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Nexperia USA Inc. BZX384-C20/DG/B4X
- Part No.:
- BZX384-C20/DG/B4X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C20/DG/B4X.pdf
- Description:
- DIODE ZENER 20V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,715
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Product details
Overview
BZX384-C20/DG/B4X from Nexperia is a ±5 % 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-C20/DG/B4X datasheet, BZX384-C20/DG/B4X pinout, BZX384-C20/DG/B4X application, or BZX384-C20/DG/B4X equivalent, key selection criteria include its 20 V Zener voltage tolerance (±5 %), 225 Ω max differential resistance at IZ = 5 mA, 0.05 mV/K temperature coefficient, and SOD323 thermal resistance of 110 K/W to solder point.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a specified VZ of 18.8 V to 21.2 V at IZ = 5 mA and exhibits a low 0.05 mV/K temperature coefficient across its operating range. Its differential resistance remains ≤225 Ω under regulation current, enabling stable voltage reference performance in low-current bias networks.
The device supports pulsed surge handling up to 40 W (tp = 100 μs) and maintains safe operation within −65 °C to +150 °C ambient and junction temperature limits. Thermal resistance from junction to solder point is 110 K/W, confirming suitability for compact PCB layouts with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8 V to 21.2 V at IZ = 5 mA - defines regulated output voltage window for reference or clamping |
| Tolerance | ±5 % - specifies maximum deviation from nominal 20 V rating under standard test conditions |
| Differential Resistance (rdif) | ≤225 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets continuous DC power limit on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 μs - enables transient overvoltage suppression without failure |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - confirms low conduction loss when used in forward-biased protection paths |
| Temperature Coefficient (SZ) | 0.05 mV/K - quantifies VZ drift per degree Celsius, critical for temperature-stable references |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm body, 0.45 mm lead pitch, 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-to-cathode voltage establishes Zener breakdown |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for regulation current flow |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD323 footprint (1.35 × 0.85 mm) enables high-density placement in space-constrained consumer and industrial PCBs |
| Controlled Zener tolerance | ±5 % band ensures predictable regulation window for cost-sensitive applications where tight voltage accuracy is not required |
| Pulsed surge capability | 40 W non-repetitive peak power withstand allows use in ESD and transient-limited input protection stages |
| Thermal performance | 110 K/W junction-to-solder-point resistance supports reliable operation with minimal copper pour on standard FR4 |
| Low leakage current | ≤0.05 μA at VR = 16 V minimizes standby current draw in battery-powered voltage monitor circuits |
Applications
| Power Supply Reference | Signal-Level Clamping |
|---|---|
|
Use Scenario: Providing stable 20 V reference for ADC biasing or op-amp feedback networks in sensor interface modules. IC Role / Device Role / Timing Role: Zener diode functions as two-terminal shunt voltage reference, absorbing excess current to maintain fixed node voltage. Use Value: Delivers 20 V ±5 % regulation with ≤225 Ω dynamic impedance, ensuring <0.5 % reference error under 1 mA load variation. |
Use Scenario: Limiting analog signal swing to ±20 V in industrial data acquisition front-ends exposed to field transients. IC Role / Device Role / Timing Role: Bidirectional clamping element-cathode tied to signal line, anode grounded-to clip positive excursions above 20 V. Use Value: Withstands 40 W surge pulses, suppressing >1 kV fast transients without degradation while adding <1 pF capacitance at 0 V bias. |
| Overvoltage Protection | Low-Power Bias Network |
|
Use Scenario: Safeguarding microcontroller I/O pins against accidental 24 V rail misconnection in programmable logic controllers. IC Role / Device Role / Timing Role: Shunt protector placed between I/O line and ground, conducting only when voltage exceeds 20 V threshold. Use Value: Activates at 18.8 V minimum, clamps to ≤21.2 V, and dissipates fault energy within 300 mW continuous limit-preventing latch-up or gate oxide damage. |
Use Scenario: Generating precise bias points for JFET amplifiers or photodiode transimpedance stages in portable medical sensors. IC Role / Device Role / Timing Role: Passive voltage source establishing fixed DC offset in ultra-low-power analog signal chains. Use Value: Draws only 5 mA regulation current, consumes <100 μA standby leakage, and maintains <0.05 mV/K drift-enabling sub-mV stability over 0–70 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5243BS-7-F | 20 V nominal, ±5 %, SOD-123 package, 350 mW Ptot, 200 Ω rdif | Larger footprint (SOD-123), higher thermal resistance (250 K/W j-a), less suitable for ultra-dense layouts | Preferred where higher continuous power margin is needed and board space permits larger package |
| Vishay BZX384-C20-TP | Identical 20 V ±5 % spec, same SOD323 package, but rated for automotive AEC-Q200 qualification | Qualified for extended temperature (−55 °C to +150 °C) and vibration environments; higher cost | Select when design requires automotive-grade reliability documentation and stress testing compliance |
Compared with BZX384-C20/DG/B4X, the MMBZ5243BS-7-F offers higher power headroom but sacrifices board-area efficiency, while the BZX384-C20-TP delivers identical electrical performance with certified automotive robustness-making it viable only where qualification mandates override cost and sourcing constraints.
Availability
BZX384-C20/DG/B4X is available at Aetrix Electronics and suitable for low-power voltage reference, analog signal clamping, and overvoltage protection requiring stable component supply in consumer electronics, industrial control modules, and portable instrumentation.
Supply support for BZX384-C20/DG/B4X 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 optimized for efficiency and miniaturization in high-volume electronics.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered for cost-effective, space-efficient voltage referencing and protection in consumer, computing, and industrial power management systems.
FAQ
What is the maximum continuous reverse current this diode can sustain at 20 V?
At 20 V reverse bias and Tamb = 25 °C, the BZX384-C20/DG/B4X sustains ≤15 mA continuous current before exceeding its 300 mW power limit (P = V × I → I = 300 mW / 20 V = 15 mA). Operation beyond this requires derating per thermal resistance curves or forced cooling.
Does this part have automotive qualification?
No. The BZX384-C20/DG/B4X is a standard industrial-grade device, not qualified to AEC-Q200. Nexperia offers automotive variants (e.g., BZX384-C20-Q) with extended temperature screening and qualification testing-these carry distinct part numbers and packaging markings.
How does the 0.05 mV/K temperature coefficient impact regulation accuracy over temperature?
Over a 100 °C range (−25 °C to +75 °C), the coefficient contributes ±5 mV drift (0.05 mV/K × 100 K), or ±0.025 % of 20 V. Combined with ±5 % initial tolerance, total worst-case VZ variation is ±5.025 %-acceptable for non-critical biasing but insufficient for metrology-grade references.
Can this diode be used in series for higher voltage regulation?
Yes, but with caution: series connection multiplies voltage tolerance (±5 % each → ±10 % for two), increases total dynamic resistance, and requires matched thermal coupling to avoid current hogging. For >20 V needs, single higher-voltage Zeners (e.g., BZX384-C33) are preferred for stability and predictability.
BZX384-C20/DG/B4X 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:
- ±5%
- 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C20/DG/B4X FAQ
1.How can I place an order for BZX384-C20/DG/B4X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C20/DG/B4X 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-C20/DG/B4X reliable?
The price and inventory of BZX384-C20/DG/B4X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C20/DG/B4X is usually 5 days.
3.What payment methods are accepted for BZX384-C20/DG/B4X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C20/DG/B4X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C20/DG/B4X?
BZX384-C20/DG/B4X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C20/DG/B4X 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-C20/DG/B4X?
For technical support, including BZX384-C20/DG/B4X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C20/DG/B4X requirements.
6.How does Aetrix verify that BZX384-C20/DG/B4X is sourced from the original manufacturer or authorized distributors?
All BZX384-C20/DG/B4X 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-C20/DG/B4X meets industry standards.
7.What is the process for return or replacement of BZX384-C20/DG/B4X?
All BZX384-C20/DG/B4X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C20/DG/B4X, 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-C20/DG/B4X part is unused and in its original packaging.
Return procedure for BZX384-C20/DG/B4X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C20/DG/B4X Tags
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