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Nexperia USA Inc. BZX8850-B20YL
- Part No.:
- BZX8850-B20YL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850-B20YL.pdf
- Description:
- DIODE ZENER 20V 250MW DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:7,902
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Product details
Overview
BZX8850-B20YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 20 V nominal with ±2 % tolerance. It delivers stable reference voltage at 50 µA test current, features 225 Ω differential resistance at 5 mA, and operates within −55 °C to +150 °C ambient range-ideal for battery-powered sensor biasing and low-power analog signal conditioning.
For engineers reviewing the BZX8850-B20YL datasheet, BZX8850-B20YL pinout, BZX8850-B20YL application, or BZX8850-B20YL equivalent, this page provides verified Zener voltage, thermal resistance, leakage behavior, and SOD882 footprint compatibility for compact PCB designs requiring stable sub-1 mA regulation.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 20 V at IZ = 50 µA, exhibiting a temperature coefficient of +14.4 mV/K and differential resistance of 225 Ω at 5 mA. Its low test current enables minimal quiescent power draw in always-on circuits.
The device uses silicon planar epitaxial construction with cathode-anode terminal configuration in a leadless DFN1006-2 package. Thermal resistance from junction to ambient is 500 K/W on FR4 PCB, supporting operation up to 150 °C junction temperature under defined mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage VZ | 19.6 V to 20.4 V at IZ = 50 µA - ensures tight 20 V reference for low-bias analog stages |
| Differential resistance rdiff | 225 Ω at IZ = 5 mA - defines output impedance affecting regulation stability under load variation |
| Forward voltage VF | ≤ 0.9 V at IF = 10 mA - enables use as clamp or protection diode in dual-role circuits |
| Total power dissipation Ptot | 250 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 layout |
| Reverse current IR | ≤ 0.05 µA at VR = 15.2 V - confirms low leakage below knee voltage for standby integrity |
| Thermal resistance Rth(j-a) | 500 K/W - determines junction temperature rise per watt on single-sided copper PCB |
| Package | SOD882 (DFN1006-2), 1.0 × 0.6 × 0.5 mm - supports 0201-class board space constraints and reflow compatibility |
Pinout & Package
SOD882 (DFN1006-2) is a leadless, surface-mount plastic package with two terminals and a cathode marking bar on the top surface. Dimensions: 1.02 mm × 0.62 mm × 0.50 mm; solder pad footprint per Figure 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker aligns with PCB silkscreen bar |
| 2 | Anode (A) | Connected to ground or lower potential; forms reverse-biased junction for Zener action |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby current in battery-critical systems without sacrificing voltage accuracy |
| Tight voltage tolerance | ±2 % for B-series - enables direct replacement in precision reference paths without recalibration |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves switching transient response and reduces noise coupling |
| Ultra-small footprint | DFN1006-2 (0201 metric) - saves >50 % board area vs. SOD-123 while maintaining thermal performance |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in wearable health monitors. IC Role / Device Role / Timing Role: Zener voltage regulator supplying 20 V bias to sensor bridge circuitry. Use Value: Maintains <±0.4 V drift over −20 °C to +70 °C ambient, ensuring consistent sensor gain calibration across operating range. |
Use Scenario: Generating precise reference voltage for 12-bit SAR ADC in IoT edge node. IC Role / Device Role / Timing Role: Low-noise Zener reference source replacing larger shunt regulators. Use Value: Delivers 20 V ±0.4 V at 50 µA, enabling full-scale ADC resolution without external buffering or trimming. |
| USB-C Power Negotiation Clamp | RTC Backup Voltage Stabilizer |
Use Scenario: Clamping CC line voltage during USB PD communication handshake. IC Role / Device Role / Timing Role: Reverse-biased Zener limiting CC pin voltage to 20 V during fault transients. Use Value: Withstands 40 W non-repetitive surge (100 µs) while holding clamp level within ±2 %, protecting Type-C controller IO. |
Use Scenario: Stabilizing backup supply for real-time clock IC during main power brownout. IC Role / Device Role / Timing Role: Low-leakage Zener regulating coin-cell-supplied RTC VBACKUP. Use Value: Draws only 0.05 µA at 15.2 V reverse bias, extending CR2032 life beyond 5 years in always-on backup mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850-C20 | ±5 % tolerance, higher leakage (0.05 µA vs. B20YL's 0.05 µA at same VR), identical package and VZ min/max | Acceptable where cost sensitivity outweighs precision; not suitable for <12-bit reference paths | Select when budget constraints dominate and ±5 % regulation error is acceptable in system-level tolerance stack-up |
| MMSZ5248B | SOD-123 package (2.7 × 1.6 mm), 20 V ±5 %, 500 mW Ptot, rdiff = 23 Ω - significantly larger size and lower impedance | Used in legacy designs with larger footprints; better for higher-current regulation but incompatible with ultra-dense layouts | Choose only if board redesign is impractical and thermal margin exceeds 250 mW requirement |
Compared with BZX8850-C20 and MMSZ5248B, the BZX8850-B20YL uniquely combines ±2 % tolerance, DFN1006-2 footprint, and 50 µA test current-enabling high-precision, space-constrained, ultra-low-power regulation unattainable with either alternative.
Availability
BZX8850-B20YL is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, and USB-C power negotiation clamp applications requiring stable component supply across industrial and consumer production cycles.
Supply support for BZX8850-B20YL 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, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX8850 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for space-constrained, battery-sensitive applications demanding stable voltage references at microampere bias levels.
FAQ
What is the maximum continuous power dissipation for BZX8850-B20YL?
The BZX8850-B20YL has a total power dissipation limit of 250 mW at ambient temperatures ≤25 °C when mounted on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 2.0 mW/°C based on its 500 K/W thermal resistance.
Does BZX8850-B20YL support bidirectional ESD protection?
No. The BZX8850-B20YL is a unidirectional Zener diode optimized for reverse-bias voltage regulation. Its forward voltage is ≤0.9 V at 10 mA, but it lacks symmetric clamping characteristics or specified ESD ratings-dedicated TVS devices like PESD5V0S1BA should be used for bidirectional protection.
How does the BZX8850-B20YL differ from the C-series variant?
The BZX8850-B20YL offers ±2 % Zener voltage tolerance and is specified at 50 µA test current, whereas the C-series (e.g., BZX8850-C20) provides ±5 % tolerance and shares the same nominal voltage range. Both use identical SOD882 packaging and thermal characteristics, but the B-series enables tighter system-level voltage accuracy.
Can BZX8850-B20YL be used in place of a 20 V TL431 shunt regulator?
No. The BZX8850-B20YL is a passive two-terminal Zener diode without internal amplification or adjustable feedback. It cannot replicate the TL431's 2.5 V reference, programmable output, or 100 mA sink capability. It serves only as a fixed-voltage shunt element, not an active voltage reference IC.
BZX8850-B20YL 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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006-2
BZX8850-B20YL FAQ
1.How can I place an order for BZX8850-B20YL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850-B20YL 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-B20YL reliable?
The price and inventory of BZX8850-B20YL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850-B20YL is usually 5 days.
3.What payment methods are accepted for BZX8850-B20YL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850-B20YL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850-B20YL?
BZX8850-B20YL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850-B20YL 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-B20YL?
For technical support, including BZX8850-B20YL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850-B20YL requirements.
6.How does Aetrix verify that BZX8850-B20YL is sourced from the original manufacturer or authorized distributors?
All BZX8850-B20YL 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-B20YL meets industry standards.
7.What is the process for return or replacement of BZX8850-B20YL?
All BZX8850-B20YL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850-B20YL, 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-B20YL part is unused and in its original packaging.
Return procedure for BZX8850-B20YL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850-B20YL Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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