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

Nexperia USA Inc. BZX8450-C2V2R

Name: BZX8450-C2V2R
Brand: Nexperia USA Inc.
SKU: BZX8450-C2V2R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C2V2R

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C2V2R.pdf

Description:: DIODE ZENER 2.2V 250MW TO236AB

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Product details

Overview

BZX8450-C2V2R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and low-power biasing at 2.2 V nominal working voltage with ±5 % tolerance, 50 µA test current, and 250 mW total power dissipation. It serves in portable battery-powered circuits, sensor bias networks, and low-quiescent-current voltage clamping applications.

For engineers reviewing the BZX8450-C2V2R datasheet, BZX8450-C2V2R pinout, BZX8450-C2V2R application, or BZX8450-C2V2R equivalent, this page delivers verified electrical characteristics, thermal resistance values, reverse leakage behavior at VR = 0 V, differential resistance under IZ = 5 mA, and temperature coefficient data - all critical for low-bias analog design and voltage stabilization in space-constrained layouts.

Technical Context

This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across anode-to-cathode terminals when reverse-biased above its specified Zener voltage (2.09–2.31 V). Its low 50 µA test current enables operation in micro-power systems where supply current must remain below 100 µA.

The BZX8450-C2V2R exhibits a negative temperature coefficient of −3.5 mV/K and differential resistance of ≤600 Ω at IZ = 50 µA, supporting predictable voltage drift and minimal dynamic impedance in feedback paths. Its 210 pF capacitance at VR = 0 V and f = 1 MHz limits high-frequency noise coupling in signal conditioning stages.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.09 V to 2.31 V at I_Z = 50 µA - defines regulation threshold with ±5 % tolerance for non-critical biasing
Forward Voltage (V_F)	≤ 0.9 V at I_F = 10 mA - ensures low conduction loss during forward-biased protection or ESD clamp use
Total Power Dissipation (P_tot)	250 mW at T_amb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling in standard layout
Differential Resistance (r_diff)	≤ 600 Ω at I_Z = 50 µA - indicates voltage regulation stiffness under light-load conditions
Reverse Current (I_R)	≤ 1.0 µA at V_R = 1.0 V - confirms low leakage prior to breakdown, critical for battery runtime
Temperature Coefficient (S_Z)	−3.5 mV/K - quantifies voltage drift per degree Celsius, enabling thermal error budgeting in reference designs
Junction-to-Ambient R_th(j-a)	500 K/W in free air - determines self-heating rise under sustained 250 mW load without heatsinking

Pinout & Package

SOT23 plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body, with standard footprint per Figure 10 (reflow) and Figure 11 (wave soldering).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Positive terminal in forward bias; connected to lower-potential node in Zener regulation configuration
2	Not Connected (n.c.)	Internally unconnected; must be left floating or tied to ground only if required by board layout symmetry
3	Cathode (K)	Regulated output node in reverse bias; connects to voltage rail being stabilized

Key Features

Feature	Design Value
Low Test Current Operation	Specified at 50 µA - enables use in ultra-low-power systems where bias current must stay sub-100 µA
Optimized Leakage Profile	Intentional minor rise in leakage current - improves switching speed and reduces noise in transient-sensitive analog references
Thermal Stability	−3.5 mV/K temperature coefficient - allows predictable compensation in temperature-varying environments
Small-Signal Capacitance	210 pF at VR = 0 V, f = 1 MHz - minimizes capacitive loading on high-impedance nodes in sensor interfaces
Robust Power Handling	250 mW P_tot with 40 W non-repetitive surge rating - supports brief overvoltage events without failure

Applications

Portable Sensor Biasing

Microcontroller Reset Reference

Use Scenario: Providing stable 2.2 V bias to MEMS accelerometers and analog front-end op-amps in wearables.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise operating point for signal chain components.

Use Value: Enables <1 µA quiescent current in always-on sensing mode while maintaining ±1.5 % voltage accuracy over −40 °C to +85 °C.

Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3 V microcontrollers in battery-backed IoT nodes.

IC Role / Device Role / Timing Role: Zener-based voltage monitor triggering POR (power-on reset) circuitry.

Use Value: Delivers repeatable 2.2 V trip point with <0.5 % hysteresis via external resistor divider, eliminating need for dedicated reset IC.

Low-Power ADC Reference

ESD Clamp Protection

Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in energy-harvesting sensor transmitters.

IC Role / Device Role / Timing Role: Precision low-current voltage source for internal ADC reference input (VREF+).

Use Value: Maintains <0.8 LSB integral nonlinearity contribution due to <600 Ω dynamic impedance at 50 µA operating point.

Use Scenario: Parallel-connected protection element on I²C bus lines in compact industrial controllers.

IC Role / Device Role / Timing Role: Low-capacitance shunt clamp limiting line voltage to 2.31 V during ESD transients.

Use Value: Adds only 210 pF capacitance to signal path while clamping >8 kV HBM surges without latch-up or parametric shift.

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-C2V2	Same SOT23 package and 2.2 V nominal voltage, but ±5 % tolerance and no intentional leakage optimization	Lacks AN90031 noise-reduction tuning; higher r_diff (700 Ω vs. 600 Ω) at 50 µA	Acceptable where cost sensitivity outweighs fast-switching or low-noise requirements
MMSZ4678T1G	2.2 V Zener, SOD-123 package, 500 mW P_tot, but 100 µA test current and +2.5 mV/K tempco	Higher power rating but larger footprint and positive tempco - unsuitable for precision low-drift references	Preferred only when board space allows SOD-123 and thermal margin exceeds 250 mW

Compared with BZX84-C2V2, the BZX8450-C2V2R offers tighter low-current regulation stability and lower noise; versus MMSZ4678T1G, it provides superior thermal predictability and smaller form factor at the expense of absolute power headroom.

Availability

BZX8450-C2V2R is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and low-power ADC reference applications requiring stable component supply, consistent marking (6Q%), and traceable lot-level compliance with Rev. 3 (July 2024) specifications.

Supply support for BZX8450-C2V2R 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 discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.

The BZX8450 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for battery-powered and space-constrained applications demanding stable voltage references at microampere bias levels.

FAQ

What is the maximum reverse voltage before breakdown for BZX8450-C2V2R?

The BZX8450-C2V2R has a nominal Zener voltage of 2.2 V with a guaranteed range of 2.09 V to 2.31 V at I_Z = 50 µA. Breakdown begins within this band; operation below 2.09 V ensures non-conductive state with ≤1.0 µA leakage at V_R = 1.0 V. Absolute maximum reverse voltage is not defined - sustained bias beyond 2.31 V initiates regulation.

Can BZX8450-C2V2R be used in forward-bias applications?

Yes - its forward voltage is specified at ≤0.9 V at I_F = 10 mA, making it suitable as a low-drop silicon diode for polarity protection or basic rectification in low-current paths. However, it lacks optimized forward characteristics like Schottky diodes, so forward conduction should remain below 200 mA per Absolute Maximum Ratings.

How does the "C" suffix affect performance versus "B" variants?

The "C" suffix denotes ±5 % tolerance and intentional minor leakage current optimization per AN90031, improving switching speed and reducing noise in dynamic reference applications. "B" variants offer ±2 % tolerance but lack this leakage tuning, resulting in higher r_diff and slower transient response under light loads.

Is thermal derating required above 25 °C ambient?

Yes - total power dissipation must be linearly derated above 25 °C using R_th(j-a) = 500 K/W. For example, at 75 °C ambient, maximum allowable P_tot drops to 125 mW to maintain T_j ≤ 150 °C. Derating follows P_tot(T_amb) = 250 mW × (1 − (T_amb − 25)/500).

BZX8450-C2V2R Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 2.2 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 4 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-C2V2R FAQ

1.How can I place an order for BZX8450-C2V2R through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C2V2R 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-C2V2R reliable?

The price and inventory of BZX8450-C2V2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C2V2R is usually 5 days.

3.What payment methods are accepted for BZX8450-C2V2R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V2R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C2V2R?

BZX8450-C2V2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C2V2R 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-C2V2R?

For technical support, including BZX8450-C2V2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V2R requirements.

6.How does Aetrix verify that BZX8450-C2V2R is sourced from the original manufacturer or authorized distributors?

All BZX8450-C2V2R 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-C2V2R meets industry standards.

7.What is the process for return or replacement of BZX8450-C2V2R?

All BZX8450-C2V2R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V2R, 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-C2V2R part is unused and in its original packaging.

Return procedure for BZX8450-C2V2R:

1.Submit a request within 90 days.

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

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