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

Nexperia USA Inc. BZX8450-C2V7-QR

Name: BZX8450-C2V7-QR
Brand: Nexperia USA Inc.
SKU: BZX8450-C2V7-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C2V7-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C2V7-QR.pdf

Description:: DIODE ZENER 2.7V 250MW TO236AB

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Product details

Overview

BZX8450-C2V7-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 2.7 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive use.

For engineers reviewing the BZX8450-C2V7-QR datasheet, BZX8450-C2V7-QR pinout, BZX8450-C2V7-QR application, or BZX8450-C2V7-QR equivalent, this part serves as a precision low-bias voltage reference in battery-powered sensor interfaces, ECU voltage monitoring circuits, and low-power microcontroller reset supervision where stable 2.7 V clamping under light load is required.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.565 V to 2.835 V at I_Z = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance ≤600 Ω at 5 mA. Its low 50 µA test current enables operation in ultra-low-power systems.

The device features intentional leakage current optimization per AN90031 for fast switching transients and reduced noise, and includes a not-connected (n.c.) terminal (Pin 2) to isolate parasitic capacitance-critical in high-frequency analog sensing paths.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	2.7 V (min 2.565 V, max 2.835 V at I_Z = 50 µA); defines precise clamping threshold for 2.7 V rail stabilization
Tolerance	±5 % (C-series); tighter than standard ±10 % Zeners, enabling accurate voltage margining in safety-critical ECUs
Power Dissipation	250 mW at T_amb ≤ 25 °C on FR4 PCB; supports continuous regulation in compact automotive modules without heatsinking
Test Current	50 µA; allows stable regulation in micropower circuits such as coin-cell–powered telematics wake-up monitors
Differential Resistance	≤600 Ω at I_Z = 5 mA; ensures minimal voltage shift under small load variations in reference divider networks
Reverse Leakage	≤1.0 µA at V_R = 2.0 V; guarantees negligible quiescent current draw in always-on vehicle subsystems
Junction Temperature	−55 °C to +150 °C; meets extended automotive thermal requirements for under-hood and cabin applications

Pinout & Package

Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), qualified per AEC-Q101 for automotive reliability.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node when used as shunt regulator
2	Not Connected (n.c.)	Internally unconnected; reduces stray capacitance and improves high-frequency stability in noise-sensitive analog rails
3	Cathode (K)	Reverse-biased terminal; ties to regulated voltage node and current-limiting resistor in standard Zener configuration

Key Features

Feature	Design Value
Low-test-current regulation	Specified at 50 µA - enables reliable operation in sub-100 µA bias networks for IoT sensor nodes
AEC-Q101 qualification	Validated for automotive Grade 1 (−40 °C to +125 °C ambient) and stress-tested per discrete semiconductor standard
Optimized leakage profile	Intentional minor rise in IR per AN90031 - reduces switching noise in CAN/LIN bus voltage supervisors
Two-tolerance series	±2 % (B) and ±5 % (C) options - C2V7-QR offers cost-optimized precision for non-critical 2.7 V references
Thermal robustness	R_th(j-a) = 500 K/W on FR4 - supports operation up to 125 °C junction without derating in confined ECU layouts

Applications

Automotive ECU Power Monitoring

Low-Power Sensor Reference

Use Scenario: Monitoring 3.3 V supply rail integrity in engine control units during cold cranking.

IC Role / Device Role / Timing Role: Shunt voltage reference providing fail-safe 2.7 V clamp to trigger brown-out detection circuitry.

Use Value: Stable 2.7 V threshold with −3.5 mV/K tempco ensures consistent trip point across −40 °C to +125 °C operating range.

Use Scenario: Biasing a MEMS pressure sensor in tire pressure monitoring system (TPMS) using coin-cell battery.

IC Role / Device Role / Timing Role: Low-current Zener reference establishing precision 2.7 V excitation voltage for ratiometric ADC conversion.

Use Value: 50 µA test current and ≤1.0 µA leakage at 2.0 V minimize standby current, extending battery life beyond 10 years.

Microcontroller Reset Supervision

USB-C Port Voltage Clamping

Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCU in ADAS camera module during power-up.

IC Role / Device Role / Timing Role: Zener-based reset generator with RC delay, using 2.7 V threshold to ensure valid core voltage before release.

Use Value: 600 Ω differential resistance prevents overshoot-induced false resets during transient load steps on 3.3 V LDO output.

Use Scenario: Protecting USB-C CC line receiver from overvoltage during hot-plug events in infotainment head unit.

IC Role / Device Role / Timing Role: Fast-switching Zener clamp limiting CC pin voltage to 2.7 V while preserving signal integrity.

Use Value: Not-connected Pin 2 minimizes parasitic capacitance (<190 pF at 0 V), maintaining >400 kHz signal bandwidth per USB PD spec.

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-C2V7,215 (Nexperia)	Same 2.7 V, ±5 %, SOT23, but non-AEC-Q101; higher typical leakage (2.0 µA vs 1.0 µA at 2.0 V)	Approved only for industrial/commercial use; lacks automotive qualification documentation and stress test records	Select when AEC-Q101 compliance is not required and cost is primary driver in consumer electronics designs.
MMSZ4678T1G (onsemi)	2.7 V, ±5 %, SOD-123 package; 300 mW P_tot; R_diff = 100 Ω (lower); no n.c. pin; no AEC-Q101 listing in latest datasheet	Larger footprint (3.7 mm × 1.6 mm); unsuitable for space-constrained automotive PCBs requiring SOT23 density	Choose for higher-power 2.7 V clamping where board area permits and lower dynamic impedance is critical.

Compared with BZX8450-C2V7-QR, the BZX84-C2V7,215 sacrifices automotive qualification and leakage performance for lower cost, while MMSZ4678T1G trades package size and qualification for improved regulation stiffness-making the QR variant uniquely balanced for AEC-Q101–mandated, space-limited, low-leakage 2.7 V reference needs.

Availability

BZX8450-C2V7-QR is available at Aetrix Electronics and suitable for automotive ECU monitoring, low-power sensor reference, and microcontroller reset supervision requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZX8450-C2V7-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, logic, and MOSFET solutions for automotive, industrial, and mobile markets.

BZX8450-Q series belongs to Nexperia's AEC-Q101–qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage regulation in automotive electronics where precision, longevity, and thermal resilience are mandatory.

FAQ

What is the maximum reverse voltage (V_R) that BZX8450-C2V7-QR can withstand before breakdown?

The device has no defined "maximum reverse voltage" prior to breakdown-it is designed to operate *in* controlled reverse breakdown. Its nominal Zener voltage is 2.7 V (2.565 V to 2.835 V), and it begins regulating at ~2.5 V. Applying >3.0 V continuously without current limiting risks exceeding 250 mW dissipation and thermal failure. Absolute maximum reverse power is 40 W for 100 µs pulses only.

Does Pin 2 (n.c.) require PCB trace routing or grounding?

No. Pin 2 is internally unconnected and must remain floating on the PCB. Routing a trace to it introduces unnecessary parasitic capacitance and potential contamination risk during assembly. The recommended footprint (Fig. 10) shows no solder mask opening or copper pad for Pin 2-only Pins 1 and 3 are electrically active and require connection.

How does the −3.5 mV/K temperature coefficient affect regulation accuracy over temperature?

At 2.7 V nominal, a −3.5 mV/K coefficient means the Zener voltage decreases by ~0.42 V from −40 °C to +125 °C (ΔT = 165 K). This yields a drift of ±0.21 V around nominal, resulting in a total span of 2.49 V to 2.91 V. For applications needing tighter stability, pairing with a positive-tempco component (e.g., silicon diode) in series compensates this drift.

Can BZX8450-C2V7-QR replace BZX84-C2V7 in an existing design?

Yes, electrically and physically-both are SOT23, 2.7 V ±5 % Zeners-but BZX8450-C2V7-QR adds AEC-Q101 qualification, lower leakage (1.0 µA vs 2.0 µA), and the n.c. Pin 2 for noise reduction. No layout change is needed, but revalidation is required for automotive deployment due to differing qualification scope and stress test history.

BZX8450-C2V7-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):: 2.7 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 1 V

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

Operating Temperature:: -55°C ~ 150°C (TA)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX8450-C2V7-QR FAQ

1.How can I place an order for BZX8450-C2V7-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C2V7-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-C2V7-QR reliable?

The price and inventory of BZX8450-C2V7-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-C2V7-QR is usually 5 days.

3.What payment methods are accepted for BZX8450-C2V7-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V7-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C2V7-QR?

BZX8450-C2V7-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C2V7-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-C2V7-QR?

For technical support, including BZX8450-C2V7-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V7-QR requirements.

6.How does Aetrix verify that BZX8450-C2V7-QR is sourced from the original manufacturer or authorized distributors?

All BZX8450-C2V7-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-C2V7-QR meets industry standards.

7.What is the process for return or replacement of BZX8450-C2V7-QR?

All BZX8450-C2V7-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V7-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-C2V7-QR part is unused and in its original packaging.

Return procedure for BZX8450-C2V7-QR:

1.Submit a request within 90 days.

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

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