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Nexperia USA Inc. BZX384-C3V9,115
- Part No.:
- BZX384-C3V9,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C3V9,115.pdf
- Description:
- DIODE ZENER 3.9V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:87,426
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Product details
Overview
BZX384-C3V9,115 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.9 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision low-power reference or clamp in power supply feedback paths, microcontroller I/O protection circuits, and analog sensor biasing networks.
For engineers reviewing the BZX384-C3V9,115 datasheet, BZX384-C3V9,115 pinout, BZX384-C3V9,115 application, or BZX384-C3V9,115 equivalent, this page delivers verified electrical parameters, thermal behavior under PCB mounting conditions, cathode/anode terminal mapping, and direct alternatives with documented tolerance and temperature coefficient differences.
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 ±5 % tolerance (C-series), 3.7 V to 4.1 V working voltage range at IZ = 5 mA, and −3.5 mV/K temperature coefficient define its regulation accuracy and thermal drift profile.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it exhibits Rth(j-a) = 415 K/W in free air and Rth(j-sp) = 110 K/W to solder point - critical for thermal design in space-constrained consumer and industrial modules where self-heating must remain below 150 °C junction limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 3.7 V to 4.1 V at IZ = 5 mA - defines usable regulation window for 3.3 V system references |
| Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C on standard FR4 - sets maximum continuous DC current to ~77 mA |
| Differential Resistance rdif | ≤90 Ω at IZ = 5 mA - determines output impedance and load regulation error |
| Reverse Current IR | ≤3 μA at VR = 1 V - ensures minimal leakage in standby or high-impedance sensing nodes |
| Temperature Coefficient SZ | −3.5 mV/K - quantifies voltage drift per degree Celsius rise in junction temperature |
| Non-repetitive Peak Power | 40 W for tp = 100 μs - supports transient overvoltage clamping without failure |
| Junction Temperature Tj | −65 °C to +150 °C - enables operation in extended industrial ambient environments |
Pinout & Package
Package: SOD323 (SC-76), 2-terminal surface-mount plastic package with cathode marked by bar on top surface. Dimensions: 1.8 mm × 1.35 mm × 0.95 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive for correct reverse-bias operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes conduction path during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % voltage tolerance | Enables cost-effective regulation where tight accuracy is not required, e.g., non-critical biasing |
| 300 mW power rating | Supports stable operation in low-current applications (<100 mA) without heatsinking |
| SOD323 footprint | Minimizes PCB area (1.8 × 1.35 mm) while maintaining hand-solderability and reflow compatibility |
| −3.5 mV/K tempco | Predictable negative drift allows compensation in multi-diode references or temperature-aware designs |
| 40 W surge capability | Clamps ESD transients (IEC 61000-4-2 Level 4) and line surges without degradation |
Applications
| USB Port Overvoltage Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamps 5 V USB VBUS line to prevent >4.1 V from reaching downstream 3.3 V logic. IC Role / Device Role / Timing Role: Zener acts as shunt regulator, diverting excess current when VBUS exceeds 3.9 V nominal. Use Value: Limits input voltage to reset supervisor IC (e.g., MAX809) without external series resistor, reducing BOM count. |
Use Scenario: Provides clean 3.3 V reset threshold for ARM Cortex-M0+ MCU during power-up sequencing. IC Role / Device Role / Timing Role: Functions as precision voltage reference for internal reset comparator. Use Value: Delivers stable trip point within ±5 % across −40 °C to +85 °C, meeting JEDEC JESD78 latch-up immunity requirements. |
| Industrial Sensor Signal Conditioning | Low-Power IoT Node Voltage Reference |
Use Scenario: Biases analog front-end of 4–20 mA current loop transmitter using 3.3 V rail derived from LDO. IC Role / Device Role / Timing Role: Supplies stable bias voltage to op-amp input stage and ADC reference divider. Use Value: Maintains <1 % gain error over temperature due to matched −3.5 mV/K tempco with silicon sensors. |
Use Scenario: Generates local 3.9 V reference for battery-monitoring ADC in BLE-enabled environmental sensor. IC Role / Device Role / Timing Role: Operates in low-quiescent mode (IZ = 10 μA) to minimize standby current. Use Value: Draws only 0.3 μA leakage at 1 V reverse bias, extending coin-cell life beyond 5 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | ±5 % tolerance, 3.3 V nominal, 200 mW rating, SOT-23 package | Lower VZ and power rating; requires larger board area than SOD323 | Select when legacy SOT-23 footprint is mandated and 3.3 V regulation suffices |
| BZX384-B3V9,115 | ±2 % tolerance, identical 3.9 V nominal, same SOD323 package and thermal specs | Tighter regulation improves accuracy in feedback loops but increases cost | Choose for closed-loop SMPS feedback where ±2 % VZ reduces output ripple by 1.2 mV |
Compared with BZX384-C3V9,115, MMBZ5226BS-7-F trades voltage level and package size for broader distributor availability, while BZX384-B3V9,115 offers measurable improvement in regulation stability at the expense of tighter process control and higher unit cost.
Availability
BZX384-C3V9,115 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset supervision, industrial sensor biasing, and low-power IoT voltage referencing requiring stable component supply and full traceability.
Supply support for BZX384-C3V9,115 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 leading semiconductor manufacturer specializing in high-performance, energy-efficient logic, discrete, and MOSFET devices, headquartered in Nijmegen, Netherlands.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for compact, reliable voltage regulation in consumer, computing, and industrial applications where SMD scalability and thermal robustness are essential.
FAQ
What is the maximum continuous forward current for BZX384-C3V9,115?
The device is not intended for forward conduction; its absolute maximum forward current is 250 mA per limiting values table, but sustained forward bias degrades Zener characteristics. In practice, forward voltage remains ≤0.9 V at 10 mA, confirming it is optimized for reverse-biased regulation, not rectification.
Can BZX384-C3V9,115 be used in automotive applications?
No - this part is explicitly non-automotive qualified per Nexperia's revision history (Rev. 4, Jan 2023). Automotive-grade alternatives (e.g., BZX384-Q series) undergo AEC-Q101 stress testing and have different qualification documentation; BZX384-C3V9,115 lacks those certifications and thermal derating profiles for under-hood environments.
How does the −3.5 mV/K temperature coefficient affect circuit performance?
At 85 °C ambient (ΔT ≈ 60 K above 25 °C), VZ shifts by −210 mV - resulting in ~3.69 V output. This predictable negative drift can be compensated in multi-stage references or accepted in applications where ±5 % tolerance already accommodates such variation, such as non-critical power-good signaling.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia provides validated reflow footprints (Fig. 12) for SOD323, specifying 0.5 mm pad width, 1.15 mm pad length, and 0.6 mm solder mask opening. Peak temperature must not exceed 260 °C for ≤10 seconds, consistent with IPC-J-STD-020 moisture sensitivity level 1 handling.
BZX384-C3V9,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C3V9,115 FAQ
1.How can I place an order for BZX384-C3V9,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C3V9,115 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-C3V9,115 reliable?
The price and inventory of BZX384-C3V9,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C3V9,115 is usually 5 days.
3.What payment methods are accepted for BZX384-C3V9,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C3V9,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C3V9,115?
BZX384-C3V9,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C3V9,115 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-C3V9,115?
For technical support, including BZX384-C3V9,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C3V9,115 requirements.
6.How does Aetrix verify that BZX384-C3V9,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-C3V9,115 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-C3V9,115 meets industry standards.
7.What is the process for return or replacement of BZX384-C3V9,115?
All BZX384-C3V9,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C3V9,115, 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-C3V9,115 part is unused and in its original packaging.
Return procedure for BZX384-C3V9,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C3V9,115 Tags
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