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Nexperia USA Inc. BZX38450-B8V2X
- Part No.:
- BZX38450-B8V2X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B8V2X.pdf
- Description:
- DIODE ZENER 8.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,949
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Product details
Overview
BZX38450-B8V2X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and biasing in ultra-low-power circuits. It provides a nominal 8.2 V regulation at 50 µA test current, with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and 3.2 mV/K temperature coefficient - enabling stable operation in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the BZX38450-B8V2X datasheet, BZX38450-B8V2X pinout, BZX38450-B8V2X application, or BZX38450-B8V2X equivalent, key selection criteria include its 50 µA regulation point, 80 Ω dynamic impedance, 0.9 V forward voltage at 10 mA, and SOD323 thermal resistance of 110 K/W to solder point - critical for compact, thermally constrained designs.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA, making it suitable for micropower bias networks where quiescent current must remain below 100 µA. Its intentional minor leakage rise (per AN90031) reduces noise and improves switching transients in analog front-ends.
The device exhibits a positive temperature coefficient of +3.2 mV/K and 150 pF junction capacitance at 0 V, supporting stable DC reference generation while limiting high-frequency coupling in mixed-signal PCB layouts. Thermal resistance from junction to solder point is 110 K/W, enabling reliable operation on standard FR4 with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 8.2 V at IZ = 50 µA - defines precise DC reference level for low-bias circuits |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming |
| Differential Resistance | 80 Ω at IZ = 5 mA - limits output voltage shift under small load variations |
| Temperature Coefficient | +3.2 mV/K - enables predictable drift compensation in temperature-sensitive references |
| Forward Voltage | 0.9 V at IF = 10 mA - supports use as low-drop rectifier or clamp in dual-polarity rails |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets maximum continuous power in standard SOD323 mounting |
| Junction-to-Solder-Point Rth | 110 K/W - determines thermal rise above PCB copper during sustained conduction |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - enables use in nanoampere-bias circuits like CMOS reset monitors |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise in ADC reference buffers |
| Compact thermal path | Rth(j-sp) = 110 K/W - allows direct thermal coupling to PCB copper without thermal vias |
| Stable temperature behavior | +3.2 mV/K coefficient - simplifies two-point calibration in industrial temperature sensors |
| Low junction capacitance | 150 pF at 0 V - minimizes signal coupling in high-impedance op-amp feedback networks |
Applications
| Portable Gas Sensor Biasing | IoT Node Voltage Reference |
|---|---|
|
Use Scenario: Powering electrochemical gas sensor electrodes in battery-operated air quality monitors. IC Role / Device Role / Timing Role: Zener diode providing stable 8.2 V bias to sensor working electrode amplifier. Use Value: 50 µA regulation current extends coin-cell life beyond 5 years; ±2 % tolerance ensures repeatable sensor calibration across production batches. |
Use Scenario: Supplying reference voltage to 12-bit SAR ADC in NB-IoT endpoint devices. IC Role / Device Role / Timing Role: Precision shunt reference establishing VREF for analog input scaling. Use Value: 80 Ω dynamic impedance limits code error to <0.5 LSB under 10 µA load variation; 150 pF capacitance avoids sampling-time settling issues. |
| Wearable Heart Rate Monitor Front-End | Industrial Thermocouple Cold-Junction Compensation |
|
Use Scenario: Biasing photodiode transimpedance amplifier in optical pulse oximetry circuit. IC Role / Device Role / Timing Role: Low-noise Zener setting common-mode voltage for AC-coupled signal chain. Use Value: Optimized leakage profile per AN90031 suppresses 1/f noise in sub-10 Hz physiological band; SOD323 footprint fits within 2.5 mm² wearable PCB area budget. |
Use Scenario: Generating stable reference for cold-junction compensation amplifier in RTD/thermocouple modules. IC Role / Device Role / Timing Role: Temperature-compensated shunt reference tracking ambient sensor drift. Use Value: +3.2 mV/K coefficient matches typical thermistor beta values; 300 mW rating supports derated operation over −40 °C to +85 °C industrial range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C8V2 | ±5 % tolerance, higher 150 Ω rdiff at 5 mA, same 8.2 V nominal | Accepts wider output variation; less suitable for high-resolution ADC references | Select when cost sensitivity outweighs voltage accuracy requirements |
| MMSZ5231B | Same 8.2 V nominal but ±5 % tolerance, 150 Ω rdiff, SOD-123 package (larger footprint) | Higher thermal resistance (250 K/W) limits power handling in dense layouts | Choose only if legacy SOD-123 footprint compatibility is mandatory |
Compared with BZX38450-B8V2X, the BZX384-C8V2 trades accuracy for cost in non-critical biasing, while MMSZ5231B sacrifices thermal performance and board space efficiency - making the BZX38450-B8V2X optimal for space-constrained, precision low-power systems.
Availability
BZX38450-B8V2X is available at Aetrix Electronics and suitable for portable medical devices, wireless sensor networks, and industrial data loggers requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-B8V2X 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 energy-efficient components.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications demanding microampere-level regulation stability.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-B8V2X?
The device is rated for nominal 8.2 V Zener voltage at 50 µA, with minimum breakdown voltage of 8.04 V and maximum of 8.36 V under those conditions. Absolute maximum reverse voltage is not defined - operation beyond VZ + 10 % risks irreversible degradation due to thermal runaway.
Can BZX38450-B8V2X be used in forward conduction mode?
Yes - it exhibits 0.9 V forward voltage at 10 mA, making it suitable as a low-drop clamping diode or polarity protection element. However, its forward characteristics are not characterized beyond 10 mA, and continuous forward current must remain below 250 mA per absolute maximum ratings.
How does the "intentional minor rise of leakage current" affect circuit design?
This feature, detailed in application note AN90031, introduces controlled IR increase near breakdown to reduce 1/f noise and improve transient response. It benefits high-precision analog front-ends but requires verification that the elevated leakage (e.g., 0.1 µA at 7.5 V) does not disturb ultra-high-impedance nodes.
Is BZX38450-B8V2X suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-grade screening, temperature range validation (−40 °C to +125 °C), or PPAP documentation. Nexperia explicitly states non-automotive qualification in the legal disclaimers; use only in consumer, industrial, or medical equipment meeting its specified −55 °C to +150 °C operating range.
BZX38450-B8V2X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-B8V2X FAQ
1.How can I place an order for BZX38450-B8V2X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B8V2X 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 BZX38450-B8V2X reliable?
The price and inventory of BZX38450-B8V2X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B8V2X is usually 5 days.
3.What payment methods are accepted for BZX38450-B8V2X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B8V2X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B8V2X?
BZX38450-B8V2X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B8V2X 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 BZX38450-B8V2X?
For technical support, including BZX38450-B8V2X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B8V2X requirements.
6.How does Aetrix verify that BZX38450-B8V2X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B8V2X 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 BZX38450-B8V2X meets industry standards.
7.What is the process for return or replacement of BZX38450-B8V2X?
All BZX38450-B8V2X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B8V2X, 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 BZX38450-B8V2X part is unused and in its original packaging.
Return procedure for BZX38450-B8V2X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B8V2X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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