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Nexperia USA Inc. BZX8850S-B43-QYL
- Part No.:
- BZX8850S-B43-QYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850S-B43-QYL.pdf
- Description:
- DIODE ZENER 43V 365MW DFN1006BD
- Quantity:
- Payment:
- Shipping:
Inventory:7,091
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Product details
Overview
BZX8850S-B43-QYL from Nexperia is a low-current Zener voltage regulator diode in the BZX8850S-Q series, designed for precision biasing and voltage reference in space-constrained, low-power systems. It delivers a nominal 43 V regulation at 50 µA test current, with ±2 % tolerance (B-series), 365 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX8850S-B43-QYL datasheet, BZX8850S-B43-QYL pinout, BZX8850S-B43-QYL application, or BZX8850S-B43-QYL equivalent, key selection criteria include its ultra-low test current operation, side-wettable DFN1006BD-2 package for automated optical inspection, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This device operates as a two-terminal reverse-biased Zener diode, regulating voltage via controlled avalanche breakdown above 42.1 V (min) and below 43.9 V (max) at IZ = 50 µA. Its differential resistance is 375 Ω at IZ = 0.5 mA and 150 Ω at IZ = 2 mA, supporting stable reference performance across light-load conditions.
Thermal resistance from junction to ambient is 340 K/W on FR4 PCB, and it features a temperature coefficient of +0.05 mV/K - indicating near-zero drift over temperature - alongside 40 pF capacitance at 1 MHz and 0 V reverse bias, minimizing high-frequency coupling in signal-path references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 43 V at IZ = 50 µA - defines precise regulation point for low-bias reference circuits |
| Voltage Tolerance | ±2 % (B-series) - ensures tight output stability without post-calibration in production |
| Power Dissipation | 365 mW at Tamb ≤ 25 °C - supports continuous operation in thermally limited SMT layouts |
| Differential Resistance | 375 Ω at IZ = 0.5 mA - maintains regulation accuracy under varying load currents |
| Reverse Capacitance | 40 pF at f = 1 MHz, VR = 0 V - minimizes signal coupling in high-speed analog monitoring paths |
| Temperature Coefficient | +0.05 mV/K - enables stable voltage reference across −55 °C to +150 °C operating range |
| Forward Voltage | 0.9 V at IF = 10 mA - defines conduction threshold for polarity-sensitive protection configurations |
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) | Connected to regulated output node; marked by cathode bar on top surface |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joints on compact PCBs |
| Low 50 µA test current | Reduces quiescent power draw in battery-powered sensor nodes and IoT endpoints |
| Optimized leakage profile | Intentional minor IR rise improves switching speed and reduces broadband noise in reference buffers |
| Ultra-small footprint | DFN1006BD-2 saves >70 % board area vs. traditional SOD-123 packages |
Applications
| Automotive Cabin Sensors | Industrial IoT Edge Node |
|---|---|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Zener diode providing stable 43 V bias to analog front-end op-amps and ADC drivers. Use Value: AEC-Q101 qualification ensures functional safety compliance; low 50 µA test current extends battery life in wireless cabin sensors. | Use Scenario: Precision reference in battery-operated predictive maintenance vibration monitors. IC Role / Device Role / Timing Role: Low-noise voltage clamp stabilizing supply rails for MEMS accelerometer signal chains. Use Value: Optimized leakage and 40 pF capacitance suppress RF interference in industrial 2.4 GHz ISM band environments. |
| Medical Wearable Power Management | Smart Meter Analog Front-End |
Use Scenario: Regulation of bias voltage for photodiode transimpedance amplifiers in pulse oximeters. IC Role / Device Role / Timing Role: Zener reference setting gain and offset calibration points in ultra-low-power analog signal paths. Use Value: ±2 % tolerance eliminates need for trimming resistors; side-wettable flanks ensure solder joint integrity in high-reliability medical assemblies. | Use Scenario: Reference stabilization for metrology-grade ADCs measuring grid voltage harmonics. IC Role / Device Role / Timing Role: High-stability 43 V Zener used in overvoltage protection and reference divider networks. Use Value: +0.05 mV/K temperature coefficient guarantees <0.1 % drift over −40 °C to +85 °C smart meter operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C43 | ±5 % tolerance, SOT-23 package, 300 mW Ptot, higher rdiff (≥500 Ω) | General-purpose regulation only; not AEC-Q101 qualified or optimized for low-noise | Select when cost sensitivity outweighs automotive qualification and noise performance |
| MMSZ5257B | ±5 % tolerance, SOD-123 package, 500 mW Ptot, VF = 0.9 V at 200 mA | Higher power handling but larger footprint and no side-wettable flanks | Select when thermal margin >365 mW is required and AOI capability is not needed |
Compared with BZX8850S-B43-QYL, BZX84-C43 offers lower cost but sacrifices automotive qualification and low-current precision, while MMSZ5257B provides greater power headroom at the expense of board area and automated inspection compatibility.
Availability
BZX8850S-B43-QYL is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial IoT edge nodes, medical wearable power management, and smart meter analog front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8850S-B43-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 referencing in space-constrained, battery-sensitive, and automotive-grade applications.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX8850S-B43-QYL has a guaranteed Zener voltage range of 42.1 V (minimum) to 43.9 V (maximum) at IZ = 50 µA. Its absolute maximum non-repetitive peak reverse voltage is defined by the 40 W surge rating at 100 µs pulse width, corresponding to ~283 V transient clamping capability under specified conditions.
Is this part suitable for use in reflow-soldered automotive PCBs?
Yes - the DFN1006BD-2 package features side-wettable flanks compatible with standard lead-free reflow profiles, and the device is fully qualified to AEC-Q101. Its thermal resistance (340 K/W) and 150 °C junction temperature rating support reliable operation in under-hood and cabin automotive environments.
How does the "B" suffix differ from "C" in the BZX8850S-Q series?
The "B" suffix denotes ±2 % voltage tolerance (e.g., BZX8850S-B43-QYL), while "C" indicates approximately ±5 % tolerance (e.g., BZX8850S-C43-Q). Both share identical package, thermal specs, and AEC-Q101 qualification, but "B" parts enable tighter regulation in precision analog circuits where calibration overhead must be minimized.
Can this Zener diode be used in forward-bias protection configurations?
Yes - its forward voltage is specified at 0.9 V @ 10 mA, making it usable as a low-drop clamp in polarity-reversal protection circuits. However, its primary design intent is reverse-bias regulation; forward conduction is limited to 200 mA absolute maximum, and sustained forward operation exceeds its optimized thermal design envelope.
BZX8850S-B43-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):
- 43 V
- Tolerance:
- ±2%
- Power - Max:
- 365 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.6 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-B43-QYL FAQ
1.How can I place an order for BZX8850S-B43-QYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850S-B43-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-B43-QYL reliable?
The price and inventory of BZX8850S-B43-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-B43-QYL is usually 5 days.
3.What payment methods are accepted for BZX8850S-B43-QYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850S-B43-QYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850S-B43-QYL?
BZX8850S-B43-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850S-B43-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-B43-QYL?
For technical support, including BZX8850S-B43-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850S-B43-QYL requirements.
6.How does Aetrix verify that BZX8850S-B43-QYL is sourced from the original manufacturer or authorized distributors?
All BZX8850S-B43-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-B43-QYL meets industry standards.
7.What is the process for return or replacement of BZX8850S-B43-QYL?
All BZX8850S-B43-QYL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850S-B43-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-B43-QYL part is unused and in its original packaging.
Return procedure for BZX8850S-B43-QYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850S-B43-QYL Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
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
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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