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Nexperia USA Inc. BZX384-B15F
- Part No.:
- BZX384-B15F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B15F.pdf
- Description:
- DIODE ZENER 15V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,435
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Product details
Overview
BZX384-B15F from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 15 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 75 Ω maximum differential resistance. It serves as a precision reference or low-power voltage clamp in power supply feedback paths, sensor biasing, and overvoltage protection circuits.
For engineers reviewing the BZX384-B15F datasheet, BZX384-B15F pinout, BZX384-B15F application, or BZX384-B15F equivalent, key selection criteria include its 15 V ±2 % tolerance, 75 Ω dynamic impedance at 5 mA, 2 μA reverse current at 12 V, -0.05 mV/K temperature coefficient, and SOD323 thermal resistance of 415 K/W in free air.
Technical Context
This Zener diode operates in reverse-biased avalanche mode to maintain stable voltage regulation across load and line variations. Its 15 V nominal Zener voltage is specified at IZ = 5 mA with 75 Ω typical differential resistance, ensuring predictable clamping behavior under small-signal conditions.
Designed for low-power SMD applications, it features non-repetitive peak reverse power dissipation up to 40 W (100 μs pulse), junction temperature limit of 150 °C, and thermal resistance from junction-to-ambient of 415 K/W on FR4 PCB - enabling reliable operation in space-constrained consumer and industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.7 V to 15.3 V at IZ = 5 mA - ensures ±2 % regulation accuracy for reference and clamp functions |
| Differential Resistance (rdif) | ≤75 Ω at IZ = 5 mA - limits output voltage variation under changing load current |
| Reverse Current (IR) | ≤2 μA at VR = 12 V - guarantees low leakage in standby or high-impedance bias networks |
| Temperature Coefficient (SZ) | -0.05 mV/K at IZ = 5 mA - provides near-zero drift over temperature for stable references |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - defines continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports transient overvoltage suppression without failure |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - enables use as low-drop rectifier or polarity indicator in dual-role designs |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm body size, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode-to-cathode voltage establishes Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation than ±5 % variants (BZX384-C) without premium ±1 % cost (BZX384-A) |
| Low 75 Ω dynamic impedance | Minimizes output voltage shift under ±1 mA load current change in feedback loops |
| SOD323 footprint compatibility | Matches industry-standard 0805-equivalent land pattern for automated assembly and reflow |
| 150 °C maximum junction temperature | Supports operation in thermally dense environments such as enclosed power modules or LED drivers |
| 40 W surge rating (100 μs) | Clamps ESD transients and switching spikes without degradation in I/O protection circuits |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Stabilizing output voltage in adjustable buck converter feedback divider. IC Role / Device Role / Timing Role: Provides precise 15 V reference point for error amplifier input. Use Value: Enables ±1.5 % output regulation accuracy over line/load/temperature with minimal external components. |
Use Scenario: Supplying stable bias voltage to analog temperature sensor ICs. IC Role / Device Role / Timing Role: Acts as shunt regulator to maintain constant 15 V across sensor supply pin. Use Value: Reduces sensor output drift by limiting supply variation to <±30 mV across -40 °C to +85 °C. |
| Overvoltage Clamp Protection | Microcontroller I/O Pin Protection |
Use Scenario: Protecting 12 V automotive accessory circuitry from load-dump transients. IC Role / Device Role / Timing Role: Clamps induced surges above 15.3 V to prevent downstream component damage. Use Value: Absorbs 40 W pulses without failure, limiting peak voltage to ≤16.2 V for 100 μs duration. |
Use Scenario: Safeguarding 3.3 V MCU GPIO pins against accidental 12 V miswiring. IC Role / Device Role / Timing Role: Shunts excess voltage to ground before internal ESD structures activate. Use Value: Limits pin voltage to ≤15.3 V while maintaining <2 μA leakage at normal operating voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-A15 | ±1 % tolerance (14.85–15.15 V), 50 Ω rdif, higher cost | Better stability in precision references; tighter thermal drift control | Select when regulation accuracy <±0.15 V is required and budget allows premium tolerance |
| BZX384-C15 | ±5 % tolerance (13.8–15.6 V), 200 Ω rdif, lower cost | Higher voltage variation under load; suitable only for non-critical clamping | Select for cost-sensitive overvoltage suppression where 15 V is nominal, not functional |
Compared with BZX384-B15F, the A15 offers superior accuracy and lower impedance for metrology-grade references, while the C15 trades performance for cost in non-critical protection roles - making the B15F the balanced choice for general-purpose 15 V regulation requiring verified ±2 % consistency and robust surge handling.
Availability
BZX384-B15F is available at Aetrix Electronics and suitable for power supply feedback, sensor biasing, overvoltage clamp protection, and microcontroller I/O protection requiring stable component supply and consistent ±2 % Zener tolerance.
Supply support for BZX384-B15F 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 robustness for mass-market electronics.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered for low-power voltage reference and clamping in space-constrained consumer, industrial, and computing applications - emphasizing tight tolerance, low dynamic impedance, and SOD323 manufacturability.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX384-B15F has no specified maximum continuous reverse current; instead, its safe operating area is defined by power dissipation. At 25 °C ambient, it supports up to 20 mA continuous reverse current (15 V × 20 mA = 300 mW). Derating is required above 25 °C per the 415 K/W thermal resistance.
Can this Zener be used in series to achieve higher regulation voltage?
Yes - two BZX384-B15F diodes in series yield ~30 V regulation, but tolerance compounds to ±4 % (14.7+14.7=29.4 V to 15.3+15.3=30.6 V), and dynamic impedance sums to ≤150 Ω. Thermal coupling must be ensured to avoid mismatched temperature coefficients.
Is the SOD323 package compatible with standard reflow profiles?
Yes - the SOD323 package is qualified for lead-free reflow per JEDEC J-STD-020. Recommended peak temperature is 260 °C for ≤10 seconds; solder land pattern matches Figure 12 in the datasheet (0.6 mm pad width, 1.5 mm length, 0.5 mm spacing).
How does the temperature coefficient affect regulation at 85 °C ambient?
With SZ = -0.05 mV/K, a 60 K rise from 25 °C to 85 °C shifts VZ by -3 mV - resulting in 14.997 V instead of 15.000 V at 5 mA. This 0.02 % drift is negligible for most non-precision applications and remains within the ±2 % initial tolerance band.
BZX384-B15F 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):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 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-B15F FAQ
1.How can I place an order for BZX384-B15F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B15F 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-B15F reliable?
The price and inventory of BZX384-B15F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B15F is usually 5 days.
3.What payment methods are accepted for BZX384-B15F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B15F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B15F?
BZX384-B15F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B15F 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-B15F?
For technical support, including BZX384-B15F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B15F requirements.
6.How does Aetrix verify that BZX384-B15F is sourced from the original manufacturer or authorized distributors?
All BZX384-B15F 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-B15F meets industry standards.
7.What is the process for return or replacement of BZX384-B15F?
All BZX384-B15F units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B15F, 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-B15F part is unused and in its original packaging.
Return procedure for BZX384-B15F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B15F Tags
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