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Nexperia USA Inc. BZX8850-B12YL
- Part No.:
- BZX8850-B12YL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850-B12YL.pdf
- Description:
- DIODE ZENER 12V 250MW DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:9,621
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Product details
Overview
BZX8850-B12YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 12 V nominal with ±2 % tolerance. It delivers stable reference voltage at 50 μA test current, exhibits 9.1 V forward voltage at 10 mA, and supports ≤250 mW total power dissipation on FR4 PCB. It is used in battery-powered sensor nodes requiring low-bias, low-leakage voltage clamping.
For engineers reviewing the BZX8850-B12YL datasheet, BZX8850-B12YL pinout, BZX8850-B12YL application, or BZX8850-B12YL equivalent, key selection criteria include its 12 V Zener voltage tolerance, ultra-small DFN1006-2 footprint, 150 °C junction temperature rating, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 12 V reference under low-current bias (IZ = 50 μA), with differential resistance of 150 Ω at 1 mA and temperature coefficient of +6.0 mV/K. Its cathode-anode configuration enables unidirectional voltage clamping in series-shunt regulator topologies.
The device uses silicon planar technology with intentional minor leakage current rise-per AN90031-to reduce switching transients and improve noise immunity in portable instrumentation. Thermal resistance from junction-to-ambient is 500 K/W on standard FR4 PCB, limiting continuous power handling to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.80 V to 12.20 V at IZ = 50 μA - tight ±2 % tolerance ensures accurate reference in low-power analog circuits |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables low-loss anode-side biasing in dual-rail protection schemes |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - defines maximum steady-state thermal load without heatsinking |
| Differential Resistance (rdiff) | 150 Ω max at IZ = 1 mA - determines output impedance and regulation sensitivity to load current changes |
| Reverse Current (IR) | ≤ 0.05 μA at VR = 9.1 V - ultra-low leakage preserves battery life in always-on monitoring systems |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in extended industrial environments including automotive under-hood zones |
| Package | SOD882 (DFN1006-2) - 1.0 × 0.6 × 0.5 mm leadless footprint ideal for space-constrained wearables and IoT modules |
Pinout & Package
SOD882 (DFN1006-2) is a 2-terminal, leadless ultra-small surface-mount plastic package with exposed copper pads and cathode marking bar on the top surface. Body dimensions are 1.02 mm × 0.62 mm × 0.55 mm; thermal pad area optimized for reflow soldering per IPC-7351B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker (bar) identifies this terminal on top view |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 μA - enables use in microamp-level bias networks without compromising regulation accuracy |
| Tight voltage tolerance | ±2 % (B-series) - reduces need for post-calibration trimming in factory-programmed sensor references |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - suppresses high-frequency noise in ADC reference rails and op-amp feedback paths |
| Ultra-compact packaging | DFN1006-2 footprint - saves >70 % board area versus SOD-323 while maintaining solder joint reliability |
| High-temperature capability | 150 °C max junction temperature - supports deployment in sealed enclosures with limited airflow |
Applications
| Portable Gas Sensor Calibration | Wearable ECG Front-End Reference |
|---|---|
Use Scenario: Battery-powered electrochemical gas sensor module requiring stable 12 V reference for analog signal conditioning and ADC biasing over 10-year field life. IC Role / Device Role / Timing Role: Zener voltage regulator providing precise, low-drift reference for op-amp gain stages and sensor excitation circuitry. Use Value: 50 μA test current and <0.05 μA leakage at 9.1 V minimize quiescent drain, extending coin-cell lifetime beyond 5 years. |
Use Scenario: Ultra-low-power wearable ECG patch with integrated analog front-end, operating from a 3.7 V Li-ion cell with boost converter output. IC Role / Device Role / Timing Role: Secondary voltage clamp protecting ADC input rail against transient overvoltage during electrode contact events. Use Value: Optimized leakage behavior per AN90031 reduces broadband noise coupling into high-gain biopotential amplifiers. |
| Industrial RTD Signal Conditioning | Smart Meter Auxiliary Power Rail |
Use Scenario: DIN-rail mounted temperature transmitter using 4–20 mA loop power, where local 12 V rail powers excitation current source and isolation amplifier. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing excitation voltage across platinum RTD bridge under varying loop current conditions. Use Value: ±2 % VZ tolerance and 150 Ω rdiff ensure <0.1 % full-scale error contribution in 0.1 °C resolution systems. |
Use Scenario: Revenue-grade smart electricity meter with isolated auxiliary supply derived from mains, powering metrology SoC and RF transceiver. IC Role / Device Role / Timing Role: Low-current Zener clamp regulating isolated 12 V rail feeding real-time clock and backup SRAM during brownout events. Use Value: 250 mW Ptot and 150 °C Tj rating allow reliable operation in sealed, thermally constrained meter housings up to 70 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850-C12 | ±5 % tolerance (vs. ±2 %), higher leakage (~0.1 μA at VR = 9.1 V), same package and VZ range | Acceptable where calibration is performed in-system and leakage impact is mitigated by downstream filtering | Select when cost sensitivity outweighs need for factory-trimmed reference stability |
| MMSZ4687T1G | Same 12 V nominal, ±5 % tolerance, SOD-123 package (2.7 × 1.6 mm), 500 mW Ptot, higher rdiff (200 Ω) | Requires larger PCB area but supports higher surge energy and continuous power in non-space-constrained designs | Choose when thermal margin >250 mW is required and board space permits larger footprint |
Compared with BZX8850-C12, the BZX8850-B12YL offers tighter tolerance and lower leakage for precision analog rails; versus MMSZ4687T1G, it trades power handling and package size for miniaturization and low-bias performance in portable systems.
Availability
BZX8850-B12YL is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, smart utility meters, and battery-backed IoT edge nodes requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8850-B12YL 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 delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, miniaturization, and robustness for industrial and consumer applications.
The BZX8850 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained systems needing stable voltage references at microamp bias levels.
FAQ
What is the Zener voltage tolerance for BZX8850-B12YL?
The BZX8850-B12YL has a nominal Zener voltage of 12 V with a guaranteed tolerance of ±2 %, measured at IZ = 50 μA and Tj = 25 °C. This corresponds to a minimum VZ of 11.80 V and maximum of 12.20 V, enabling high-accuracy voltage referencing without external trimming.
Can BZX8850-B12YL be used in reverse-biased avalanche mode for ESD protection?
No - BZX8850-B12YL is not characterized or rated for ESD protection. It is a precision Zener regulator optimized for stable DC voltage reference, not transient suppression. Its non-repetitive peak reverse power is 40 W only for tp = 100 μs, and it lacks specified ESD robustness (HBM/CDM) or clamping waveform data.
What is the thermal resistance and how does it affect PCB layout?
Rth(j-a) is 500 K/W when mounted on standard FR4 PCB with single-sided copper and tin plating. This means a 250 mW power dissipation raises junction temperature by 125 K above ambient. Layout must avoid thermal islands and ensure adequate copper pour around both terminals to sustain rated power at elevated temperatures.
How does the "intentional minor rise of leakage current" benefit circuit design?
Per application note AN90031, this controlled leakage improves high-frequency noise rejection and accelerates turn-off response in fast-switching analog paths. It reduces ringing in op-amp feedback loops and lowers broadband noise floor in precision ADC reference buffers - verified in Nexperia's characterization of BZX8850-Bxx devices.
BZX8850-B12YL 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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 9.1 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-B12YL FAQ
1.How can I place an order for BZX8850-B12YL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850-B12YL 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-B12YL reliable?
The price and inventory of BZX8850-B12YL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850-B12YL is usually 5 days.
3.What payment methods are accepted for BZX8850-B12YL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850-B12YL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850-B12YL?
BZX8850-B12YL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850-B12YL 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-B12YL?
For technical support, including BZX8850-B12YL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850-B12YL requirements.
6.How does Aetrix verify that BZX8850-B12YL is sourced from the original manufacturer or authorized distributors?
All BZX8850-B12YL 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-B12YL meets industry standards.
7.What is the process for return or replacement of BZX8850-B12YL?
All BZX8850-B12YL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850-B12YL, 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-B12YL part is unused and in its original packaging.
Return procedure for BZX8850-B12YL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850-B12YL Tags
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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SMAZ12-13-F
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