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Nexperia USA Inc. BZX38450-C8V2X
- Part No.:
- BZX38450-C8V2X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C8V2X.pdf
- Description:
- DIODE ZENER 8.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,861
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Product details
Overview
BZX38450-C8V2X 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 delivers 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-C8V2X datasheet, BZX38450-C8V2X pinout, BZX38450-C8V2X application, or BZX38450-C8V2X equivalent, key selection criteria include its 50 µA regulation point, 80 Ω dynamic impedance, 0.9 V forward voltage at 10 mA, 300 mW power rating, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with specified characteristics at Tj = 25 °C, using a low test current (IZ = 50 µA) to minimize self-heating and support microamp-level bias networks. Its differential resistance of 80 Ω at IZ = 5 mA ensures predictable regulation under light load variation.
The device features an intentionally elevated reverse leakage current compared to standard B-series variants - per AN90031 - to improve switching speed and reduce high-frequency noise in signal conditioning paths. Thermal resistance from junction to ambient is 415 K/W on FR4 PCB, limiting continuous dissipation to 300 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 8.2 V at IZ = 50 µA - defines primary regulation point for low-bias reference design |
| Tolerance | ±2 % - enables tight voltage margin control in precision analog supply rails |
| Differential Resistance | 80 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient | +3.2 mV/K - quantifies drift over temperature; supports thermal stability analysis |
| Forward Voltage | 0.9 V at IF = 10 mA - sets minimum forward bias headroom in dual-direction protection schemes |
| Max Power Dissipation | 300 mW at Tamb ≤ 25 °C - constrains usable current range in compact PCB layouts |
| Reverse Capacitance | 150 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise coupling in RF-adjacent circuits |
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 nanoamp-to-microamp bias chains without significant error |
| Optimized leakage profile | Intentionally elevated IR vs. B-series - reduces switching transients and broadband noise in ADC references |
| Stable thermal coefficient | +3.2 mV/K - allows predictable compensation in temperature-critical voltage references |
| Compact SMD footprint | SOD323 outline - supports high-density layout in space-constrained wearables and IoT modules |
| Controlled capacitance | 150 pF at 0 V - minimizes loading on high-impedance sensor outputs and op-amp feedback paths |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown as a two-terminal shunt voltage reference. Use Value: 50 µA regulation point matches sensor bias requirements; ±2 % tolerance ensures measurement accuracy within 0.16% full-scale error budget. |
Use Scenario: Generating precise 8.2 V reference for 16-bit SAR ADCs in handheld test equipment. IC Role / Device Role / Timing Role: Low-noise shunt reference stabilizing ADC's internal reference divider network. Use Value: Optimized leakage reduces switching noise coupling into reference input; 80 Ω rdiff limits reference droop under dynamic load steps. |
| IoT Node Power Rail Clamping | Microcontroller Reset Circuitry |
|
Use Scenario: Clamping 3.3 V LDO output against transient overvoltage in NB-IoT modem modules. IC Role / Device Role / Timing Role: Shunt protector activated only during overvoltage events above 8.2 V threshold. Use Value: 300 mW power rating sustains short-duration surges; fast leakage response suppresses ringing in 50 ns ESD pulses. |
Use Scenario: Setting brown-out detection threshold for ARM Cortex-M0+ MCUs in smart home controllers. IC Role / Device Role / Timing Role: Precision voltage threshold element in discrete reset comparator circuit. Use Value: +3.2 mV/K TC aligns with silicon bandgap drift, maintaining consistent reset point across −40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38450-B8V2 | Same 8.2 V nominal, but ±5 % tolerance and lower leakage current | Higher voltage uncertainty; less effective for noise reduction in sensitive analog paths | Select when cost sensitivity outweighs precision and noise performance requirements |
| MMSZ5236B-TP | 8.2 V nominal, ±5 %, 100 Ω rdiff, 500 mW Ptot, SOD-123 package | Larger footprint; higher power handling but poorer thermal resistance (500 K/W) | Choose when board space permits larger package and higher surge energy absorption is needed |
Compared with BZX38450-C8V2X, the B-series variant trades regulation accuracy and noise performance for lower unit cost, while MMSZ5236B-TP offers greater surge robustness at the expense of size, thermal efficiency, and high-frequency behavior.
Availability
BZX38450-C8V2X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference design, and IoT node power rail clamping requiring stable component supply across extended production cycles.
Supply support for BZX38450-C8V2X 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 with strong emphasis on automotive and industrial applications.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and noise-sensitive analog systems where microamp-level regulation and optimized leakage behavior are critical.
FAQ
What is the maximum continuous reverse current for stable regulation?
The BZX38450-C8V2X maintains regulation up to 5 mA at 25 °C, where differential resistance is specified at 80 Ω. At higher currents, self-heating increases junction temperature, shifting VZ due to its +3.2 mV/K coefficient; sustained operation above 5 mA requires derating per thermal resistance data (Rth(j-a) = 415 K/W).
How does the C-series leakage optimization affect circuit noise?
The C-series uses intentional minor leakage rise - documented in AN90031 - to reduce minority-carrier storage time, thereby suppressing high-frequency ringing and broadband noise during turn-on/turn-off transitions. This improves SNR in precision analog front-ends without requiring external filtering components.
Can this Zener be used in forward-biased configuration?
Yes: forward voltage is specified at 0.9 V @ 10 mA, making it suitable as a low-drop clamp or level shifter. However, forward conduction lacks the tight tolerance and temperature stability of reverse breakdown mode; use only where ±10 % voltage accuracy suffices and thermal effects are negligible.
Is the SOD323 package compatible with standard reflow profiles?
Yes - Nexperia provides validated reflow soldering footprints (Fig. 10) for SOD323, supporting JEDEC J-STD-020 moisture sensitivity level 1. Peak temperature must not exceed 260 °C for ≤ 30 seconds; thermal pad clearance and solder paste volume must follow the 0.5 mm × 0.6 mm land pattern to prevent tombstoning.
BZX38450-C8V2X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- 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-C8V2X FAQ
1.How can I place an order for BZX38450-C8V2X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C8V2X 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-C8V2X reliable?
The price and inventory of BZX38450-C8V2X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C8V2X is usually 5 days.
3.What payment methods are accepted for BZX38450-C8V2X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C8V2X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C8V2X?
BZX38450-C8V2X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C8V2X 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-C8V2X?
For technical support, including BZX38450-C8V2X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C8V2X requirements.
6.How does Aetrix verify that BZX38450-C8V2X is sourced from the original manufacturer or authorized distributors?
All BZX38450-C8V2X 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-C8V2X meets industry standards.
7.What is the process for return or replacement of BZX38450-C8V2X?
All BZX38450-C8V2X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C8V2X, 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-C8V2X part is unused and in its original packaging.
Return procedure for BZX38450-C8V2X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C8V2X Tags
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MM5Z5V1ST1G
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