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Nexperia USA Inc. BZX384-C3V3-QX
- Part No.:
- BZX384-C3V3-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C3V3-QX.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,735
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Product details
Overview
BZX384-C3V3-Q from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.3 V nominal breakdown at 5 mA, with 300 mW total power dissipation and qualified to AEC-Q101 for automotive use. It provides stable reference voltage in low-power biasing, overvoltage protection, and signal clamping circuits.
For engineers reviewing the BZX384-C3V3-Q datasheet, BZX384-C3V3-Q pinout, BZX384-C3V3-Q application, or BZX384-C3V3-Q equivalent, key selection criteria include its 3.10–3.50 V Zener voltage range at IZ = 5 mA, ≤5 μA reverse current at VR = 1 V, 600 Ω max differential resistance, −3.5 to 0.0 mV/K temperature coefficient, and automotive-grade reliability under transient surge conditions.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals. Its regulation performance is defined by tight voltage tolerance (±5 %), low dynamic impedance (≤600 Ω at 5 mA), and controlled temperature coefficient (−3.5 to 0.0 mV/K).
Designed for surface-mount applications on FR4 PCBs, it supports non-repetitive peak reverse power dissipation up to 40 W (100 μs pulse) and junction temperatures up to 150 °C. The device meets AEC-Q101 stress test requirements for automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.10 V to 3.50 V at IZ = 5 mA - defines usable regulation window for precision biasing |
| Reverse Current (IR) | ≤5 μA at VR = 1 V - ensures minimal leakage in standby or high-impedance sensing nodes |
| Differential Resistance (rdif) | ≤600 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power | 40 W (100 μs square wave) - enables transient overvoltage suppression without failure |
| Temperature Coefficient (SZ) | −3.5 to 0.0 mV/K - quantifies voltage drift per degree Celsius under regulation current |
| Junction Temperature (Tj) | −65 °C to +150 °C - specifies full operational thermal range for automotive under-hood use |
Pinout & Package
The BZX384-C3V3-Q is housed in a SOD323 (SC-76) surface-mount plastic package with two leads: anode (A) and cathode (K). The cathode is marked by a bar on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| ±5 % Zener voltage tolerance | Enables cost-effective regulation where tighter tolerances are not required |
| Low thermal resistance (Rth(j-sp) = 110 K/W) | Improves heat transfer from junction to solder point for reliable operation at elevated ambient |
| Non-repetitive peak reverse current (IZSM = 6.0 A) | Supports robust ESD and surge immunity in interface protection circuits |
| SOD323 footprint compatibility | Matches industry-standard 2.3 × 1.35 mm land pattern for automated assembly |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 3.3 V reference for analog sensor signal conditioning in engine coolant temperature modules. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, absorbing excess current to hold bias node at precise voltage. Use Value: Maintains ADC input accuracy despite battery voltage fluctuations between 9 V and 16 V. |
Use Scenario: Clamping D+ and D− lines to prevent >3.6 V transients from damaging USB PHY circuitry during hot-plug events. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that conducts only when line voltage exceeds 3.5 V threshold. Use Value: Limits transient energy to <100 nJ per event, preserving PHY ESD robustness without signal distortion. |
| Industrial PLC Input Protection | Low-Power MCU Reset Circuit |
|
Use Scenario: Protecting 24 V digital input channels against induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Standby Zener element that activates during overvoltage to divert current away from optocoupler input. Use Value: Absorbs 40 W surge pulses (100 μs) without degradation, extending channel lifetime beyond 100,000 cycles. |
Use Scenario: Generating clean reset signal for ARM Cortex-M0 microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Reference element in RC-based reset generator, defining trip voltage for POR circuit. Use Value: Ensures reset assertion below 2.97 V with ±5 % tolerance, meeting MCU's 2.7–3.6 V operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V3-Q | ±2 % tolerance (3.23–3.37 V); lower rdif (≤95 Ω) | Better regulation stability in precision analog references | Select when tighter voltage control outweighs cost sensitivity |
| MMSZ4685T1G | ±5 % tolerance (3.14–3.47 V); higher Ptot (500 mW); SOD-123 package | Higher power margin but larger footprint and different thermal profile | Choose for legacy board redesigns requiring same voltage but higher surge headroom |
Compared with BZX384-C3V3-Q, the BZX384-B3V3-Q offers improved voltage accuracy at the expense of slightly higher unit cost, while MMSZ4685T1G trades compact SOD323 size for greater power handling and less stringent automotive qualification.
Availability
BZX384-C3V3-Q is available at Aetrix Electronics and suitable for automotive sensor modules, industrial I/O protection, and low-power embedded reset circuits requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX384-C3V3-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 specializing in high-performance, high-reliability discrete and logic devices, with leadership in automotive-qualified components.
The BZX384-Q series targets automotive and industrial voltage regulation needs, delivering AEC-Q101-compliant Zener diodes optimized for space-constrained, thermally demanding applications.
FAQ
What is the maximum continuous forward current rating for BZX384-C3V3-Q?
The device is not intended for continuous forward conduction. Its absolute maximum forward current is 250 mA, but typical operation is in reverse-biased Zener mode. Forward voltage is specified at 0.9 V (IF = 10 mA) and 1.1 V (IF = 100 mA), with pulse testing conditions (tp ≤ 100 μs, duty cycle ≤ 2 %) applied.
Can BZX384-C3V3-Q be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients below ~5 V, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device or external series resistors with individual diodes, verified via thermal simulation.
How does the ±5 % tolerance affect regulation accuracy in a 3.3 V reference circuit?
At 5 mA test current, the actual Zener voltage ranges from 3.10 V to 3.50 V. Combined with temperature coefficient (−3.5 to 0.0 mV/K), worst-case drift over −40 °C to +125 °C adds ±0.58 V, yielding a total variation window of 2.52 V to 4.08 V - acceptable for non-critical biasing but insufficient for precision ADC references.
Is the SOD323 package compatible with standard reflow profiles for lead-free soldering?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The recommended peak temperature is 260 °C (max), with time above liquidus of 60–150 seconds. Thermal resistance data (Rth(j-a) = 415 K/W) assumes standard FR4 PCB with single-sided 1 oz copper and tin-plated finish.
BZX384-C3V3-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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 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-C3V3-QX FAQ
1.How can I place an order for BZX384-C3V3-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C3V3-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-C3V3-QX reliable?
The price and inventory of BZX384-C3V3-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-C3V3-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C3V3-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C3V3-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C3V3-QX?
BZX384-C3V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C3V3-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-C3V3-QX?
For technical support, including BZX384-C3V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C3V3-QX requirements.
6.How does Aetrix verify that BZX384-C3V3-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C3V3-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-C3V3-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C3V3-QX?
All BZX384-C3V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C3V3-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-C3V3-QX part is unused and in its original packaging.
Return procedure for BZX384-C3V3-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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