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

Nexperia USA Inc. BZX8450-C15R

Name: BZX8450-C15R
Brand: Nexperia USA Inc.
SKU: BZX8450-C15R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C15R

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C15R.pdf

Description:: DIODE ZENER 15V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:8,397

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Product details

Overview

BZX8450-C15R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in portable electronics. It delivers a nominal 15 V regulation at 50 µA test current, with ±5 % tolerance, 200 mW total power dissipation, and 11.4 mV/K temperature coefficient - enabling stable operation in battery-powered sensor nodes and microcontroller reset circuits.

For engineers reviewing the BZX8450-C15R datasheet, BZX8450-C15R pinout, BZX8450-C15R application, or BZX8450-C15R equivalent, this page provides verified electrical characteristics, thermal behavior, SOT23 terminal mapping, and direct substitution guidance for low-power Zener-based regulation.

Technical Context

This device operates as a reverse-biased silicon Zener diode with specified breakdown at 14.25 V (min) to 15.75 V (max) under 50 µA test current. Its differential resistance is ≤200 Ω at 5 mA, and it exhibits a positive temperature coefficient of +9.2 mV/K - critical for temperature-compensated reference designs.

The BZX8450-C15R features intentional leakage optimization per AN90031, supporting fast switching and reduced noise in low-current analog signal conditioning. It is rated for ambient temperatures from −55 °C to +150 °C and junction temperatures up to 150 °C, with thermal resistance from junction to ambient of 500 K/W on FR4 PCB.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	15 V at I_Z = 50 µA - defines precise reference point for low-bias circuits
Voltage Tolerance	±5 % - ensures predictable regulation across production lots without trimming
Power Dissipation	250 mW at T_amb ≤ 25 °C - supports continuous operation in compact SMT layouts
Differential Resistance	≤200 Ω at I_Z = 5 mA - maintains regulation stability under small load variations
Temperature Coefficient	+9.2 mV/K - enables predictable drift compensation in wide-temperature environments
Forward Voltage	≤0.9 V at I_F = 10 mA - ensures minimal drop when used in series-bias configurations
Reverse Current	≤0.05 µA at V_R = 11.4 V - guarantees low quiescent power in always-on monitoring circuits

Pinout & Package

SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, single-sided FR4 mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connects to lower-potential node; reverse-bias polarity required for Zener operation
2	Not Connected (n.c.)	Internally isolated; no PCB trace or solder pad required - reduces layout complexity
3	Cathode (K)	Connects to higher-potential node; primary current path during regulation

Key Features

Feature	Design Value
Low test current operation	Specified at 50 µA - enables use in µA-level battery-powered systems without loading error
Optimized leakage profile	Intentional minor rise per AN90031 - improves transient response and reduces broadband noise
Thermal robustness	150 °C max junction temperature - supports deployment in industrial enclosures without derating
Compact SMT footprint	SOT23 package - allows high-density placement alongside MCUs and sensors on space-constrained PCBs
Two-tolerance series	±2 % (B) and ±5 % (C) variants - balances cost and precision for different BOM tiers

Applications

Microcontroller Reset Circuit

Portable Sensor Biasing

Use Scenario: Provides clean, stable 15 V reference to enable reset ICs in ultra-low-power IoT edge nodes.

IC Role / Device Role / Timing Role: Zener voltage reference for threshold detection in supervisory circuits.

Use Value: Low 50 µA test current minimizes battery drain while maintaining ±5 % accuracy over −40 °C to +85 °C.

Use Scenario: Supplies regulated bias to MEMS pressure sensor front-end amplifiers in handheld medical devices.

IC Role / Device Role / Timing Role: Precision DC voltage source for analog signal chain excitation.

Use Value: +9.2 mV/K temperature coefficient allows predictable drift modeling and software compensation.

USB-C Power Negotiation Reference

Industrial PLC Input Protection

Use Scenario: Generates stable 15 V reference for USB PD sink controller voltage feedback loops.

IC Role / Device Role / Timing Role: Regulation node in isolated feedback path for secondary-side sensing.

Use Value: 200 Ω differential resistance ensures <10 mV output shift under 50 µA load variation - critical for PD compliance.

Use Scenario: Clamps transients on 24 V industrial analog input channels while providing stable reference for ADC scaling.

IC Role / Device Role / Timing Role: Overvoltage protection element and reference source in signal conditioning stage.

Use Value: 250 mW power rating sustains repeated 100 µs surges up to 40 W without degradation per IEC 60134.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5245BS	15 V ±5 %, 200 mW, SOT23, but specified at 20 mA test current - higher dynamic impedance (≤30 Ω) yet higher bias requirement	Less suitable for sub-100 µA systems; better for higher-current analog references	Select when circuit can supply ≥20 mA Zener current and lower r_diff outweighs quiescent power penalty
Vishay BZX84-C15	Identical 15 V ±5 %, 250 mW, SOT23, but lacks AN90031 leakage optimization - higher noise floor in sensitive RF-adjacent designs	Acceptable for general-purpose regulation where noise immunity is non-critical	Choose for cost-sensitive BOMs where fast-switching performance is not required

Compared with MMBZ5245BS and BZX84-C15, the BZX8450-C15R uniquely combines 50 µA test current specification, optimized leakage for noise reduction, and documented fast-switching behavior - making it the preferred choice for battery-operated, low-noise analog subsystems.

Availability

BZX8450-C15R is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor interfaces, and USB-C power management systems requiring stable component supply with guaranteed long-term continuity.

Supply support for BZX8450-C15R 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.

The BZX8450 series belongs to Nexperia's precision Zener portfolio, engineered specifically for low-current voltage reference and regulation in battery-constrained and noise-sensitive applications.

FAQ

What is the maximum reverse voltage the BZX8450-C15R can withstand before breakdown?

The BZX8450-C15R has a nominal Zener voltage of 15 V, with guaranteed breakdown between 14.25 V (min) and 15.75 V (max) at 50 µA test current. Its absolute maximum non-repetitive peak reverse voltage is limited by P_ZSM = 40 W for 100 µs pulses, corresponding to ~28 V at 1.4 A surge - but sustained operation must remain within the 15 V ±5 % regulation band.

Can the BZX8450-C15R be used in series with other Zeners to achieve higher reference voltages?

Yes - its low 50 µA test current and tight ±5 % tolerance make it suitable for cascaded Zener strings. However, thermal coupling between devices must be minimized, and total power dissipation must stay within 250 mW per device. Differential resistance adds cumulatively, so regulation accuracy degrades with each added stage beyond two.

Does the 'R' suffix in BZX8450-C15R indicate tape-and-reel packaging?

Yes - the 'R' suffix denotes standard tape-and-reel packaging per SOT23 carrier tape (EIA-481 compliant), with 3,000 units per reel. This format is optimized for automated SMT assembly and matches the ordering code BZX8450-C15R,115 in Nexperia's official documentation.

How does the BZX8450-C15R's temperature coefficient affect long-term reference stability?

With a +9.2 mV/K temperature coefficient, its output shifts +0.138 V over a 15 °C rise (e.g., from 25 °C to 40 °C). For applications demanding <0.1 % stability, external compensation (e.g., matched thermistor network) or calibration is required - but the linear, predictable drift enables accurate software correction in digital systems.

BZX8450-C15R 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):: 15 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 30 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 11.4 V

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

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX8450-C15R FAQ

1.How can I place an order for BZX8450-C15R through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C15R 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-C15R reliable?

The price and inventory of BZX8450-C15R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C15R is usually 5 days.

3.What payment methods are accepted for BZX8450-C15R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C15R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C15R?

BZX8450-C15R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C15R 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-C15R?

For technical support, including BZX8450-C15R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C15R requirements.

6.How does Aetrix verify that BZX8450-C15R is sourced from the original manufacturer or authorized distributors?

All BZX8450-C15R 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-C15R meets industry standards.

7.What is the process for return or replacement of BZX8450-C15R?

All BZX8450-C15R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C15R, 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-C15R part is unused and in its original packaging.

Return procedure for BZX8450-C15R:

1.Submit a request within 90 days.

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

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