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Nexperia USA Inc. BZX384-C51F
- Part No.:
- BZX384-C51F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C51F.pdf
- Description:
- DIODE ZENER 51V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
BZX384-C51F from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 51 V nominal breakdown voltage at 2 mA test current, 400 Ω maximum differential resistance, and 180 μA reverse current at 38.8 V, used for precision low-power voltage reference and overvoltage clamping in power supply feedback paths.
For engineers reviewing the BZX384-C51F datasheet, BZX384-C51F pinout, BZX384-C51F application, or BZX384-C51F equivalent, this page delivers verified electrical parameters, thermal performance data, cathode/anode terminal mapping, real-world regulation use cases, and validated alternative parts with documented voltage tolerance and dynamic resistance differences.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current above its specified Zener voltage (VZ = 48.0–54.0 V). Its temperature coefficient of +0.05 mV/K at IZ = 2 mA ensures minimal drift across industrial temperature ranges (−65 °C to +150 °C).
Designed for surface-mount PCB integration, it features a 300 mW total power dissipation limit at Tamb ≤ 25 °C on FR4 board, with non-repetitive peak reverse power handling up to 40 W for 100 μs pulses-enabling transient surge suppression without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48.0 V to 54.0 V at IZ = 2 mA - defines regulated output range under standard bias |
| Differential Resistance (rdif) | ≤400 Ω - determines regulation stiffness; lower values improve load/line regulation |
| Reverse Current (IR) | ≤180 μA at VR = 38.8 V - specifies leakage before breakdown onset |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - enables use as low-drop rectifier or ESD clamp in forward mode |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports transient overvoltage protection in DC rails |
| Junction-to-Ambient Rth | 415 K/W - limits steady-state power handling to ~72 mW at ΔT = 30 K rise |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package: 2-pin, small outline, cathode-marked with bar on top surface; footprint compatible with reflow and wave soldering per Nexperia's recommended land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % voltage tolerance | Enables cost-sensitive designs where tight regulation is not required, e.g., non-critical biasing |
| 300 mW total power dissipation | Supports continuous operation in compact 5 V–24 V auxiliary supplies without heatsinking |
| 40 W non-repetitive peak power | Clamps short-duration surges (e.g., ESD, inductive kickback) without failure |
| 150 °C max junction temperature | Permits deployment in high-ambient environments such as industrial motor drives and LED drivers |
Applications
| Power Supply Feedback Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Shunt reference connected between optocoupler input and ground, setting precise feedback threshold. Use Value: 48.0–54.0 V Zener range matches common 48 V telecom and PoE+ secondary-side sensing requirements. |
Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes on sensor lines. IC Role / Device Role / Timing Role: Reverse-biased clamp placed between signal line and ground, conducting only above 51 V. Use Value: 40 W pulse rating absorbs 1 kV ESD events (IEC 61000-4-2 Level 4) without degradation. |
| Low-Power Bias Voltage Generator | ADC Reference Stabilizer |
|
Use Scenario: Providing stable bias for op-amp input stages or transistor base drive in battery-powered sensors. IC Role / Device Role / Timing Role: Zener diode + series resistor forms passive voltage source for analog front-end circuitry. Use Value: 400 Ω dynamic resistance ensures <1 % output variation across 0.1–2 mA load current changes. |
Use Scenario: Improving accuracy of 12-bit ADC measurements in industrial data loggers. IC Role / Device Role / Timing Role: Low-noise voltage reference feeding ADC reference pin, replacing higher-cost bandgap ICs. Use Value: +0.05 mV/K tempco yields <0.3 % full-scale error drift from −40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B51 | ±2 % tolerance (49.9–52.1 V), 200 Ω rdif | Higher precision, lower dynamic impedance - suited for feedback loops demanding tighter regulation | Select when VZ stability under varying load is critical; requires tighter layout control due to lower rdif |
| MMSZ5257B | ±5 % tolerance (48.45–53.55 V), 500 Ω rdif, SOD-123 package | Larger footprint, higher thermal resistance - less suitable for dense PCBs but easier hand-soldering | Choose for legacy designs using SOD-123 footprints or where procurement favors ON Semiconductor stock |
Compared with BZX384-C51F, BZX384-B51 offers superior regulation accuracy and lower impedance at the cost of higher unit price, while MMSZ5257B trades compactness for mechanical robustness and broader distributor availability-making each optimal for distinct design priorities.
Availability
BZX384-C51F is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage protection clamps, and low-power bias voltage generators requiring stable component supply across industrial, instrumentation, and communications equipment lifecycles.
Supply support for BZX384-C51F 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 global semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume logic, discrete, and MOSFET solutions with emphasis on reliability and energy efficiency.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered specifically for space-constrained, low-power voltage regulation and clamping in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current for BZX384-C51F at 25 °C?
The maximum continuous reverse current is determined by power dissipation limits: at 25 °C ambient and 300 mW Ptot, the device supports up to ~5.9 mA (300 mW ÷ 51 V). This assumes no additional thermal resistance beyond the specified 415 K/W junction-to-ambient value on standard FR4 PCB.
Can BZX384-C51F be used in place of a 5.1 V Zener diode?
No-BZX384-C51F is a 51 V device, not 5.1 V. The "51" in the part number denotes nominal Zener voltage, not a variant code. Using it as a 5.1 V reference would result in no conduction below 48 V, causing complete circuit failure in low-voltage applications.
How does the ±5 % tolerance affect regulation accuracy in a feedback loop?
At 51 V nominal, ±5 % means actual VZ falls between 48.0 V and 54.0 V. In a feedback divider, this introduces up to ±3 % output voltage error if untrimmed. For tighter regulation, use BZX384-B51 (±2 %) or add calibration in firmware or hardware trimming.
Is BZX384-C51F suitable for automotive applications?
No-this part is non-automotive qualified per Nexperia's revision history (Rev. 4, Jan 2023). It lacks AEC-Q200 qualification and automotive-grade screening. For automotive use, select Nexperia's BZX384-Q series or equivalent qualified Zeners with extended temperature and reliability validation.
BZX384-C51F 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):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 180 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 35.7 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-C51F FAQ
1.How can I place an order for BZX384-C51F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C51F 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-C51F reliable?
The price and inventory of BZX384-C51F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C51F is usually 5 days.
3.What payment methods are accepted for BZX384-C51F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C51F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C51F?
BZX384-C51F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C51F 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-C51F?
For technical support, including BZX384-C51F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C51F requirements.
6.How does Aetrix verify that BZX384-C51F is sourced from the original manufacturer or authorized distributors?
All BZX384-C51F 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-C51F meets industry standards.
7.What is the process for return or replacement of BZX384-C51F?
All BZX384-C51F units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C51F, 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-C51F part is unused and in its original packaging.
Return procedure for BZX384-C51F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C51F Tags
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MM5Z5V1ST1G
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