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Nexperia USA Inc. BZX8850-C4V3YL
- Part No.:
- BZX8850-C4V3YL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850-C4V3YL.pdf
- Description:
- DIODE ZENER 4.3V 250MW DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:5,176
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Product details
Overview
BZX8850-C4V3YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 4.3 V nominal with ±2 % tolerance. It delivers stable reference voltage at 50 µA test current, exhibits 95 Ω differential resistance at 5 mA, and features 2.0 mV/K temperature coefficient - optimized for battery-powered sensor interfaces and low-power microcontroller reset circuits.
For engineers reviewing the BZX8850-C4V3YL datasheet, BZX8850-C4V3YL pinout, BZX8850-C4V3YL application, or BZX8850-C4V3YL equivalent, key selection criteria include low-bias operation capability, tight voltage tolerance, ultra-small footprint compatibility, and thermal performance under ambient temperatures up to +150 °C.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 4.3 V, specified at IZ = 50 µA - enabling reliable regulation in micropower circuits where bias current must remain below 100 µA. Its differential resistance of 95 Ω at 5 mA ensures minimal voltage deviation under moderate load transients.
The device uses a silicon planar Zener structure with intentional leakage optimization per AN90031, yielding improved switching speed and reduced noise versus standard low-current Zeners. Thermal resistance from junction-to-ambient is 500 K/W on FR4 PCB, limiting continuous power dissipation to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.09 V to 4.52 V at IZ = 50 µA - defines tight 4.3 V ±2 % regulation window for precision references |
| Differential Resistance rdiff | 95 Ω at IZ = 5 mA - determines output impedance and load regulation error under dynamic current draw |
| Temperature Coefficient SZ | −2.7 mV/K - quantifies voltage drift over temperature; enables accurate compensation in wide-range environments | Forward Voltage VF | 0.9 V at IF = 10 mA - sets forward conduction threshold for polarity-sensitive protection or clamping use |
| Total Power Dissipation Ptot | 250 mW at Tamb ≤ 25 °C - constrains maximum steady-state power in compact PCB layouts |
| Junction Temperature Tj | 150 °C maximum - defines absolute thermal limit for reliability in sealed or high-ambient enclosures |
| Reverse Current IR | 4.0 µA at VR = 2.0 V - specifies leakage level near knee voltage, critical for standby current budgets |
Pinout & Package
Package: SOD882 (DFN1006-2), leadless ultra-small surface-mount plastic package measuring 1.0 mm × 0.6 mm × 0.5 mm; cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive terminal defining Zener breakdown direction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | Rated at 50 µA - enables stable regulation in energy-constrained systems like coin-cell IoT sensors |
| Tight voltage tolerance | ±2 % (C-series) - reduces need for post-regulation trimming in precision analog signal chains |
| Optimized leakage profile | Intentional minor rise per AN90031 - improves transient response and lowers broadband noise in reference paths |
| Ultra-compact footprint | SOD882 (1.0 × 0.6 mm) - supports high-density routing in space-limited wearables and medical patches |
Applications
| Microcontroller Reset Circuit | Portable Sensor Reference |
|---|---|
Use Scenario: Providing clean, stable reset voltage to ARM Cortex-M0+ MCU during cold start and brown-out conditions. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt reference, clamping reset line to 4.3 V until supply reaches operational threshold. Use Value: Enables deterministic reset assertion with <1 µA quiescent current draw, extending battery life in BLE beacon applications. |
Use Scenario: Supplying excitation voltage to MEMS pressure sensor in handheld environmental monitor. IC Role / Device Role / Timing Role: Functions as low-drift voltage reference for ADC biasing and sensor bridge excitation. Use Value: −2.7 mV/K temperature coefficient minimizes offset drift across −25 °C to +70 °C operating range. |
| Low-Power LDO Feedback Divider | ESD-Sensitive Signal Clamp |
Use Scenario: Setting output voltage of 3.3 V low-quiescent LDO via resistive feedback network. IC Role / Device Role / Timing Role: Replaces standard resistor divider's top leg with Zener to stabilize reference point against input ripple. Use Value: 95 Ω dynamic impedance maintains regulation accuracy despite 10–100 µA feedback current variation. |
Use Scenario: Protecting I²C data lines in industrial controller against 8 kV HBM ESD events. IC Role / Device Role / Timing Role: Shunt clamp activated only above 4.3 V, preserving signal integrity below logic-high threshold. Use Value: Ultra-low leakage (4 µA @ 2 V) prevents DC loading of 10 kΩ pull-up networks while clamping fast transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V3 | SC-70 package (2.2 × 1.35 mm); 500 mW rating; ±5 % tolerance; 120 Ω rdiff at 5 mA | Higher power handling but 2.2× larger footprint; less suitable for ultra-dense PCBs | Select when higher surge immunity or legacy SC-70 layout compatibility is required |
| MMSZ4689 | SOD-123 package (3.7 × 1.6 mm); 500 mW rating; ±5 % tolerance; 100 Ω rdiff at 20 mA | Larger size and higher test current reduce suitability for micropower designs | Prefer for cost-sensitive consumer applications where board space is not constrained |
Compared with BZX84-C4V3 and MMSZ4689, the BZX8850-C4V3YL offers superior space efficiency and tighter tolerance at ultra-low bias current - making it the optimal choice for next-generation wearable and implantable electronics where every micron and microamp matters.
Availability
BZX8850-C4V3YL is available at Aetrix Electronics and suitable for portable sensor nodes, microcontroller reset circuits, and low-power LDO feedback networks requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8850-C4V3YL 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-grade and industrial power solutions.
The BZX8850 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-operated and space-constrained applications demanding tight voltage tolerance and minimal leakage.
FAQ
What is the maximum reverse voltage this Zener can sustain before breakdown?
The BZX8850-C4V3YL has a nominal Zener voltage of 4.3 V, with guaranteed breakdown occurring between 4.09 V and 4.52 V at 50 µA test current. It is not rated for sustained operation above its specified VZ range - exceeding 4.52 V risks uncontrolled current flow unless limited by external series resistance.
Can this device be used in forward-biased configuration as a regular diode?
Yes - the BZX8850-C4V3YL exhibits a forward voltage of 0.9 V at 10 mA, consistent with standard silicon PN junction behavior. However, its primary design intent and characterization are for reverse-bias Zener operation; forward conduction is secondary and not optimized for high-current rectification.
How does the "C" suffix differ from "B" in the BZX8850 naming convention?
The "C" suffix denotes ±2 % voltage tolerance and incorporates an intentional minor leakage current enhancement per AN90031 for faster switching and lower noise. The "B" variant offers ±5 % tolerance and standard leakage characteristics - making "C" preferred for precision timing and low-noise analog references.
Is thermal derating required when mounting on a 2-layer PCB with limited copper area?
Yes - the 500 K/W junction-to-ambient thermal resistance assumes a single-sided FR4 PCB with standard footprint. On 2-layer boards with minimal copper pour, derating is essential: power must be reduced by ~20 % at 70 °C ambient to maintain Tj ≤ 150 °C, verified using Rth(j-a) measurements per JEDEC JESD51-2.
BZX8850-C4V3YL 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):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 250 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006-2
BZX8850-C4V3YL FAQ
1.How can I place an order for BZX8850-C4V3YL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850-C4V3YL 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-C4V3YL reliable?
The price and inventory of BZX8850-C4V3YL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850-C4V3YL is usually 5 days.
3.What payment methods are accepted for BZX8850-C4V3YL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850-C4V3YL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850-C4V3YL?
BZX8850-C4V3YL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850-C4V3YL 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-C4V3YL?
For technical support, including BZX8850-C4V3YL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850-C4V3YL requirements.
6.How does Aetrix verify that BZX8850-C4V3YL is sourced from the original manufacturer or authorized distributors?
All BZX8850-C4V3YL 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-C4V3YL meets industry standards.
7.What is the process for return or replacement of BZX8850-C4V3YL?
All BZX8850-C4V3YL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850-C4V3YL, 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-C4V3YL part is unused and in its original packaging.
Return procedure for BZX8850-C4V3YL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850-C4V3YL 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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Diodes Incorporated
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onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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