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Nexperia USA Inc. BZX8850-B43YL
- Part No.:
- BZX8850-B43YL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850-B43YL.pdf
- Description:
- DIODE ZENER 43V 250MW DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:2,264
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Product details
Overview
BZX8850-B43YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 43 V nominal Zener voltage with ±2 % tolerance. It delivers 250 mW total power dissipation, exhibits 375 Ω differential resistance at IZ = 0.5 mA, and features 0.05 µA reverse current at VR = 43 V - optimized for low-bias, battery-powered sensor reference circuits.
For engineers reviewing the BZX8850-B43YL datasheet, BZX8850-B43YL pinout, BZX8850-B43YL application, or BZX8850-B43YL equivalent, this device serves as a stable, ultra-small footprint voltage reference in portable instrumentation, IoT node power monitoring, and low-quiescent microcontroller reset supervision where tight voltage accuracy and minimal leakage are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified test current of 50 µA, enabling accurate regulation under ultra-low bias conditions typical of energy-harvesting and coin-cell applications. Its temperature coefficient is +0.05 mV/K, indicating near-zero drift over ambient range.
The device uses silicon planar technology in a leadless DFN1006-2 package with cathode marked by a top-side bar. Thermal resistance from junction to ambient is 500 K/W on standard FR4 PCB, limiting continuous power handling to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 42.1 V to 43.9 V at IZ = 50 µA - ensures precise 43 V regulation with ±2 % tolerance for stable reference generation |
| Differential Resistance (rdiff) | 375 Ω at IZ = 0.5 mA - defines output impedance affecting load regulation sensitivity in feedback paths |
| Reverse Current (IR) | 0.05 µA at VR = 43 V - enables ultra-low standby power in always-on monitoring circuits |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power limit on standard FR4 PCB |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - defines conduction loss when used in forward-biased protection or clamping roles |
| Junction Temperature (Tj) | 150 °C maximum - constrains thermal design margin for high-ambient industrial deployments |
| Package | SOD882 (DFN1006-2), 1.0 × 0.6 × 0.5 mm - supports high-density layout in space-constrained wearables and modules |
Pinout & Package
SOD882 (DFN1006-2) is a leadless, surface-mount plastic package with two terminals and a cathode-marking bar on the top surface. Dimensions: 1.02 mm × 0.62 mm × 0.55 mm body height; solder pad footprint per Figure 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | Rated at 50 µA - enables reliable regulation in µA-level bias networks without loading sensitive sources |
| Tight voltage tolerance | ±2 % (B-series) - reduces calibration overhead in precision analog front-ends and ADC reference buffers |
| Ultra-small footprint | DFN1006-2 (1.0 × 0.6 mm) - saves >60 % board area versus SOD-323 while maintaining thermal performance |
| Optimized leakage profile | Intentional minor rise in leakage per AN90031 - improves switching speed and reduces noise in dynamic reference switching |
| Robust thermal rating | 150 °C max junction temperature - supports operation in sealed enclosures or near heat-generating components |
Applications
| Portable Sensor Reference | Microcontroller Reset Supervision |
|---|---|
|
Use Scenario: Providing stable 43 V reference for high-voltage sensor signal conditioning in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and stabilize reference node voltage. Use Value: Enables accurate 16-bit ADC conversion of 0–40 V input ranges with <±0.5 % full-scale error, even at 10 µA supply current. |
Use Scenario: Monitoring 48 V DC bus voltage in smart home controllers to trigger MCU reset if undervoltage occurs. IC Role / Device Role / Timing Role: Precision voltage threshold detector feeding comparator input via resistive divider. Use Value: Delivers 43 V ±0.86 V trip point with <1 µA quiescent draw, extending coin-cell life beyond 5 years in maintenance-free installations. |
| IoT Node Power Monitoring | Low-Power Analog Front-End Biasing |
|
Use Scenario: Measuring Li-ion stack voltage in asset-tracking tags using resistive scaling into MCU ADC. IC Role / Device Role / Timing Role: Zener-based shunt regulator supplying clean bias to voltage divider network. Use Value: Maintains <0.1 % reference drift across −40 to +85 °C, eliminating need for software compensation in firmware. |
Use Scenario: Generating stable bias for op-amp input stages in ultra-low-power gas detection circuits. IC Role / Device Role / Timing Role: Low-leakage voltage reference source for amplifier offset nulling and gain-setting networks. Use Value: 0.05 µA reverse current prevents measurable error in pA-level transimpedance amplifier feedback paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850-C43 | ±5 % tolerance (vs. ±2 %), identical VZ range and package | Acceptable where cost sensitivity outweighs precision requirement | Select for non-critical biasing where 43 V ±2.15 V meets system margin |
| MMSZ43ET1G | Same 43 V nominal, ±5 % tolerance, SOD-123 package (2.7 × 1.6 mm) | Requires 3.4× more PCB area; higher thermal resistance (300 K/W vs. 500 K/W) | Choose only if legacy SOD-123 footprint compatibility is mandatory |
Compared with BZX8850-B43YL, the C43 variant trades precision for cost in identical packaging, while MMSZ43ET1G sacrifices size and thermal efficiency for broader distributor availability - making BZX8850-B43YL optimal for new designs prioritizing miniaturization and voltage accuracy.
Availability
BZX8850-B43YL is available at Aetrix Electronics and suitable for portable sensor reference, microcontroller reset supervision, and IoT node power monitoring requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8850-B43YL 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 and miniaturization.
The BZX8850 series belongs to Nexperia's low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and regulation in space-constrained, battery-operated systems.
FAQ
What is the maximum continuous reverse power dissipation for BZX8850-B43YL?
The maximum continuous total power dissipation is 250 mW at ambient temperature ≤ 25 °C when mounted on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 2.0 mW/°C based on thermal resistance of 500 K/W.
How does the ±2 % tolerance affect circuit accuracy in a 43 V reference application?
With ±2 % tolerance, the actual Zener voltage falls between 42.1 V and 43.9 V at 50 µA test current. This translates to ±0.86 V absolute error, which must be accommodated in system-level tolerance budgets - especially critical in high-resolution ADC reference or comparator threshold designs.
Can BZX8850-B43YL be used in forward conduction mode?
Yes - it exhibits a forward voltage of 0.9 V at 10 mA, making it usable as a low-drop rectifier or clamping diode. However, its primary design intent and characterization are for reverse-biased Zener operation; forward characteristics are secondary and not optimized for high-current switching.
Is the SOD882 package compatible with standard reflow soldering profiles?
Yes - the DFN1006-2 package is qualified for lead-free reflow per JEDEC J-STD-020. Recommended peak temperature is 260 °C for ≤ 30 seconds, with preheat ramp rate ≤ 3 °C/s. Figure 10 provides the exact solder land pattern for optimal thermal and mechanical reliability.
BZX8850-B43YL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8850
- Package/Case:
- SOD-882
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±2%
- Power - Max:
- 250 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006-2
BZX8850-B43YL FAQ
1.How can I place an order for BZX8850-B43YL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850-B43YL 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 BZX8850-B43YL reliable?
The price and inventory of BZX8850-B43YL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850-B43YL is usually 5 days.
3.What payment methods are accepted for BZX8850-B43YL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850-B43YL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850-B43YL?
BZX8850-B43YL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850-B43YL 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 BZX8850-B43YL?
For technical support, including BZX8850-B43YL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850-B43YL requirements.
6.How does Aetrix verify that BZX8850-B43YL is sourced from the original manufacturer or authorized distributors?
All BZX8850-B43YL 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 BZX8850-B43YL meets industry standards.
7.What is the process for return or replacement of BZX8850-B43YL?
All BZX8850-B43YL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850-B43YL, 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 BZX8850-B43YL part is unused and in its original packaging.
Return procedure for BZX8850-B43YL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850-B43YL Tags
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