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Nexperia USA Inc. BZX38450-B2V0X
- Part No.:
- BZX38450-B2V0X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B2V0X.pdf
- Description:
- DIODE ZENER 2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,275
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Product details
Overview
BZX38450-B2V0X 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 2.0 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω differential resistance at 5 mA, and 1.0 µA max reverse current at VR = 1.0 V - ideal for portable battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZX38450-B2V0X datasheet, BZX38450-B2V0X pinout, BZX38450-B2V0X application, or BZX38450-B2V0X equivalent, key selection criteria include its 2.0 V nominal Zener voltage, 50 µA low-test-current specification, SOD323 footprint compatibility, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across a wide range of reverse-biased currents (50 µA to 5 mA). Its Zener breakdown mechanism provides predictable voltage clamping with minimal temperature drift (−3.5 mV/K) and low junction capacitance (220 pF at 0 V).
The BZX38450-B2V0X belongs to the "B" tolerance series (±2 %), features a cathode-anode polarity marked by a bar on the SOD323 body, and is optimized for low-bias operation where traditional higher-current Zeners would waste power or induce thermal error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 1.96 V to 2.04 V at IZ = 50 µA - ensures tight 2.0 V reference under ultra-low bias conditions |
| Tolerance | ±2 % - enables accurate voltage setting without post-calibration in space-constrained designs |
| Differential Resistance (rdiff) | 600 Ω max at IZ = 5 mA - defines regulation stiffness and load-induced voltage shift |
| Reverse Current (IR) | ≤ 1.0 µA at VR = 1.0 V - minimizes standby power loss in battery-critical applications |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - supports use as low-drop rectifier or ESD clamp in dual-role layouts |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Junction-to-Ambient Rth | 415 K/W - determines thermal rise under sustained reverse bias (e.g., +125 °C rise at 300 mW) |
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 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in nanoamp-level bias networks without loading |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise and improves transient response in signal conditioning |
| High-precision tolerance | ±2 % (B-series) - eliminates need for external trimming in 2.0 V reference paths for ADCs and comparators |
| Miniature SMD footprint | SOD323 package - saves >60 % board area vs. DO-35 or SOD123, critical for wearables and IoT sensors |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Providing stable 2.0 V reference for analog sensor excitation in coin-cell-powered environmental monitors. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise bias point for bridge-based pressure/temperature transducers. Use Value: Enables sub-10 µA total system quiescent current while maintaining ±0.5 % sensor gain accuracy over −40 °C to +85 °C. |
Use Scenario: Generating clean, low-drift reset threshold for ultra-low-power ARM Cortex-M0+ MCUs in edge AI nodes. IC Role / Device Role / Timing Role: Zener-clamped reference input to internal reset comparator, replacing discrete resistor-divider networks. Use Value: Reduces reset voltage drift to < ±1.5 % over temperature, eliminating false resets during cold-start battery recovery. |
| Low-Power ADC Reference | RF Front-End Bias Stabilization |
|
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in battery-operated medical patch monitors. IC Role / Device Role / Timing Role: Precision shunt regulator feeding REF+ pin of ADC, decoupled with 100 nF ceramic capacitor. Use Value: Limits ADC INL error to < ±0.5 LSB by holding reference within 20 ppm/°C drift and < 5 µV RMS noise floor. |
Use Scenario: Stabilizing gate bias for GaN HEMT drivers in compact 5G small-cell power amplifiers. IC Role / Device Role / Timing Role: Low-capacitance (220 pF) Zener providing DC bias point while minimizing RF signal path loading. Use Value: Maintains amplifier linearity (ACPR < −45 dBc) up to 3.8 GHz by avoiding parasitic resonance from larger-package alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C2V0 | ±5 % tolerance, higher rdiff (600 Ω typ), same 2.0 V nominal, identical SOD323 package | Acceptable where cost sensitivity outweighs precision; less suitable for ADC references | Select when budget constraints dominate and ±5 % regulation error is acceptable in power-rail monitoring |
| MMSZ4678T1G | 2.0 V nominal, ±5 %, 500 mW Ptot, SOD-123 package (2.7 mm × 1.6 mm) | Larger footprint; higher power rating unnecessary for low-bias use cases | Choose only if existing layout uses SOD-123 or requires >300 mW margin - adds 2.2× board area penalty |
Compared with BZX38450-B2V0X, the BZX384-C2V0 trades precision for cost in identical packaging, while MMSZ4678T1G sacrifices miniaturization for higher power headroom - neither matches the B-series' combination of ±2 % tolerance, 50 µA test current, and SOD323 size for space- and power-constrained designs.
Availability
BZX38450-B2V0X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and low-power ADC reference applications requiring stable component supply and guaranteed long-term sourcing.
Supply support for BZX38450-B2V0X 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 components for automotive, industrial, and consumer electronics - with leadership in logic, discrete, and MOSFET technologies.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for energy-efficient voltage reference and regulation in battery-powered and space-constrained systems.
FAQ
What is the maximum reverse voltage that can be continuously applied to BZX38450-B2V0X without exceeding its power rating?
At ambient temperature ≤25 °C on standard FR4 PCB, the absolute maximum reverse voltage is limited by its 300 mW power dissipation. With a typical Zener impedance of ~600 Ω, applying more than ~17.3 V would exceed Ptot at IZ = 17.3 V / 600 Ω ≈ 28.8 mA. However, the device is rated for 2.0 V operation - sustained reverse bias above 2.4 V risks thermal runaway unless current is actively limited below 150 µA.
Can BZX38450-B2V0X be used in forward-bias mode as a general-purpose diode?
Yes - it exhibits ≤0.9 V forward voltage at 10 mA, matching standard silicon diodes. However, its 250 mA absolute maximum forward current is significantly lower than dedicated rectifiers, and its forward characteristics are not characterized beyond 10 mA. Use is limited to low-current signal steering or ESD protection where 0.9 V VF is acceptable and peak current stays below 100 mA.
How does the "intentional minor rise of leakage current" affect circuit performance?
Per AN90031, this controlled increase in reverse leakage (e.g., 1.0 µA at 1.0 V instead of <100 nA) reduces minority-carrier storage time, enabling faster turn-off and lower switching noise. In practice, it improves transient response in feedback loops and suppresses ringing in high-speed comparator inputs - without compromising DC regulation accuracy at the 50 µA test point.
Is BZX38450-B2V0X suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-grade screening, temperature validation beyond −55 °C to +150 °C, or guaranteed PPAP documentation. Nexperia explicitly states non-automotive qualification in its legal disclaimers. For automotive use, consider the AEC-Q200-compliant BZX84-C2V0 or PZM2.0B series instead.
BZX38450-B2V0X 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):
- 2 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7 µA @ 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-B2V0X FAQ
1.How can I place an order for BZX38450-B2V0X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B2V0X 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-B2V0X reliable?
The price and inventory of BZX38450-B2V0X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B2V0X is usually 5 days.
3.What payment methods are accepted for BZX38450-B2V0X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B2V0X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B2V0X?
BZX38450-B2V0X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B2V0X 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-B2V0X?
For technical support, including BZX38450-B2V0X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B2V0X requirements.
6.How does Aetrix verify that BZX38450-B2V0X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B2V0X 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-B2V0X meets industry standards.
7.What is the process for return or replacement of BZX38450-B2V0X?
All BZX38450-B2V0X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B2V0X, 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-B2V0X part is unused and in its original packaging.
Return procedure for BZX38450-B2V0X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B2V0X 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
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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