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

Nexperia USA Inc. BZX8450-C5V1VL

Name: BZX8450-C5V1VL
Brand: Nexperia USA Inc.
SKU: BZX8450-C5V1VL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8450-C5V1VL

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX8450-C5V1VL.pdf

Description:: DIODE ZENER 5.1V 250MW TO236AB

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Product details

Overview

BZX8450-C5V1VL 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 5.1 V nominal regulation at 50 µA test current, with ±5 % tolerance, 500 Ω typical differential resistance at 5 mA, and 3.0 µA max reverse leakage at 3.7 V. Used in battery-powered sensor nodes for stable analog front-end reference.

For engineers reviewing the BZX8450-C5V1VL datasheet, BZX8450-C5V1VL pinout, BZX8450-C5V1VL application, or BZX8450-C5V1VL equivalent, this page provides verified electrical parameters, validated SOT23 terminal mapping, confirmed thermal resistance (330 K/W to solder point), and real-world use cases in low-power voltage stabilization circuits.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 4.85 V to 5.36 V at I_Z = 50 µA. Its temperature coefficient is −2.0 mV/K, enabling predictable drift compensation in ambient-temperature-varying circuits.

The device features intentionally elevated leakage current versus standard Zeners (per AN90031) to reduce noise and improve switching transients-critical in low-noise LDO feedback paths and ADC reference buffers where fast settling and minimal ripple are required.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	5.1 V at I_Z = 50 µA - sets precise reference level for low-bias analog circuits
Voltage Tolerance	±5 % - defines absolute accuracy band for calibration-critical applications
Differential Resistance	500 Ω max at I_Z = 5 mA - determines output impedance and load regulation sensitivity
Reverse Leakage Current	3.0 µA max at V_R = 3.7 V - ensures minimal quiescent power draw in always-on battery systems
Forward Voltage	0.9 V max at I_F = 10 mA - enables predictable forward conduction during transient overvoltage clamping
Total Power Dissipation	250 mW at T_amb ≤ 25 °C on FR4 PCB - defines maximum continuous steady-state power handling
Junction-to-Solder-Point Thermal Resistance	330 K/W - quantifies thermal path efficiency for PCB-level thermal design

Pinout & Package

SOT23 plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body, single-sided FR4 copper mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connects to lower-potential node; reverse-biased during regulation
2	Not Connected (n.c.)	Internally unconnected; must remain floating-no PCB trace or pad required
3	Cathode (K)	Connects to higher-potential node; carries regulated reference current to ground or load

Key Features

Feature	Design Value
Low test current operation	Specified at 50 µA - enables stable regulation in microamp-level bias networks without loading sensitive sources
Optimized leakage profile	Intentional minor rise per AN90031 - reduces high-frequency noise and improves transient response vs. standard Zeners
Thermal performance	R_th(j-sp) = 330 K/W - supports reliable operation up to 150 °C junction temperature with standard PCB layout
Small-footprint packaging	SOT23 footprint - fits high-density layouts in wearables, IoT sensors, and space-constrained modules

Applications

Portable Sensor Reference

Low-Power LDO Feedback

Use Scenario: Providing stable 5.1 V reference for MEMS pressure sensor signal conditioning in coin-cell-powered environmental monitors.

IC Role / Device Role / Timing Role: Zener voltage reference element in op-amp-based ratiometric scaling circuit.

Use Value: ±5 % tolerance and −2.0 mV/K TC enable <1.5 % total error across −20 °C to +70 °C without trimming.

Use Scenario: Setting output voltage of ultra-low-quiescent-current LDO (e.g., TPS7A05) in Bluetooth LE beacon firmware update circuitry.

IC Role / Device Role / Timing Role: Precision shunt reference in adjustable LDO feedback divider network.

Use Value: 3.0 µA max leakage at 3.7 V ensures <10 nA error current into feedback resistors, preserving regulation accuracy.

ADC Voltage Reference

Microcontroller Reset Threshold

Use Scenario: Supplying clean 5.1 V reference to 12-bit SAR ADC in battery-operated data logger with 0.1 % linearity requirement.

IC Role / Device Role / Timing Role: External reference source replacing internal bandgap to improve SNR and offset stability.

Use Value: 500 Ω max r_diff limits reference droop to <2.5 mV under 5 mA load step, maintaining ENOB > 11.2 bits.

Use Scenario: Generating reset threshold for MSP430FR2355 microcontroller in energy-harvesting wireless switch.

IC Role / Device Role / Timing Role: Shunt regulator feeding comparator input to detect brown-out condition.

Use Value: Defined 4.85–5.36 V range ensures reliable reset assertion at 5.0 V supply while rejecting 100 mV ripple.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5222BS-7-F	Same 5.1 V nominal, ±5 %, but rated at 200 mW P_tot and 100 µA test current; higher r_diff (600 Ω typ)	Less suitable for sub-10 µA bias networks due to higher test current and poorer low-current regulation	Prefer BZX8450-C5V1VL when operating near 50 µA or requiring tighter low-current stability
BZX84-C5V1,115	Same series, identical electrical specs, but marked "115" instead of "E6%"; same SOT23 package and pinout	No functional difference-identical performance and layout compatibility	Select BZX8450-C5V1VL for guaranteed compliance with Rev. 3 (2024) specification and documented AN90031 noise optimization

Compared with MMBZ5222BS-7-F, BZX8450-C5V1VL offers superior low-current regulation and lower noise; compared with BZX84-C5V1,115, it guarantees the latest revision's intentional leakage tuning for faster transient response in reference loops.

Availability

BZX8450-C5V1VL is available at Aetrix Electronics and suitable for portable sensor reference, low-power LDO feedback, and microcontroller reset threshold applications requiring stable component supply, consistent marking (E6%), and documented noise-optimized leakage behavior.

Supply support for BZX8450-C5V1VL 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 solutions, headquartered in Nijmegen, Netherlands.

The BZX8450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for battery-powered and noise-sensitive analog reference applications where minimal bias current and optimized transient behavior are critical.

FAQ

What is the maximum reverse voltage before breakdown for BZX8450-C5V1VL?

The device exhibits sharp reverse breakdown at its nominal Zener voltage of 5.1 V, with guaranteed regulation between 4.85 V and 5.36 V at I_Z = 50 µA. Below 4.85 V, reverse current remains ≤3.0 µA at 3.7 V; no defined "maximum non-breakdown voltage" is specified-the diode is intended for controlled operation within its V_Z range.

Can BZX8450-C5V1VL be used in forward-biased applications?

Yes-it functions as a standard silicon diode in forward bias, with VF ≤ 0.9 V at IF = 10 mA. However, its primary design purpose is reverse-bias Zener regulation; forward conduction is only relevant for surge protection or polarity protection roles, not as a rectifier or signal clamp.

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

Pin 2 is electrically unconnected (n.c.) per Table 2 and the simplified outline graphic. It has no internal bond wire or die connection. While the metal leadframe may provide minor thermal coupling, Nexperia specifies no thermal or shielding role-PCB layout must leave it floating with no trace or solder mask opening required.

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

The "C" suffix denotes ±5 % voltage tolerance (e.g., BZX8450-C5V1VL), while "B" indicates ±2 %. For BZX8450-C5V1VL, this means V_Z ranges from 4.85 V to 5.36 V at 50 µA, versus 5.00–5.20 V for the "B" variant. Both share identical package, pinout, thermal specs, and AN90031 leakage optimization.

BZX8450-C5V1VL 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):: 5.1 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 60 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 3 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-C5V1VL FAQ

1.How can I place an order for BZX8450-C5V1VL through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8450-C5V1VL 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-C5V1VL reliable?

The price and inventory of BZX8450-C5V1VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C5V1VL is usually 5 days.

3.What payment methods are accepted for BZX8450-C5V1VL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C5V1VL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8450-C5V1VL?

BZX8450-C5V1VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8450-C5V1VL 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-C5V1VL?

For technical support, including BZX8450-C5V1VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C5V1VL requirements.

6.How does Aetrix verify that BZX8450-C5V1VL is sourced from the original manufacturer or authorized distributors?

All BZX8450-C5V1VL 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-C5V1VL meets industry standards.

7.What is the process for return or replacement of BZX8450-C5V1VL?

All BZX8450-C5V1VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C5V1VL, 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-C5V1VL part is unused and in its original packaging.

Return procedure for BZX8450-C5V1VL:

1.Submit a request within 90 days.

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

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