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Nexperia USA Inc. BZX8850S-B4V3-QYL
- Part No.:
- BZX8850S-B4V3-QYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850S-B4V3-QYL.pdf
- Description:
- DIODE ZENER 4.3V 365MW DFN1006BD
- Quantity:
- Payment:
- Shipping:
Inventory:6,093
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Product details
Overview
BZX8850S-B4V3-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 4.3 V Zener voltage at 50 µA test current, with ±2 % tolerance, 365 mW total power dissipation, and 95 Ω differential resistance at 5 mA - optimized for battery-powered portable electronics and automotive sensor interfaces.
For engineers reviewing the BZX8850S-B4V3-QYL datasheet, BZX8850S-B4V3-QYL pinout, BZX8850S-B4V3-QYL application, or BZX8850S-B4V3-QYL equivalent, key selection criteria include its ultra-small DFN1006BD-2 (SOD882BD) package with side-wettable flanks, AEC-Q101 qualification, low leakage behavior, and specified performance at 50 µA bias - critical for low-quiescent-current designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and temperature conditions. Its electrical characteristics are defined at Tj = 25 °C, with Zener voltage specified at IZ = 50 µA - enabling accurate low-bias referencing without significant self-heating.
The device features intentional minor leakage current optimization per AN90031 for improved switching speed and noise reduction, and exhibits a temperature coefficient of −2.7 mV/K - supporting predictable thermal drift compensation in analog front-ends and sensor signal conditioning paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.21 V to 4.39 V at IZ = 50 µA - ensures tight 4.3 V regulation in low-current bias networks |
| Tolerance | ±2 % - supports high-accuracy voltage reference design without post-calibration |
| Differential Resistance rdiff | 95 Ω at IZ = 5 mA - limits output impedance impact on regulated node stability |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA - enables reliable forward conduction for polarity protection or clamping |
| Total Power Dissipation Ptot | 365 mW at Tamb ≤ 25 °C on FR4 PCB - defines maximum continuous thermal load in standard layout |
| Junction Temperature | −55 °C to +150 °C - supports operation across extended automotive and industrial ambient ranges |
| Thermal Resistance Rth(j-a) | 340 K/W - determines junction-to-ambient temperature rise under steady-state bias |
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 automated optical solder-joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to higher-potential node in reverse-biased Zener operation; marked by cathode bar on top surface |
| 2 | Anode (A) | Connected to lower-potential node (e.g., ground or return path); establishes reverse-bias polarity for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Side-wettable flanks (SWF) | Enables automated X-ray and AOI inspection of solder joints on fine-pitch DFN packages |
| Low test current specification | Rated at 50 µA - minimizes quiescent current draw in always-on battery backup and sensor bias rails |
| Optimized leakage profile | Intentional minor IR increase per AN90031 - reduces switching transients and broadband noise in feedback paths |
| Ultra-compact footprint | 0.65 mm pitch, 1.0 mm × 0.6 mm body - saves PCB area in wearables, ECUs, and miniaturized IoT nodes |
Applications
| Automotive Sensor Reference | Portable Device Voltage Clamp |
|---|---|
Use Scenario: Providing stable 4.3 V reference for analog-to-digital conversion in engine coolant temperature (ECT) or manifold absolute pressure (MAP) sensors. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to fix ADC input range and improve measurement linearity. Use Value: ±2 % tolerance and −2.7 mV/K temperature coefficient enable <±10 mV drift over −40 °C to +125 °C, meeting ASIL-B signal integrity requirements. | Use Scenario: Clamping supply rail spikes in Bluetooth LE earbuds during RF transmit bursts to protect low-voltage PMIC inputs. IC Role / Device Role / Timing Role: Low-leakage Zener clamp placed between VDD and ground to absorb transient energy without loading standby current. Use Value: 365 mW power rating and 95 Ω dynamic impedance limit clamping voltage overshoot to <4.8 V at 5 mA surge, preserving 5 V tolerant IO margins. |
| Industrial PLC Input Protection | Medical Wearable Bias Network |
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers against ESD and overvoltage events. IC Role / Device Role / Timing Role: Zener-based overvoltage clamp integrated into input RC filter network to shunt transients before signal conditioning op-amps. Use Value: AEC-Q101 qualification ensures robustness against 8 kV HBM ESD, while 0.9 V forward voltage allows bidirectional clamping when paired with series diode. | Use Scenario: Generating precise 4.3 V bias for photodiode transimpedance amplifier in pulse oximetry modules powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current Zener reference supplying stable bias to amplifier feedback network in ultra-low-power analog front-end. Use Value: 50 µA test current and 365 mW dissipation allow continuous operation at <1 µA quiescent current, extending CR2032 battery life beyond 12 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850S-C4V3-Q | ±5 % tolerance (vs. ±2 %), same 4.3 V nominal, slightly higher leakage at 5 mA | Acceptable where cost sensitivity outweighs precision; less suitable for closed-loop feedback references | Select for non-critical biasing where tighter tolerance is not required and BOM simplification is prioritized |
| MMSZ4V3T1G | SOD-123 package (2.7 mm × 1.6 mm), 500 mW Ptot, ±5 %, 100 Ω rdiff at 5 mA | Larger footprint and higher thermal mass - better for higher-power transient suppression but incompatible with ultra-dense layouts | Choose when board-level reworkability or legacy SMT process compatibility is required over miniaturization |
Compared with BZX8850S-B4V3-QYL, the C4V3-Q variant trades precision for cost and the MMSZ4V3T1G sacrifices size for higher power handling - making the BZX8850S-B4V3-QYL optimal for AEC-Q101-compliant, space-constrained, low-IQ designs demanding ±2 % regulation accuracy.
Availability
BZX8850S-B4V3-QYL is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable device rail clamping, and industrial PLC input protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8850S-B4V3-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 specializing in high-performance, 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 portfolio, engineered specifically for precision voltage referencing in miniaturized, battery-sensitive, and AEC-Q101-compliant systems - emphasizing ultra-low test current, side-wettable flanks, and thermal stability.
FAQ
What is the Zener voltage tolerance and test condition for BZX8850S-B4V3-QYL?
The BZX8850S-B4V3-QYL has a ±2 % Zener voltage tolerance, specified at a test current of 50 µA and junction temperature of 25 °C. The actual VZ range is 4.21 V to 4.39 V under these conditions, enabling accurate low-bias referencing without significant self-heating effects.
Is BZX8850S-B4V3-QYL suitable for automotive applications?
Yes - it is fully qualified to AEC-Q101 standards, including stress tests for temperature cycling, high-temperature reverse bias, and ESD robustness. Its operating ambient temperature range of −55 °C to +150 °C and junction temperature limit of 150 °C make it appropriate for under-hood and cabin ECU applications.
How does the side-wettable flank (SWF) feature benefit manufacturing?
The SWF design on the DFN1006BD-2 package enables automated optical inspection (AOI) and X-ray analysis of solder joint quality on both side terminals. This improves first-pass yield in high-volume SMT lines and supports IPC-A-610 Class 2/3 compliance for automotive and medical assemblies.
Can BZX8850S-B4V3-QYL be used in forward conduction mode?
Yes - its forward voltage is guaranteed ≤ 0.9 V at 10 mA, allowing use as a low-drop rectifier or polarity protection diode. However, its primary design intent is reverse-bias Zener regulation; forward conduction should be limited to brief transients or auxiliary functions within its 200 mA absolute maximum forward current rating.
BZX8850S-B4V3-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):
- 4.3 V
- Tolerance:
- ±2%
- Power - Max:
- 365 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 4 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-B4V3-QYL FAQ
1.How can I place an order for BZX8850S-B4V3-QYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850S-B4V3-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-B4V3-QYL reliable?
The price and inventory of BZX8850S-B4V3-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-B4V3-QYL is usually 5 days.
3.What payment methods are accepted for BZX8850S-B4V3-QYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850S-B4V3-QYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850S-B4V3-QYL?
BZX8850S-B4V3-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850S-B4V3-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-B4V3-QYL?
For technical support, including BZX8850S-B4V3-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850S-B4V3-QYL requirements.
6.How does Aetrix verify that BZX8850S-B4V3-QYL is sourced from the original manufacturer or authorized distributors?
All BZX8850S-B4V3-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-B4V3-QYL meets industry standards.
7.What is the process for return or replacement of BZX8850S-B4V3-QYL?
All BZX8850S-B4V3-QYL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850S-B4V3-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-B4V3-QYL part is unused and in its original packaging.
Return procedure for BZX8850S-B4V3-QYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850S-B4V3-QYL Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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