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Nexperia USA Inc. BZX384-B4V3,115
- Part No.:
- BZX384-B4V3,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B4V3,115.pdf
- Description:
- DIODE ZENER 4.3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:10,085
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Product details
Overview
BZX384-B4V3,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 4.3 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, sensor bias networks, and overvoltage protection circuits.
For engineers reviewing the BZX384-B4V3,115 datasheet, BZX384-B4V3,115 pinout, BZX384-B4V3,115 application, or BZX384-B4V3,115 equivalent, key selection criteria include its 4.3 V ±2 % regulation accuracy, 90 Ω max differential resistance at 5 mA, 3 μA max reverse current at 1 V, thermal resistance of 415 K/W (junction-to-ambient), and cathode-anode polarity marking on the SOD323 body.
Technical Context
This device operates in reverse-bias Zener breakdown mode with a specified working voltage of 4.21 V to 4.39 V at IZ = 5 mA. Its temperature coefficient is −3.5 mV/K to 0.0 mV/K across the operating range, enabling stable regulation in ambient temperatures from −65 °C to +150 °C.
The diode exhibits 90 Ω maximum differential resistance at 5 mA, 3 μA maximum reverse current at 1 V, and forward voltage of ≤0.9 V at 10 mA. Its non-repetitive peak reverse current capability is 6.0 A for 100 μs pulses, supporting transient suppression in low-energy surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 4.21 V to 4.39 V at IZ = 5 mA - defines precise regulation point for feedback or clamping |
| Tolerance | ±2 % - ensures tight voltage matching across production lots for consistent circuit behavior |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets continuous DC power limit on standard FR4 PCB |
| Differential Resistance (rdif) | ≤90 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤3 μA at VR = 1 V - defines leakage level below breakdown, critical for low-power standby circuits |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports short-duration transient suppression without failure |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in extended industrial and automotive-adjacent environments |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm footprint, 0.45 mm height, and cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; connected to regulated output node or voltage reference point in shunt configuration |
| 2 | Anode (A) | Positive terminal; tied to ground or lower-potential rail to enable reverse-bias Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD packaging | SOD323 footprint (1.35 × 0.85 mm) enables high-density PCB layouts in space-constrained consumer and portable electronics |
| Stable ±2 % voltage tolerance | Guarantees 4.21–4.39 V regulation window at 5 mA, reducing need for post-production trimming in precision references |
| Controlled thermal resistance | Rth(j-a) = 415 K/W allows predictable junction temperature rise under 300 mW load on standard FR4 board |
| Low leakage performance | IR ≤ 3 μA at 1 V reverse bias minimizes quiescent current draw in battery-powered sensor nodes |
| Pulse survivability | Withstands 6.0 A non-repetitive reverse current (100 μs) - suitable for ESD and line-transient clamping in I/O protection |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Provides stable 4.3 V reference for optocoupler-based feedback in isolated DC-DC converters. IC Role / Device Role / Timing Role: Shunt voltage reference regulating error amplifier input in secondary-side control loop. Use Value: ±2 % tolerance ensures <±1% output voltage variation across line/load/temperature, meeting Class II adapter specifications. |
Use Scenario: Supplies precise bias voltage to analog output sensors (e.g., pressure transducers) in industrial monitoring systems. IC Role / Device Role / Timing Role: Low-leakage Zener source establishing fixed excitation potential for ratiometric signal conditioning. Use Value: 3 μA max reverse current at 1 V prevents loading of high-impedance sensor bridges, preserving measurement accuracy. |
| Overvoltage Clamp for MCU I/O | Low-Power Voltage Monitor |
Use Scenario: Protects 3.3 V GPIO pins against 5 V bus faults or ESD events in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting excess energy before internal protection diodes activate. Use Value: 40 W pulse rating (100 μs) absorbs IEC 61000-4-2 Level 4 contact discharge energy without degradation. |
Use Scenario: Enables brown-out detection in battery-powered IoT nodes using comparator input threshold set by Zener voltage. IC Role / Device Role / Timing Role: Stable 4.3 V reference defining reset threshold for microcontroller supervisory circuit. Use Value: −3.5 to 0.0 mV/K tempco ensures <±20 mV drift over −40 to +85 °C, maintaining reliable reset margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ4685T1G | 4.3 V ±5 %, SOT-23 package, 225 mW Ptot, 100 Ω rdif | Higher tolerance and lower power rating reduce regulation precision and continuous dissipation headroom | Select when cost sensitivity outweighs voltage stability requirements and board space permits larger SOT-23 footprint |
| BZX384-C4V3,115 | 4.0–4.6 V (±5 %), same SOD323 package, identical Ptot and thermal specs | Wider voltage spread increases risk of out-of-spec operation in tight-tolerance feedback loops | Choose only for non-critical clamping where ±5 % variation is acceptable and legacy BOM reuse is prioritized |
Compared with MMBZ4685T1G and BZX384-C4V3,115, the BZX384-B4V3,115 delivers superior voltage accuracy (±2 % vs. ±5 %) and lower dynamic impedance (90 Ω vs. 100 Ω), making it preferred for precision regulation-while retaining identical SOD323 mounting and thermal behavior for drop-in layout compatibility.
Availability
BZX384-B4V3,115 is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing networks, overvoltage clamps, and low-power voltage monitors requiring stable component supply and traceable sourcing.
Supply support for BZX384-B4V3,115 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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, computing, and consumer markets.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered for low-power voltage reference and clamping in space-constrained, thermally demanding applications where ±1–2 % accuracy and SOD323 scalability are essential.
FAQ
What is the maximum continuous reverse current this diode can handle at 4.3 V?
The BZX384-B4V3,115 is not rated for continuous reverse conduction at its Zener voltage. Its absolute maximum continuous reverse current is derived from Ptot = 300 mW: IZ(max) ≈ 300 mW / 4.3 V ≈ 70 mA at 25 °C ambient on FR4 PCB. Derating applies above 25 °C per Rth(j-a) = 415 K/W.
Does this part have automotive qualification?
No. The BZX384-B4V3,115 is a standard industrial-grade device. Nexperia explicitly states in Revision 4 (Jan 2023) that BZX384_SER products are non-automotive qualified and recommends consulting nexperia.com for dedicated −Q automotive alternatives if required for AEC-Q101 compliance.
How is polarity identified on the SOD323 package?
Polarity is marked by a single bar printed on the top surface of the SOD323 case, aligned with Pin 1 (cathode). This matches the simplified outline in Table 2 of the datasheet and is visible under 10× magnification during visual inspection or automated optical recognition.
Can this Zener be used in series for higher voltage references?
Yes-multiple BZX384-B4V3,115 diodes may be stacked anode-to-cathode to achieve higher reference voltages (e.g., two in series yield ~8.6 V). However, tolerance compounds (±2 % each → ±2.8 % total), and thermal coupling must be managed to avoid mismatched temperature coefficients affecting stability.
BZX384-B4V3,115 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):
- 4.3 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-B4V3,115 FAQ
1.How can I place an order for BZX384-B4V3,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B4V3,115 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-B4V3,115 reliable?
The price and inventory of BZX384-B4V3,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B4V3,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B4V3,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B4V3,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B4V3,115?
BZX384-B4V3,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B4V3,115 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-B4V3,115?
For technical support, including BZX384-B4V3,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B4V3,115 requirements.
6.How does Aetrix verify that BZX384-B4V3,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B4V3,115 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-B4V3,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B4V3,115?
All BZX384-B4V3,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B4V3,115, 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-B4V3,115 part is unused and in its original packaging.
Return procedure for BZX384-B4V3,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B4V3,115 Tags
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