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Nexperia USA Inc. BZX38450-C56F
- Part No.:
- BZX38450-C56F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C56F.pdf
- Description:
- DIODE ZENER 56V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,010
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Product details
Overview
BZX38450-C56F from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and clamping in battery-powered systems. It provides a nominal 56 V Zener voltage at 50 µA test current, with ±5 % tolerance, 300 mW total power dissipation, and 400 Ω typical differential resistance at IZ = 2 mA.
For engineers reviewing the BZX38450-C56F datasheet, BZX38450-C56F pinout, BZX38450-C56F application, or BZX38450-C56F equivalent, key selection criteria include low-bias operation capability, thermal resistance (Rth(j-a) = 415 K/W), reverse leakage performance at elevated temperature, and compatibility with compact PCB layouts requiring SOD323 footprint.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across a wide range of reverse bias currents (50 µA to 2 mA). Its Zener breakdown mechanism delivers predictable regulation with a temperature coefficient of +5.7 mV/K at 56 V, enabling predictable drift compensation in analog sensing circuits.
The SOD323 package supports reflow and wave soldering per JEDEC standards, with defined thermal resistance from junction to ambient (415 K/W) and junction to solder point (110 K/W), ensuring reliable thermal management in space-constrained designs without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 56 V nominal at IZ = 50 µA; defines precise clamping threshold for overvoltage protection or reference generation |
| Tolerance | ±5 % (C-series); enables cost-effective selection where tight regulation is not required |
| Differential Resistance rdiff | 400 Ω max at IZ = 2 mA; determines regulation stiffness and load-induced voltage deviation |
| Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C on FR4 PCB; sets maximum continuous power handling in standard layout |
| Forward Voltage VF | 0.9 V max at IF = 10 mA; defines conduction loss when used in bidirectional ESD clamp configurations |
| Reverse Leakage IR | 0.05 µA max at VR = 44.8 V; ensures minimal quiescent current in high-impedance bias networks |
| Junction Temperature | 150 °C max; defines upper thermal limit for sustained operation in industrial environments |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in micro-power sensor biasing and energy-harvesting circuits |
| Optimized leakage profile | Intentional minor rise in leakage improves switching speed and reduces noise in transient suppression |
| Compact SMD footprint | SOD323 package allows placement in dense layouts without compromising thermal performance |
| Stable temperature coefficient | +5.7 mV/K at 56 V enables predictable drift modeling for calibration-critical references |
| High surge robustness | 40 W non-repetitive peak reverse power (100 µs pulse) supports transient overvoltage handling |
Applications
| Portable Battery Monitor | Industrial Sensor Reference |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in wearable health devices with ultra-low standby current. IC Role / Device Role / Timing Role: Zener reference for ADC input scaling and overvoltage detection threshold. Use Value: 50 µA test current enables direct connection to high-impedance divider without loading error; ±5 % tolerance suffices for SOC estimation accuracy. |
Use Scenario: Providing stable excitation voltage for resistive bridge sensors in factory automation transmitters. IC Role / Device Role / Timing Role: Precision shunt reference replacing higher-power alternatives in 4–20 mA loop-powered modules. Use Value: 400 Ω differential resistance minimizes output impedance variation across operating temperature (−55 °C to +150 °C). |
| IoT Node ESD Clamp | Programmable Power Supply Feedback |
Use Scenario: Protecting UART/USB data lines against electrostatic discharge in edge-node gateways. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor using forward conduction and Zener breakdown. Use Value: 0.9 V forward drop limits signal distortion; 56 V breakdown avoids false triggering during normal 3.3 V/5 V bus operation. |
Use Scenario: Setting output voltage in adjustable DC-DC converters via optocoupler feedback network. IC Role / Device Role / Timing Role: Secondary-side voltage reference determining regulation setpoint accuracy. Use Value: Stable 56 V rating allows direct use with common TL431-based feedback topologies requiring >36 V references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5256B | Same 56 V nominal, ±5 %, but rated at 200 mW Ptot and uses SOT-23 package | Higher thermal resistance (500 K/W) limits power handling in compact layouts | Select when existing SOT-23 footprint must be retained and derated power is acceptable |
| Vishay BZX384-C56 | Identical electrical specs and SOD323 package, but manufactured under different quality flow (AEC-Q200 not claimed) | No automotive qualification; identical performance in commercial-grade instrumentation | Choose for cost-sensitive industrial applications where Nexperia's extended reliability testing is not required |
Compared with MMBZ5256B, BZX38450-C56F offers +100 mW power margin and lower thermal resistance for better stability under load; versus BZX384-C56, it provides traceable Nexperia process control and documented long-term parametric consistency across production lots.
Availability
BZX38450-C56F is available at Aetrix Electronics and suitable for portable battery monitors, industrial sensor references, IoT node ESD clamps, and programmable power supply feedback circuits requiring stable component supply with consistent Zener voltage and low-leakage behavior.
Supply support for BZX38450-C56F 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 leading semiconductor manufacturer specializing in high-volume logic, discrete, and MOSFET solutions, with global R&D and manufacturing infrastructure focused on reliability and efficiency.
The BZX38450 series belongs to Nexperia's precision low-current Zener diode product line, engineered specifically for battery-powered, space-constrained, and low-quiescent-current applications demanding stable voltage references without active circuitry.
FAQ
What is the maximum reverse voltage before breakdown for BZX38450-C56F?
The nominal Zener voltage is 56 V at 50 µA test current, with guaranteed minimum 53.2 V and maximum 58.8 V across the ±5 % tolerance band. Breakdown occurs within this range under specified test conditions; operation above 58.8 V risks exceeding absolute maximum ratings.
Can BZX38450-C56F be used in series for higher voltage reference generation?
No - series connection is not recommended due to mismatched temperature coefficients and leakage currents between units, which cause unequal voltage division and thermal runaway risk. Use a single higher-voltage Zener like BZX38450-C62F instead.
Is the SOD323 package compatible with standard reflow profiles?
Yes - the device is qualified for JEDEC J-STD-020D reflow, with peak temperature up to 260 °C. The recommended footprint matches Nexperia's Fig. 10 layout: 0.6 mm solder lands, 0.5 mm solder paste stencil openings, and 1.35 mm center-to-center pad spacing.
How does the "intentional minor rise of leakage current" affect circuit design?
This controlled leakage increase (per AN90031) reduces minority-carrier lifetime, lowering stored charge and improving turn-off speed during transient events. It enhances noise immunity in high-frequency sensing paths but requires verification of total bias current in ultra-low-power sleep modes.
BZX38450-C56F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-C56F FAQ
1.How can I place an order for BZX38450-C56F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C56F 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 BZX38450-C56F reliable?
The price and inventory of BZX38450-C56F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C56F is usually 5 days.
3.What payment methods are accepted for BZX38450-C56F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C56F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C56F?
BZX38450-C56F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C56F 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 BZX38450-C56F?
For technical support, including BZX38450-C56F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C56F requirements.
6.How does Aetrix verify that BZX38450-C56F is sourced from the original manufacturer or authorized distributors?
All BZX38450-C56F 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 BZX38450-C56F meets industry standards.
7.What is the process for return or replacement of BZX38450-C56F?
All BZX38450-C56F units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C56F, 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 BZX38450-C56F part is unused and in its original packaging.
Return procedure for BZX38450-C56F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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