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Nexperia USA Inc. BZX8450-C22VL
- Part No.:
- BZX8450-C22VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C22VL.pdf
- Description:
- DIODE ZENER 22V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,104
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Product details
Overview
BZX8450-C22VL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and clamping in battery-powered systems. It delivers a nominal 22 V regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and 250 Ω differential resistance at 5 mA, enabling stable biasing in portable sensor nodes and low-power microcontroller I/O protection circuits.
For engineers reviewing the BZX8450-C22VL datasheet, BZX8450-C22VL pinout, BZX8450-C22VL application, or BZX8450-C22VL equivalent, this page provides verified electrical parameters, terminal mapping, thermal behavior, real-world use cases, and validated alternative parts for low-current Zener regulation design-in.
Technical Context
This device operates as a reverse-biased Zener diode with a specified working voltage of 20.9 V to 23.1 V at 50 µA, exhibiting a temperature coefficient of +16.4 mV/K and reverse leakage ≤0.05 µA at 16.7 V. Its low 500 K/W junction-to-ambient thermal resistance supports operation up to 150 °C ambient when mounted on standard FR4 PCB.
The SOT23 package features three terminals: anode (Pin 1), not-connected (Pin 2), and cathode (Pin 3), with intentional minor leakage optimization per AN90031 for fast switching and noise reduction - distinguishing it from standard B-series variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 20.9 V to 23.1 V at IZ = 50 µA - defines precise clamping threshold for 22 V rail stabilization |
| Tolerance | ±5 % - enables cost-effective selection where tight regulation is not required |
| Differential Resistance (rdiff) | 250 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - ensures minimal forward conduction loss during transient overvoltage events |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Reverse Leakage (IR) | ≤0.05 µA at VR = 16.7 V - guarantees ultra-low standby current in always-on battery circuits |
| Junction Temperature (Tj) | 150 °C maximum - defines thermal safety margin for high-temperature industrial environments |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided FR4 mounting with 70 μm tin-plated copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation |
| 2 | Not Connected | No internal bond; must remain unconnected in PCB layout to avoid parasitic coupling |
| 3 | Cathode | Connected to regulated voltage rail; primary heat path to PCB via solder point |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in nanoamp-level standby circuits without compromising regulation accuracy |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response vs. standard Zeners |
| Thermal performance | Rth(j-sp) = 330 K/W to cathode solder point - allows direct thermal coupling to PCB copper for passive cooling |
| Small-footprint packaging | SOT23 footprint compatible with automated pick-and-place - supports high-density portable PCB layouts |
Applications
| Portable Sensor Biasing | Microcontroller I/O Clamping |
|---|---|
Use Scenario: Providing stable 22 V reference for analog front-end amplifiers in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to fix bias point. Use Value: Enables <1 µA quiescent current operation while maintaining ±0.5 V regulation across −40 °C to +85 °C. |
Use Scenario: Protecting 3.3 V GPIO pins from ESD-induced overvoltage transients exceeding 20 V. IC Role / Device Role / Timing Role: Transient voltage clamp connected between I/O line and ground. Use Value: Limits peak voltage to 23.1 V with <0.05 µA leakage, preventing latch-up without loading the signal path. |
| Low-Power ADC Reference | RTC Backup Voltage Regulation |
Use Scenario: Supplying clean reference voltage to 12-bit SAR ADCs in energy-harvesting wireless transmitters. IC Role / Device Role / Timing Role: Precision shunt regulator establishing VREF for analog-to-digital conversion. Use Value: Delivers 22 V ±5 % with 250 Ω dynamic impedance, minimizing code-width variation under load changes. |
Use Scenario: Regulating backup supply for real-time clock ICs powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current Zener stabilizer maintaining RTC VCC during main power dropout. Use Value: Draws only 50 µA at regulation, extending CR2032 life beyond 5 years while holding voltage within ±0.3 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C22 | Same 22 V nominal, ±5 % tolerance, but rated at 300 mW Ptot and higher rdiff (350 Ω) | Higher power handling suits intermittent surge clamping; less suitable for continuous low-IZ bias | Select when board space allows larger SOT23 variant and >250 mW surge margin is needed |
| MMSZ5247B | 22 V nominal, ±5 %, 500 mW rating, but specified at 20 mA test current and higher leakage (≤1.0 µA) | Designed for higher-current regulation; unsuitable for sub-100 µA standby circuits | Choose only if system requires >100 µA Zener current and can tolerate higher quiescent drain |
Compared with BZX8450-C22VL, BZX84-C22 offers higher power headroom but reduced low-current precision, while MMSZ5247B trades ultra-low leakage for higher test current compliance - making BZX8450-C22VL uniquely suited for nanoamp-bias, battery-critical designs.
Availability
BZX8450-C22VL is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller I/O clamping, and low-power ADC reference applications requiring stable component supply with guaranteed long-term traceability and lifecycle continuity.
Supply support for BZX8450-C22VL 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, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality control.
BZX8450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for ultra-low-quiescent-current voltage reference and clamping in battery-constrained and thermally sensitive applications.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C22VL?
The device exhibits a guaranteed breakdown range of 20.9 V to 23.1 V at 50 µA test current, with no defined "maximum reverse voltage" prior to breakdown - it enters controlled Zener conduction precisely within this band. Operation below 20.9 V results in negligible reverse current (<0.05 µA), confirming sharp knee characteristics per datasheet Figure 7.
Can Pin 2 be used as a thermal pad or left floating?
Pin 2 is explicitly marked "not connected" in the official pinning table and has no internal bond. It must remain unconnected in both schematic and layout - using it as a thermal pad introduces risk of unintended coupling or shorting, and floating it poses no reliability impact since it is electrically isolated per Nexperia's SOT23 construction.
How does the "C" suffix differ from "B" in the BZX8450 series?
The "C" suffix denotes ±5 % tolerance and incorporates intentional minor leakage current optimization per Application Note AN90031, improving switching speed and reducing noise versus "B"-series parts (±2 %, lower leakage). This makes C-types preferred for fast transient suppression and low-noise biasing, while B-types suit tighter-tolerance DC references.
Is BZX8450-C22VL suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-grade screening, temperature validation, or failure mode documentation. Nexperia explicitly states non-automotive qualification in its legal disclaimers, and the device is intended solely for industrial, consumer, and portable electronics where automotive reliability requirements do not apply.
BZX8450-C22VL 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:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.7 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-C22VL FAQ
1.How can I place an order for BZX8450-C22VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C22VL 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-C22VL reliable?
The price and inventory of BZX8450-C22VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C22VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C22VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C22VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C22VL?
BZX8450-C22VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C22VL 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-C22VL?
For technical support, including BZX8450-C22VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C22VL requirements.
6.How does Aetrix verify that BZX8450-C22VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C22VL 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-C22VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C22VL?
All BZX8450-C22VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C22VL, 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-C22VL part is unused and in its original packaging.
Return procedure for BZX8450-C22VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C22VL Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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