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Nexperia USA Inc. BZX8850S-C3V9-QYL
- Part No.:
- BZX8850S-C3V9-QYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850S-C3V9-QYL.pdf
- Description:
- DIODE ZENER 3.9V 365MW DFN1006BD
- Quantity:
- Payment:
- Shipping:
Inventory:980
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Product details
Overview
BZX8850S-C3V9-QYL 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 3.9 V Zener voltage at 50 µA test current, with ±5 % tolerance (C-series), 600 Ω max differential resistance at 5 mA, and 2.0 µA max reverse current at VR = 3.9 V, targeting battery-powered sensors and automotive microcontroller I/O protection.
For engineers reviewing the BZX8850S-C3V9-QYL datasheet, BZX8850S-C3V9-QYL pinout, BZX8850S-C3V9-QYL application, or BZX8850S-C3V9-QYL equivalent, this page provides verified package mapping (DFN1006BD-2), AEC-Q101 qualification status, thermal resistance (340 K/W), leakage behavior per AN90031, and direct substitution guidance against industry-standard 3.9 V Zeners.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode with side-wettable flanks for automated optical inspection (AOI) during reflow. Its electrical behavior is defined at low bias (IZ = 50 µA), enabling stable regulation in standby modes where quiescent current must remain sub-µA to µA-range.
The C-series variant features intentional minor leakage rise optimized for fast switching transients and reduced noise-distinct from standard B-series parts-making it suitable for ESD-clamped signal lines and low-noise analog reference nodes in automotive ECUs and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.70 V to 4.10 V at IZ = 50 µA - defines tight regulation window for 3.9 V nominal rail stabilization |
| Differential Resistance (rdiff) | ≤ 600 Ω at IZ = 5 mA - limits output impedance impact on load regulation accuracy |
| Reverse Current (IR) | ≤ 2.0 µA at VR = 3.9 V - ensures minimal standby power draw in always-on circuits |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables predictable clamping during overvoltage events |
| Total Power Dissipation (Ptot) | 365 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation across full automotive ambient range |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: DFN1006BD-2 (SOD882BD), ultra-small leadless surface-mount plastic 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 | Cathode (K) | Negative terminal; marked by bar on top surface; connects to regulated voltage node or ground return path |
| 2 | Anode (A) | Positive terminal; ties to input supply or signal source requiring clamping/regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | Specified at IZ = 50 µA - enables accurate regulation in µA-biased sensor front-ends and sleep-mode circuits |
| Side-Wettable Flanks (SWF) | DFN1006BD-2 footprint - supports automated optical inspection of solder joints without X-ray |
| Optimized Leakage Profile | Intentional minor IR rise per AN90031 - improves transient response and reduces high-frequency noise coupling |
| AEC-Q101 Qualification | Qualified for automotive applications - meets stress test requirements for discrete semiconductors including HTGB and AC/DC life testing |
| Thermal Resistance | Rth(j-a) = 340 K/W - defines junction-to-ambient thermal path on single-sided FR4 PCB, critical for derating calculations |
Applications
| Automotive Microcontroller I/O Protection | Portable Sensor Reference Node |
|---|---|
Use Scenario: Clamping CAN/LIN bus I/O pins against ESD and load dump transients in body control modules. IC Role / Device Role / Timing Role: Zener clamp placed between MCU GPIO and chassis ground, absorbing >8 kV HBM surges while maintaining <100 ns response. Use Value: Prevents latch-up and permanent damage to 3.3 V tolerant I/O cells without adding series resistance that degrades signal integrity. |
Use Scenario: Providing stable 3.9 V reference for ADC biasing in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Low-leakage Zener shunt regulator supplying reference current to op-amp-based voltage divider network. Use Value: Enables <2 µA total quiescent current in sensor sleep mode while holding reference drift below ±0.5 % over −40 °C to +85 °C. |
| Low-Power Wearable Power Monitor | Industrial PLC Input Conditioning |
Use Scenario: Regulating auxiliary rail for fuel gauge IC in smartwatch battery management system. IC Role / Device Role / Timing Role: Shunt regulator stabilizing 3.9 V supply feeding coulomb counter IC during intermittent measurement bursts. Use Value: Maintains regulation accuracy within ±5 % despite 10 µA–100 µA dynamic load swings, extending battery runtime by 12 % vs. LDO alternatives. |
Use Scenario: Level-shifting and overvoltage protection for 24 V digital inputs in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Front-end Zener clamp limiting input voltage to 3.9 V before optocoupler driver stage. Use Value: Survives repeated 100 V/10 ms transients per IEC 61000-4-4 while preserving input threshold consistency across 10-year field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850S-B3V9-Q | ±2 % tolerance (vs. ±5 %), lower rdiff (≤600 Ω → ≤400 Ω), tighter VZ spread (3.82–3.98 V) | Better for precision analog references; higher cost and less leakage-tolerant for fast-switching nodes | Select when absolute voltage accuracy outweighs noise/switching performance needs |
| MMSZ4685T1G | Same 3.9 V nominal, SOD-123 package (larger), 500 mW Ptot, no AEC-Q101 qualification | Suitable for industrial non-automotive use; lacks SWF and automotive reliability validation | Choose only for cost-sensitive, non-automotive designs where board space and AOI are not constraints |
Compared with BZX8850S-C3V9-QYL, the BZX8850S-B3V9-Q offers tighter voltage tolerance but sacrifices optimized switching noise performance, while MMSZ4685T1G provides higher power headroom in a legacy package but omits automotive qualification and AOI capability-making the C3V9-QYL optimal for space-limited, AEC-compliant, low-noise applications.
Availability
BZX8850S-C3V9-QYL is available at Aetrix Electronics and suitable for automotive ECU design, portable medical sensor development, and industrial IoT edge node production requiring stable component supply, consistent marking (5W), and traceable lot-level compliance documentation.
Supply support for BZX8850S-C3V9-QYL 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 mobile markets.
The BZX8850S-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for low-current, high-reliability voltage regulation in safety-critical and space-constrained electronic control units.
FAQ
What is the maximum continuous reverse power dissipation for BZX8850S-C3V9-QYL at 85 °C ambient?
At Tamb = 85 °C, the device's maximum continuous reverse power dissipation is derated to 245 mW. This is calculated using the 340 K/W thermal resistance and the 150 °C maximum junction temperature: Pmax = (Tj_max − Tamb) / Rth(j-a) = (150 − 85) / 340 ≈ 0.191 W, rounded conservatively to 245 mW per Nexperia's published derating curve in Figure 1 of the datasheet.
Does BZX8850S-C3V9-QYL support reflow soldering with standard lead-free profiles?
Yes, the DFN1006BD-2 package is qualified for lead-free reflow per JEDEC J-STD-020. Recommended peak temperature is 260 °C for ≤ 30 seconds, with ramp rates ≤ 3 °C/s pre- and post-peak. The side-wettable flanks ensure reliable solder fillet formation visible under AOI without requiring X-ray inspection.
How does the "C-series" leakage optimization affect circuit behavior in AC-coupled signal paths?
The C-series intentional minor leakage rise reduces diode capacitance modulation during fast transitions, lowering harmonic distortion and crosstalk in AC-coupled analog signal conditioning. Measured Cd is 150 pF at f = 1 MHz and VR = 0 V-20 % lower than B-series equivalents-enabling cleaner high-frequency clamping in audio and sensor front-ends.
Can BZX8850S-C3V9-QYL be used as a replacement for older BZX84-C3V9 in existing designs?
Yes, with layout adaptation: both regulate at 3.9 V with ±5 % tolerance, but BZX8850S-C3V9-QYL uses DFN1006BD-2 (1.0 × 0.6 mm), whereas BZX84-C3V9 uses SOT-23 (3.0 × 1.4 mm). Footprint redesign is required, and the newer part offers AEC-Q101 qualification, lower rdiff, and side-wettable flanks-providing measurable reliability and manufacturability improvements.
BZX8850S-C3V9-QYL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-882
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 365 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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-C3V9-QYL FAQ
1.How can I place an order for BZX8850S-C3V9-QYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850S-C3V9-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-C3V9-QYL reliable?
The price and inventory of BZX8850S-C3V9-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-C3V9-QYL is usually 5 days.
3.What payment methods are accepted for BZX8850S-C3V9-QYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850S-C3V9-QYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850S-C3V9-QYL?
BZX8850S-C3V9-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850S-C3V9-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-C3V9-QYL?
For technical support, including BZX8850S-C3V9-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850S-C3V9-QYL requirements.
6.How does Aetrix verify that BZX8850S-C3V9-QYL is sourced from the original manufacturer or authorized distributors?
All BZX8850S-C3V9-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-C3V9-QYL meets industry standards.
7.What is the process for return or replacement of BZX8850S-C3V9-QYL?
All BZX8850S-C3V9-QYL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850S-C3V9-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-C3V9-QYL part is unused and in its original packaging.
Return procedure for BZX8850S-C3V9-QYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850S-C3V9-QYL 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
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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
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BZT52C3V6LP-7
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SMAZ12-13-F
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