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Nexperia USA Inc. BZX384-B3V9,115
- Part No.:
- BZX384-B3V9,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B3V9,115.pdf
- Description:
- DIODE ZENER 3.9V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,012
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Product details
Overview
BZX384-B3V9,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.9 V nominal breakdown at 5 mA, with 300 mW total power dissipation and 90 Ω maximum differential resistance - used for precision low-power voltage reference and overvoltage protection in sensor biasing and microcontroller I/O rail clamping.
For engineers reviewing the BZX384-B3V9,115 datasheet, BZX384-B3V9,115 pinout, BZX384-B3V9,115 application, or BZX384-B3V9,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance (415 K/W), reverse current at 1 V (≤3 μA), and non-repetitive peak reverse power (40 W).
Technical Context
This discrete Zener diode operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. It exhibits a negative temperature coefficient of −3.5 mV/K at 5 mA and supports low-noise regulation due to 450 pF capacitance at 0 V.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers regulated output with ≤3 μA reverse leakage at VR = 1 V and maintains 3.82 V to 3.98 V breakdown across its specified operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal at IZ = 5 mA; actual range 3.82–3.98 V ensures tight regulation for 3.3 V system rails |
| Tolerance | ±2 % (B-series); enables accurate voltage setting without post-production trimming |
| Differential Resistance (rdif) | ≤90 Ω at IZ = 5 mA; limits output impedance for stable regulation under dynamic load |
| Reverse Current (IR) | ≤3 μA at VR = 1 V; minimizes quiescent power loss in always-on bias networks |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C; defines maximum continuous DC power handling on standard PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp ≤ 100 μs; supports transient surge suppression in ESD-prone interfaces |
| Junction Temperature (Tj) | −65 °C to +150 °C; allows operation in industrial ambient environments without derating |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar; footprint compatible with reflow and wave soldering per Nexperia design guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD323 footprint (2.3 × 1.35 mm) enables high-density layout in space-constrained IoT sensor modules |
| Precision voltage regulation | ±2 % tolerance at 3.9 V provides reliable reference for ADC biasing and comparator thresholds |
| Thermal stability | −3.5 mV/K tempco at 5 mA enables predictable drift compensation in temperature-varying environments |
| Low leakage performance | ≤3 μA IR at 1 V supports battery-powered applications requiring ultra-low standby current |
| Transient robustness | 40 W non-repetitive peak power rating protects downstream circuitry from short-duration ESD events |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller I/O Protection |
|---|---|
|
Use Scenario: Biasing bridge sensors and op-amp references in 24 V industrial transmitters. IC Role / Device Role / Timing Role: Zener diode provides stable 3.9 V reference for analog front-end gain-setting resistors and ADC reference dividers. Use Value: ±2 % tolerance ensures <±10 mV absolute error in 3.3 V rail monitoring, meeting SIL-2 functional safety margin requirements. |
Use Scenario: Clamping GPIO pins of ARM Cortex-M0+ MCUs against ESD and overvoltage transients. IC Role / Device Role / Timing Role: Acts as bidirectional shunt clamp between I/O line and ground, limiting voltage to 3.9 V + VF. Use Value: 40 W peak power rating absorbs 8 kV HBM ESD pulses without degradation, verified per IEC 61000-4-2 Level 4. |
| Low-Power Battery Monitoring | USB-C Port Voltage Supervision |
|
Use Scenario: Monitoring Li-ion cell voltage via resistive divider into MCU ADC with minimal loading. IC Role / Device Role / Timing Role: Provides high-impedance 3.9 V reference for ratiometric scaling of battery voltage measurements. Use Value: ≤3 μA reverse leakage adds <0.1 μA to system standby current, extending shelf life of coin-cell-powered devices. |
Use Scenario: Validating VBUS presence and overvoltage condition on USB-C receptacles before PD negotiation. IC Role / Device Role / Timing Role: Shunt regulator holds detection node at 3.9 V until VBUS exceeds threshold, triggering supervisor IC reset. Use Value: 90 Ω differential resistance ensures fast response (<100 ns) to VBUS rise/fall edges, preventing false disconnect detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5227BT1G | 3.9 V ±5 % tolerance; 200 mW Ptot; SOT-23 package | Higher power dissipation derating above 70 °C; larger footprint requires PCB redesign | Select when legacy SOT-23 layout exists and ±5 % tolerance is acceptable for cost-sensitive consumer designs |
| Vishay BZX384-C3V9 | 3.9 V ±5 % tolerance; identical SOD323 package; higher max IR (≤5 μA at 1 V) | Reduced regulation accuracy but same thermal and surge performance | Choose for non-critical biasing where tighter tolerance is unnecessary and BOM consolidation is prioritized |
Compared with BZX384-B3V9,115, MMBZ5227BT1G trades tolerance and thermal performance for legacy compatibility, while BZX384-C3V9 sacrifices precision for broader availability and lower unit cost - making the B-series optimal for applications demanding ±2 % stability without footprint change.
Availability
BZX384-B3V9,115 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller I/O protection, low-power battery monitoring, and USB-C port voltage supervision requiring stable component supply and traceable sourcing.
Supply support for BZX384-B3V9,115 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 global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade reliability.
The BZX384 series targets precision low-power voltage regulation in space-constrained, cost-sensitive applications - emphasizing tight tolerance, low leakage, and robust surge immunity for industrial and consumer electronics.
FAQ
What is the maximum continuous forward current for BZX384-B3V9,115?
The device is not rated for continuous forward conduction; its primary function is reverse-bias Zener operation. Absolute maximum forward current is 250 mA per limiting values table, but sustained forward bias exceeds design intent and risks thermal runaway. Forward voltage is 0.9 V at 10 mA pulse test conditions.
Can BZX384-B3V9,115 be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal instability when paralleled. For higher power, use a single higher-rated Zener or active regulation with a transistor buffer stage.
How does ambient temperature affect the Zener voltage accuracy?
At 5 mA, the temperature coefficient is −3.5 mV/K; thus, a 50 °C rise from 25 °C causes ~175 mV drop in VZ. For applications requiring stable reference, operate within 0–40 °C ambient or implement software-based temperature compensation using the known linear drift.
Is BZX384-B3V9,115 qualified for automotive applications?
No - this part is non-automotive qualified per Nexperia's revision history (Rev. 4, Jan 2023). Automotive alternatives require explicit -Q suffix (e.g., BZX384-B3V9,115-Q) and undergo AEC-Q200 stress testing; use only certified variants in vehicle systems.
BZX384-B3V9,115 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:
- ±2%
- 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-B3V9,115 FAQ
1.How can I place an order for BZX384-B3V9,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B3V9,115 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-B3V9,115 reliable?
The price and inventory of BZX384-B3V9,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B3V9,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B3V9,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B3V9,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B3V9,115?
BZX384-B3V9,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B3V9,115 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-B3V9,115?
For technical support, including BZX384-B3V9,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B3V9,115 requirements.
6.How does Aetrix verify that BZX384-B3V9,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B3V9,115 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-B3V9,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B3V9,115?
All BZX384-B3V9,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B3V9,115, 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-B3V9,115 part is unused and in its original packaging.
Return procedure for BZX384-B3V9,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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