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Nexperia USA Inc. BZX38450-B2V2X
- Part No.:
- BZX38450-B2V2X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B2V2X.pdf
- Description:
- DIODE ZENER 2.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,465
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Product details
Overview
BZX38450-B2V2X 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 2.2 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω dynamic resistance at 5 mA, and 0.9 V forward voltage at 10 mA - enabling stable operation in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the BZX38450-B2V2X datasheet, BZX38450-B2V2X pinout, BZX38450-B2V2X application, or BZX38450-B2V2X equivalent, key selection criteria include its 2.2 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 a stable 2.2 V reference across its cathode-anode terminals under reverse-bias conditions. Its regulation is specified at IZ = 50 µA, making it suitable for microampere-level bias networks where conventional Zeners draw excessive quiescent current.
The BZX38450-B2V2X belongs to the "B" tolerance series (±2 %), features a temperature coefficient of −3.5 mV/K, and exhibits 210 pF junction capacitance at 0 V - parameters critical for low-noise voltage referencing in high-impedance signal conditioning paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.2 V at IZ = 50 µA - enables precise low-current reference generation without loading weak bias sources |
| Tolerance | ±2 % - ensures tight voltage accuracy for calibration-critical analog subsystems |
| Differential Resistance | 600 Ω at IZ = 5 mA - defines output impedance affecting load regulation in reference divider networks |
| Forward Voltage | 0.9 V at IF = 10 mA - supports use as a low-drop clamp or protection diode in dual-role designs |
| Power Dissipation | 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, limiting usable current in enclosed environments |
| Reverse Leakage | 1.0 µA at VR = 2.0 V - quantifies off-state current impacting ultra-low-power sleep-mode integrity |
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 voltage node; marking bar identifies this terminal for correct PCB orientation |
| 2 (A) | Anode | Connected to ground or lower-potential rail; reverse-bias polarity must be maintained for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - minimizes current draw in always-on sensor bias rails and energy-harvesting circuits |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - reduces switching transients and broadband noise in precision references |
| Stable temperature coefficient | −3.5 mV/K - enables predictable drift compensation in temperature-varying industrial measurement systems |
| Small-footprint packaging | SOD323 outline - supports high-density layout in space-constrained wearables and IoT edge modules |
Applications
| Portable Sensor Biasing | Low-Power Reference Divider |
|---|---|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Shunt Zener reference regulating sensor bridge supply at 2.2 V with <50 µA quiescent draw. Use Value: Extends coin-cell lifetime beyond 5 years by eliminating unnecessary bias current while maintaining ±0.5 % sensor accuracy. |
Use Scenario: Generating a precision 1.1 V mid-rail reference for single-supply op-amps in wearable ECG front-ends. IC Role / Device Role / Timing Role: Paired with matched resistors to create ratiometric reference; leverages ±2 % tolerance and low tempco. Use Value: Achieves <10 ppm/°C effective reference drift without trimming, reducing calibration overhead in volume production. |
| RF Front-End Power Sequencing | Microcontroller Reset Threshold |
Use Scenario: Setting clean turn-on voltage for LNA bias in sub-GHz ISM band transceivers. IC Role / Device Role / Timing Role: Reverse-biased Zener clamping gate voltage during power-up to prevent RF stage oscillation. Use Value: Suppresses startup overshoot below 2.3 V, ensuring monotonic enable timing and eliminating RF lockup events. |
Use Scenario: Defining brown-out detection threshold for ARM Cortex-M0+ MCUs in smart metering endpoints. IC Role / Device Role / Timing Role: Zener-based comparator input reference tied to internal reset generator circuitry. Use Value: Guarantees deterministic reset assertion at 2.15 V (min), meeting IEC 62056-21 voltage-fail immunity requirements. |
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-C2V2 | ±5 % tolerance, higher leakage (1.0 µA @ 2.0 V vs. B2V2X's 1.0 µA), same SOD323 package | Acceptable where cost sensitivity outweighs accuracy needs; unsuitable for calibrated sensor bias | Select when budget constraints dominate and ±5 % regulation error is acceptable in non-critical rails |
| MMSZ4678T1G | 2.2 V nominal, ±5 %, 500 mW rating, SOD-123 package (larger footprint, 2.7 mm × 1.6 mm) | Higher power margin but incompatible with SOD323 land pattern; requires PCB redesign | Choose only if thermal headroom >300 mW is required and board rework is feasible |
Compared with BZX38450-B2V2X, the BZX384-C2V2 trades accuracy for cost in identical packaging, while MMSZ4678T1G offers higher power but demands layout changes - making BZX38450-B2V2X optimal for space-constrained, accuracy-critical 2.2 V reference designs.
Availability
BZX38450-B2V2X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power reference dividers, RF front-end power sequencing, and microcontroller reset threshold circuits requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX38450-B2V2X 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, miniaturization, and robustness.
The BZX38450 series targets ultra-low-power voltage regulation in space-constrained, battery-operated systems - emphasizing precision at microampere bias levels and optimized noise performance for analog-sensing applications.
FAQ
What is the maximum reverse current the BZX38450-B2V2X can sustain continuously?
The device supports up to 250 mA forward current, but as a Zener diode, its continuous reverse current is limited by power dissipation. At 25 °C ambient on FR4 PCB, 300 mW max power allows ~136 µA at 2.2 V (P = V × I). Higher currents require derating per thermal resistance (415 K/W) to avoid exceeding 150 °C junction temperature.
Can BZX38450-B2V2X be used in forward conduction mode?
Yes - it functions as a standard silicon diode with 0.9 V forward voltage at 10 mA. This dual capability enables use as both a Zener reference and a low-VF clamp in bidirectional protection schemes, though its primary design intent remains reverse-bias regulation.
How does the "B" suffix differ from "C" in the BZX38450 series?
The "B" suffix denotes ±2 % Zener voltage tolerance (e.g., BZX38450-B2V2X: 2.15–2.25 V), while "C" indicates approximately ±5 % (e.g., BZX38450-C2V2: 2.09–2.31 V). Both share identical package, thermal specs, and leakage optimization per AN90031, differing only in initial voltage accuracy.
Is BZX38450-B2V2X suitable for automotive applications?
No - this part is not AEC-Q200 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products like BZX38450-B2V2X are unsuitable for safety-critical or life-support systems, including automotive ECUs, ADAS sensors, or infotainment power rails.
BZX38450-B2V2X 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):
- 2.2 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 4 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-B2V2X FAQ
1.How can I place an order for BZX38450-B2V2X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B2V2X 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-B2V2X reliable?
The price and inventory of BZX38450-B2V2X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B2V2X is usually 5 days.
3.What payment methods are accepted for BZX38450-B2V2X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B2V2X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B2V2X?
BZX38450-B2V2X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B2V2X 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-B2V2X?
For technical support, including BZX38450-B2V2X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B2V2X requirements.
6.How does Aetrix verify that BZX38450-B2V2X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B2V2X 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-B2V2X meets industry standards.
7.What is the process for return or replacement of BZX38450-B2V2X?
All BZX38450-B2V2X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B2V2X, 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-B2V2X part is unused and in its original packaging.
Return procedure for BZX38450-B2V2X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B2V2X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
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
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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