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Nexperia USA Inc. BZX8850S-B39-QYL
- Part No.:
- BZX8850S-B39-QYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850S-B39-QYL.pdf
- Description:
- DIODE ZENER 39V 365MW DFN1006BD
- Quantity:
- Payment:
- Shipping:
Inventory:5,299
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Product details
Overview
BZX8850S-B39-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 39 V Zener voltage at 50 µA test current, with ±2 % tolerance (B-series), 350 Ω dynamic resistance at 2 mA, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX8850S-B39-QYL datasheet, BZX8850S-B39-QYL pinout, BZX8850S-B39-QYL application, or BZX8850S-B39-QYL equivalent, this device is selected for ultra-low-bias voltage stabilization in battery-powered sensors, ECU reference rails, and portable instrumentation where side-wettable flanks support automated optical inspection (AOI) and reliable reflow soldering on DFN1006BD-2 footprints.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 38.2 V to 39.8 V at IZ = 50 µA, exhibiting a positive temperature coefficient of +0.05 mV/K and 45 pF junction capacitance at 0 V. Its low 50 µA test current enables stable regulation under microampere-level bias conditions typical in sleep-mode circuits.
The device uses a planar silicon process with side-wettable flanks on a DFN1006BD-2 (SOD882BD) package, enabling high-density placement and compatibility with IPC-7351B-compliant reflow profiles. Thermal resistance from junction-to-ambient is 340 K/W on FR4 PCB, limiting continuous power dissipation to 365 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 38.2 V to 39.8 V at IZ = 50 µA - defines precise regulation point for 39 V nominal rail |
| Tolerance | ±2 % (B-series) - ensures tight voltage accuracy without post-production trimming |
| Differential Resistance rdiff | 350 Ω at IZ = 2 mA - determines load regulation error under small-signal current variation |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA - supports bidirectional protection or dual-use as clamp diode |
| Power Dissipation Ptot | 365 mW at Tamb ≤ 25 °C - sets maximum steady-state thermal budget on standard FR4 PCB |
| Junction Temperature | −55 °C to +150 °C - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing per AEC standard |
Pinout & Package
Package: DFN1006BD-2 (SOD882BD), leadless surface-mount plastic package measuring 1.0 mm × 0.6 mm × 0.47 mm with side-wettable flanks for AOI-compatible solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar on top surface identifies this terminal |
| 2 (A) | Anode | Connected to ground or lower-potential reference; forms reverse-biased junction during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low test current | 50 µA - enables stable regulation in micropower systems such as IoT sensor nodes and battery-backed memory |
| Side-wettable flanks | DFN1006BD-2 package geometry - allows automated optical inspection of solder fillets for high-reliability automotive assembly |
| Automotive qualification | AEC-Q101 compliant - certified for use in engine control units, body electronics, and ADAS subsystems |
| Low leakage optimization | Intentional minor IR rise per AN90031 - improves switching speed and reduces noise in feedback paths |
| Thermal robustness | 150 °C max junction temperature - supports operation in high-ambient under-dash environments |
Applications
| Automotive ECU Reference Rail | Portable Gas Sensor Biasing |
|---|---|
|
Use Scenario: Providing stable 39 V reference for analog front-end amplifiers in engine control modules. IC Role / Device Role / Timing Role: Zener voltage regulator supplying precision bias to op-amps and ADC references. Use Value: ±2 % tolerance and low 50 µA test current ensure minimal current draw while maintaining <0.5 % reference drift over temperature. |
Use Scenario: Generating fixed bias voltage for electrochemical gas detection cells in handheld safety monitors. IC Role / Device Role / Timing Role: Low-current Zener regulator establishing calibrated excitation voltage across sensing electrodes. Use Value: 350 Ω dynamic resistance limits output impedance, improving signal-to-noise ratio in µA-level sensor current measurement. |
| Industrial PLC Input Protection | Medical Wearable Power Sequencing |
|
Use Scenario: Clamping and regulating input voltage to isolated analog inputs in programmable logic controllers. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as overvoltage protector and reference source for input scaling networks. Use Value: 365 mW power rating and 45 pF capacitance allow fast transient suppression without compromising signal bandwidth up to 1 MHz. |
Use Scenario: Enabling controlled power-up sequencing of low-power MCU and BLE radio in compact wearable devices. IC Role / Device Role / Timing Role: Precision voltage reference for supervisor ICs monitoring 3.3 V and 5 V rails during startup. Use Value: AEC-Q101 qualification and −55 °C to +150 °C operating range ensure reliability across clinical and consumer usage conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850S-C39-Q | ±5 % tolerance (C-series), same VZ range, identical package and thermal specs | Lower cost for non-critical biasing where tighter regulation is unnecessary | Select when ±2 % accuracy is not required and cost sensitivity dominates design trade-offs |
| MMSZ5241B-7-F | 36 V nominal, ±5 %, SOD-123 package, 500 mW Ptot, no AEC-Q101 qualification | Larger footprint, higher power, but lacks automotive qualification and side-wettable flanks | Choose only for non-automotive industrial designs requiring higher power margin and legacy footprint compatibility |
Compared with BZX8850S-B39-QYL, the C39 variant trades accuracy for cost in non-critical roles, while MMSZ5241B-7-F offers higher power but sacrifices automotive compliance and miniaturization-making the B39-QYL optimal for space- and reliability-constrained automotive and portable applications.
Availability
BZX8850S-B39-QYL is available at Aetrix Electronics and suitable for automotive ECU design, portable sensor calibration, and medical wearable power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8850S-B39-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 discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.
The BZX8850S-Q series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for precision voltage reference in battery-operated, space-constrained, and automotive-grade applications demanding AEC-Q101 compliance and side-wettable flanks.
FAQ
What is the maximum reverse current at 39 V before breakdown?
At 39 V reverse bias and Tj = 25 °C, the typical reverse current is ≤ 0.05 µA per datasheet Table 9. This ultra-low leakage ensures minimal quiescent power loss in always-on sensor bias networks and supports accurate low-current measurements in feedback loops.
Can BZX8850S-B39-QYL be used in parallel for higher current handling?
No-Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances that cause current hogging when paralleled. The device is rated for ≤ 200 mA forward current and 40 W non-repetitive surge, but sustained regulation must remain within its 365 mW DC power limit on FR4 PCB.
Is the cathode marking visible after reflow soldering?
Yes-the cathode is indicated by a laser-marked bar on the top surface of the DFN1006BD-2 package, positioned adjacent to pin 1. Side-wettable flanks enable post-reflow AOI verification of solder joint integrity without requiring X-ray inspection.
How does the 50 µA test current affect circuit design?
The 50 µA test current means the diode achieves its specified VZ with minimal bias, allowing integration into µA-level standby circuits. Designers must ensure minimum Zener current remains ≥50 µA under worst-case load and temperature to maintain regulation accuracy and avoid dropout.
BZX8850S-B39-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):
- 39 V
- Tolerance:
- ±2%
- Power - Max:
- 365 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006BD-2
BZX8850S-B39-QYL FAQ
1.How can I place an order for BZX8850S-B39-QYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850S-B39-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-B39-QYL reliable?
The price and inventory of BZX8850S-B39-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-B39-QYL is usually 5 days.
3.What payment methods are accepted for BZX8850S-B39-QYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850S-B39-QYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850S-B39-QYL?
BZX8850S-B39-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850S-B39-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-B39-QYL?
For technical support, including BZX8850S-B39-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850S-B39-QYL requirements.
6.How does Aetrix verify that BZX8850S-B39-QYL is sourced from the original manufacturer or authorized distributors?
All BZX8850S-B39-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-B39-QYL meets industry standards.
7.What is the process for return or replacement of BZX8850S-B39-QYL?
All BZX8850S-B39-QYL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850S-B39-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-B39-QYL part is unused and in its original packaging.
Return procedure for BZX8850S-B39-QYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850S-B39-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
onsemi
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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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