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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZX8850S-B9V1-QYL

Name: BZX8850S-B9V1-QYL
Brand: Nexperia USA Inc.
SKU: BZX8850S-B9V1-QYL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX8850S-B9V1-QYL

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SOD-882

Datasheet:: BZX8850S-B9V1-QYL.pdf

Description:: DIODE ZENER 9.1V 365MW DFN1006BD

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Product details

Overview

BZX8850S-B9V1-QYL from Nexperia is a low-current Zener voltage regulator diode in an ultra-small DFN1006BD-2 (SOD882BD) package, designed for precision voltage reference and biasing in space-constrained, low-power systems. It delivers a nominal 9.1 V regulation at 50 µA test current, with ±2 % tolerance, 100 Ω differential resistance at 5 mA, and AEC-Q101 qualification for automotive use.

For engineers reviewing the BZX8850S-B9V1-QYL datasheet, BZX8850S-B9V1-QYL pinout, BZX8850S-B9V1-QYL application, or BZX8850S-B9V1-QYL equivalent, key selection criteria include its 9.1 V nominal Zener voltage, side-wettable flank package for automated optical inspection, low 50 µA test current suitability for battery-powered sensors, and automotive-grade reliability under −40 °C to +125 °C operating conditions.

Technical Context

This device operates as a two-terminal reverse-biased Zener diode, maintaining stable output voltage across load and supply variations via controlled avalanche breakdown. Its 9.1 V nominal Zener voltage is specified at I_Z = 50 µA, with temperature coefficient of +3.8 mV/K and typical junction capacitance of 150 pF at 0 V.

The SOD882BD package enables high-density PCB layouts and supports reflow soldering with verified side-wettable flanks for solder joint integrity verification. Thermal resistance from junction to ambient is 340 K/W on standard FR4, limiting continuous power dissipation to 365 mW at T_amb ≤ 25 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	9.1 V nominal at I_Z = 50 µA; tight ±2 % tolerance ensures accurate reference in low-bias circuits
Differential Resistance r_diff	100 Ω max at I_Z = 5 mA; low impedance maintains regulation stability under small load shifts
Forward Voltage V_F	0.9 V max at I_F = 10 mA; enables predictable forward conduction during transient protection
Total Power Dissipation P_tot	365 mW max at T_amb ≤ 25 °C; defines thermal derating envelope for PCB layout planning
Reverse Current I_R	0.1 µA max at V_R = 7.0 V; ultra-low leakage preserves battery life in always-on monitoring nodes
Junction Temperature T_j	150 °C max; supports operation in under-hood automotive environments with proper thermal design
AEC-Q101 Qualified	Qualified per Stress Test Qualification for Discrete Semiconductors; validated for automotive electronics use

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 automated optical inspection and reliable reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; marking bar on top surface identifies this terminal
2	Anode (A)	Connected to ground or lower-potential rail; reverse-biased configuration enables Zener operation

Key Features

Feature	Design Value
Ultra-small footprint	DFN1006BD-2 (1.0 mm × 0.6 mm) enables placement in wearables, sensor modules, and compact ECUs
Low test current operation	Specified at 50 µA - ideal for energy harvesting and coin-cell–powered IoT endpoints
Optimized switching & noise	Intentional minor leakage rise reduces switching transients and improves signal integrity in ADC reference paths
Automotive-grade reliability	AEC-Q101 qualified with −55 °C to +150 °C storage and −40 °C to +125 °C operating range
Side-wettable flanks	Enables automated X-ray and AOI inspection of solder joints without requiring additional test points

Applications

Automotive Cabin Sensors

Portable Medical Monitors

Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules.

IC Role / Device Role / Timing Role: Zener diode providing stable 9.1 V bias to analog front-end amplifiers and ADCs.

Use Value: ±2 % tolerance and +3.8 mV/K TC ensure <±10 mV drift over −40 °C to +85 °C, meeting ASIL-B sensor accuracy requirements.

Use Scenario: Precision reference in battery-operated pulse oximeters with low-duty-cycle sampling.

IC Role / Device Role / Timing Role: Low-current Zener regulating reference voltage for analog signal conditioning circuitry.

Use Value: 50 µA test current and 0.1 µA leakage at 7 V extend single-CR2032 battery life beyond 12 months in standby mode.

Industrial Smart Transmitters

Consumer Wearable Chargers

Use Scenario: Supply rail clamping and reference stabilization in 4–20 mA loop-powered field transmitters.

IC Role / Device Role / Timing Role: Two-terminal shunt regulator maintaining stable bias for HART modem ICs and isolation amplifiers.

Use Value: 365 mW power rating and 340 K/W R_th(j-a) allow direct mounting on minimal copper area while sustaining 85 °C ambient operation.

Use Scenario: Overvoltage protection and reference generation in Qi-compliant wireless charging receiver modules.

IC Role / Device Role / Timing Role: Zener clamp protecting LDO input and setting feedback divider reference point.

Use Value: 100 Ω differential resistance and 150 pF capacitance minimize interference with 110–205 kHz carrier signals and maintain regulation during burst-mode charging.

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-C9V1-Q	±5 % tolerance vs. ±2 %; identical package, pinout, and thermal specs	Acceptable where cost sensitivity outweighs precision requirement (e.g., non-critical bias rails)	Select when tighter regulation is unnecessary and BOM cost reduction is prioritized
MMSZ5240B-TP	SOD-123 package (larger); 9.1 V ±5 %; 500 mW P_tot; no AEC-Q101 qualification	Used in industrial controls but not automotive due to lack of automotive qualification	Choose only for non-automotive designs needing higher power margin and legacy footprint compatibility

Compared with BZX8850S-B9V1-QYL, the C9V1-Q offers relaxed tolerance at lower cost in the same footprint, while MMSZ5240B-TP trades automotive qualification and miniaturization for higher power handling and broader industry availability - making the BZX8850S-B9V1-QYL optimal for space- and reliability-critical automotive and portable applications.

Availability

BZX8850S-B9V1-QYL is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial smart transmitters, and consumer wearable chargers requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for BZX8850S-B9V1-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.

The BZX8850S-Q series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for precision voltage referencing in battery-constrained, space-limited, and automotive-qualified applications.

FAQ

What is the maximum reverse voltage the BZX8850S-B9V1-QYL can withstand before breakdown?

The BZX8850S-B9V1-QYL has a nominal Zener voltage of 9.1 V, with guaranteed breakdown occurring between 8.92 V and 9.28 V at I_Z = 50 µA. Its absolute maximum non-repetitive peak reverse voltage is not specified independently, but it is rated for up to 40 W surge power at 100 µs pulse width - implying safe operation below ~12 V DC reverse bias in continuous use per datasheet limiting values.

Does the BZX8850S-B9V1-QYL require a series resistor in typical Zener regulator configurations?

Yes - like all Zener diodes, it requires an external current-limiting resistor to set the operating current within its specified range (50 µA to 5 mA). For 9.1 V regulation from a 12 V supply, a 560 Ω resistor delivers ~5.2 mA, staying within the 365 mW power limit and optimizing differential resistance performance.

Can the BZX8850S-B9V1-QYL be used in place of through-hole Zeners like the 1N4739A?

No - while both regulate at ~9.1 V, the BZX8850S-B9V1-QYL is a surface-mount, low-current (max 5 mA) Zener optimized for miniature, low-power applications, whereas the 1N4739A is a through-hole, high-power (1 W) device. Substitution would require PCB redesign, current-limiting recalculations, and validation of thermal performance in the new footprint.

Is the cathode marking visible on the BZX8850S-B9V1-QYL package?

Yes - the cathode is marked by a visible bar on the top surface of the DFN1006BD-2 package. Pin 1 (cathode) is located at the end with the marking bar, as confirmed in the pinning diagram and package outline (Figure 9), enabling unambiguous orientation during automated placement and visual inspection.

BZX8850S-B9V1-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):: 9.1 V

Tolerance:: ±2%

Power - Max:: 365 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 6.9 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-B9V1-QYL FAQ

1.How can I place an order for BZX8850S-B9V1-QYL through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX8850S-B9V1-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-B9V1-QYL reliable?

The price and inventory of BZX8850S-B9V1-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-B9V1-QYL is usually 5 days.

3.What payment methods are accepted for BZX8850S-B9V1-QYL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850S-B9V1-QYL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX8850S-B9V1-QYL?

BZX8850S-B9V1-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX8850S-B9V1-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-B9V1-QYL?

For technical support, including BZX8850S-B9V1-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850S-B9V1-QYL requirements.

6.How does Aetrix verify that BZX8850S-B9V1-QYL is sourced from the original manufacturer or authorized distributors?

All BZX8850S-B9V1-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-B9V1-QYL meets industry standards.

7.What is the process for return or replacement of BZX8850S-B9V1-QYL?

All BZX8850S-B9V1-QYL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850S-B9V1-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-B9V1-QYL part is unused and in its original packaging.

Return procedure for BZX8850S-B9V1-QYL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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