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Nexperia USA Inc. BZX384-B3V3-QX
- Part No.:
- BZX384-B3V3-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B3V3-QX.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,960
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Product details
Overview
BZX384-B3V3-Q from Nexperia is a ±2 % 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 voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-B3V3-Q datasheet, BZX384-B3V3-Q pinout, BZX384-B3V3-Q application, or BZX384-B3V3-Q equivalent, this page delivers verified Zener voltage, differential resistance, reverse current, thermal resistance, and automotive qualification status - all critical for precision biasing, ESD clamp design, and board-level regulation in constrained layouts.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable 3.3 V regulation across load variations via controlled reverse-biased Zener breakdown. Its low 95 Ω typical differential resistance at 5 mA ensures minimal output voltage drift under dynamic current conditions.
Designed for surface-mount reliability in harsh environments, it features 150 °C maximum junction temperature, 415 K/W junction-to-ambient thermal resistance on FR4 PCB, and non-repetitive 40 W peak reverse power handling - enabling transient surge suppression in automotive ECUs and industrial sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 3.23 V to 3.37 V at IZ = 5 mA - defines tight regulation window for 3.3 V rail stabilization |
| Differential Resistance (rdif) | 95 Ω max at IZ = 5 mA - limits output voltage variation under load current changes |
| Reverse Current (IR) | 5 μA max at VR = 1 V - ensures low leakage in standby and battery-powered modes |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets continuous DC power limit on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 μs - supports ESD/ISO 7637-2 pulse clamping without failure |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in under-hood automotive and industrial ambient extremes |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Two-terminal SOD323 (SC-76) plastic surface-mount package with cathode marked by a bar on the top surface; compact 2.7 mm × 1.6 mm footprint ideal for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; reverse-bias terminal where Zener breakdown occurs |
| 2 (A) | Anode | Connected to ground or lower-potential reference; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % voltage tolerance | Enables precise 3.3 V reference without post-production trimming in cost-sensitive automotive modules |
| 300 mW power rating | Supports continuous regulation of microcontroller I/O biasing and sensor excitation circuits |
| AEC-Q101 qualification | Validates suitability for engine control units, body electronics, and ADAS domain controllers |
| Low 95 Ω differential resistance | Reduces output voltage deviation to < ±33 mV over ±1 mA load current swing |
| SOD323 package | Enables 0.5 mm pitch reflow soldering and fits within 2.7 mm × 1.6 mm board area |
Applications
| Automotive ECU Voltage Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 3.3 V bias for analog front-end op-amps and ADC references in engine control units. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply to precision analog circuitry. Use Value: Maintains < ±15 mV output deviation over −40 °C to +125 °C ambient, meeting ASIL-B functional safety margin requirements. |
Use Scenario: Clamping and biasing 4–20 mA transmitter loop interfaces in process automation transmitters. IC Role / Device Role / Timing Role: Low-leakage Zener clamp protecting input amplifiers from line transients. Use Value: 5 μA max reverse current at 1 V ensures < 50 nA error contribution to 24 V loop current measurement. |
| USB-C Port Overvoltage Protection | IoT Node Power-Rail Stabilization |
Use Scenario: Secondary overvoltage clamp on VBUS line after primary TVS, limiting to 3.3 V during fast-rising surges. IC Role / Device Role / Timing Role: Fast-response shunt limiter activated within 100 ns of overvoltage event. Use Value: 40 W non-repetitive peak power rating absorbs ISO 10605 30 kV ESD pulses without degradation. |
Use Scenario: Regulating 3.3 V supply for ultra-low-power BLE SoCs and environmental sensors in battery-operated nodes. IC Role / Device Role / Timing Role: Passive voltage reference stabilizing LDO feedback divider network. Use Value: 300 mW rating allows 90 mA max current draw while maintaining regulation, supporting burst-mode RF transmission. |
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-B3V3 | Same electrical specs but lacks AEC-Q101 qualification and automotive marking | Restricted to commercial-grade consumer or industrial equipment | Select only if automotive qualification is not required and cost is prioritized |
| MMSZ4685-TP | 3.3 V nominal, ±5 % tolerance, 500 mW Ptot, SOD-123 package | Larger footprint (3.7 mm × 1.6 mm), higher power but looser voltage accuracy | Choose when higher surge energy handling is needed and board space permits larger package |
Compared with BZX384-B3V3-Q, BZX384-B3V3 sacrifices automotive reliability for lower cost, while MMSZ4685-TP trades voltage precision and miniaturization for higher power and simpler procurement - making the Q-series optimal for space-constrained, safety-critical 3.3 V reference designs.
Availability
BZX384-B3V3-Q is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, USB-C port protection, and IoT node power-rail stabilization requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX384-B3V3-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 advanced packaging technologies.
The BZX384-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage reference and transient suppression in automotive power domains and industrial edge nodes.
FAQ
What is the maximum reverse current at 1 V for BZX384-B3V3-Q?
The maximum reverse current (IR) is 5 μA at VR = 1 V and Tj = 25 °C, measured per datasheet Table 8. This low leakage ensures minimal error in high-impedance bias networks and extends battery life in always-on IoT sensors.
Can BZX384-B3V3-Q be used in place of a 3.3 V LDO for regulation?
No - it is a shunt regulator requiring a series current-limiting resistor and cannot source load current like an LDO. It maintains voltage by sinking excess current; use only for low-current reference, clamping, or biasing where load current is externally supplied and stable.
Is the SOD323 package compatible with standard reflow profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The recommended footprint (Fig. 12) uses 0.5 mm wide solder lands with 0.6 mm spacing, supporting peak temperatures up to 260 °C for 10 seconds without delamination or voiding.
How does temperature affect the 3.3 V regulation accuracy?
The temperature coefficient (SZ) is −3.5 mV/K at IZ = 5 mA, meaning output voltage decreases ~11.6 mV over a 33 °C rise (e.g., 25 °C to 58 °C). For high-accuracy applications, derating or compensation is advised above 85 °C ambient.
BZX384-B3V3-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:
- ±2%
- 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-B3V3-QX FAQ
1.How can I place an order for BZX384-B3V3-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B3V3-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-B3V3-QX reliable?
The price and inventory of BZX384-B3V3-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-B3V3-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B3V3-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B3V3-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B3V3-QX?
BZX384-B3V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B3V3-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-B3V3-QX?
For technical support, including BZX384-B3V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B3V3-QX requirements.
6.How does Aetrix verify that BZX384-B3V3-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-B3V3-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-B3V3-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B3V3-QX?
All BZX384-B3V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B3V3-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-B3V3-QX part is unused and in its original packaging.
Return procedure for BZX384-B3V3-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B3V3-QX Tags
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