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Nexperia USA Inc. BZX384-B56F
- Part No.:
- BZX384-B56F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B56F.pdf
- Description:
- DIODE ZENER 56V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
BZX384-B56F 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, 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-B56F datasheet, BZX384-B56F pinout, BZX384-B56F application, or BZX384-B56F equivalent, key selection criteria include its 56 V Zener voltage with ±2 % tolerance, 2 mA test current, 425 Ω maximum differential resistance, 0.05 mV/K temperature coefficient, and suitability for space-constrained PCBs requiring stable low-current regulation.
Technical Context
This device operates in reverse-bias breakdown mode to maintain a stable 56 V reference across load variations. Its Zener voltage is specified at IZ = 2 mA per Table 9, with typical temperature coefficient of +0.05 mV/K and maximum differential resistance of 425 Ω at that current.
The SOD323 package enables surface-mount integration with thermal resistance Rth(j-a) = 415 K/W (free air) and Rth(j-sp) = 110 K/W (to solder point), supporting reliable operation up to 150 °C junction temperature under defined PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V nominal at IZ = 2 mA; ±2 % tolerance ensures tight regulation band for reference applications |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB; defines continuous DC power handling limit |
| Differential Resistance (rdif) | ≤425 Ω at IZ = 2 mA; determines output impedance and regulation sensitivity to current changes |
| Temperature Coefficient (SZ) | +0.05 mV/K at IZ = 2 mA; indicates minimal drift over temperature for stable reference use |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 μs; supports transient overvoltage clamping without damage |
| Reverse Current (IR) | ≤200 μA at VR = 45 V; quantifies leakage below breakdown, critical for low-power standby circuits |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; defines conduction loss when used in forward-biased protection paths |
Pinout & Package
Package: SOD323 (SC-76), 2-terminal surface-mount plastic package with cathode marked by a bar on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; connected to regulated output node in shunt configuration |
| 2 | Anode (A) | Positive terminal; tied to ground or lower-potential rail in standard Zener regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation than ±5 % variants, reducing need for post-regulation trimming in precision supplies |
| Low-profile SOD323 package | 0.95 mm height and 2.7 × 1.8 mm footprint allow dense placement on compact PCBs without thermal shadowing |
| 40 W surge capability | Supports single-event ESD or lightning-induced transients without degradation when properly decoupled |
| 150 °C max junction temperature | Permits operation in high-ambient environments such as industrial control enclosures or automotive under-hood proximity |
| 0.05 mV/K tempco | Minimizes voltage drift over -65 °C to +150 °C range, improving long-term stability in unregulated thermal zones |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
|
Use Scenario: Stabilizing bias voltage for op-amp input stages in 4–20 mA loop transmitters operating at 24 V supply. IC Role / Device Role / Timing Role: Shunt Zener reference providing fixed 56 V rail for overvoltage protection circuitry upstream of signal chain. Use Value: Prevents latch-up during 36 V line surges while maintaining <100 μA quiescent current draw due to low IR at 45 V. |
Use Scenario: Clamping transient spikes on USB-C VBUS line during hot-plug events in portable docking stations. IC Role / Device Role / Timing Role: Fast-acting overvoltage clamp absorbing 40 W pulses within 100 μs to protect downstream PMICs. Use Value: Limits VBUS to ≤56.5 V during 1 kV ESD contact discharge, verified per IEC 61000-4-2 Level 4 testing. |
| Automotive Body Control Module (Non-Automotive Qualified) | IoT Node Battery Monitor Reference |
|
Use Scenario: Providing stable reference for microcontroller ADC measuring 12 V battery voltage in aftermarket telematics units. IC Role / Device Role / Timing Role: Low-power Zener reference generating known 56 V reference scaled via resistor divider for 0–16 V measurement range. Use Value: Delivers ±0.2 V accuracy over -40 °C to +85 °C ambient due to low tempco and tight tolerance, eliminating calibration drift. |
Use Scenario: Supplying precise reference for coulomb counter IC monitoring Li-ion cell voltage in smart meter battery packs. IC Role / Device Role / Timing Role: Precision shunt regulator establishing 56 V reference for ratio-metric ADC conversion of 0–4.2 V cell voltage. Use Value: Enables <0.5 % full-scale voltage measurement error with only 2 mA operating current, extending 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-B56 | Same 56 V ±2 % rating, but SOD123 package (larger footprint, higher Rth(j-a) = 500 K/W) | Less suitable for ultra-dense layouts; requires larger PCB area and derating above 70 °C ambient | Select when legacy board layout uses SOD123 or when higher surge margin (50 W PZSM) is required |
| Vishay BZX384-C56 | Same SOD323 package but ±5 % tolerance (53.2–58.8 V range) and higher 500 Ω rdif | Acceptable for non-critical clamping where cost is prioritized over regulation accuracy | Select for cost-sensitive consumer electronics where ±5 % tolerance meets system-level margin requirements |
Compared with BZX384-B56F, the BZT52-B56 trades package miniaturization for higher surge robustness, while the BZX384-C56 sacrifices regulation precision and dynamic impedance for lower unit cost-making BZX384-B56F optimal for space-constrained, accuracy-driven designs.
Availability
BZX384-B56F is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power delivery protection, IoT battery monitoring, and aftermarket automotive electronics requiring stable component supply with consistent parametric performance.
Supply support for BZX384-B56F 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, headquartered in Nijmegen, Netherlands.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered for low-power voltage reference and overvoltage protection in space-constrained, thermally demanding applications across industrial and consumer markets.
FAQ
What is the recommended test current for measuring VZ on BZX384-B56F?
The datasheet specifies VZ = 56 V at IZ = 2 mA (Table 9), not the common 5 mA used for lower-voltage Zeners. Using 2 mA ensures measurement aligns with published tolerance, tempco, and rdif values-deviating causes up to ±0.3 V error due to knee curvature.
Can BZX384-B56F be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative tempco and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. For >300 mW needs, use a single higher-rated device like PZM56xx or add active current-sharing circuitry.
Is BZX384-B56F qualified for automotive applications?
No-this part is explicitly non-automotive qualified per Revision History (Section 13). Nexperia offers separate -Q qualified variants (e.g., BZX384-B56-Q) with AEC-Q101 stress testing, extended temperature screening, and PPAP documentation for automotive use.
How does the SOD323 package affect thermal performance in reflow-soldered assemblies?
When mounted per Figure 12 footprint on FR4 with single-sided 1 oz copper, Rth(j-sp) = 110 K/W allows 300 mW dissipation up to 85 °C ambient. Exceeding the 0.6 mm pad width or omitting thermal relief vias increases junction temperature by ≥15 °C, risking premature failure.
BZX384-B56F 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-B56F FAQ
1.How can I place an order for BZX384-B56F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B56F 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-B56F reliable?
The price and inventory of BZX384-B56F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B56F is usually 5 days.
3.What payment methods are accepted for BZX384-B56F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B56F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B56F?
BZX384-B56F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B56F 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-B56F?
For technical support, including BZX384-B56F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B56F requirements.
6.How does Aetrix verify that BZX384-B56F is sourced from the original manufacturer or authorized distributors?
All BZX384-B56F 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-B56F meets industry standards.
7.What is the process for return or replacement of BZX384-B56F?
All BZX384-B56F units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B56F, 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-B56F part is unused and in its original packaging.
Return procedure for BZX384-B56F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B56F Tags
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