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Nexperia USA Inc. BZX384-B20,115
- Part No.:
- BZX384-B20,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B20,115.pdf
- Description:
- DIODE ZENER 20V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:27,072
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Product details
Overview
BZX384-B20,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 20 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 and signal conditioning circuits.
For engineers reviewing the BZX384-B20,115 datasheet, BZX384-B20,115 pinout, BZX384-B20,115 application, or BZX384-B20,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance (415 K/W junction-to-ambient), differential resistance (≤10 Ω at IZ = 5 mA), and reverse current (≤50 nA at VR = 16 V).
Technical Context
This device operates in reverse-bias breakdown mode to maintain stable DC voltage across its terminals under varying load or input conditions. Its 20 V nominal Zener voltage is specified at 5 mA test current with ±2 % tolerance, and exhibits a positive temperature coefficient of +14 mV/K at IZ = 5 mA.
The diode supports pulse operation up to 40 W for 100 μs pulses and delivers ≤0.9 V forward voltage at 10 mA. Its 110 K/W junction-to-solder-point thermal resistance enables effective heat transfer to PCB copper when mounted on standard FR4 with tin-plated single-sided copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.6 V to 20.4 V at IZ = 5 mA - defines regulation setpoint with ±2 % accuracy |
| Differential Resistance (rdiff) | ≤10 Ω - ensures minimal output voltage variation under load current changes |
| Reverse Current (IR) | ≤50 nA at VR = 16 V - guarantees low leakage in standby or high-impedance bias networks |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB - sets continuous DC power handling limit |
| Non-repetitive Peak Reverse Power | 40 W for tp = 100 μs - enables transient surge suppression without failure |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - determines conduction loss in series protection configurations |
| Junction-to-Ambient Rth | 415 K/W - indicates thermal performance in free-air mounting on standard PCB |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 2.3 mm × 1.35 mm footprint, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation than ±5 % variants, reducing need for post-regulation trimming |
| Low differential resistance (≤10 Ω) | Maintains voltage stability across ±1 mA load shifts in feedback or reference paths |
| 40 W non-repetitive peak power rating | Withstands ESD or inductive kick transients without degradation in protection circuits |
| SOD323 compact footprint (2.3 × 1.35 mm) | Supports high-density layout in space-constrained consumer and portable electronics |
| 150 °C maximum junction temperature | Allows reliable operation in thermally demanding environments such as industrial control modules |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in low-current linear regulators or op-amp reference inputs. IC Role / Device Role / Timing Role: Provides fixed 20 V reference point for error amplifier comparison. Use Value: Delivers ±2 % accuracy and <10 Ω dynamic impedance to minimize reference drift under load variation. |
Use Scenario: Protecting ADC inputs or microcontroller GPIO pins from transient overvoltage events. IC Role / Device Role / Timing Role: Shunts excess energy above 20.4 V to ground before damage occurs. Use Value: Activates within nanoseconds and absorbs up to 40 W surges, preserving downstream silicon integrity. |
| Signal Level Translation | Current Source Biasing |
Use Scenario: Generating stable bias voltages for analog front-end amplifiers in sensor interfaces. IC Role / Device Role / Timing Role: Sets common-mode voltage for differential receivers operating at 20 V headroom. Use Value: Maintains <50 nA leakage at 16 V reverse bias, preventing signal path contamination. |
Use Scenario: Establishing precise current through high-side current-sense resistors in battery monitors. IC Role / Device Role / Timing Role: Regulates voltage across sense resistor to fix ISENSE = (VZ − VBE)/RSENSE. Use Value: Enables ±2 % current accuracy with minimal thermal drift due to +14 mV/K coefficient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-A20,115 | ±1 % tolerance, lower rdiff (≤7 Ω), higher cost | Better suited for metrology-grade references where 0.2 V tighter tolerance matters | Select when absolute voltage accuracy outweighs cost sensitivity |
| MMBZ5243B,115 | Same 20 V nominal, ±5 % tolerance, SOT-23 package, higher Ptot (350 mW) | Larger footprint but better thermal margin for sustained 200 mA bias currents | Select when board space allows SOT-23 and higher continuous power is required |
Compared with BZX384-A20,115, this part trades 1 % tolerance for lower unit cost and identical SOD323 fit; versus MMBZ5243B,115, it offers smaller footprint and tighter tolerance but lower power headroom-making it optimal for compact, cost-sensitive 20 V reference designs.
Availability
BZX384-B20,115 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and signal level translation requiring stable component supply in high-mix consumer, industrial control, and automotive body electronics programs.
Supply support for BZX384-B20,115 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, 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, cost-sensitive applications across consumer, computing, and industrial segments.
FAQ
What is the maximum continuous reverse current this diode can sustain at 20 V?
The BZX384-B20,115 is not rated for continuous reverse conduction at 20 V; it operates in Zener breakdown only under controlled bias. At VR = 16 V, reverse current is ≤50 nA. Sustained 20 V reverse bias exceeds its 20.4 V max VZ and risks thermal runaway unless current is limited externally to ≤15 mA per derating curves.
Can this diode replace a 20 V Zener in an existing SOT-23 design?
No direct replacement: BZX384-B20,115 uses SOD323 (2.3 × 1.35 mm), while SOT-23 measures 2.9 × 1.3 mm with different pad layout and thermal path. Mechanical redesign and solder stencil adjustment are required; electrical behavior is similar but thermal resistance differs (415 K/W vs ~300 K/W for SOT-23).
How does temperature affect its 20 V regulation accuracy?
At IZ = 5 mA, the temperature coefficient is +14 mV/K. Over a 100 °C rise (25 °C to 125 °C), VZ increases by ~1.4 V - from 20.0 V to 21.4 V. For stable regulation across temperature, use with low-tempco bias networks or compensate in feedback loops.
Is this part qualified for automotive applications?
No. Per Nexperia's Rev. 4 datasheet, BZX384-B20,115 is non-automotive qualified. It lacks AEC-Q200 stress testing and automotive-grade screening. For automotive use, select the BZX384-Q series (e.g., BZX384-B20-Q) which undergoes extended temperature cycling, humidity testing, and vibration validation.
BZX384-B20,115 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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 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-B20,115 FAQ
1.How can I place an order for BZX384-B20,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B20,115 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-B20,115 reliable?
The price and inventory of BZX384-B20,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B20,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B20,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B20,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B20,115?
BZX384-B20,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B20,115 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-B20,115?
For technical support, including BZX384-B20,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B20,115 requirements.
6.How does Aetrix verify that BZX384-B20,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B20,115 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-B20,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B20,115?
All BZX384-B20,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B20,115, 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-B20,115 part is unused and in its original packaging.
Return procedure for BZX384-B20,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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