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Nexperia USA Inc. BZX8850S-B3V9-QYL
- Part No.:
- BZX8850S-B3V9-QYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850S-B3V9-QYL.pdf
- Description:
- DIODE ZENER 3.9V 365MW DFN1006BD
- Quantity:
- Payment:
- Shipping:
Inventory:2,189
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Product details
Overview
BZX8850S-B3V9-QYL from Nexperia is a low-current Zener voltage regulator diode in the BZX8850S-Q series, designed for precision voltage reference and low-power biasing in space-constrained circuits. It delivers a nominal 3.9 V regulation at 50 µA test current, with ±2 % tolerance (B-series), 365 mW total power dissipation, and ultra-small DFN1006BD-2 (SOD882BD) package - ideal for battery-powered wearables and automotive sensor signal conditioning.
For engineers reviewing the BZX8850S-B3V9-QYL datasheet, BZX8850S-B3V9-QYL pinout, BZX8850S-B3V9-QYL application, or BZX8850S-B3V9-QYL equivalent, this page provides verified electrical characteristics, AEC-Q101 qualification status, thermal resistance (340 K/W), reverse leakage behavior at VR = 3.0 V, and side-wettable flank soldering compatibility for automated optical inspection (AOI).
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 3.82 V to 3.98 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.7 mV/K and differential resistance ≤ 95 Ω at IZ = 5 mA. Its low 50 µA test current enables stable regulation in micro-power circuits where quiescent current must remain below 100 µA.
The device features intentional minor leakage current optimization per AN90031 for fast switching transients and reduced noise in analog front-ends. Qualified to AEC-Q101, it supports junction temperatures up to 150 °C and ambient operation from −55 °C to +150 °C - meeting requirements for under-hood automotive modules and industrial IoT edge nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.9 V at IZ = 50 µA - defines precise low-current reference point for bias networks |
| Voltage Tolerance | ±2 % (B-series) - ensures tight regulation across production lots without trimming |
| Max Power Dissipation | 365 mW at Tamb ≤ 25 °C - sets absolute upper limit for continuous DC power handling on FR4 PCB |
| Differential Resistance | ≤ 95 Ω at IZ = 5 mA - determines output impedance and load regulation error under dynamic current draw |
| Reverse Leakage Current | ≤ 2.0 µA at VR = 3.0 V - critical for minimizing standby power in always-on sensor interfaces |
| Junction-to-Ambient Rth | 340 K/W - quantifies thermal bottleneck for derating above 25 °C ambient |
| Package | DFN1006BD-2 (SOD882BD), 1.0 mm × 0.6 mm × 0.47 mm - enables <1 mm² board area usage with side-wettable flanks for AOI |
Pinout & Package
DFN1006BD-2 (SOD882BD) is a leadless, surface-mount plastic package with side-wettable flanks, measuring 1.0 mm × 0.6 mm × 0.47 mm and featuring a 0.65 mm pitch. The cathode is marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive terminal requiring correct PCB footprint orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current regulation | Specified at IZ = 50 µA - enables stable reference generation in sub-100 µA supply rails |
| AEC-Q101 qualification | Qualified for automotive applications - guarantees reliability under temperature cycling, humidity, and mechanical stress per discrete semiconductor standard |
| Side-wettable flanks | DFN1006BD-2 package geometry - supports automated optical inspection (AOI) of solder joint quality in high-volume SMT lines |
| Optimized leakage profile | Intentional minor IR increase per AN90031 - reduces switching noise and improves transient response in analog signal paths |
| Ultra-small footprint | 1.0 mm × 0.6 mm body - saves PCB area in dense portable electronics without sacrificing thermal performance |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
|
Use Scenario: Voltage reference for MEMS pressure sensor signal conditioning in HVAC control modules. IC Role / Device Role / Timing Role: Zener diode providing stable 3.9 V bias to op-amp input stage and ADC reference divider. Use Value: ±2 % tolerance and −2.7 mV/K TC ensure <±10 mV drift over −40 °C to +125 °C, meeting ASIL-B functional safety margin. |
Use Scenario: Low-power voltage reference in wearable ECG front-end during battery-operated standby mode. IC Role / Device Role / Timing Role: Regulator diode establishing precision bias for instrumentation amplifier with <1 µA quiescent draw. Use Value: 50 µA test current and 2.0 µA leakage at 3.0 V enable >7-day battery life in 200 mAh coin-cell systems. |
| Industrial IoT Edge Nodes | Smart Home Motion Detectors |
|
Use Scenario: Reference source for thermistor-based temperature sensing in wireless gateway environmental monitors. IC Role / Device Role / Timing Role: Zener element stabilizing excitation voltage for 10 kΩ NTC network feeding 12-bit SAR ADC. Use Value: 95 Ω dynamic resistance minimizes measurement error from current variation across 5–15 µA sensor bias range. |
Use Scenario: Voltage clamp for PIR sensor output stage in battery-powered occupancy detectors. IC Role / Device Role / Timing Role: Transient-suppressing Zener protecting comparator input against ESD-induced overshoot. Use Value: 365 mW power rating and 340 K/W Rth(j-a) allow safe clamping of 100 µs/10 V transients without thermal runaway. |
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-C3V9-Q | ±5 % tolerance (C-series), higher max leakage (2.5 µA at VR = 3.0 V), same package and thermal specs | Acceptable where cost sensitivity outweighs precision; less suitable for ASIL-B or medical-grade calibration | Select when budget constraints dominate and ±5 % regulation accuracy suffices for non-critical biasing |
| MMSZ4685T1G | 3.9 V, ±5 %, SOD-123 package (2.7 mm × 1.6 mm), 500 mW Ptot, Rth(j-a) = 300 K/W | Larger footprint but higher power headroom; lacks AEC-Q101 qualification and side-wettable flanks | Choose only if board space permits larger package and automotive qualification is not required |
Compared with BZX8850S-B3V9-QYL, the C3V9 variant trades precision for cost in non-safety-critical roles, while MMSZ4685T1G offers higher power margin at the expense of size, qualification, and manufacturability - making the B-series QYL grade optimal for space- and reliability-constrained automotive and portable designs.
Availability
BZX8850S-B3V9-QYL is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, and industrial IoT edge nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX8850S-B3V9-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 high-volume, high-reliability logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components and advanced packaging.
The BZX8850S-Q series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for precision voltage reference in space-constrained, low-power, and automotive-grade applications - emphasizing AEC-Q101 compliance, side-wettable flanks, and micro-current operation.
FAQ
What is the maximum reverse voltage (VR) this diode can withstand before breakdown?
The BZX8850S-B3V9-QYL is rated for a nominal Zener voltage of 3.9 V at 50 µA, with guaranteed breakdown occurring between 3.82 V and 3.98 V. It is not designed to block voltages significantly above this range - applying >4.5 V continuously risks exceeding its 365 mW power limit and causing thermal failure. Absolute maximum reverse voltage is not defined; operation must stay within the specified Zener region.
Does this part support reflow soldering with standard lead-free profiles?
Yes - the DFN1006BD-2 package is qualified for lead-free reflow soldering per JEDEC J-STD-020. Nexperia provides a dedicated footprint (Fig. 10) with 0.7 mm solder lands and 0.4 mm solder paste stencil openings. Peak temperature must not exceed 260 °C for ≤ 30 seconds, and ramp rates must comply with IPC/JEDEC J-STD-020D to prevent delamination or voiding.
How does the "B" vs "C" suffix affect selection beyond tolerance?
The "B" suffix denotes ±2 % tolerance and optimized low-leakage performance (≤2.0 µA at VR = 3.0 V), while "C" indicates ±5 % tolerance and slightly elevated leakage (≤2.5 µA). Both share identical package, thermal resistance, and AEC-Q101 qualification - but only B-series meets tighter regulation needs for precision analog biasing and safety-critical automotive subsystems.
Can this Zener be used in series or parallel configurations for higher voltage or current?
No - the BZX8850S-B3V9-QYL is not characterized for series or parallel operation. Its low 365 mW rating and tight thermal resistance make parallel use prone to current imbalance and thermal runaway. For higher voltage, select a single-part solution like BZX8850S-B10-Q (10 V); for higher current, use a higher-power Zener such as BZX85C3V9 in DO-35.
BZX8850S-B3V9-QYL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8850S-Q
- Package/Case:
- SOD-882
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±2%
- 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-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006BD-2
BZX8850S-B3V9-QYL FAQ
1.How can I place an order for BZX8850S-B3V9-QYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850S-B3V9-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-B3V9-QYL reliable?
The price and inventory of BZX8850S-B3V9-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-B3V9-QYL is usually 5 days.
3.What payment methods are accepted for BZX8850S-B3V9-QYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850S-B3V9-QYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850S-B3V9-QYL?
BZX8850S-B3V9-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850S-B3V9-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-B3V9-QYL?
For technical support, including BZX8850S-B3V9-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850S-B3V9-QYL requirements.
6.How does Aetrix verify that BZX8850S-B3V9-QYL is sourced from the original manufacturer or authorized distributors?
All BZX8850S-B3V9-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-B3V9-QYL meets industry standards.
7.What is the process for return or replacement of BZX8850S-B3V9-QYL?
All BZX8850S-B3V9-QYL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850S-B3V9-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-B3V9-QYL part is unused and in its original packaging.
Return procedure for BZX8850S-B3V9-QYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850S-B3V9-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
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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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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