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

Nexperia USA Inc. BZX8450-B15-QR

Name: BZX8450-B15-QR
Brand: Nexperia USA Inc.
SKU: BZX8450-B15-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-B15-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-B15-QR.pdf

Description:: DIODE ZENER 15V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:2,020

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Product details

Overview

BZX8450-B15-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 15 V nominal working voltage at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive use.

For engineers reviewing the BZX8450-B15-QR datasheet, BZX8450-B15-QR pinout, BZX8450-B15-QR application, or BZX8450-B15-QR equivalent, this device serves precision low-bias regulation in battery-powered sensors, ECU reference rails, and portable instrumentation where leakage-sensitive, stable 15 V clamping is required.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified V_Z of 14.7 V to 15.3 V at I_Z = 50 µA, exhibiting a temperature coefficient of +9.2 mV/K and differential resistance of 200 Ω at I_Z = 5 mA. Its low 50 µA test current enables minimal quiescent bias draw.

The device features intentional minor leakage current optimization per AN90031 for fast switching transients and reduced noise, and is qualified to AEC-Q101 for operation across −55 °C to +150 °C ambient range with 150 °C maximum junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	15 V (14.7 V to 15.3 V at 50 µA; enables precise 15 V rail clamping)
Tolerance	±2 % (B-series tight tolerance supports high-accuracy reference designs)
Power Dissipation	250 mW (max at T_amb ≤ 25 °C on FR4 PCB; defines safe continuous operating envelope)
Test Current	50 µA (low bias point ideal for battery-critical applications)
Forward Voltage	0.9 V max at 10 mA (ensures predictable turn-on behavior in series protection configurations)
Reverse Leakage	0.05 µA max at V_R = 11.4 V (ultra-low leakage preserves signal integrity in high-impedance nodes)
Thermal Resistance	500 K/W (junction-to-ambient, free air; informs derating for elevated ambient temps)

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connects to lower-potential side in reverse-biased Zener configuration; must be held at lower voltage than cathode for regulation
2	Not Connected (n.c.)	Internally unconnected; no electrical function; must remain floating or grounded per layout best practice
3	Cathode (K)	Connects to higher-potential side; defines Zener breakdown direction and sets regulated output node

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive underhood and control module environments (−55 °C to +150 °C)
Low 50 µA test current	Enables <1 µA standby current in voltage reference circuits without compromising regulation accuracy
Optimized leakage profile	Intentional minor IR rise per AN90031 improves transient response and reduces broadband noise in sensing paths
±2 % voltage tolerance (B-series)	Supports tighter regulation margins in feedback loops and analog front-end references
200 Ω dynamic impedance at 5 mA	Ensures stable output under small-signal load variations typical in sensor biasing and ADC reference buffers

Applications

Automotive Engine Control Unit (ECU) Reference Rail

Portable Medical Sensor Bias Supply

Use Scenario: Provides stable 15 V reference for microcontroller ADC and op-amp biasing in engine management modules exposed to wide thermal cycling.

IC Role / Device Role / Timing Role: Zener voltage regulator establishing fixed reference potential for analog signal conditioning and power monitoring circuits.

Use Value: AEC-Q101 qualification ensures reliability over 150 °C junction temperature; ±2 % tolerance maintains ADC linearity within 0.5 LSB error budget.

Use Scenario: Supplies low-noise 15 V bias to MEMS pressure sensor amplifiers in handheld diagnostic devices powered by coin-cell batteries.

IC Role / Device Role / Timing Role: Low-current Zener shunt regulator delivering stable excitation voltage with sub-µA quiescent draw.

Use Value: 50 µA test current and optimized leakage reduce total system current by >12 µA versus standard Zeners, extending battery life by 18%.

Industrial IoT Node Power Supervisor

Automotive Cabin Camera Power Clamp

Use Scenario: Clamps 15 V supply rail against transients in battery-backed wireless sensor nodes deployed in factory automation systems.

IC Role / Device Role / Timing Role: Overvoltage protection element absorbing surge energy while maintaining regulation during brownout recovery.

Use Value: 250 mW power rating and 40 W non-repetitive peak dissipation (100 µs) handle CAN bus-induced spikes without latch-up.

Use Scenario: Stabilizes 15 V camera module input in ADAS rear-view systems subject to load-dump events and cold-crank voltage dips.

IC Role / Device Role / Timing Role: Precision Zener clamp referenced to ground, protecting image sensor and ISP power inputs from overvoltage.

Use Value: +9.2 mV/K temperature coefficient compensates for thermal drift in camera analog front-end, reducing gain error to <0.3% over −40 °C to +85 °C.

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-C15	±5 % tolerance, no AEC-Q101 qualification, 600 Ω r_diff at 5 mA	General-purpose industrial use only; unsuitable for automotive or high-accuracy references	Select when cost sensitivity outweighs precision and qualification requirements
MMSZ5245B	±5 % tolerance, 500 mW P_tot, 17 Ω r_diff at 20 mA, SOD-123 package	Higher power handling but larger footprint; requires ≥20 mA test current	Choose for higher-current regulation where board space permits and tighter dynamic impedance is critical

Compared with BZX8450-B15-QR, BZX84-C15 trades accuracy and automotive compliance for lower cost, while MMSZ5245B offers lower impedance at higher bias but lacks AEC-Q101 and demands more quiescent current-making the BZX8450-B15-QR optimal for low-power, qualified automotive reference designs.

Availability

BZX8450-B15-QR is available at Aetrix Electronics and suitable for automotive ECU design, portable medical instrumentation, industrial IoT sensor nodes, and ADAS camera power supervision requiring stable component supply and long-term lifecycle continuity.

Supply support for BZX8450-B15-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, delivering high-performance logic, discrete, and MOSFET solutions with emphasis on automotive and industrial reliability.

The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for low-current, low-noise, and thermally robust voltage reference and clamping in automotive electronics and portable systems.

FAQ

What is the maximum reverse voltage before breakdown for BZX8450-B15-QR?

The BZX8450-B15-QR has a nominal Zener voltage of 15 V with a guaranteed range of 14.7 V to 15.3 V at 50 µA test current. Breakdown begins within this band; it does not have a separate "maximum reverse voltage" rating-operation above 15.3 V at rated current risks exceeding power limits or thermal stress.

Can BZX8450-B15-QR replace a standard 1N4744A in a circuit?

No-BZX8450-B15-QR is not a drop-in replacement for 1N4744A. It operates at 50 µA (vs. 1N4744A's 21 mA), has 250 mW power rating (vs. 1W), uses SOT23 (vs. DO-41), and exhibits different dynamic impedance (200 Ω vs. ~15 Ω). Circuit redesign is required to accommodate its low-current, low-power, surface-mount characteristics.

Is the n.c. pin (Pin 2) required to be grounded or left floating?

Pin 2 is internally not connected and must remain electrically floating. Grounding it provides no benefit and may risk unintended coupling or solder bridging; PCB layout should isolate this pad or omit copper entirely per Nexperia's SOT23 footprint recommendations.

How does the +9.2 mV/K temperature coefficient affect regulation stability?

The +9.2 mV/K coefficient means output voltage increases by ~0.14 V over a 15 °C rise (e.g., from 25 °C to 40 °C). In precision references, this drift must be compensated via circuit topology (e.g., complementary Zener/forward diode pairs) or calibrated out in firmware-especially critical in automotive cabin temperature ranges.

BZX8450-B15-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):: 15 V

Tolerance:: ±2%

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:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX8450-B15-QR FAQ

1.How can I place an order for BZX8450-B15-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-B15-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-B15-QR reliable?

The price and inventory of BZX8450-B15-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-B15-QR is usually 5 days.

3.What payment methods are accepted for BZX8450-B15-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B15-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-B15-QR?

BZX8450-B15-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-B15-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-B15-QR?

For technical support, including BZX8450-B15-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B15-QR requirements.

6.How does Aetrix verify that BZX8450-B15-QR is sourced from the original manufacturer or authorized distributors?

All BZX8450-B15-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-B15-QR meets industry standards.

7.What is the process for return or replacement of BZX8450-B15-QR?

All BZX8450-B15-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B15-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-B15-QR part is unused and in its original packaging.

Return procedure for BZX8450-B15-QR:

1.Submit a request within 90 days.

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

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