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Nexperia USA Inc. BZX8850-C51YL
- Part No.:
- BZX8850-C51YL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850-C51YL.pdf
- Description:
- DIODE ZENER 51V 250MW DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:4,765
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Product details
Overview
BZX8850-C51YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 51 V nominal with ±5 % tolerance. It delivers stable reference voltage at 50 μA test current, features 400 Ω differential resistance at 2 mA, and exhibits 0.05 μA reverse leakage at rated voltage-optimized for battery-powered sensor nodes and low-power microcontroller I/O protection.
For engineers reviewing the BZX8850-C51YL datasheet, BZX8850-C51YL pinout, BZX8850-C51YL application, or BZX8850-C51YL equivalent, this page provides verified electrical characteristics, thermal behavior under FR4 PCB mounting, cathode/anode terminal mapping, and direct alternatives for low-bias voltage reference design.
Technical Context
This Zener operates in reverse breakdown mode with a specified working voltage of 50.0–52.0 V at IZ = 2 mA, and maintains a temperature coefficient of +0.05 mV/K-indicating near-zero drift across ambient temperatures. Its 400 Ω dynamic impedance ensures minimal output variation under small load shifts.
The device uses intentional minor leakage current enhancement per AN90031 to reduce switching noise and improve transient response in low-current bias networks. Thermal resistance is 500 K/W junction-to-ambient on standard FR4, limiting continuous power dissipation to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 51 V - precise reference point for overvoltage clamping or analog rail stabilization |
| Voltage Tolerance | ±5 % - defines 48.0–54.0 V functional window for production margining |
| Differential Resistance | 400 Ω at IZ = 2 mA - determines output impedance and regulation sensitivity to current change |
| Reverse Leakage Current | 0.05 μA at VR = 51 V - enables ultra-low quiescent current in always-on monitoring circuits |
| Forward Voltage | 0.9 V at IF = 10 mA - sets forward conduction threshold for bidirectional protection configurations |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - constrains maximum steady-state power on standard FR4 PCB |
| Junction Temperature Limit | 150 °C - defines absolute thermal ceiling before irreversible degradation |
Pinout & Package
SOD882 (DFN1006-2) is a leadless 2-terminal surface-mount package measuring 1.0 × 0.6 × 0.5 mm, with cathode indicated by a marking bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; reverse-biased terminal during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 μA - enables use in nanoamp-level standby circuits without compromising regulation accuracy |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces high-frequency noise and improves switching stability in feedback paths |
| Ultra-small footprint | DFN1006-2 (1.0 × 0.6 mm) - supports high-density layout in space-constrained wearables and IoT edge sensors |
| Two tolerance grades | ±2 % (B-series) and ±5 % (C-series) - allows cost/performance trade-off selection without redesign |
Applications
| Portable Sensor Biasing | Microcontroller I/O Protection |
|---|---|
Use Scenario: Providing stable 51 V bias to MEMS pressure transducer bridge in battery-powered environmental monitor. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed excitation potential for ratiometric measurement. Use Value: 0.05 μA leakage preserves multi-year battery life while 400 Ω rdiff ensures <±0.5 % bridge voltage deviation across operating temperature. |
Use Scenario: Clamping 5 V logic line against ESD-induced transients in industrial controller HMI interface. IC Role / Device Role / Timing Role: Low-capacitance (40 pF) shunt clamp absorbing fast-rising surges before MCU input stage. Use Value: 51 V standoff prevents false triggering during 8 kV contact discharge while 250 mW Ptot handles repetitive surge energy. |
| Low-Power ADC Reference | Backup Rail Stabilization |
Use Scenario: Generating clean 51 V reference for 16-bit SAR ADC in portable spectroscopy module. IC Role / Device Role / Timing Role: Precision voltage source feeding ADC reference input with minimal thermal drift. Use Value: +0.05 mV/K temperature coefficient limits reference error to <0.1 % over −40 to +85 °C operating range. |
Use Scenario: Maintaining 51 V auxiliary rail during main supply brownout in telecom remote radio unit. IC Role / Device Role / Timing Role: Standby regulator holding critical control circuitry active during brief AC dropout. Use Value: 50 μA test current enables immediate reactivation from deep sleep without startup delay or overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850-B51 | ±2 % tolerance (49.0–53.0 V), 300 Ω rdiff at 2 mA, 0.05 μA IR | Tighter regulation required in precision analog front-ends where 1 % output variation is unacceptable | Select when system-level calibration budget demands sub-1 % reference stability across temperature and aging |
| MMSZ5257ET1G | 51 V ±5 %, SOD-123 package (2.7 × 1.6 mm), 150 mW Ptot, 1000 Ω rdiff | Larger footprint but higher surge robustness; suited for industrial environments with frequent transients | Choose when board space permits larger package and higher non-repetitive peak power (up to 40 W) is needed for lightning immunity |
Compared with BZX8850-C51YL, BZX8850-B51 offers tighter voltage control at the cost of slightly higher unit price, while MMSZ5257ET1G trades miniaturization for greater surge handling and thermal mass-making it preferable in harsher electrical environments despite its larger size and higher dynamic impedance.
Availability
BZX8850-C51YL is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller I/O protection, and low-power ADC reference applications requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8850-C51YL 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 BZX8850 series belongs to Nexperia's low-current Zener portfolio, engineered specifically for battery-constrained systems needing stable voltage references at microampere bias currents and ultra-miniature footprints.
FAQ
What is the maximum reverse voltage the BZX8850-C51YL can withstand before breakdown?
The BZX8850-C51YL has a nominal Zener voltage of 51 V with a tolerance of ±5 %, meaning its guaranteed breakdown range is 48.0–54.0 V at IZ = 2 mA. Absolute maximum reverse voltage is not defined separately-the device is intended to operate within its specified VZ range under controlled current conditions.
Can BZX8850-C51YL be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging when paralleled. The datasheet specifies a maximum total power dissipation of 250 mW on FR4 PCB; exceeding this requires external heat sinking or alternative topology such as series resistor + TVS combination.
Is the cathode marking visible on the BZX8850-C51YL package?
Yes-the SOD882 package features a cathode marking bar on the top surface, aligned with Pin 1 as shown in Figure 9 of the datasheet. This marking is laser-etched or molded and remains visible post-reflow, enabling unambiguous orientation during automated placement.
How does the "intentional minor rise of leakage current" affect circuit performance?
Per AN90031, the controlled increase in leakage improves high-frequency noise suppression and accelerates turn-on/turn-off transitions in low-current bias networks. It does not degrade DC regulation accuracy but enhances stability in feedback loops sensitive to diode capacitance and charge injection effects.
BZX8850-C51YL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8850
- Package/Case:
- SOD-882
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 180 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 35.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006-2
BZX8850-C51YL FAQ
1.How can I place an order for BZX8850-C51YL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850-C51YL 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 BZX8850-C51YL reliable?
The price and inventory of BZX8850-C51YL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850-C51YL is usually 5 days.
3.What payment methods are accepted for BZX8850-C51YL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850-C51YL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850-C51YL?
BZX8850-C51YL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850-C51YL 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 BZX8850-C51YL?
For technical support, including BZX8850-C51YL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850-C51YL requirements.
6.How does Aetrix verify that BZX8850-C51YL is sourced from the original manufacturer or authorized distributors?
All BZX8850-C51YL 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 BZX8850-C51YL meets industry standards.
7.What is the process for return or replacement of BZX8850-C51YL?
All BZX8850-C51YL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850-C51YL, 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 BZX8850-C51YL part is unused and in its original packaging.
Return procedure for BZX8850-C51YL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850-C51YL Tags
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