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Nexperia USA Inc. BZX384-B56Z
- Part No.:
- BZX384-B56Z
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B56Z.pdf
- Description:
- DIODE ZENER 56V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:26,984
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Product details
Overview
BZX384-B56Z from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 56 V nominal breakdown voltage at 2 mA test current, 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 sensor interface circuits.
For engineers reviewing the BZX384-B56Z datasheet, BZX384-B56Z pinout, BZX384-B56Z application, or BZX384-B56Z equivalent, key selection criteria include its 56 V Zener voltage with ±2 % tolerance, 40 Ω typical differential resistance at IZ = 2 mA, 0.9 V forward voltage at 10 mA, thermal resistance of 415 K/W (junction-to-ambient), and cathode-anode polarity marking on SOD323 body.
Technical Context
This device operates in reverse-biased Zener breakdown mode to maintain stable voltage across load variations and temperature shifts. Its 56 V working voltage is specified at IZ = 2 mA, with a temperature coefficient of +12.6 mV/K and maximum differential resistance of 425 Ω per datasheet Table 9.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it supports pulse operation up to 40 W for tp ≤ 100 μs and exhibits 0.05 μA reverse leakage at VR = 44.8 V (80 % of VZ), enabling reliable regulation in space-constrained consumer and industrial signal conditioning nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V nominal at IZ = 2 mA; ±2 % tolerance ensures 54.88–57.12 V regulation window under production conditions |
| Differential Resistance (rdif) | 425 Ω max at IZ = 2 mA; defines output impedance affecting load regulation error |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; enables predictable forward conduction during transient clamping |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on standard FR4 PCB; sets continuous DC power limit for thermal design |
| Non-repetitive Peak Reverse Power | 40 W for tp ≤ 100 μs; supports surge suppression in ESD-coupled interfaces |
| Junction Temperature (Tj) | 150 °C max; constrains ambient operating range when derated per Rth(j-a) = 415 K/W |
| Reverse Current (IR) | 0.05 μA max at VR = 44.8 V; ensures minimal quiescent current in high-impedance bias networks |
Pinout & Package
The BZX384-B56Z is housed in a SOD323 (SC-76) plastic surface-mount package measuring 1.8 mm × 1.35 mm × 0.95 mm, with cathode marked by a bar on the component body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity mark aligns with PCB silkscreen cathode indicator |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms 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 in 56 V reference designs |
| 300 mW power rating | Supports continuous operation in low-current bias networks without heatsinking on standard FR4 layouts |
| SOD323 footprint compatibility | Matches JEDEC SC-76 standard, allowing drop-in replacement in existing 0805-equivalent land patterns |
| 150 °C maximum junction temperature | Permits operation in extended-temperature industrial environments when derated per thermal resistance |
| 0.05 μA reverse leakage at 80 % VZ | Minimizes error in high-impedance voltage divider feedback paths used with op-amp regulators |
Applications
| Power Supply Reference | Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 56 V reference for ADC biasing or DAC output scaling in industrial data acquisition modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference, absorbing excess current to hold node voltage constant. Use Value: ±2 % tolerance and <425 Ω dynamic impedance ensure reference drift remains within 1.12 V over full temperature range, meeting 12-bit system accuracy requirements. | Use Scenario: Clamping amplifier input to prevent overvoltage damage from transients in 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Reverse-biased protection element limiting input swing to 56 V ±2 % during surge events. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs surges without degradation, preserving downstream op-amp integrity. |
| Microcontroller Reset Circuit | LED Driver Voltage Clamp |
Use Scenario: Generating clean reset threshold in battery-powered IoT nodes using 56 V rail monitoring. IC Role / Device Role / Timing Role: Zener-based comparator input reference, triggering reset when main supply falls below 56 V × 0.9. Use Value: 0.05 μA leakage at 44.8 V prevents false resets due to reference node loading in ultra-low-power sleep modes. | Use Scenario: Limiting open-circuit voltage in constant-current LED drivers to protect series-connected strings. IC Role / Device Role / Timing Role: Shunt regulator clamping driver output to 56 V during no-load or open-wire fault conditions. Use Value: 300 mW continuous dissipation handles worst-case fault energy without thermal runaway, avoiding catastrophic failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C56 | ±5 % tolerance (53.2–58.8 V range) vs. ±2 % (54.88–57.12 V); higher max rdif = 425 Ω | Acceptable where 56 V accuracy < ±3.5 V suffices; less suitable for precision references | Select for cost-sensitive designs where tighter regulation is unnecessary |
| MMSZ5255B | Same 56 V nominal, but ±5 % tolerance and SOD-123 package; Ptot = 500 mW | Higher power handling allows greater surge margin but requires larger PCB footprint | Choose when board space permits and 500 mW continuous dissipation is required |
Compared with BZX384-C56, the BZX384-B56Z delivers tighter voltage control critical for reference stability; versus MMSZ5255B, it trades power margin for compact SOD323 layout efficiency in space-constrained designs.
Availability
BZX384-B56Z is available at Aetrix Electronics and suitable for industrial sensor interfaces, battery management systems, and embedded power supply monitoring requiring stable component supply and traceable sourcing.
Supply support for BZX384-B56Z 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 manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume logic, discrete, and MOSFET solutions with emphasis on reliability and efficiency.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for low-power voltage reference and overvoltage protection in consumer, industrial, and communications equipment where small size and tight tolerance are essential.
FAQ
What is the Zener test current for BZX384-B56Z?
The BZX384-B56Z is characterized at IZ = 2 mA per datasheet Table 9, which defines its nominal 56 V breakdown voltage and differential resistance. This differs from lower-voltage variants tested at 5 mA, reflecting optimized performance for mid-range Zener voltages.
How does the ±2 % tolerance affect circuit accuracy?
The ±2 % tolerance means the actual Zener voltage falls between 54.88 V and 57.12 V at 2 mA. In a 12-bit system with 56 V full-scale, this introduces up to ±1.12 V absolute error - acceptable for non-critical biasing but insufficient for metrology-grade references without calibration.
Can BZX384-B56Z be used in parallel for higher power?
No - Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. For higher power, select a single higher-rated device like MMSZ5255B or implement active regulation instead.
What is the significance of the 'Z' suffix in BZX384-B56Z?
The 'Z' suffix denotes the specific marking code per Nexperia's ordering table: BZX384-B56 corresponds to marking code 'N6', and 'Z' indicates tape-and-reel packaging per standard SOD323 carrier format, not a functional variant.
BZX384-B56Z 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):
- 56 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 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-B56Z FAQ
1.How can I place an order for BZX384-B56Z through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B56Z 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-B56Z reliable?
The price and inventory of BZX384-B56Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B56Z is usually 5 days.
3.What payment methods are accepted for BZX384-B56Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B56Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B56Z?
BZX384-B56Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B56Z 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-B56Z?
For technical support, including BZX384-B56Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B56Z requirements.
6.How does Aetrix verify that BZX384-B56Z is sourced from the original manufacturer or authorized distributors?
All BZX384-B56Z 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-B56Z meets industry standards.
7.What is the process for return or replacement of BZX384-B56Z?
All BZX384-B56Z units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B56Z, 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-B56Z part is unused and in its original packaging.
Return procedure for BZX384-B56Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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