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Nexperia USA Inc. BZX38450-C3V0-QF
- Part No.:
- BZX38450-C3V0-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C3V0-QF.pdf
- Description:
- DIODE ZENER 3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,780
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Product details
Overview
BZX38450-C3V0-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, providing precise 3.0 V regulation at 50 µA test current with ±5 % tolerance, 0.9 V forward voltage at 10 mA, and 300 mW power dissipation - optimized for battery-powered sensor nodes and automotive microcontroller reference rails.
For engineers reviewing the BZX38450-C3V0-Q datasheet, BZX38450-C3V0-Q pinout, BZX38450-C3V0-Q application, or BZX38450-C3V0-Q equivalent, key selection criteria include nominal Zener voltage (3.0 V), tight tolerance (±5 %), ultra-low test current (50 µA), AEC-Q101 qualification, and thermal resistance (Rth(j-a) = 415 K/W).
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable output by conducting reverse current above its specified Zener breakdown voltage of 2.85–3.15 V. Its differential resistance is ≤600 Ω at IZ = 50 µA and ≤100 Ω at IZ = 5 mA, enabling predictable regulation under light-load conditions.
Designed for low-bias operation, it features intentional leakage current optimization per AN90031 to reduce noise and improve switching response. It meets AEC-Q101 stress testing requirements and supports ambient temperatures from −55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.85 V to 3.15 V at IZ = 50 µA - defines regulation threshold with ±5 % tolerance for stable low-power biasing |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA - ensures minimal conduction loss when used in polarity-sensitive protection paths |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance rdiff | ≤ 600 Ω at IZ = 50 µA; ≤ 100 Ω at IZ = 5 mA - determines regulation stiffness and load transient response |
| Reverse Current IR | ≤ 0.8 µA at VR = 1.0 V - confirms low leakage below knee voltage, critical for battery drain minimization |
| Thermal Resistance Rth(j-a) | 415 K/W in free air - quantifies junction-to-ambient heat rise per watt, guiding thermal layout on unheatsinked boards |
| Temperature Coefficient SZ | −3.5 mV/K - indicates negative drift with temperature, requiring compensation in precision analog references |
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; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in µA-level standby circuits without compromising regulation accuracy |
| AEC-Q101 qualification | Qualified for automotive applications - ensures reliability under temperature cycling, humidity, and mechanical shock per discrete semiconductor standard |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces high-frequency noise and improves transient response vs. standard Zeners |
| Tight voltage tolerance | ±5 % (C-series) - provides predictable regulation window for cost-sensitive designs where ±2 % is unnecessary |
| Small-footprint SMD package | SOD323 outline - supports high-density PCB layouts and automated assembly while maintaining thermal performance |
Applications
| Automotive Microcontroller Reference | IoT Sensor Bias Rail |
|---|---|
|
Use Scenario: Providing stable 3.0 V reference for ADCs and internal voltage monitors in automotive body control modules. IC Role / Device Role / Timing Role: Shunt voltage regulator supplying clean, low-noise bias to MCU analog peripherals. Use Value: AEC-Q101 qualification ensures operation across −40 °C to +125 °C engine bay environments with <0.8 µA leakage at 1 V reverse bias. |
Use Scenario: Generating fixed 3.0 V supply for MEMS accelerometers and environmental sensors in battery-powered asset trackers. IC Role / Device Role / Timing Role: Low-current Zener reference establishing precision analog operating point. Use Value: 50 µA test current enables regulation down to nanoampere sleep modes, extending coin-cell life beyond 5 years. |
| Portable Medical Wearable Input Protection | Industrial PLC Signal Conditioning |
|
Use Scenario: Clamping ESD transients and limiting input voltage to 3.0 V on biopotential amplifier front-ends. IC Role / Device Role / Timing Role: Bidirectional overvoltage protector leveraging Zener breakdown and low forward drop. Use Value: 0.9 V forward voltage at 10 mA ensures minimal signal distortion during positive excursions; SOD323 footprint fits tight medical PCBs. |
Use Scenario: Stabilizing 3.0 V bias for isolated analog input channel op-amps in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Precision shunt reference compensating for supply ripple in noisy industrial environments. Use Value: 100 Ω dynamic impedance at 5 mA delivers <10 mV regulation error under 1 mA load variation, meeting IEC 61000-4-5 surge immunity requirements. |
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-B3V0-Q | ±2 % tolerance (vs. ±5 %); higher rdiff (≤1000 Ω at 50 µA) | Better initial accuracy but less stable under temperature drift (SZ = −3.5 mV/K same) | Select when tighter voltage binning is required and leakage budget allows higher test current sensitivity |
| MMSZ5226ET1G | Same 3.0 V nominal, ±5 %, but SOD-123 package (2.7 × 1.6 mm) and higher Ptot (500 mW) | Larger footprint and higher power handling; not AEC-Q101 qualified | Choose for non-automotive industrial use where thermal margin >300 mW is needed and board space permits larger package |
Compared with BZX38450-C3V0-Q, the BZX384-B3V0-Q offers tighter tolerance at the cost of higher dynamic impedance, while MMSZ5226ET1G trades AEC-Q101 compliance and compact size for greater power headroom and legacy footprint compatibility.
Availability
BZX38450-C3V0-Q is available at Aetrix Electronics and suitable for automotive electronics, portable medical devices, and industrial sensor interfaces requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-C3V0-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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, low-noise voltage regulation in space-constrained and thermally demanding automotive and portable applications.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-C3V0-Q?
The nominal Zener voltage is 3.0 V with a guaranteed range of 2.85 V to 3.15 V at IZ = 50 µA. Breakdown begins within this band; operation above 3.15 V under regulation current will increase power dissipation linearly. Absolute maximum reverse voltage is not defined - sustained operation beyond VZ(max) risks thermal runaway if power limits are exceeded.
Can BZX38450-C3V0-Q be used in forward-bias mode as a regular diode?
Yes - it exhibits ≤0.9 V forward voltage at 10 mA, matching typical silicon diode behavior. However, its primary design intent is reverse-bias Zener regulation; forward conduction is characterized only at 10 mA and lacks detailed curve data beyond that point, so it should not replace purpose-built rectifiers or signal diodes in high-speed or high-current roles.
How does the "C" suffix differ from "B" in the BZX38450-Q series?
The "C" suffix denotes ±5 % tolerance and incorporates an intentional, controlled increase in leakage current per AN90031 to enhance switching speed and reduce noise. The "B" suffix indicates ±2 % tolerance and standard leakage characteristics. Both share identical package, power rating, and thermal specs, but C-series prioritizes dynamic performance over absolute voltage accuracy.
Is BZX38450-C3V0-Q compatible with lead-free reflow soldering profiles?
Yes - it is qualified for standard lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C. The SOD323 footprint in Figure 10 specifies 0.5 mm solder land width and 0.6 mm solder resist opening, supporting IPC-7351B Class B density. Thermal resistance values assume tin-plated copper on FR4 PCB.
BZX38450-C3V0-QF 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):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 800 nA @ 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-C3V0-QF FAQ
1.How can I place an order for BZX38450-C3V0-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C3V0-QF 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-C3V0-QF reliable?
The price and inventory of BZX38450-C3V0-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C3V0-QF is usually 5 days.
3.What payment methods are accepted for BZX38450-C3V0-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C3V0-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C3V0-QF?
BZX38450-C3V0-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C3V0-QF 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-C3V0-QF?
For technical support, including BZX38450-C3V0-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C3V0-QF requirements.
6.How does Aetrix verify that BZX38450-C3V0-QF is sourced from the original manufacturer or authorized distributors?
All BZX38450-C3V0-QF 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-C3V0-QF meets industry standards.
7.What is the process for return or replacement of BZX38450-C3V0-QF?
All BZX38450-C3V0-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C3V0-QF, 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-C3V0-QF part is unused and in its original packaging.
Return procedure for BZX38450-C3V0-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C3V0-QF Tags
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