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Nexperia USA Inc. BZX384-C3V0-QX
- Part No.:
- BZX384-C3V0-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C3V0-QX.pdf
- Description:
- DIODE ZENER 3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,828
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Product details
Overview
BZX384-C3V0-Q from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.0 V nominal breakdown at 5 mA, with 600 Ω max differential resistance, 10 μA max reverse current at 1 V, and AEC-Q101 qualification for automotive power rail stabilization.
For engineers reviewing the BZX384-C3V0-Q datasheet, BZX384-C3V0-Q pinout, BZX384-C3V0-Q application, or BZX384-C3V0-Q equivalent, this part supports precision low-power voltage reference, overvoltage clamping in ECU sensor interfaces, and reverse-polarity protection circuits where tight thermal coefficient control and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its −3.5 mV/K temperature coefficient at 5 mA and 10 μA IR at VR = 1 V define its regulation stability in ambient ranges from −65 °C to +150 °C.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 300 mW total power dissipation at Tamb ≤ 25 °C and withstands non-repetitive 40 W surge pulses (tp = 100 μs), making it suitable for transient suppression in automotive microcontroller supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V at IZ = 5 mA - defines regulated output voltage in shunt configuration |
| Zener Tolerance | ±5 % - specifies maximum deviation from nominal voltage under specified test conditions |
| Differential Resistance | ≤600 Ω - determines voltage regulation stiffness against load current changes |
| Reverse Current | ≤10 μA at VR = 1 V - ensures low leakage before breakdown onset |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets continuous DC power handling limit on standard PCB |
| Peak Pulse Power | 40 W (tp = 100 μs) - enables transient overvoltage absorption without failure |
| Junction Temperature | −65 °C to +150 °C - supports operation in under-hood automotive environments |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| Low thermal resistance | Rth(j-sp) = 110 K/W - enables efficient heat transfer from junction to solder point |
| Stable temperature coefficient | −3.5 mV/K at IZ = 5 mA - minimizes voltage drift over operating temperature range |
| Small footprint | 1.35 mm × 0.85 mm outline - saves board space in dense automotive PCB layouts |
| High surge robustness | IZSM = 6.0 A peak reverse current - sustains ESD and load-dump transients per ISO 7637-2 |
Applications
| Automotive Sensor Interface | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Stabilizing reference voltage for analog sensor signal conditioning in engine coolant temperature modules. IC Role / Device Role / Timing Role: Zener shunt regulator providing fixed 3.0 V bias to op-amp input stage. Use Value: Maintains <±2 % output variation across −40 °C to +125 °C ambient, ensuring ADC accuracy within 12-bit resolution. |
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during cold cranking (6–9 V battery dips). IC Role / Device Role / Timing Role: Reverse-biased voltage clamp defining logic-high reset release point. Use Value: Delivers predictable 3.0 V trigger with <10 μA leakage, preventing false resets during slow-rising supply ramps. |
| USB Port Overvoltage Protection | Industrial CAN Transceiver Bias |
Use Scenario: Clamping induced surges on USB VBUS line in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance (450 pF) Zener absorbing fast transients before TVS activation. Use Value: Limits voltage to ≤3.3 V during 100 ns spikes, protecting downstream USB PHY without signal distortion. |
Use Scenario: Providing stable bias voltage for CANH/CANL common-mode termination in vehicle network nodes. IC Role / Device Role / Timing Role: Shunt regulator establishing precise 3.0 V reference for differential receiver offset calibration. Use Value: Enables <±5 mV common-mode tolerance over full temperature range, meeting ISO 11898-2 common-mode immunity specs. |
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 %; 95 Ω max rdif vs. 600 Ω | Higher precision needed in feedback loops of DC-DC converters | Select when tighter voltage stability outweighs cost sensitivity |
| MMSZ3V0T1G | ±5 % tolerance; 350 mW Ptot; SOD-123 package (larger footprint) | Requires rework of land pattern; higher thermal resistance (500 K/W) | Choose only if legacy SOD-123 layout prohibits SOD323 adoption |
Compared with BZX384-B3V0-Q, this part trades regulation precision for lower cost and broader tolerance margin; compared with MMSZ3V0T1G, it offers superior thermal performance and smaller footprint but requires updated PCB layout.
Availability
BZX384-C3V0-Q is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor modules, and consumer USB power management requiring stable component supply with AEC-Q101 compliance.
Supply support for BZX384-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 high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum continuous forward current rating for BZX384-C3V0-Q?
The device is not rated for continuous forward conduction; its absolute maximum forward current is 250 mA under pulsed conditions (tp ≤ 100 μs). In normal Zener operation, it functions exclusively in reverse breakdown, with forward voltage limited to 0.9 V at 10 mA per datasheet Table 1.
Can BZX384-C3V0-Q be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and mismatched breakdown voltages, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device like BZX84-C3V0 or discrete transistor-based shunt regulators.
How does the ±5 % tolerance affect circuit performance in a 3.3 V LDO feedback network?
At 3.0 V nominal, ±5 % yields 2.85–3.15 V Zener voltage, introducing up to ±4.5 % error in LDO output if used directly in the feedback divider. Compensation requires resistor trimming or selection of tighter-tolerance variants like BZX384-B3V0-Q for critical applications.
Is the SOD323 package compatible with standard reflow profiles for lead-free assembly?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The SOD323 footprint in Figure 12 supports peak temperatures up to 260 °C, with recommended solder paste stencil apertures of 0.5 mm × 0.6 mm per pad and 1.5 mm land length.
BZX384-C3V0-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384-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):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C3V0-QX FAQ
1.How can I place an order for BZX384-C3V0-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C3V0-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 BZX384-C3V0-QX reliable?
The price and inventory of BZX384-C3V0-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C3V0-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C3V0-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C3V0-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C3V0-QX?
BZX384-C3V0-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C3V0-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 BZX384-C3V0-QX?
For technical support, including BZX384-C3V0-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C3V0-QX requirements.
6.How does Aetrix verify that BZX384-C3V0-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C3V0-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 BZX384-C3V0-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C3V0-QX?
All BZX384-C3V0-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C3V0-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 BZX384-C3V0-QX part is unused and in its original packaging.
Return procedure for BZX384-C3V0-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C3V0-QX Tags
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