and battery management subsystems.

FAQ

What is the maximum reverse voltage the BZX8450-C16-QR can sustain before breakdown?

The BZX8450-C16-QR has a nominal Zener voltage of 16 V, with a guaranteed working range of 15.2 V to 16.8 V at I_Z = 50 µA. Its reverse breakdown is sharp and well-defined within this band; operation above 16.8 V under sustained conditions exceeds specification and risks thermal runaway. Absolute maximum reverse voltage is not rated separately - the device is intended for controlled shunt regulation, not overvoltage clamping beyond its V_Z window.

Does the "QR" suffix indicate tape-and-reel packaging?

Yes - the "QR" suffix in BZX8450-C16-QR denotes that the device is supplied in 3,000-unit tape-and-reel format compatible with high-speed SMT placement equipment. This packaging meets EIA-481-D standards and includes moisture-sensitive level (MSL) 1 rating, allowing unlimited floor life at ≤30 °C/60 % RH without dry-pack requirements.

How does the "C" in BZX8450-C16-QR differ from "B" variants like BZX8450-B16-QR?

The "C" denotes ±5 % voltage tolerance (15.2 V–16.8 V), while "B" indicates tighter ±2 % (15.7 V–16.3 V). Additionally, C-series parts feature an intentionally elevated leakage current profile optimized per AN90031 for faster switching transitions and reduced high-frequency noise - a key differentiator for sensor bias and RF-adjacent applications where B-series parts prioritize voltage accuracy over dynamic behavior.

Can BZX8450-C16-QR be used in parallel for higher power dissipation?

No - Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, but even within the 16 V range, slight unit-to-unit V_Z mismatch causes current hogging. Parallel connection leads to thermal instability and premature failure of the lowest-V_Z unit. For higher power, use a single higher-rated Zener or implement active regulation; do not parallel BZX8450-C16-QR devices.

BZX8450-C16-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Voltage - Zener (Nom) (Vz):: 16 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 12.1 V

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

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX8450-C16-QR FAQ

1.How can I place an order for BZX8450-C16-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C16-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-C16-QR reliable?

The price and inventory of BZX8450-C16-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-C16-QR is usually 5 days.

3.What payment methods are accepted for BZX8450-C16-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C16-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C16-QR?

BZX8450-C16-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C16-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-C16-QR?

For technical support, including BZX8450-C16-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C16-QR requirements.

6.How does Aetrix verify that BZX8450-C16-QR is sourced from the original manufacturer or authorized distributors?

All BZX8450-C16-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-C16-QR meets industry standards.

7.What is the process for return or replacement of BZX8450-C16-QR?

All BZX8450-C16-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C16-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-C16-QR part is unused and in its original packaging.

Return procedure for BZX8450-C16-QR:

1.Submit a request within 90 days.

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

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