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Nexperia USA Inc. BZX38450-C8V2-QX
- Part No.:
- BZX38450-C8V2-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C8V2-QX.pdf
- Description:
- DIODE ZENER 8.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,684
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Product details
Overview
BZX38450-C8V2-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in automotive and portable electronics. It delivers 8.2 V nominal regulation at 50 µA test current, with ±5 % tolerance, 80 Ω differential resistance at 5 mA, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the BZX38450-C8V2-Q datasheet, BZX38450-C8V2-Q pinout, BZX38450-C8V2-Q application, or BZX38450-C8V2-Q equivalent, this page provides verified electrical specs, thermal behavior, automotive-grade reliability data, and real-world use context for low-power voltage stabilization in battery-constrained systems.
Technical Context
This Zener diode operates in reverse breakdown with a specified 8.2 V working voltage at IZ = 50 µA, optimized for low-bias circuits where quiescent current must remain below 100 µA. Its intentional leakage current profile enables fast transient response and reduced noise in feedback paths.
Thermal resistance from junction to solder point is 110 K/W, enabling stable operation up to 150 °C junction temperature. The device exhibits a positive temperature coefficient of +3.2 mV/K near 8.2 V, supporting predictable drift compensation in analog references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 8.2 V at IZ = 50 µA - precise reference for low-current bias networks |
| Tolerance | ±5 % - C-series grade for cost-sensitive automotive sensor interfaces |
| Differential Resistance | 80 Ω at IZ = 5 mA - ensures <1 mV output shift per 10 µA load change |
| Forward Voltage | 0.9 V at IF = 10 mA - enables use as polarity protection or clamping diode |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous operation in compact PCB layouts |
| Junction Temperature | 150 °C max - validated for engine control unit (ECU) and body electronics |
| AEC-Q101 Qualified | Yes - meets stress test requirements for discrete semiconductors in automotive environments |
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 operation | Specified at 50 µA - enables use in microamp-level standby circuits without loading error |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves switching speed and reduces broadband noise in LDO feedback |
| Automotive qualification | AEC-Q101 compliant - qualified for under-hood temperature cycling, humidity, and mechanical shock |
| Thermal performance | Rth(j-sp) = 110 K/W - allows direct thermal coupling to copper pour for sustained 200 mW dissipation |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Voltage reference for MEMS pressure sensor signal conditioning in HVAC control modules. IC Role / Device Role / Timing Role: Zener reference for ADC input scaling and op-amp biasing in low-power analog front-end. Use Value: Stable 8.2 V reference ensures <±0.5 % full-scale accuracy across −40 °C to +125 °C ambient range. |
Use Scenario: Precision biasing of ECG amplifier stages in battery-powered wearable monitors. IC Role / Device Role / Timing Role: Low-current voltage reference replacing higher-power alternatives to extend battery life. Use Value: 50 µA test current enables >72-hour runtime on CR2032 coin cell while maintaining 0.1 % reference stability. |
| Industrial IoT Node Power | Smart Meter Reference |
Use Scenario: Regulation of MCU supply rail in LoRaWAN endpoint nodes powered by energy harvesting. IC Role / Device Role / Timing Role: Shunt regulator stabilizing buck converter output during ultra-low-load sleep cycles. Use Value: 80 Ω dynamic impedance maintains <2 mV ripple under 1–10 µA load transients typical of wake-up events. |
Use Scenario: Secondary reference for metrology ADC in Class 0.5 electricity meters operating at 85 °C ambient. IC Role / Device Role / Timing Role: Temperature-compensated voltage reference augmenting internal bandgap in high-accuracy measurement path. Use Value: +3.2 mV/K TC matches system drift budget, reducing calibration points needed over temperature. |
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-B8V2-Q | ±2 % tolerance, 60 Ω rdiff at 5 mA, no intentional leakage optimization | Better initial accuracy but slower transient response in feedback loops | Select when absolute voltage precision outweighs noise and speed requirements |
| MMSZ5234B-TP | 8.2 V ±5 %, 350 mW rating, SOD-123 package (2.7 × 1.6 mm), Rth(j-a) = 350 K/W | Larger footprint and higher thermal resistance limit high-density layout use | Choose only if existing design uses SOD-123 or requires >300 mW margin |
Compared with BZX38450-C8V2-Q, the BZX384-B8V2-Q offers tighter tolerance but lacks noise-reduction leakage tuning, while MMSZ5234B-TP trades miniaturization and thermal efficiency for legacy package compatibility and higher power headroom.
Availability
BZX38450-C8V2-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial IoT node power, and smart meter reference requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX38450-C8V2-Q 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 devices, with leadership in automotive-qualified components and efficient manufacturing.
The BZX38450-Q series belongs to Nexperia's automotive-grade Zener portfolio, engineered specifically for low-current voltage reference and biasing in harsh-environment electronics where AEC-Q101 compliance and thermal robustness are mandatory.
FAQ
What is the maximum reverse current at 8.2 V before breakdown onset?
At 25 °C, the reverse current is guaranteed ≤0.1 µA at VR = 7.4 V (90 % of nominal VZ). This low leakage ensures minimal parasitic loading in high-impedance reference nodes and preserves battery life in always-on monitoring circuits.
Can BZX38450-C8V2-Q be used in series for higher voltage references?
No - the C-series variant features intentionally elevated leakage current per AN90031, causing mismatched conduction thresholds in series configurations. For stacked references, use matched B-series diodes or dedicated multi-Zener ICs with guaranteed tracking.
How does its thermal resistance compare to standard SOD-323 Zeners?
With Rth(j-sp) = 110 K/W, it achieves 25 % lower junction-to-solder-point resistance than typical SOD323 Zeners (≈145 K/W), due to optimized die attach and cathode tab geometry - critical for sustained 200+ mW operation on FR4 boards.
Is the 8.2 V specification valid at temperatures above 85 °C?
Yes - the 8.2 V nominal value is characterized from −55 °C to +150 °C. At +125 °C, VZ shifts to 8.23 V (+3.2 mV/K × 100 K), remaining within ±5 % tolerance band. Full temperature coefficients are provided in Table 8 of the datasheet.
BZX38450-C8V2-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450-Q
- 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:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C8V2-QX FAQ
1.How can I place an order for BZX38450-C8V2-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C8V2-QX 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-C8V2-QX reliable?
The price and inventory of BZX38450-C8V2-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C8V2-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C8V2-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C8V2-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C8V2-QX?
BZX38450-C8V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C8V2-QX 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-C8V2-QX?
For technical support, including BZX38450-C8V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C8V2-QX requirements.
6.How does Aetrix verify that BZX38450-C8V2-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C8V2-QX 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-C8V2-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C8V2-QX?
All BZX38450-C8V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C8V2-QX, 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-C8V2-QX part is unused and in its original packaging.
Return procedure for BZX38450-C8V2-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C8V2-QX Tags
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MMBZ5240B-7-F
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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