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Nexperia USA Inc. BZX384-B47,115
- Part No.:
- BZX384-B47,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B47,115.pdf
- Description:
- DIODE ZENER 47V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:30,420
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Product details
Overview
BZX384-B47,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 47 V nominal breakdown voltage at 2 mA test current, 300 mW total power dissipation, and 150 °C maximum junction temperature - used for precision low-power voltage reference and overvoltage protection in power supply feedback loops and sensor biasing circuits.
For engineers reviewing the BZX384-B47,115 datasheet, BZX384-B47,115 pinout, BZX384-B47,115 application, or BZX384-B47,115 equivalent, key selection criteria include its 47 V Zener voltage tolerance (±2 %), differential resistance of 375 Ω at 2 mA, reverse current ≤0.1 μA at 37.6 V, and thermal resistance of 110 K/W from junction to solder point - all critical for stable regulation under varying load and ambient conditions.
Technical Context
This Zener diode operates in reverse-biased avalanche mode with a specified 47 V nominal working voltage at IZ = 2 mA, exhibiting a temperature coefficient of +0.05 mV/K and typical diode capacitance of 40 pF at 1 MHz and 0 V reverse bias. Its non-repetitive peak reverse power dissipation is rated at 40 W for 100 μs pulses.
The device uses planar epitaxial technology in a surface-mount SOD323 package with cathode-marked anode-cathode polarity, optimized for low thermal resistance (Rth(j-sp) = 110 K/W) and compatibility with standard reflow and wave soldering profiles per JEDEC J-STD-020/002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V nominal at IZ = 2 mA; ±2 % tolerance ensures stable reference within ±0.94 V across production lot. |
| Differential Resistance (rdif) | 375 Ω max at IZ = 2 mA; defines regulation slope and output impedance in shunt regulator configurations. |
| Reverse Current (IR) | ≤0.1 μA at VR = 37.6 V; guarantees minimal leakage below knee voltage, critical for low-power standby circuits. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB; sets maximum continuous DC power handling before thermal derating applies. |
| Junction-to-Solder-Point Rth | 110 K/W; enables accurate thermal modeling when mounted on standard copper footprint, supporting reliability prediction. |
| Non-repetitive Peak Power | 40 W for tp = 100 μs; supports transient surge suppression in input protection stages without permanent damage. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; defines conduction loss during forward-bias fault conditions or polarity-check circuits. |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2-terminal, lead-free, RoHS-compliant, dimensions 1.8 mm × 1.35 mm × 0.95 mm (L × W × H), cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node in shunt configuration; marking bar identifies this terminal for correct PCB orientation. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path enabling Zener breakdown at 47 V. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation accuracy than ±5 % variants, reducing need for post-regulation trimming in mid-precision analog supplies. |
| 300 mW power rating | Supports continuous operation in space-constrained consumer and industrial PCBs without heatsinking at ambient ≤25 °C. |
| 110 K/W junction-to-solder-point Rth | Allows direct thermal coupling to PCB copper, improving long-term stability and enabling accurate junction temperature estimation. |
| 40 pF capacitance at 0 V | Minimizes high-frequency loading in signal-path references and RF detector bias networks without requiring external compensation. |
| 150 °C max junction temperature | Permits reliable operation in enclosed enclosures or near heat-generating components without derating below full power. |
Applications
| Power Supply Feedback Reference | Sensor Biasing Circuit |
|---|---|
Use Scenario: Provides stable 47 V reference in TL431-based adjustable flyback converter feedback divider. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise output voltage setpoint via resistor network scaling. Use Value: ±2 % tolerance maintains output regulation within ±0.5 % over line/load/temperature, eliminating need for manual calibration. |
Use Scenario: Biases a high-voltage photodiode in smoke detector front-end amplifier. IC Role / Device Role / Timing Role: Reverse-biased Zener supplying constant 47 V bias to photodiode cathode for optimal depletion region control. Use Value: Low 0.1 μA leakage at 37.6 V prevents signal corruption in picoamp-level photocurrent measurement paths. |
| Overvoltage Clamp Protection | Microcontroller I/O Protection |
Use Scenario: Clamps 48 V CAN bus transceiver supply rail against load-dump transients. IC Role / Device Role / Timing Role: Fast-acting shunt clamp absorbing 40 W surges for 100 μs without failure. Use Value: 40 W non-repetitive rating handles ISO 7637-2 Pulse 5a without degradation, protecting downstream ICs. |
Use Scenario: Protects 3.3 V microcontroller ADC input from accidental 24 V field-wiring faults. IC Role / Device Role / Timing Role: Series-Zener limiter with current-limiting resistor, clamping fault voltage to safe level. Use Value: 47 V breakdown ensures robust margin above 24 V system rail while maintaining fast response to ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ47VCW | Same 47 V, ±5 % tolerance; higher 500 mW Ptot; SOT-323 package (larger footprint). | Higher power handling suits higher-current clamping but requires larger PCB area and different thermal layout. | Select when >300 mW continuous dissipation is required and board space allows SOT-323 mounting. |
| BZX384-C47 | Same 47 V, ±5 % tolerance; identical SOD323 package and 300 mW rating; higher max IR (0.5 μA at 37.6 V). | Looser tolerance acceptable in non-critical biasing; higher leakage may affect ultra-low-current sensor nodes. | Select for cost-sensitive designs where ±5 % regulation accuracy suffices and leakage sensitivity is low. |
Compared with BZX384-B47,115, MMBZ47VCW offers greater power headroom at the expense of footprint size, while BZX384-C47 reduces cost and maintains package compatibility but trades regulation accuracy and leakage performance for relaxed tolerance.
Availability
BZX384-B47,115 is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing circuits, overvoltage clamp protection, and microcontroller I/O protection requiring stable component supply and consistent ±2 % Zener voltage tolerance.
Supply support for BZX384-B47,115 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 focused on high-volume, high-reliability discrete and logic devices, with manufacturing rooted in process innovation and automotive-grade quality systems.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, designed specifically for low-power, space-constrained voltage reference and protection applications in consumer, industrial, and communication equipment.
FAQ
What is the maximum reverse voltage before breakdown for BZX384-B47,115?
The BZX384-B47,115 exhibits a nominal Zener voltage of 47 V at 2 mA test current, with guaranteed minimum and maximum values of 46.1 V and 47.9 V respectively due to its ±2 % tolerance. Breakdown begins gradually above ~44 V, but stable regulation occurs only within the specified 46.1–47.9 V band at rated current.
Can BZX384-B47,115 be used in series or parallel configurations?
Series connection is feasible for higher composite voltage references but requires matched units to avoid current imbalance; parallel use is not recommended due to negative temperature coefficient interaction and unequal current sharing that risks thermal runaway. Single-device operation is strongly advised per datasheet guidance.
How does ambient temperature affect the Zener voltage accuracy?
The BZX384-B47,115 has a temperature coefficient of +0.05 mV/K, meaning its Zener voltage increases by approximately 2.35 mV per 47 K rise in junction temperature. At 100 °C junction temperature (75 K above 25 °C), the shift is ~3.75 mV - well within ±2 % tolerance, preserving regulation integrity across industrial temperature ranges.
Is BZX384-B47,115 suitable for automotive applications?
No - BZX384-B47,115 is not automotive-qualified. The datasheet explicitly states it is "non-automotive qualification" and directs users to Nexperia's -Q qualified alternatives for automotive use. It lacks AEC-Q101 stress testing, extended temperature validation, and zero-defect manufacturing controls required for vehicle systems.
BZX384-B47,115 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):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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-B47,115 FAQ
1.How can I place an order for BZX384-B47,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B47,115 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-B47,115 reliable?
The price and inventory of BZX384-B47,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B47,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B47,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B47,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B47,115?
BZX384-B47,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B47,115 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-B47,115?
For technical support, including BZX384-B47,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B47,115 requirements.
6.How does Aetrix verify that BZX384-B47,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B47,115 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-B47,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B47,115?
All BZX384-B47,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B47,115, 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-B47,115 part is unused and in its original packaging.
Return procedure for BZX384-B47,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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