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

Nexperia USA Inc. BZX8450-B6V2-QR

Name: BZX8450-B6V2-QR
Brand: Nexperia USA Inc.
SKU: BZX8450-B6V2-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-B6V2-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-B6V2-QR.pdf

Description:: DIODE ZENER 6.2V 250MW TO236AB

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Inventory:2,932

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Product details

Overview

BZX8450-B6V2-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 6.2 V nominal regulation at 50 µA test current, with ±2 % tolerance, 160 Ω dynamic resistance at 5 mA, and AEC-Q101 qualification for under-hood applications.

For engineers reviewing the BZX8450-B6V2-QR datasheet, BZX8450-B6V2-QR pinout, BZX8450-B6V2-QR application, or BZX8450-B6V2-QR equivalent, this page provides verified electrical parameters, thermal behavior, automotive-grade reliability data, and real-world use context for low-power voltage stabilization in battery-supplied systems.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 6.08 V to 6.32 V at I_Z = 50 µA, exhibiting a positive temperature coefficient of +0.4 mV/K - enabling stable reference generation across −55 °C to +150 °C ambient range. Its low 50 µA test current minimizes quiescent power draw in always-on circuits.

The device features intentional leakage optimization per AN90031 for fast switching and reduced noise, with differential resistance dropping to 10 Ω at I_Z = 5 mA. Thermal resistance from junction to solder point is 330 K/W on FR4 PCB, supporting reliable operation up to 150 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	6.2 V (min 6.08 V, max 6.32 V at I_Z = 50 µA) - defines precise reference level for low-bias analog circuits
Tolerance	±2 % (B-series) - enables tight voltage margin control in automotive sensor supply rails
Differential Resistance	160 Ω (max at I_Z = 50 µA); 10 Ω (max at I_Z = 5 mA) - determines regulation stiffness under varying load conditions
Forward Voltage	≤ 0.9 V at I_F = 10 mA - ensures minimal conduction loss when used bidirectionally or in clamp configurations
Power Dissipation	250 mW (T_amb ≤ 25 °C, FR4 PCB) - sets maximum continuous DC power handling without derating
Junction Temperature	−55 °C to +150 °C - supports operation in engine control units and ADAS modules
AEC-Q101 Qualified	Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and TCT

Pinout & Package

Package: 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 high-density PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connects to lower-potential node in reverse-biased Zener configuration; forward conduction path during overvoltage clamping
2	Not Connected (n.c.)	Electrically isolated terminal - must remain unconnected on PCB to avoid parasitic coupling or thermal interference
3	Cathode (K)	Connects to higher-potential node; primary current entry point during Zener breakdown; solder point defines thermal path (R_th(j-sp) = 330 K/W)

Key Features

Feature	Design Value
Low test current operation	Specified at 50 µA - enables microampere-level biasing for ultra-low-power voltage references in IoT sensors
Optimized leakage profile	Intentional minor rise per AN90031 - reduces switching transients and broadband noise in ADC reference supplies
Automotive qualification	AEC-Q101 compliant - qualified for engine management, body control, and infotainment subsystems
Thermal performance	R_th(j-a) = 500 K/W (free air); R_th(j-sp) = 330 K/W - supports thermal-aware layout with localized copper pour under cathode pad
Stable voltage coefficient	+0.4 mV/K at 6.2 V - enables predictable drift compensation in temperature-sensitive analog front-ends

Applications

Automotive Sensor Biasing

Portable Device Reference Supply

Use Scenario: Providing stable 6.2 V reference for MEMS pressure sensor signal conditioning in engine coolant temperature modules.

IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown, delivering regulated bias to op-amp input stages.

Use Value: ±2 % tolerance and +0.4 mV/K TC ensure <±15 mV total drift over −40 °C to +125 °C, meeting ASIL-B sensor accuracy requirements.

Use Scenario: Generating low-quiescent reference for fuel gauge IC in Bluetooth-enabled smart battery packs.

IC Role / Device Role / Timing Role: Low-current Zener regulator supplying reference voltage to coulomb counter ADC, powered by single-cell Li-ion.

Use Value: 50 µA test current enables operation down to 2.7 V supply while maintaining regulation, extending usable battery range by >8% versus standard 5 mA Zeners.

Industrial PLC Input Protection

Medical Wearable Power Monitoring

Use Scenario: Clamping and regulating 24 V DC input signals in programmable logic controller analog input modules.

IC Role / Device Role / Timing Role: Dual-role device: forward conduction limits transient overvoltage; reverse breakdown stabilizes reference for ADC scaling.

Use Value: 0.9 V forward drop at 10 mA and 250 mW power rating allow robust surge handling without external series resistor, reducing BOM count.

Use Scenario: Stabilizing reference voltage for ECG front-end instrumentation amplifier in FDA-cleared wearable monitors.

IC Role / Device Role / Timing Role: Precision Zener reference source for ratiometric measurement, isolated via optocoupler feedback loop.

Use Value: 160 Ω dynamic resistance at 50 µA ensures <0.1 % line regulation error under 10 µA load variation, critical for sub-microvolt signal integrity.

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-C6V2-Q	±5 % tolerance (C-series), 110 Ω r_diff at 5 mA, SZ = +0.4 mV/K - looser initial accuracy but identical thermal behavior	Suitable for non-critical biasing where cost sensitivity outweighs precision; not AEC-Q101 qualified	Select when automotive qualification is unnecessary and ±5 % regulation suffices for system-level calibration
MMSZ5234B-TP	6.2 V ±5 %, 200 mW P_tot, R_th(j-a) = 625 K/W - lower power rating and higher thermal resistance than BZX8450-B6V2-QR	Limited to consumer-grade portable devices due to lack of AEC-Q101 and higher thermal impedance	Choose only for space-constrained consumer designs where automotive reliability and thermal performance are not required

Compared with BZX8450-C6V2-Q and MMSZ5234B-TP, the BZX8450-B6V2-QR offers tighter ±2 % tolerance, AEC-Q101 qualification, and superior thermal resistance (330 K/W vs. ≥625 K/W), making it the sole option for automotive-qualified, thermally constrained, precision reference applications.

Availability

BZX8450-B6V2-QR is available at Aetrix Electronics and suitable for automotive sensor biasing, portable device reference supply, industrial PLC input protection, and medical wearable power monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZX8450-B6V2-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 specializing in high-performance, energy-efficient logic, analog, and discrete components, with leadership in automotive-qualified semiconductors.

The BZX8450-Q series belongs to Nexperia's automotive-grade Zener diode product line, engineered specifically for low-current voltage regulation in harsh-environment applications such as engine control, ADAS, and body electronics.

FAQ

What is the maximum reverse current at 6.2 V before breakdown onset?

At 25 °C, the reverse current (I_R) is ≤1.0 µA when VR = 6.2 V - confirmed in Table 8 for BZX8450-B6V2-Q. This low leakage ensures minimal standby power consumption in always-on automotive modules and extends battery life in portable devices.

Can BZX8450-B6V2-QR be used in parallel for higher power dissipation?

No - Zener diodes exhibit manufacturing spread in breakdown voltage; paralleling causes current hogging and thermal runaway. For >250 mW needs, use a single higher-rated device like PZM13NB or implement active regulation with a transistor-based shunt.

Is pin 2 truly unconnected, or does it serve a mechanical function?

Pin 2 is electrically unconnected (n.c.) per Table 2 and Figure 9. It serves only as a mechanical alignment aid during SMT placement and must not be soldered or routed - doing so risks thermal imbalance and violates the specified R_th(j-sp) value.

How does the +0.4 mV/K temperature coefficient impact long-term stability?

The positive coefficient means output voltage rises ~0.4 mV per °C increase - predictable and linear over −55 °C to +150 °C. In closed-loop systems, this allows accurate software-based compensation; in open-loop references, it contributes <±62 mV total drift across full range, within most automotive sensor specs.

BZX8450-B6V2-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):: 6.2 V

Tolerance:: ±2%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 10 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 5 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-B6V2-QR FAQ

1.How can I place an order for BZX8450-B6V2-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-B6V2-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-B6V2-QR reliable?

The price and inventory of BZX8450-B6V2-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-B6V2-QR is usually 5 days.

3.What payment methods are accepted for BZX8450-B6V2-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B6V2-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-B6V2-QR?

BZX8450-B6V2-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-B6V2-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-B6V2-QR?

For technical support, including BZX8450-B6V2-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B6V2-QR requirements.

6.How does Aetrix verify that BZX8450-B6V2-QR is sourced from the original manufacturer or authorized distributors?

All BZX8450-B6V2-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-B6V2-QR meets industry standards.

7.What is the process for return or replacement of BZX8450-B6V2-QR?

All BZX8450-B6V2-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B6V2-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-B6V2-QR part is unused and in its original packaging.

Return procedure for BZX8450-B6V2-QR:

1.Submit a request within 90 days.

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

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