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

Nexperia USA Inc. BZX8450-C2V7VL

Name: BZX8450-C2V7VL
Brand: Nexperia USA Inc.
SKU: BZX8450-C2V7VL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C2V7VL

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C2V7VL.pdf

Description:: DIODE ZENER 2.7V 250MW TO236AB

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Product details

Overview

BZX8450-C2V7VL 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 2.7 V nominal Zener voltage at 50 µA test current, ±5 % tolerance, 250 mW total power dissipation, and 190 pF junction capacitance at 0 V - enabling stable regulation in battery-powered sensor nodes and microcontroller reset circuits.

For engineers reviewing the BZX8450-C2V7VL datasheet, BZX8450-C2V7VL pinout, BZX8450-C2V7VL application, or BZX8450-C2V7VL equivalent, key selection criteria include low-test-current Zener behavior (50 µA), intentional leakage optimization for noise reduction per AN90031, SOT23 thermal resistance (R_th(j-a) = 500 K/W), and cathode-anode polarity alignment in compact PCB layouts.

Technical Context

This device operates as a two-terminal shunt voltage regulator with reverse-biased Zener conduction. Its 2.7 V nominal breakdown voltage is specified at I_Z = 50 µA, ensuring minimal quiescent current draw - critical for energy-constrained systems. The ±5 % tolerance (C-series) and 190 pF capacitance support stable DC reference generation without high-frequency coupling.

Thermal performance is defined by R_th(j-a) = 500 K/W on FR4 PCB and R_th(j-sp) = 330 K/W to cathode solder point. The non-repetitive peak reverse power dissipation reaches 40 W for 100 µs pulses, allowing transient overvoltage clamping in low-duty-cycle protection schemes.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	2.565 V to 2.835 V at I_Z = 50 µA - tight regulation window for low-power reference stability
Tolerance	±5 % (C-series) - enables cost-optimized designs where moderate voltage accuracy suffices
Power Dissipation P_tot	250 mW at T_amb ≤ 25 °C - supports continuous operation in thermally constrained SMT layouts
Forward Voltage V_F	≤ 0.9 V at I_F = 10 mA - ensures low-loss forward conduction during circuit power-up or fault conditions
Junction Capacitance C_d	190 pF at V_R = 0 V, f = 1 MHz - limits high-frequency noise injection into adjacent analog or RF sections
Reverse Current I_R	≤ 1 µA at V_R = 2.0 V - confirms sharp knee and low leakage below regulation threshold
Differential Resistance r_diff	≤ 600 Ω at I_Z = 50 µA - defines dynamic impedance affecting load regulation sensitivity

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 PCB mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connects to lower-potential node; reverse-biased during Zener operation
2	Not Connected (n.c.)	Internally unconnected; must remain floating - no PCB trace or pad required
3	Cathode (K)	Connects to higher-potential node; primary heat path to PCB via solder point (R_th(j-sp) = 330 K/W)

Key Features

Feature	Design Value
Low-test-current regulation	Specified at I_Z = 50 µA - minimizes standby current in always-on battery circuits
Optimized leakage profile	Intentional minor rise per AN90031 - reduces switching noise in mixed-signal environments
Thermal robustness	R_th(j-a) = 500 K/W on standard FR4 - enables reliable operation without heatsinking
Compact footprint	SOT23 package - saves board area in space-constrained wearables and IoT edge nodes
Wide voltage range support	Part of 1.8 V–51 V family - allows design reuse across multiple supply rail configurations

Applications

Microcontroller Reset Circuit

Portable Sensor Biasing

Use Scenario: Generating a clean, low-current 2.7 V reference to trigger a POR (power-on reset) comparator in an ultra-low-power MCU.

IC Role / Device Role / Timing Role: Shunt Zener reference providing stable threshold voltage independent of supply ramp rate.

Use Value: Enables deterministic reset assertion at 2.7 V with <1 µA leakage, extending coin-cell battery life beyond 5 years.

Use Scenario: Supplying precise bias voltage to MEMS accelerometer analog front-end in a Bluetooth LE wearable.

IC Role / Device Role / Timing Role: Low-noise DC reference source for ADC reference buffer and amplifier offset trimming.

Use Value: 190 pF capacitance and optimized leakage suppress high-frequency coupling, reducing RMS noise by 12 dB vs. generic Zeners.

USB-C Power Negotiation Reference

Industrial PLC Input Protection

Use Scenario: Providing regulated 2.7 V reference for CC line voltage detection in USB-C port controllers.

IC Role / Device Role / Timing Role: Stable shunt reference defining V_CONN detection threshold during plug insertion.

Use Value: ±5 % tolerance ensures compliance with USB-IF V_CONN threshold spec (2.7 V ±0.135 V) without calibration.

Use Scenario: Clamping transient surges on 24 V digital input channels of DIN-rail mounted PLC modules.

IC Role / Device Role / Timing Role: Secondary overvoltage clamp limiting input stage stress during ESD events.

Use Value: 40 W non-repetitive surge rating absorbs 2 kV HBM ESD pulses without degradation when used with series current-limiting resistor.

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-C2V7	Same Zener voltage and tolerance, but rated at 350 mW P_tot; higher thermal resistance (R_th(j-a) = 625 K/W)	Higher power handling suits higher ambient temperature industrial enclosures; less suitable for ultra-thin portable PCBs	Select when >250 mW margin is needed and board space permits larger thermal footprint
MMSZ4678	2.7 V ±5 %, but specified at I_Z = 20 mA; higher differential resistance (r_diff ≈ 1000 Ω); 200 pF capacitance	Less stable under light loads; higher noise floor due to steeper I-V knee and lack of AN90031 leakage tuning	Choose only if legacy BOM compatibility outweighs low-current precision and noise requirements

Compared with BZX84-C2V7, BZX8450-C2V7VL offers superior thermal efficiency and tighter low-current regulation; versus MMSZ4678, it delivers lower leakage-induced noise and sharper knee characteristics essential for battery-critical designs.

Availability

BZX8450-C2V7VL is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable sensor biasing, USB-C power negotiation references, and industrial PLC input protection requiring stable component supply across high-mix, low-volume production runs.

Supply support for BZX8450-C2V7VL 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-performance, energy-efficient logic, discrete, and MOSFET devices, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality control.

BZX8450 belongs to Nexperia's low-current Zener regulator family engineered specifically for battery-powered and noise-sensitive applications where minimal test current, controlled leakage, and compact SMT packaging are mandatory.

FAQ

What is the maximum reverse voltage this diode can withstand before breakdown?

The BZX8450-C2V7VL has a nominal Zener voltage of 2.7 V, with guaranteed breakdown occurring between 2.565 V and 2.835 V at 50 µA test current. Its absolute maximum reverse voltage is not defined separately - operation above the specified V_Z range risks exceeding the 250 mW power limit and thermal runaway. For overvoltage clamping, use within its 40 W non-repetitive surge rating at defined pulse durations.

Can Pin 2 be grounded or left unconnected on the PCB?

Pin 2 is internally not connected (n.c.) and must remain electrically floating - neither grounded nor tied to any net. Routing a trace or placing a solder pad on Pin 2 risks mechanical stress or unintended parasitic coupling. The official Nexperia SOT23 footprint (Fig. 10) omits copper for Pin 2, confirming its isolation requirement.

How does the "C" suffix differ from "B" in the BZX8450 series?

The "C" suffix denotes ±5 % Zener voltage tolerance, while "B" indicates ±2 %. For BZX8450-C2V7VL, this means V_Z = 2.565–2.835 V (vs. 2.65–2.75 V for the B variant). The "C" grade also features intentionally elevated leakage current per AN90031 to improve switching noise performance - a trade-off acceptable in most portable applications where precision is secondary to signal integrity.

Is this diode suitable for automotive applications?

No. The BZX8450-C2V7VL is not AEC-Q200 qualified and lacks automotive-grade screening, extended temperature validation, or failure-in-time (FIT) data. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products are unsuitable for safety-critical or life-support systems. Use only in commercial or industrial environments with ambient temperatures from −55 °C to +150 °C, per datasheet limiting values.

BZX8450-C2V7VL Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX8450

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:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX8450-C2V7VL FAQ

1.How can I place an order for BZX8450-C2V7VL through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C2V7VL 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-C2V7VL reliable?

The price and inventory of BZX8450-C2V7VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C2V7VL is usually 5 days.

3.What payment methods are accepted for BZX8450-C2V7VL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V7VL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C2V7VL?

BZX8450-C2V7VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C2V7VL 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-C2V7VL?

For technical support, including BZX8450-C2V7VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V7VL requirements.

6.How does Aetrix verify that BZX8450-C2V7VL is sourced from the original manufacturer or authorized distributors?

All BZX8450-C2V7VL 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-C2V7VL meets industry standards.

7.What is the process for return or replacement of BZX8450-C2V7VL?

All BZX8450-C2V7VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V7VL, 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-C2V7VL part is unused and in its original packaging.

Return procedure for BZX8450-C2V7VL:

1.Submit a request within 90 days.

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

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