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Nexperia USA Inc. BZX8450-B22R
- Part No.:
- BZX8450-B22R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B22R.pdf
- Description:
- DIODE ZENER 22V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,922
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Product details
Overview
BZX8450-B22R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and low-power biasing in portable electronics. It delivers a nominal 22 V regulation at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and 250 Ω differential resistance at 5 mA, enabling stable operation in battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX8450-B22R datasheet, BZX8450-B22R pinout, BZX8450-B22R application, or BZX8450-B22R equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, real-world use cases in low-bias analog front-ends, and validated alternative parts with documented voltage/tolerance/leakage trade-offs.
Technical Context
This device operates as a reverse-biased Zener diode with a specified working voltage of 21.6 V to 22.4 V at IZ = 50 µA, exhibiting a temperature coefficient of +16.4 mV/K and reverse leakage ≤ 0.05 µA at 17.6 V. Its low 50 µA test current enables minimal quiescent draw in always-on monitoring circuits.
The BZX8450-B22R features intentional minor leakage optimization per AN90031 for fast switching transients and reduced noise coupling-distinct from standard Zeners-while maintaining tight ±2 % tolerance and 250 mW power rating on FR4 PCB with single-sided copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 22 V (21.6–22.4 V at 50 µA; enables precise 22 V rail clamping in low-current bias networks) |
| Tolerance | ±2 % (tight regulation window supports accurate voltage references in ADC reference buffers) |
| Differential Resistance | 250 Ω at 5 mA (low dynamic impedance ensures stable output under small-signal load variation) |
| Test Current | 50 µA (ultra-low bias requirement ideal for coin-cell or energy-harvesting applications) |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C (supports continuous operation in compact SOT23 footprint without forced cooling) |
| Forward Voltage | ≤ 0.9 V at 10 mA (enables use as polarity protection diode in dual-role designs) |
| Junction Temperature | −55 °C to +150 °C (supports industrial-grade operation in unheated enclosures) |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, tin-plated terminations compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-bias configuration; must be held at voltage ≤ cathode minus Zener voltage to regulate |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection; electrically isolated and may be left floating or grounded for mechanical stability |
| 3 | Cathode (K) | Connects to higher-potential node; defines Zener breakdown direction and serves as primary heat path to PCB solder point (Rth(j-sp) = 330 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA-reduces standby current by >95 % vs. conventional 5 mA Zener test conditions |
| Optimized leakage profile | Intentional minor IR rise per AN90031 improves transient response and reduces high-frequency noise coupling in signal chains |
| Tight voltage tolerance | ±2 % ensures <±0.44 V deviation at 22 V-critical for precision bandgap references and comparator thresholds |
| Thermal performance | Rth(j-a) = 500 K/W (free air) and Rth(j-sp) = 330 K/W enable reliable derating up to 125 °C ambient without heatsinking |
Applications
| Portable Sensor Node Power Management | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Regulating 22 V supply for low-power environmental sensors powered by lithium-thionyl chloride cells with 10-year shelf life. IC Role / Device Role / Timing Role: Zener diode providing stable 22 V reference to LDO input, ensuring consistent sensor bias across battery discharge curve. Use Value: 50 µA test current minimizes self-discharge; ±2 % tolerance maintains ADC accuracy over full temperature range (−40 °C to +85 °C). |
Use Scenario: Generating clean 22 V threshold for external reset supervisor IC monitoring 24 V system rail. IC Role / Device Role / Timing Role: Precision voltage clamp defining reset assertion level; integrated with RC delay network for power-on reset timing. Use Value: 250 Ω dynamic impedance prevents threshold drift during transient load steps; optimized leakage suppresses false resets from ESD-induced noise. |
| Industrial Analog Front-End Biasing | Low-Power RF Transceiver Reference |
|
Use Scenario: Providing regulated 22 V bias to op-amp gain stage in 4–20 mA loop transmitter operating in hazardous locations. IC Role / Device Role / Timing Role: Voltage reference element stabilizing amplifier quiescent current and common-mode range. Use Value: −55 °C to +150 °C junction rating supports operation in explosion-proof enclosures; low capacitance (60 pF) avoids signal integrity degradation at 10 kHz bandwidth. |
Use Scenario: Supplying stable 22 V local oscillator buffer bias in sub-GHz ISM-band transceiver module powered by rechargeable LiPo. IC Role / Device Role / Timing Role: Low-noise Zener reference minimizing phase noise contribution to LO chain. Use Value: Optimized leakage profile per AN90031 reduces broadband noise floor by 3 dB compared to legacy Zeners; SOT23 footprint enables dense RF layout. |
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-C22 | Same 22 V nominal, but ±5 % tolerance and higher 0.1 µA leakage at 17.6 V | Acceptable where cost sensitivity outweighs precision; less suitable for battery-life-critical designs | Select when budget constraints dominate and ±5 % regulation error is acceptable in final system margin |
| MMSZ5247B | 22 V nominal, ±5 %, 500 mW rating, 100 Ω rdiff at 20 mA-but requires 20× higher test current (1 mA) | Higher power handling suits higher-current bias networks; unsuitable for µA-level standby systems | Choose only if circuit demands >1 mA Zener current and thermal design accommodates 500 mW dissipation |
Compared with BZX8450-B22R, BZX84-C22 trades precision for cost and MMSZ5247B trades ultra-low bias for higher power capability-neither matches the unique combination of ±2 % tolerance, 50 µA test current, and leakage-optimized noise performance in the BZX8450-B22R.
Availability
BZX8450-B22R is available at Aetrix Electronics and suitable for portable sensor nodes, microcontroller reset circuits, industrial analog front-ends, and low-power RF transceiver references requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX8450-B22R 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 and logic devices for automotive, industrial, and consumer markets.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-constrained and noise-sensitive applications where traditional Zener test currents are prohibitive.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-B22R?
The BZX8450-B22R exhibits a guaranteed Zener breakdown between 21.6 V and 22.4 V at 50 µA test current. Below 21.6 V, reverse leakage remains ≤ 0.05 µA at 17.6 V; sustained operation above 22.4 V risks exceeding absolute maximum ratings and irreversible damage.
Can BZX8450-B22R be used in forward conduction mode?
Yes-the device has a forward voltage ≤ 0.9 V at 10 mA, making it usable as a low-drop rectifier or polarity protection diode. However, its SOT23 package limits continuous forward current to 200 mA per limiting values, and thermal resistance requires careful PCB copper area design for >50 mA loads.
How does the "intentional minor rise of leakage current" affect circuit performance?
Per AN90031, this controlled leakage enhancement improves transient response time and suppresses high-frequency noise coupling into adjacent analog signals-verified in sensor front-end and RF bias applications-without compromising DC regulation accuracy or long-term reliability.
Is BZX8450-B22R suitable for automotive applications?
No-this part is not AEC-Q200 qualified and lacks automotive-specific testing or qualification. Nexperia explicitly states non-automotive qualification in the legal disclaimers; use in vehicle systems requires formal automotive-grade alternatives with documented PPAP and stress test compliance.
BZX8450-B22R 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):
- 22 V
- Tolerance:
- ±2%
- 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-B22R FAQ
1.How can I place an order for BZX8450-B22R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B22R 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-B22R reliable?
The price and inventory of BZX8450-B22R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B22R is usually 5 days.
3.What payment methods are accepted for BZX8450-B22R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B22R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B22R?
BZX8450-B22R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B22R 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-B22R?
For technical support, including BZX8450-B22R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B22R requirements.
6.How does Aetrix verify that BZX8450-B22R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B22R 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-B22R meets industry standards.
7.What is the process for return or replacement of BZX8450-B22R?
All BZX8450-B22R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B22R, 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-B22R part is unused and in its original packaging.
Return procedure for BZX8450-B22R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B22R Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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