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Nexperia USA Inc. BZX384-A47X
- Part No.:
- BZX384-A47X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A47X.pdf
- Description:
- DIODE ZENER 47V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,142
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Product details
Overview
BZX384-A47X from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, providing precise 47 V nominal breakdown voltage at 2 mA, with 375 Ω maximum differential resistance and ≤170 μA reverse current at 37.6 V. It delivers stable reference voltage for low-power power supply regulation and overvoltage protection in compact consumer and industrial PCBs.
For engineers reviewing the BZX384-A47X datasheet, BZX384-A47X pinout, BZX384-A47X application, or BZX384-A47X equivalent, this page provides verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world use cases, and validated alternative parts for design-in and sourcing decisions.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining regulated output by conducting reverse current above its specified Zener voltage. Its 47 V nominal breakdown is characterized at IZ = 2 mA, with temperature coefficient of +0.05 mV/K and typical junction-to-ambient thermal resistance of 415 K/W on FR4 PCB.
The diode supports non-repetitive surge handling up to 40 W for 100 μs pulses and sustains continuous dissipation of 300 mW at Tamb ≤ 25 °C. Its 150 °C maximum junction temperature and −65 °C to +150 °C operating range support reliability in thermally constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 46.53 V to 47.47 V at IZ = 2 mA - ensures tight 47 V regulation for precision reference applications |
| Differential Resistance (rdif) | ≤375 Ω - limits output voltage variation under load current changes |
| Reverse Current (IR) | ≤170 μA at VR = 37.6 V - guarantees low leakage before conduction onset |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - defines maximum steady-state thermal load on PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - enables transient overvoltage clamping without failure |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - confirms low-loss forward conduction during polarity reversal events |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports operation across extended industrial ambient conditions |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 2.7 mm × 1.6 mm footprint, 0.45 mm nominal height, and cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; carries reverse current during Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % voltage tolerance | Enables high-accuracy voltage references without post-calibration in battery management or sensor signal conditioning |
| 300 mW total power rating | Supports continuous regulation in space-constrained designs where heatsinking is impractical |
| 40 W non-repetitive surge capability | Provides robust ESD and lightning-induced transient suppression in I/O protection circuits |
| SOD323 package compatibility | Ensures drop-in replacement in existing 0805-class layouts with standardized reflow profiles |
| 150 °C max junction temperature | Allows reliable operation near heat-generating components like DC-DC converters or microcontrollers |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in low-current linear regulators or switching converter error amplifiers. IC Role / Device Role / Timing Role: Shunt reference element setting precise output voltage threshold via resistor divider network. Use Value: 47 V nominal breakdown with ±1 % tolerance maintains ±0.47 V absolute accuracy in closed-loop regulation. |
Use Scenario: Protecting downstream analog inputs from accidental 48 V bus exposure in telecom interface cards. IC Role / Device Role / Timing Role: Passive clamping device limiting input voltage to safe levels during fault conditions. Use Value: 40 W surge rating absorbs 100 μs transients without degradation, preserving ADC integrity. |
| Signal Level Translation | Threshold Detection |
|
Use Scenario: Biasing op-amp inputs to fixed 47 V reference in high-side current sensing circuits. IC Role / Device Role / Timing Role: DC voltage source establishing common-mode level for differential measurement front-ends. Use Value: Low 375 Ω dynamic impedance minimizes loading error when driving high-impedance amplifier inputs. |
Use Scenario: Triggering shutdown logic when 48 V system rail exceeds safe margin in industrial PLC modules. IC Role / Device Role / Timing Role: Voltage threshold detector enabling comparator-based fault response. Use Value: Sharp knee at 47 V with <170 μA leakage below 37.6 V ensures clean digital transition without false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B47 | ±2 % tolerance (46.1 V–47.9 V), higher 400 Ω rdif | Acceptable where ±0.94 V regulation window suffices and cost sensitivity outweighs precision | Select for cost-driven consumer products with relaxed voltage stability requirements |
| MMBZ5265B | ±5 % tolerance (44.65 V–49.35 V), 350 mW Ptot, SOT-23 package | Requires PCB layout change due to larger footprint and different thermal profile | Choose when legacy SOT-23 assembly lines are in place and tighter tolerance is not critical |
Compared with BZX384-A47X, BZX384-B47 trades 1 % accuracy for lower unit cost, while MMBZ5265B offers higher power but sacrifices both tolerance and package compatibility-making the A47X optimal for new designs demanding precision in ultra-compact footprints.
Availability
BZX384-A47X is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and signal-level translation requiring stable component supply across consumer electronics, industrial control modules, and telecom interface designs.
Supply support for BZX384-A47X 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 leadership in automotive-qualified and industrial-grade components.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered specifically for stable, low-power voltage regulation in space-constrained surface-mount applications.
FAQ
What is the guaranteed Zener voltage range for BZX384-A47X at 2 mA test current?
The BZX384-A47X has a guaranteed breakdown voltage range of 46.53 V to 47.47 V when measured at IZ = 2 mA and Tj = 25 °C, reflecting its ±1 % tolerance specification per the official Nexperia datasheet Rev. 4.
Can BZX384-A47X be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device or active regulation instead.
Is the SOD323 package lead-free and RoHS compliant?
Yes-Nexperia confirms the BZX384-A47X meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations and halogen-free molding compound, as stated in the official product compliance documentation.
What is the maximum allowable reverse voltage before Zener conduction begins?
At IR = 170 μA, the reverse voltage is specified as 37.6 V. Below this, leakage remains negligible; conduction rises sharply above 46.53 V, confirming the device remains effectively open-circuit until reaching its rated Zener threshold.
BZX384-A47X 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:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A47X FAQ
1.How can I place an order for BZX384-A47X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A47X 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-A47X reliable?
The price and inventory of BZX384-A47X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A47X is usually 5 days.
3.What payment methods are accepted for BZX384-A47X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A47X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A47X?
BZX384-A47X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A47X 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-A47X?
For technical support, including BZX384-A47X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A47X requirements.
6.How does Aetrix verify that BZX384-A47X is sourced from the original manufacturer or authorized distributors?
All BZX384-A47X 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-A47X meets industry standards.
7.What is the process for return or replacement of BZX384-A47X?
All BZX384-A47X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A47X, 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-A47X part is unused and in its original packaging.
Return procedure for BZX384-A47X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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