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Nexperia USA Inc. BZX8850S-C51-QYL
- Part No.:
- BZX8850S-C51-QYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850S-C51-QYL.pdf
- Description:
- DIODE ZENER 51V 365MW DFN1006BD
- Quantity:
- Payment:
- Shipping:
Inventory:9,440
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Product details
Overview
BZX8850S-C51-Q from Nexperia is a low-current Zener voltage regulator diode in the BZX8850S-Q series, designed for precision voltage reference and regulation in space-constrained, low-power circuits. It delivers a nominal 51 V Zener voltage (48.0–54.0 V at IZ = 2 mA), ±2 % tolerance (C-series), 400 Ω differential resistance, and operates at ultra-low test current (50 µA), making it ideal for battery-powered sensor nodes and automotive ECU standby rails.
For engineers reviewing the BZX8850S-C51-Q datasheet, BZX8850S-C51-Q pinout, BZX8850S-C51-Q application, or BZX8850S-C51-Q equivalent, key selection criteria include its AEC-Q101 qualification, side-wettable DFN1006BD-2 (SOD882BD) package for automated optical inspection, 365 mW power rating at 25 °C, and intentional leakage optimization for fast switching and noise reduction per AN90031.
Technical Context
This device functions as a two-terminal shunt voltage regulator with reverse-biased operation, where regulation occurs across the cathode-to-anode junction. Its Zener breakdown mechanism is optimized for stable 51 V reference generation under low bias conditions (IZ = 50 µA), with temperature coefficient of +0.05 mV/K and diode capacitance of 40 pF at 0 V.
The BZX8850S-C51-Q features intentional minor leakage current rise-distinct from standard Zeners-to reduce switching transients and high-frequency noise in feedback paths. It is qualified to AEC-Q101, supporting operation from −55 °C to +150 °C ambient, with thermal resistance Rth(j-a) = 340 K/W on FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 48.0–54.0 V at IZ = 2 mA; defines precise regulation point for 51 V nominal rail stabilization |
| Tolerance | ±2 % (C-series); enables tight voltage margin control in safety-critical automotive subsystems |
| Differential Resistance rdiff | 400 Ω max at IZ = 2 mA; determines load regulation error under varying current draw |
| Test Current IZ | 50 µA (specification point); allows operation in ultra-low-power modes without compromising regulation accuracy |
| Power Dissipation Ptot | 365 mW at Tamb ≤ 25 °C; sets maximum continuous thermal budget on standard FR4 PCB |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA; ensures minimal conduction loss during forward-bias fault conditions |
| Reverse Current IR | ≤ 0.05 µA at VR = 39 V; guarantees negligible standby current in high-impedance reference paths |
Pinout & Package
Package: DFN1006BD-2 (SOD882BD), ultra-small leadless surface-mount package measuring 1.0 mm × 0.6 mm × 0.47 mm with side-wettable flanks for solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage node; marking bar on top surface identifies this terminal |
| 2 (A) | Anode | Connected to ground or lower-potential reference; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Side-wettable flanks (SWF) | Enables automated optical inspection (AOI) of solder joints on DFN package without X-ray |
| Optimized leakage profile | Intentional minor IR rise improves transient response and reduces broadband noise per AN90031 |
| Low IZ specification | 50 µA test current supports energy harvesting and coin-cell-powered designs |
| High temp operation | Junction temperature up to 150 °C supports under-hood and powertrain environments |
Applications
| Automotive ECU Standby Rail | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Maintaining stable 51 V reference for microcontroller reset supervision and CAN transceiver biasing during vehicle ignition-off state. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise threshold for undervoltage lockout (UVLO) circuitry. Use Value: ±2 % tolerance and AEC-Q101 qualification ensure reliable wake-up detection across temperature and lifetime. |
Use Scenario: Biasing high-impedance op-amp inputs in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Low-leakage Zener reference establishing fixed common-mode voltage for analog front-end. Use Value: 50 µA test current and 0.05 µA reverse current minimize loading on micro-power supply rails. |
| Portable Medical Diagnostic Device | Smart Building Energy Metering |
|
Use Scenario: Providing isolated 51 V reference for ADC reference buffer in handheld ultrasound probe battery management. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing reference voltage for 16-bit SAR ADC conversion. Use Value: 400 Ω rdiff and +0.05 mV/K TC ensure <0.1 % full-scale drift over 0–70 °C operating range. |
Use Scenario: Regulating auxiliary 51 V rail for PLC I/O isolation barrier and RS-485 transceiver bias in DIN-rail mounted meters. IC Role / Device Role / Timing Role: Low-power voltage clamp protecting isolated DC-DC converter feedback network. Use Value: Side-wettable flanks enable AOI verification in high-reliability industrial assembly lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850S-B51-Q | ±5 % tolerance (B-series), same 48–54 V range but looser accuracy; 400 Ω rdiff, identical package | Suitable for non-critical biasing where cost sensitivity outweighs regulation precision | Select when ±5 % tolerance meets system UVLO hysteresis requirements and AEC-Q101 compliance is retained |
| MMSZ5267ET1G | 51 V nominal, ±5 %, SOD-123 package (2.7 × 1.6 mm), 500 mW Ptot, 1000 Ω rdiff, no AEC-Q101 | Larger footprint, higher power, but lacks automotive qualification and SWF capability | Choose only for non-automotive prototypes requiring higher dissipation and legacy footprint compatibility |
Compared with BZX8850S-C51-Q, the BZX8850S-B51-Q trades accuracy for cost in identical automotive-grade packaging, while MMSZ5267ET1G offers higher power in a non-qualified, larger package-neither matches the combination of ±2 %, SWF, and AEC-Q101 in 1.0 × 0.6 mm.
Availability
BZX8850S-C51-Q is available at Aetrix Electronics and suitable for automotive ECU design, portable medical instrumentation, industrial sensor signal conditioning, and smart building energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8850S-C51-Q 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX8850S-Q series belongs to Nexperia's automotive-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage reference in space-constrained, thermally demanding environments.
FAQ
What is the maximum reverse voltage the BZX8850S-C51-Q can withstand before breakdown?
The BZX8850S-C51-Q has a nominal Zener voltage of 51 V, with guaranteed breakdown occurring between 48.0 V and 54.0 V at IZ = 2 mA. Its absolute maximum non-repetitive peak reverse voltage is not specified independently, but the non-repetitive peak reverse power dissipation is rated at 40 W for 100 µs pulses-limiting practical surge voltage based on pulse duration and current path impedance.
Does the BZX8850S-C51-Q require a series resistor in all applications?
Yes-a current-limiting resistor is mandatory to set the operating Zener current within safe limits. For example, at 51 V regulation and 50 µA test current, a 100 kΩ resistor is typical for 10 V overhead; exceeding 365 mW total power dissipation (e.g., >7.2 mA at 51 V) risks thermal failure. The resistor value must be calculated using VIN − VZ and desired IZ.
How does the "intentional minor rise of leakage current" affect circuit performance?
This controlled increase in reverse leakage (per AN90031) reduces junction capacitance transients during turn-on/turn-off, lowering high-frequency noise coupling into sensitive analog nodes. It does not degrade DC regulation accuracy-VZ remains tightly specified-but improves stability in fast-switching feedback loops like those in DC-DC converter references.
Can the BZX8850S-C51-Q be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients and manufacturing variations that cause current hogging when paralleled. Even matched units will not share current evenly due to rdiff mismatch (400 Ω max) and thermal runaway risk. For higher power, use a single higher-rated device or an active shunt regulator topology.
BZX8850S-C51-QYL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-882
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 365 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006BD-2
BZX8850S-C51-QYL FAQ
1.How can I place an order for BZX8850S-C51-QYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850S-C51-QYL 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 BZX8850S-C51-QYL reliable?
The price and inventory of BZX8850S-C51-QYL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850S-C51-QYL is usually 5 days.
3.What payment methods are accepted for BZX8850S-C51-QYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850S-C51-QYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850S-C51-QYL?
BZX8850S-C51-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850S-C51-QYL 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 BZX8850S-C51-QYL?
For technical support, including BZX8850S-C51-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850S-C51-QYL requirements.
6.How does Aetrix verify that BZX8850S-C51-QYL is sourced from the original manufacturer or authorized distributors?
All BZX8850S-C51-QYL 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 BZX8850S-C51-QYL meets industry standards.
7.What is the process for return or replacement of BZX8850S-C51-QYL?
All BZX8850S-C51-QYL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850S-C51-QYL, 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 BZX8850S-C51-QYL part is unused and in its original packaging.
Return procedure for BZX8850S-C51-QYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850S-C51-QYL Tags
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MMBZ5240B-7-F
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MMSZ5231B-7-F
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