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-B9V1-QR

Name: BZX8450-B9V1-QR
Brand: Nexperia USA Inc.
SKU: BZX8450-B9V1-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZX8450-B9V1-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-B9V1-QR.pdf

Description:: DIODE ZENER 9.1V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,302

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

Product details

Overview

BZX8450-B9V1-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in low-power circuits. It delivers a nominal 9.1 V regulation at 50 µA test current, with ±2 % tolerance, 100 Ω differential resistance at 5 mA, and AEC-Q101 qualification for automotive use.

For engineers reviewing the BZX8450-B9V1-QR datasheet, BZX8450-B9V1-QR pinout, BZX8450-B9V1-QR application, or BZX8450-B9V1-QR equivalent, this page provides verified electrical parameters, thermal behavior, automotive-grade reliability data, and real-world implementation guidance for battery-powered sensor nodes and ECU voltage monitoring circuits.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 8.92 V to 9.28 V at I_Z = 50 µA, exhibiting a temperature coefficient of +3.8 mV/K and diode capacitance of 150 pF at 0 V. Its low 50 µA test current enables stable regulation in micro-power systems where quiescent current must be minimized.

The device features intentional minor leakage current optimization per AN90031 for fast switching transients and reduced noise in feedback paths. Thermal resistance from junction to ambient is 500 K/W on FR4 PCB, supporting operation up to 150 °C junction temperature under defined mounting conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	9.1 V at I_Z = 50 µA - defines precise DC reference point for low-bias analog circuitry
Voltage Tolerance	±2 % (B-series) - ensures tight regulation across production lots without post-assembly trimming
Differential Resistance	100 Ω max at I_Z = 5 mA - limits output impedance drift under load variation in feedback networks
Forward Voltage	0.9 V max at I_F = 10 mA - enables predictable forward conduction during power-up or fault conditions
Total Power Dissipation	250 mW at T_amb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB
Junction Temperature Limit	150 °C - supports operation in under-hood automotive environments without derating
AEC-Q101 Qualified	Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling

Pinout & Package

SOT23 plastic surface-mounted package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided FR4 PCB mount with 70 μm copper.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connects to lower-potential node in reverse-biased Zener configuration; carries reverse leakage and breakdown current
2	Not Connected (n.c.)	Internally unconnected terminal - must remain floating; no PCB trace or solder mask opening required
3	Cathode (K)	Connects to higher-potential node; serves as voltage reference output point in shunt regulator topology

Key Features

Feature	Design Value
Low Test Current Operation	Specified at 50 µA - enables stable regulation in battery-powered systems drawing <100 µA standby current
Optimized Leakage Profile	Intentional minor rise per AN90031 - reduces switching noise and improves transient response in feedback loops
Automotive Qualification	AEC-Q101 compliant - qualified for engine control units, body electronics, and ADAS sensor modules
Tight Voltage Tolerance	±2 % (B-series) - eliminates need for external trimming in precision reference designs
Thermal Robustness	R_th(j-a) = 500 K/W - allows direct integration into thermally constrained modules without heatsinking

Applications

Automotive ECU Reference

Portable Sensor Biasing

Use Scenario: Providing stable 9.1 V reference for ADC input scaling and microcontroller reset threshold in engine control units.

IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for analog front-end circuitry.

Use Value: Maintains ±0.18 V accuracy over temperature (-40 °C to +125 °C) due to +3.8 mV/K TC and AEC-Q101 thermal validation.

Use Scenario: Biasing photodiode amplifiers and MEMS sensor interfaces in wireless IoT nodes powered by coin cells.

IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference enabling <1 µA sleep-mode operation.

Use Value: Draws only 50 µA test current while delivering 9.1 V regulation, extending battery life beyond 10 years in duty-cycled sensors.

Industrial Signal Conditioning

Power Supply Feedback

Use Scenario: Stabilizing op-amp reference inputs in 4–20 mA transmitter circuits operating in harsh factory environments.

IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed reference voltage for current loop calibration.

Use Value: 100 Ω dynamic impedance ensures <0.5 % output deviation under 1 mA load variation, meeting IEC 61000-4 immunity requirements.

Use Scenario: Setting feedback voltage for isolated flyback controllers in medical auxiliary power supplies.

IC Role / Device Role / Timing Role: Secondary-side Zener clamp defining regulated output voltage via optocoupler feedback path.

Use Value: 150 pF capacitance minimizes phase shift in feedback loop, preserving stability margin across 10–100 kHz switching frequencies.

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-C9V1-Q	±5 % tolerance, higher leakage, 110 Ω r_diff at 5 mA	Acceptable for non-critical biasing where cost sensitivity outweighs precision	Select when ±5 % regulation accuracy suffices and AEC-Q101 is not required
MMSZ4687T1G	9.1 V nominal, ±5 %, 1000 mW P_tot, SOD-123 package	Higher power handling but larger footprint and no automotive qualification	Choose only if >250 mW dissipation is needed and board space permits SOD-123

Compared with BZX8450-B9V1-QR, the BZX84-C9V1-Q trades tighter tolerance and automotive qualification for lower unit cost, while MMSZ4687T1G offers higher power capability at the expense of package size and qualification status-neither matches the combination of ±2 % accuracy, 50 µA test current, and AEC-Q101 compliance in SOT23.

Availability

BZX8450-B9V1-QR is available at Aetrix Electronics and suitable for automotive ECU design, portable sensor biasing, industrial signal conditioning, and isolated power supply feedback requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZX8450-B9V1-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 high-volume, high-reliability logic, discrete, and MOSFET devices, with leadership in automotive-qualified components and energy-efficient solutions.

The BZX8450-Q series belongs to Nexperia's automotive-grade Zener regulator portfolio, engineered specifically for low-current voltage reference and biasing in safety-critical and thermally demanding automotive subsystems.

FAQ

What is the maximum reverse current at 9.1 V before breakdown onset?

At 25 °C, the reverse current is ≤0.1 µA when VR = 8.2 V (90 % of nominal VZ), rising to 50 µA at exactly 8.92 V (minimum specified VZ). This sharp knee ensures clean transition into regulation and minimal pre-breakdown leakage in sensing circuits.

Can BZX8450-B9V1-QR replace older BZX84-B9V1 in existing designs?

Yes - it maintains identical electrical specifications, SOT23 pinout, and marking compatibility (%PK), while adding AEC-Q101 qualification and updated thermal characterization per Rev. 3 (2024). No layout or firmware changes are required for drop-in replacement.

How does the "intentional minor rise of leakage current" affect noise performance?

Per AN90031, this controlled leakage profile reduces high-frequency noise spikes during voltage transitions by smoothing carrier injection dynamics, resulting in up to 6 dB lower broadband noise in 10 Hz–1 MHz measurements versus legacy Zeners with abrupt turn-on characteristics.

Is the n.c. pin electrically isolated or internally tied to substrate?

Pin 2 is fully unconnected - no internal bond wire, die attachment, or metallization links it to anode, cathode, or substrate. It must remain unconnected on PCB; soldering or routing to ground or any net will compromise device reliability and AEC-Q101 compliance.

BZX8450-B9V1-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):: 9.1 V

Tolerance:: ±2%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 6.9 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-B9V1-QR FAQ

1.How can I place an order for BZX8450-B9V1-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-B9V1-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-B9V1-QR reliable?

The price and inventory of BZX8450-B9V1-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-B9V1-QR is usually 5 days.

3.What payment methods are accepted for BZX8450-B9V1-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B9V1-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-B9V1-QR?

BZX8450-B9V1-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-B9V1-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-B9V1-QR?

For technical support, including BZX8450-B9V1-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B9V1-QR requirements.

6.How does Aetrix verify that BZX8450-B9V1-QR is sourced from the original manufacturer or authorized distributors?

All BZX8450-B9V1-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-B9V1-QR meets industry standards.

7.What is the process for return or replacement of BZX8450-B9V1-QR?

All BZX8450-B9V1-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B9V1-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-B9V1-QR part is unused and in its original packaging.

Return procedure for BZX8450-B9V1-QR:

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…