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Nexperia USA Inc. BZX384-B30,115
- Part No.:
- BZX384-B30,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B30,115.pdf
- Description:
- DIODE ZENER 30V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:15,510
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Product details
Overview
BZX384-B30,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 30 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 reference or overvoltage clamp in low-power analog supply rails, sensor biasing circuits, and microcontroller reset supervision.
For engineers reviewing the BZX384-B30,115 datasheet, BZX384-B30,115 pinout, BZX384-B30,115 application, or BZX384-B30,115 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world regulation use cases, and validated alternative parts with documented tolerance and temperature coefficient differences.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a specified 30 V working voltage at IZ = 5 mA, exhibiting a typical differential resistance of 300 Ω and temperature coefficient of +21 mV/K. Its junction-to-ambient thermal resistance is 415 K/W on FR4 PCB, limiting continuous dissipation to 300 mW at Tamb ≤ 25 °C.
The device supports transient suppression via 40 W non-repetitive peak reverse power handling (tp = 100 μs), while maintaining reverse leakage < 0.1 μA at VR = 22 V and forward voltage ≤ 0.9 V at IF = 10 mA - enabling reliable operation in space-constrained, low-current regulation nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 30 V nominal at IZ = 5 mA; ±2 % tolerance ensures stable reference within ±0.6 V across production lots. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C; defines maximum continuous DC or average pulsed power before thermal derating applies. |
| Differential Resistance (rdif) | 300 Ω max at IZ = 5 mA; determines output impedance and load regulation error under varying current draw. |
| Reverse Leakage (IR) | < 0.1 μA at VR = 22 V; guarantees minimal quiescent current in high-impedance bias networks. |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA; enables predictable conduction during forward-biased fault conditions or dual-role clamping. |
| Non-repetitive Peak Power (PZSM) | 40 W for tp ≤ 100 μs; allows transient overvoltage absorption without permanent damage in surge-prone interfaces. |
| Junction Temperature (Tj) | 150 °C absolute maximum; sets upper thermal limit for reliability in sealed enclosures or high ambient environments. |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic case with 2 leads, 1.35 mm × 0.85 mm footprint, 0.45 mm height, and cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode connection point for Zener operation; marking bar identifies this terminal. |
| 2 | Anode (A) | Typically grounded or connected to lower-potential rail; completes reverse-bias path enabling controlled breakdown at VZ. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % voltage tolerance | Enables tighter regulation than ±5 % variants (BZX384-C30), reducing calibration overhead in precision feedback loops. |
| 300 mW power rating | Supports stable DC regulation in 3.3 V/5 V logic supply monitoring without external heat sinking on standard FR4 PCB. |
| 40 W surge capability | Withstands ESD transients per IEC 61000-4-2 Level 4 (8 kV contact) when used with series current-limiting resistor. |
| SOD323 package | 0.85 mm width enables placement in dense layouts near IC power pins, minimizing trace inductance in noise-sensitive analog sections. |
| 150 °C max junction temperature | Permits operation in industrial control modules with ambient temperatures up to +85 °C while maintaining 10-year lifetime under derated power. |
Applications
| Power Supply Monitoring | Sensor Bias Reference |
|---|---|
Use Scenario: Detecting undervoltage condition on a 3.3 V microcontroller supply rail using a resistive divider into an ADC input. IC Role / Device Role / Timing Role: Zener diode provides stable 30 V reference to scale divider ratio, ensuring accurate threshold detection independent of input rail drift. Use Value: Enables reliable brown-out detection with ±0.6 V reference stability, eliminating need for dedicated supervisor IC in cost-sensitive designs. | Use Scenario: Providing fixed bias voltage to a photodiode amplifier stage operating from a single 5 V rail. IC Role / Device Role / Timing Role: Functions as low-noise, low-drift voltage reference for op-amp bias network, replacing higher-cost shunt references. Use Value: Delivers 30 V reference with < 0.1 μA leakage, minimizing input offset error and preserving signal-to-noise ratio in µV-level sensing. |
| Overvoltage Clamp | Reset Circuit Protection |
Use Scenario: Protecting RS-485 transceiver inputs against induced surges in factory automation cabling. IC Role / Device Role / Timing Role: Placed between data line and ground to clamp transients above 30 V, diverting energy away from sensitive receiver circuitry. Use Value: Absorbs 40 W peak pulses without degradation, extending transceiver lifetime in electrically noisy industrial environments. | Use Scenario: Stabilizing reset line voltage during power-up sequencing in an FPGA-based embedded system. IC Role / Device Role / Timing Role: Regulates reset rail to precise 30 V level, ensuring clean release of POR (power-on reset) signal after supply stabilization. Use Value: Prevents metastability in configuration logic by guaranteeing monotonic reset deassertion with < 100 ns jitter due to tight VZ tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-A30,115 | ±1 % tolerance (vs. ±2 %); 250 Ω max rdif; identical VZ, Ptot, and package. | Higher accuracy required in metrology-grade references or closed-loop DAC feedback paths. | Select when reference stability > ±0.3 V is mandatory and cost premium is acceptable. |
| BZX384-C30,115 | ±5 % tolerance (vs. ±2 %); 500 Ω max rdif; same VZ range but wider distribution. | Cost-driven consumer electronics where coarse regulation suffices (e.g., LED current setting). | Choose for non-critical biasing where ±1.5 V variation is tolerable and BOM cost is primary constraint. |
Compared with BZX384-A30,115, the BZX384-B30,115 trades 0.5 % tolerance and 50 Ω lower rdif for lower unit cost; versus BZX384-C30,115, it improves regulation accuracy by 3× and reduces dynamic impedance by 40 %, justifying its use in mid-tier industrial sensors and communication interfaces.
Availability
BZX384-B30,115 is available at Aetrix Electronics and suitable for power supply monitoring, sensor bias reference, overvoltage clamp, and reset circuit protection requiring stable component supply and consistent ±2 % voltage regulation performance.
Supply support for BZX384-B30,115 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 manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume logic, discrete, and MOSFET solutions with emphasis on reliability and energy efficiency.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, designed specifically for space-constrained, low-power analog and mixed-signal applications demanding stable voltage references in consumer, industrial, and computing systems.
FAQ
What is the maximum continuous reverse current for BZX384-B30,115 at 25 °C ambient?
The device has no specified maximum continuous reverse current; instead, it is limited by power dissipation. At 30 V breakdown and 300 mW Ptot, the maximum steady-state Zener current is 10 mA. Exceeding this causes junction temperature rise beyond safe limits unless heatsinking is applied.
Can BZX384-B30,115 be used in place of a 3.3 V Zener diode?
No - BZX384-B30,115 is a 30 V Zener diode, not 3.3 V. Substituting it for a 3.3 V part would result in catastrophic failure or no regulation. For 3.3 V regulation, use BZX384-B3V3,115 (3.3 V, ±2 %) which shares identical package, power rating, and thermal characteristics.
Does the SOD323 package support reflow soldering per JEDEC J-STD-020?
Yes - Nexperia qualifies the SOD323 package for lead-free reflow per JEDEC J-STD-020D. The recommended profile uses peak temperature of 260 °C for ≤ 30 seconds, with ramp rates ≤ 3 °C/s, matching standard Class 3 assembly requirements for industrial-grade PCBs.
How does temperature affect the 30 V regulation voltage in practical operation?
The temperature coefficient is +21 mV/K at IZ = 2 mA. Over a –40 °C to +85 °C ambient range, VZ shifts by approximately +2.6 V - from 29.4 V to 32.0 V. This must be accounted for in precision references; adding a thermistor-compensated resistor network can reduce drift to < ±0.1 V.
BZX384-B30,115 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):
- 30 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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-B30,115 FAQ
1.How can I place an order for BZX384-B30,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B30,115 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-B30,115 reliable?
The price and inventory of BZX384-B30,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B30,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B30,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B30,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B30,115?
BZX384-B30,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B30,115 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-B30,115?
For technical support, including BZX384-B30,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B30,115 requirements.
6.How does Aetrix verify that BZX384-B30,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B30,115 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-B30,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B30,115?
All BZX384-B30,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B30,115, 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-B30,115 part is unused and in its original packaging.
Return procedure for BZX384-B30,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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