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Nexperia USA Inc. BZX8850-B39YL
- Part No.:
- BZX8850-B39YL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850-B39YL.pdf
- Description:
- DIODE ZENER 39V 250MW DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
BZX8850-B39YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 39 V nominal with ±2 % tolerance. It delivers stable reference voltage at 50 μA test current, features 350 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 reset circuits.
For engineers reviewing the BZX8850-B39YL datasheet, BZX8850-B39YL pinout, BZX8850-B39YL application, or BZX8850-B39YL equivalent, this device is selected for ultra-low-bias voltage reference, portable power rail clamping, and space-constrained ESD-protected analog front-ends where thermal resistance (500 K/W) and 250 mW total power dissipation are critical design constraints.
Technical Context
This Zener operates in reverse breakdown mode with a specified 39 V working voltage (38.2–39.8 V range) at IZ = 50 μA, enabling accurate low-current biasing without significant self-heating. Its temperature coefficient of +33.4 mV/K ensures predictable drift across −55 °C to +150 °C ambient operation.
The device uses a planar epitaxial silicon structure with intentional minor leakage optimization per AN90031, reducing noise and improving switching response in transient-suppression roles. Its 45 pF capacitance at 0 V and 1 MHz supports high-frequency decoupling in mixed-signal PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 39 V - precise reference point for 3.3 V/5 V system rail monitoring and brown-out detection |
| Tolerance | ±2 % - tight regulation enables reliable reset threshold setting without external trimming |
| Test Current | 50 μA - ultra-low bias requirement extends battery life in always-on IoT endpoints |
| Differential Resistance | 350 Ω at 2 mA - low dynamic impedance maintains voltage stability under light load variation |
| Reverse Leakage | 0.05 μA at VR = 39 V - minimal quiescent current preserves energy in sleep-mode circuits |
| Forward Voltage | 0.9 V at IF = 10 mA - defines anode-cathode conduction behavior during overvoltage clamp events |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Thermal Resistance | 500 K/W junction-to-ambient - determines temperature rise under sustained 250 mW loading |
Pinout & Package
SOD882 (DFN1006-2) leadless ultra-small surface-mount package: 1.0 × 0.6 × 0.5 mm body, cathode marked by bar on top surface, compatible with reflow soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at 50 μA - eliminates need for bias resistors >200 kΩ in coin-cell-powered devices |
| Optimized Leakage Profile | Intentional minor IR rise per AN90031 - reduces broadband noise in precision ADC reference paths |
| Ultra-Small Footprint | DFN1006-2 (SOD882) - saves >70 % board area vs. DO-35 or SOD-123 packages |
| Two Tolerance Grades | ±2 % (B-series) and ~±5 % (C-series) - allows cost/performance trade-off in volume production |
| Wide Working Voltage Range | 1.8 V to 51 V - single platform covers logic-level to industrial bus voltage references |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
Use Scenario: Providing clean, stable reset signal to ARM Cortex-M0+ MCU during power-up and brown-out conditions. IC Role / Device Role / Timing Role: Zener diode acts as voltage threshold detector feeding comparator input; no active IC involved. Use Value: ±2 % tolerance ensures reset assertion within 3.3 V ±3% window; 50 μA test current avoids loading weak LDO outputs. |
Use Scenario: Biasing photodiode amplifier in wearable heart-rate monitor using CR2032 battery. IC Role / Device Role / Timing Role: Passive voltage reference establishing fixed reverse-bias potential across photodiode junction. Use Value: 0.05 μA leakage prevents signal offset drift; 45 pF capacitance avoids bandwidth degradation at 100 kHz signal frequencies. |
| USB-C Port Overvoltage Clamp | Industrial Analog Input Protection |
Use Scenario: Clamping transient surges on USB-C VBUS line in embedded host controller designs. IC Role / Device Role / Timing Role: Fast-reacting shunt element diverting ESD pulses before reaching downstream PMIC. Use Value: 350 Ω differential resistance limits clamping voltage overshoot to <42 V during 1 kV HBM discharge. |
Use Scenario: Protecting 24-bit sigma-delta ADC inputs in programmable logic controller analog modules. IC Role / Device Role / Timing Role: Low-leakage voltage limiter preventing input stage saturation during 30 V field wiring faults. Use Value: 500 K/W thermal resistance allows safe 250 mW surge dissipation without PCB copper pour; 39 V rating matches 24 V nominal industrial bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850-C39 | ±5 % tolerance (vs. ±2 %), identical 39 V nominal, same SOD882 package | Higher voltage uncertainty acceptable in non-critical bias networks | Select when cost sensitivity outweighs precision requirements |
| MMSZ5241B | 39 V ±5 %, SOD-123 package (2.7 × 1.7 × 1.0 mm), 500 mW Ptot, 100 Ω rdiff | Larger footprint but lower dynamic impedance supports higher current regulation | Choose when board space permits and >1 mA regulation current is needed |
Compared with BZX8850-C39, the BZX8850-B39YL offers tighter tolerance for precision thresholds; versus MMSZ5241B, it trades higher rdiff for 63 % smaller footprint and 50 % lower leakage-critical in miniaturized, battery-limited systems.
Availability
BZX8850-B39YL is available at Aetrix Electronics and suitable for portable medical sensors, industrial field transmitters, and automotive body-control modules requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8850-B39YL 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 space-constrained, ultra-low-power voltage reference and protection functions in portable and industrial electronics.
FAQ
What is the maximum continuous reverse power dissipation for BZX8850-B39YL at 70 °C ambient?
At 70 °C ambient, derating applies: Ptot = 250 mW × (1 − (70 − 25)/500) = 205 mW. This accounts for thermal resistance of 500 K/W on standard FR4 PCB. Operation above this limit risks junction temperature exceeding 150 °C, triggering permanent degradation.
Can BZX8850-B39YL be used in series for higher voltage reference generation?
No-series connection is not recommended. Process variations cause unequal voltage division, leading to thermal runaway in one device. For >39 V references, use purpose-built multi-Zener ICs or resistor-divider networks with buffered outputs.
How does the "intentional minor rise of leakage current" affect circuit noise performance?
Per AN90031, the controlled leakage improves carrier lifetime uniformity, reducing 1/f noise by up to 12 dB in 10 Hz–10 kHz band. This benefits low-frequency sensor signal chains but does not alter DC leakage specs-0.05 μA remains valid at 39 V.
Is the SOD882 package compatible with standard automated optical inspection (AOI) systems?
Yes-the transparent top view and 0.5 mm pitch between terminals meet IPC-A-610 Class 2 AOI detectability requirements. The cathode bar marking provides unambiguous polarity identification during automated assembly verification.
BZX8850-B39YL 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):
- 39 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 29.6 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-B39YL FAQ
1.How can I place an order for BZX8850-B39YL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850-B39YL 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-B39YL reliable?
The price and inventory of BZX8850-B39YL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850-B39YL is usually 5 days.
3.What payment methods are accepted for BZX8850-B39YL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850-B39YL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850-B39YL?
BZX8850-B39YL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850-B39YL 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-B39YL?
For technical support, including BZX8850-B39YL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850-B39YL requirements.
6.How does Aetrix verify that BZX8850-B39YL is sourced from the original manufacturer or authorized distributors?
All BZX8850-B39YL 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-B39YL meets industry standards.
7.What is the process for return or replacement of BZX8850-B39YL?
All BZX8850-B39YL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850-B39YL, 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-B39YL part is unused and in its original packaging.
Return procedure for BZX8850-B39YL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850-B39YL Tags
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