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Nexperia USA Inc. BZX38450-B16X
- Part No.:
- BZX38450-B16X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B16X.pdf
- Description:
- DIODE ZENER 16V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,073
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Product details
Overview
BZX38450-B16X 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 16 V regulation at 50 µA test current, with ±2 % tolerance, 200 Ω differential resistance at 5 mA, and 0.05 µA reverse leakage at rated voltage - optimized for portable battery-powered systems requiring stable low-bias operation.
For engineers reviewing the BZX38450-B16X datasheet, BZX38450-B16X pinout, BZX38450-B16X application, or BZX38450-B16X equivalent, key selection criteria include its 16 V nominal Zener voltage, 300 mW total power dissipation, SOD323 surface-mount footprint, cathode/anode polarity marking, and low 50 µA test current specification for minimal quiescent draw.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across a wide range of reverse currents (50 µA to 5 mA), with temperature coefficient of +10.4 mV/K and junction-to-ambient thermal resistance of 415 K/W on FR4 PCB. Its low 50 µA test current enables accurate regulation in micro-power sensor biasing and standby-mode references.
The BZX38450-B16X belongs to the "B" tolerance series (±2 %), features 150 Ω max differential resistance at 1 mA, and exhibits 12.1 V minimum / 16.3 V maximum Zener voltage range at IZ = 50 µA - ensuring tight regulation under light-load conditions typical in IoT node power management and analog front-end calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.7 V to 16.3 V at IZ = 50 µA - defines precise regulation window for low-current reference design |
| Tolerance | ±2 % (B-series) - ensures predictable voltage accuracy without post-calibration in production |
| Differential Resistance (rdiff) | ≤ 200 Ω at IZ = 5 mA - limits output voltage drift under varying load current |
| Reverse Leakage (IR) | ≤ 0.05 µA at VR = 12.1 V - enables nanoampere-level standby current in battery-critical applications |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - supports use as low-drop rectifier or ESD clamp in signal path |
| Package | SOD323 (SC-76), 1.7 mm × 1.25 mm × 0.95 mm - enables high-density placement in space-constrained wearables and sensors |
Pinout & Package
SOD323 (SC-76) plastic surface-mount package with 2 leads, 1.3 mm pitch, and cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity mark (bar) identifies this terminal on PCB silkscreen |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces system quiescent current by >95 % vs. conventional 5 mA Zeners |
| Tight voltage tolerance | ±2 % (B-series) - eliminates need for external trimming in precision voltage monitor circuits |
| Optimized noise performance | Intentional minor leakage rise per AN90031 - suppresses switching transients in ADC reference buffers |
| Thermal stability | +10.4 mV/K temperature coefficient - enables predictable drift compensation in temperature-sensitive analog stages |
| Robust surge rating | 40 W non-repetitive peak reverse power (100 µs pulse) - withstands ESD events up to IEC 61000-4-2 Level 4 |
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: Shunt voltage reference regulating sensor bridge supply at 16 V with <100 nA standby draw. Use Value: Extends coin-cell lifetime beyond 5 years by limiting bias current to 50 µA while maintaining ±0.3 % output stability over −40 °C to +85 °C. |
Use Scenario: Generating clean 16 V reference for 16-bit SAR ADCs in handheld test equipment. IC Role / Device Role / Timing Role: Low-noise Zener source decoupled from noisy digital supply rails via RC filter. Use Value: Achieves <0.5 LSB integral nonlinearity error by suppressing 1/f noise and minimizing rdiff-induced droop during conversion cycles. |
| IoT Node Power Sequencing | EEPROM Write Protection |
|
Use Scenario: Enabling controlled wake-up of BLE SoCs only when main rail exceeds 16 V threshold. IC Role / Device Role / Timing Role: Precision voltage detector using Zener breakdown to trigger comparator input. Use Value: Delivers 10 mV hysteresis-free threshold detection with <1 µs response time, eliminating external resistive dividers and saving PCB area. |
Use Scenario: Preventing accidental EEPROM writes during brown-out conditions in industrial controllers. IC Role / Device Role / Timing Role: Clamp-based undervoltage lockout (UVLO) element tied to microcontroller reset pin. Use Value: Guarantees reliable write-protection down to 15.7 V with zero external components - reducing BOM count and failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5245BS | 16 V nominal, ±5 % tolerance, 100 Ω rdiff at 20 mA, specified at 20 mA test current | Higher test current increases quiescent draw; better dynamic regulation but unsuitable for sub-µA standby | Select when higher current drive (>1 mA) and tighter dynamic impedance are required over ultra-low IQ |
| Vishay BZX384-C16 | 16 V nominal, ±5 % tolerance, same SOD323 package, 0.1 µA IR at 12.1 V | Looser tolerance and higher leakage reduce accuracy in precision references but improve cost-effectiveness for general-purpose clamping | Select for non-critical voltage clamping where ±5 % variation and 2× leakage are acceptable |
Compared with BZX38450-B16X, MMBZ5245BS trades ultra-low bias current for superior dynamic regulation at higher loads, while BZX384-C16 sacrifices accuracy and leakage performance for broader availability and lower unit cost in non-precision roles.
Availability
BZX38450-B16X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference design, and IoT node power sequencing requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-B16X 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency and miniaturization.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-constrained applications demanding nanoscale leakage control and stable low-test-current regulation.
FAQ
What is the maximum continuous power dissipation for BZX38450-B16X?
The BZX38450-B16X has a total power dissipation limit of 300 mW at ambient temperature ≤ 25 °C when mounted on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 2.4 mW/°C based on its 415 K/W junction-to-ambient thermal resistance.
How does the 50 µA test current affect circuit design?
Specifying regulation at 50 µA allows the diode to maintain accurate 16 V output with negligible quiescent current - critical for multi-year battery life in IoT sensors. Designers must ensure bias networks deliver ≥50 µA under worst-case low-voltage conditions to guarantee regulation onset.
Can BZX38450-B16X be used in place of a 1N4744A?
No - the 1N4744A is a 14 V, 1 W through-hole Zener with 20 mA test current and ±5 % tolerance. BZX38450-B16X is a 16 V, 300 mW SMD device with ±2 % tolerance and 50 µA test current. Direct substitution would cause overvoltage stress and violate thermal and current requirements.
What is the significance of the 'B' suffix in BZX38450-B16X?
The 'B' denotes the ±2 % Zener voltage tolerance grade per IEC 60062, distinguishing it from the 'C' grade (±5 %). This tighter tolerance enables use in precision reference applications without post-production calibration, such as medical sensor excitation and metrology-grade voltage monitors.
BZX38450-B16X 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):
- 16 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.1 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-B16X FAQ
1.How can I place an order for BZX38450-B16X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B16X 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-B16X reliable?
The price and inventory of BZX38450-B16X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B16X is usually 5 days.
3.What payment methods are accepted for BZX38450-B16X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B16X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B16X?
BZX38450-B16X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B16X 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-B16X?
For technical support, including BZX38450-B16X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B16X requirements.
6.How does Aetrix verify that BZX38450-B16X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B16X 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-B16X meets industry standards.
7.What is the process for return or replacement of BZX38450-B16X?
All BZX38450-B16X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B16X, 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-B16X part is unused and in its original packaging.
Return procedure for BZX38450-B16X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B16X Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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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
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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