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Nexperia USA Inc. BZX38450-C2V2-QX
- Part No.:
- BZX38450-C2V2-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C2V2-QX.pdf
- Description:
- DIODE ZENER 2.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,424
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Product details
Overview
BZX38450-C2V2-Q 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 impedance at 5 mA, and 1.0 µA reverse leakage at VR = 2.0 V - optimized for battery-powered sensor nodes and automotive microcontroller reset circuits.
For engineers reviewing the BZX38450-C2V2-Q datasheet, BZX38450-C2V2-Q pinout, BZX38450-C2V2-Q application, or BZX38450-C2V2-Q equivalent, key selection criteria include its AEC-Q101 qualification, low 50 µA regulation test current, tight ±2 % tolerance, and thermal resistance of 110 K/W to solder point - critical for thermally constrained automotive PCBs and portable IoT endpoints.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.09–2.31 V at 50 µA, exhibiting a negative temperature coefficient of −3.5 mV/K and differential resistance ≤600 Ω at 5 mA. Its low 1.0 µA reverse current at VR = 2.0 V enables stable operation in high-impedance bias networks.
The device uses silicon planar epitaxial technology, qualified per AEC-Q101 for automotive use, and features intentional minor leakage optimization per AN90031 for fast switching transients and reduced noise coupling in power-rail monitoring paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.2 V at IZ = 50 µA - sets precise reference level for low-bias analog circuitry |
| Voltage Tolerance | ±2 % - ensures tight regulation across production batches without trimming |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - limits output voltage shift under load variation |
| Reverse Leakage Current | 1.0 µA max at VR = 2.0 V - minimizes quiescent current drain in always-on systems |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports operation on standard FR4 PCB without heatsinking |
| Junction Temperature | −55 °C to +150 °C - enables deployment in under-hood automotive environments |
| Package | SOD323 (SC-76), 1.7 mm × 1.25 mm × 0.95 mm - fits high-density layouts with 1.3 mm lead pitch |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with two leads: cathode marked by bar on body, anode unmarked. Body dimensions: 1.7 mm × 1.25 mm × 0.95 mm; lead pitch: 1.3 mm; thermal resistance to solder point: 110 K/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage rail; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or current-limiting resistor; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Low test current operation | Specified at 50 µA - reduces bias network power consumption by >95 % vs. 5 mA Zeners |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves transient response and suppresses switching noise |
| Tight voltage tolerance | ±2 % (C-series) - eliminates need for post-assembly calibration in precision references |
| Thermal performance | Rth(j-sp) = 110 K/W - enables stable regulation in thermally isolated PCB zones |
Applications
| Automotive Microcontroller Reset Circuit | Portable Gas Sensor Bias Network |
|---|---|
Use Scenario: Provides stable 2.2 V reference to enable reset IC threshold detection in engine control units. IC Role / Device Role / Timing Role: Zener voltage reference establishing precise reset trip point for automotive-grade supervisory ICs. Use Value: AEC-Q101 qualification and −55 °C to +150 °C operation ensure reliable reset assertion across full vehicle thermal envelope. |
Use Scenario: Supplies regulated bias to electrochemical gas sensing elements in battery-powered air quality monitors. IC Role / Device Role / Timing Role: Low-current voltage reference enabling <1 µA standby current while maintaining sensor linearity. Use Value: 50 µA regulation current and 1.0 µA leakage minimize battery drain, extending field-deployed sensor life to >5 years. |
| Industrial PLC Analog Input Protection | Medical Wearable Signal Conditioning |
Use Scenario: Clamps and regulates input reference voltage for 16-bit ADC front-end in programmable logic controllers. IC Role / Device Role / Timing Role: Precision shunt reference stabilizing ADC reference rail against supply ripple and thermal drift. Use Value: ±2 % tolerance and −3.5 mV/K tempco reduce gain error to <0.5 % over −40 °C to +85 °C operating range. |
Use Scenario: Sets bias point for ultra-low-power op-amp stages in ECG front-end ASICs powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-leakage Zener reference enabling rail-to-rail signal swing with sub-µA quiescent current. Use Value: 600 Ω dynamic impedance maintains reference stability despite varying sensor loading in multi-channel acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX38450-B2V2-Q | Same 2.2 V nominal voltage but ±5 % tolerance (vs. ±2 %) | Higher voltage variation acceptable in non-critical biasing where cost sensitivity outweighs precision | Select when tighter tolerance is unnecessary and unit cost reduction is prioritized |
| MMSZ4684T1G | 2.2 V nominal, ±5 %, 500 mW rating, SOD-123 package (2.7 mm × 1.6 mm) | Larger footprint and higher power dissipation - suited for industrial boards with less density constraint | Choose if board layout allows larger package and higher thermal margin is required |
Compared with BZX38450-C2V2-Q, the B-series offers lower cost at ±5 % tolerance, while MMSZ4684T1G trades miniaturization for higher power handling and wider industry adoption - making the C2V2-Q optimal for space-constrained, AEC-Q101–mandated automotive and portable medical designs requiring ±2 % accuracy.
Availability
BZX38450-C2V2-Q is available at Aetrix Electronics and suitable for automotive electronics, portable medical sensors, and industrial PLC analog modules requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-C2V2-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 discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX38450-Q series belongs to Nexperia's AEC-Q101–qualified Zener diode portfolio, engineered specifically for low-current voltage regulation in automotive ECUs, battery management systems, and portable instrumentation where precision, size, and reliability are co-prioritized.
FAQ
What is the maximum forward voltage of BZX38450-C2V2-Q at 10 mA?
The maximum forward voltage is 0.9 V at IF = 10 mA, measured under pulse conditions (tp ≤ 300 µs, duty cycle ≤ 0.02). This value reflects typical silicon diode conduction behavior and confirms suitability for low-drop applications where forward conduction may occur during transient events.
Can BZX38450-C2V2-Q be used in place of a 2.2 V TL431-based shunt regulator?
No - the BZX38450-C2V2-Q is a passive Zener diode requiring external current limiting and offering no active feedback or adjustable output. Unlike the TL431, it lacks precision bandgap reference, adjustable threshold, or sink-current capability, making it appropriate only for fixed-voltage, low-current biasing-not programmable regulation.
Is the 50 µA test current mandatory for achieving 2.2 V regulation?
No - regulation occurs across a range of currents (50 µA to 5 mA), but the 2.2 V nominal value is defined at 50 µA per datasheet. At higher currents like 5 mA, voltage rises slightly (to ~2.25 V) due to dynamic resistance; design must account for this 20 mV shift in precision-sensitive applications.
How does the "C" suffix differ from "B" in the BZX38450-Q series?
The "C" suffix denotes ±2 % voltage tolerance and optimized leakage characteristics per AN90031 for fast switching and noise reduction. The "B" suffix indicates ±5 % tolerance and standard leakage - both share identical package, power rating, and thermal specs, but "C" is selected for high-precision, low-noise applications.
BZX38450-C2V2-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):
- 2.2 V
- Tolerance:
- ±5%
- 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:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C2V2-QX FAQ
1.How can I place an order for BZX38450-C2V2-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C2V2-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-C2V2-QX reliable?
The price and inventory of BZX38450-C2V2-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-C2V2-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C2V2-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C2V2-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C2V2-QX?
BZX38450-C2V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C2V2-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-C2V2-QX?
For technical support, including BZX38450-C2V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C2V2-QX requirements.
6.How does Aetrix verify that BZX38450-C2V2-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C2V2-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-C2V2-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C2V2-QX?
All BZX38450-C2V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C2V2-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-C2V2-QX part is unused and in its original packaging.
Return procedure for BZX38450-C2V2-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C2V2-QX Tags
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