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Nexperia USA Inc. BZX38450-B9V1X
- Part No.:
- BZX38450-B9V1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B9V1X.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,136
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Product details
Overview
BZX38450-B9V1X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 9.1 V regulation at 50 µA test current, with ±2 % tolerance, 100 Ω differential resistance at 5 mA, and 3.8 mV/K temperature coefficient - enabling stable operation in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the BZX38450-B9V1X datasheet, BZX38450-B9V1X pinout, BZX38450-B9V1X application, or BZX38450-B9V1X equivalent, key selection criteria include low-test-current regulation accuracy, thermal stability in compact layouts, leakage-controlled switching behavior, and SOD323 footprint compatibility with high-density PCB designs.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA - optimized for minimal quiescent current draw in always-on monitoring circuits. Its intentional minor leakage rise (per AN90031) reduces switching noise during transient load transitions without compromising DC regulation fidelity.
The device exhibits a positive temperature coefficient of +3.8 mV/K at 9.1 V, ensuring predictable VZ drift over −55 °C to +150 °C ambient range. Thermal resistance from junction to solder point is 110 K/W, supporting reliable power dissipation up to 300 mW on standard FR4 PCBs with single-sided copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 9.1 V at IZ = 50 µA - enables accurate low-bias reference generation for ADCs and comparators |
| Tolerance | ±2 % - ensures tight voltage matching across production batches in calibration-critical circuits |
| Differential Resistance | 100 Ω at IZ = 5 mA - limits output impedance for stable regulation under small-signal load variations |
| Temperature Coefficient | +3.8 mV/K - provides predictable, linear VZ drift for compensated reference designs |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA - supports bidirectional clamping or dual-role use in protection circuits |
| Max Power Dissipation | 300 mW at Tamb ≤ 25 °C - defines safe continuous operating envelope on standard PCB layout |
| Junction Temperature Limit | 150 °C - sets upper thermal boundary for reliability in sealed or thermally constrained enclosures |
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 for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at 50 µA - minimizes standby current in energy-harvesting and coin-cell applications |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and EMI in fast-turning circuits |
| High-precision tolerance | ±2 % B-series grading - eliminates post-assembly trimming in factory-calibrated modules |
| Compact thermal path | Rth(j-sp) = 110 K/W - enables efficient heat transfer to PCB copper, critical for dense mixed-signal layouts |
Applications
| Portable Gas Sensor Calibration | IoT Node Reference Supply |
|---|---|
Use Scenario: Battery-powered electrochemical gas sensor requiring stable 9.1 V bias for analog front-end amplification and ADC reference. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed excitation voltage to sensor element and precision scaling for 16-bit SAR ADC. Use Value: ±2 % tolerance and +3.8 mV/K TC ensure <±10 mV total drift over −25 °C to +60 °C operating range, meeting ISO 20473 linearity requirements. |
Use Scenario: Sub-GHz LPWAN node with ultra-low-quiescent LDO and microcontroller, where supply rail must remain stable during deep-sleep wake-up bursts. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator maintaining clean 9.1 V intermediate rail for RF transceiver bias and crystal oscillator stability. Use Value: 50 µA test current and 100 Ω rdiff enable regulation within 15 mV under 100 µA load steps - preserving sleep-mode current budget. |
| Medical Wearable Signal Chain | Industrial Field Transmitter |
Use Scenario: Optical pulse oximeter using photodiode TIA with rail-to-rail input, requiring low-noise, low-drift reference independent of main supply. IC Role / Device Role / Timing Role: Precision Zener reference source for TIA feedback network and ADC reference buffer, decoupled from noisy digital rails. Use Value: Optimized leakage behavior suppresses switching noise coupling into analog signal path, improving SNR by ≥3 dB versus standard Zeners. |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation, needing stable internal reference unaffected by loop current variation. IC Role / Device Role / Timing Role: Shunt regulator establishing isolated 9.1 V domain for signal conditioning, DAC, and HART modem ICs. Use Value: 300 mW power rating and 150 °C Tj limit support continuous operation in 85 °C enclosure environments without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5240BS | 9.1 V, ±5 % tolerance, 150 Ω rdiff, rated at IZ = 20 mA | Higher test current increases standby power; less suitable for sub-100 µA systems | Select when cost sensitivity outweighs precision and ultra-low-IQ requirements |
| Vishay BZX384-C9V1 | 9.1 V, ±5 % tolerance, same SOD323 package but no intentional leakage optimization | Lacks AN90031 noise-reduction profile; higher switching transients in dynamic loads | Choose for legacy designs already qualified with C-series leakage characteristics |
Compared with BZX38450-B9V1X, MMBZ5240BS trades regulation precision and low-IQ performance for broader availability and lower unit cost, while BZX384-C9V1 matches form-factor but omits the fast-switching leakage tuning - making BZX38450-B9V1X optimal for new ultra-low-power, noise-sensitive designs.
Availability
BZX38450-B9V1X is available at Aetrix Electronics and suitable for portable medical devices, industrial loop-powered transmitters, IoT edge sensors, and battery-backed instrumentation requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-B9V1X 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 essential semiconductors - delivering discrete, logic, and MOSFET solutions engineered for efficiency, miniaturization, and robustness.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, developed specifically for voltage reference and biasing in space-constrained, energy-sensitive applications such as wearables, wireless sensors, and smart industrial nodes.
FAQ
What is the maximum reverse current (IR) at 8.0 V for BZX38450-B9V1X?
At 8.0 V reverse bias and Tj = 25 °C, the typical reverse current is 0.1 µA, with a maximum of 0.5 µA per the B-series electrical characteristics table. This ultra-low leakage ensures minimal parasitic loading on high-impedance reference nodes and preserves battery life in always-on circuits.
Can BZX38450-B9V1X be used in series with another Zener for higher voltage reference?
Yes - its matched thermal coefficient (+3.8 mV/K) and low rdiff (100 Ω) allow stable series stacking; however, total power dissipation must remain within 300 mW, and thermal coupling between devices should be minimized to avoid mutual TC drift. Derating by 20 % per added device is recommended.
Is the SOD323 package compatible with standard reflow profiles for lead-free assembly?
Yes - Nexperia specifies full compatibility with IPC/JEDEC J-STD-020D reflow profiles. The SOD323 outline supports peak temperatures up to 260 °C for ≤ 30 seconds, with recommended solder paste stencil apertures of 0.5 mm × 0.6 mm per pad per Figure 10 of the datasheet.
How does the "intentional minor rise of leakage current" improve performance?
Per Application Note AN90031, this controlled leakage increase reduces minority-carrier storage time during turn-off, lowering switching-induced voltage spikes and broadband noise - particularly beneficial in circuits sharing analog and digital grounds or driving capacitive loads like crystal oscillators.
BZX38450-B9V1X 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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.9 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-B9V1X FAQ
1.How can I place an order for BZX38450-B9V1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B9V1X 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-B9V1X reliable?
The price and inventory of BZX38450-B9V1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B9V1X is usually 5 days.
3.What payment methods are accepted for BZX38450-B9V1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B9V1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B9V1X?
BZX38450-B9V1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B9V1X 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-B9V1X?
For technical support, including BZX38450-B9V1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B9V1X requirements.
6.How does Aetrix verify that BZX38450-B9V1X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B9V1X 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-B9V1X meets industry standards.
7.What is the process for return or replacement of BZX38450-B9V1X?
All BZX38450-B9V1X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B9V1X, 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-B9V1X part is unused and in its original packaging.
Return procedure for BZX38450-B9V1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B9V1X Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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