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Nexperia USA Inc. BZX8850-B4V3YL
- Part No.:
- BZX8850-B4V3YL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850-B4V3YL.pdf
- Description:
- DIODE ZENER 4.3V 250MW DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:4,187
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Product details
Overview
BZX8850-B4V3YL 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, features 95 Ω differential resistance at 5 mA, and operates within −55 °C to +150 °C ambient range. Used in battery-powered sensor biasing and low-power microcontroller reset circuits.
For engineers reviewing the BZX8850-B4V3YL datasheet, BZX8850-B4V3YL pinout, BZX8850-B4V3YL application, or BZX8850-B4V3YL equivalent, this page provides verified electrical parameters, thermal limits, package dimensions, cathode/anode terminal mapping, and direct alternatives for low-current voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 4.3 V at IZ = 50 μA, exhibiting a temperature coefficient of −2.7 mV/K and typical capacitance of 150 pF at 0 V. Its low test current enables minimal quiescent power draw in always-on monitoring circuits.
The device uses silicon planar technology with controlled doping to achieve tight 2 % voltage tolerance and stable rdiff ≤ 95 Ω at 5 mA. Its ultra-small DFN1006-2 footprint supports high-density PCB layouts while maintaining thermal resistance of 500 K/W in free air.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.21 V to 4.39 V at IZ = 50 μA - ensures precise 4.3 V reference under low-bias conditions |
| Differential Resistance rdiff | ≤ 95 Ω at IZ = 5 mA - maintains voltage stability against load current variation |
| Temperature Coefficient SZ | −2.7 mV/K - predictable negative drift enables compensation in temperature-sensitive references |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA - allows use as low-drop rectifier or clamp in dual-role circuits |
| Max Power Dissipation Ptot | 250 mW at Tamb ≤ 25 °C - defines safe continuous operation on standard FR4 PCB |
| Reverse Current IR | ≤ 4.0 μA at VR = 2.0 V - guarantees low leakage in high-impedance bias networks |
| Junction Temperature Tj | 150 °C maximum - supports operation in industrial and automotive-adjacent environments |
Pinout & Package
Package: SOD882 (DFN1006-2), leadless ultra-small plastic package; body dimensions 1.0 × 0.6 × 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 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 operation | Specified at 50 μA - reduces standby current in battery-powered systems by >90 % vs. standard 5 mA Zeners |
| Tight voltage tolerance | ±2 % (B-series) - eliminates need for post-layout trimming in precision analog sensor interfaces |
| Ultra-compact packaging | SOD882 footprint (1.0 × 0.6 mm) - enables placement adjacent to IC pins without routing congestion |
| Controlled leakage profile | Optimized minor leakage rise per AN90031 - improves switching speed and reduces noise in dynamic reference paths |
| High-temperature capability | 150 °C max junction temperature - supports deployment in enclosed industrial enclosures without derating |
Applications
| Microcontroller Reset Circuit | Portable Sensor Biasing |
|---|---|
Use Scenario: Provides clean, temperature-stable reset threshold for ARM Cortex-M0+ MCUs in handheld medical devices. IC Role / Device Role / Timing Role: Zener diode acts as precision voltage reference for external reset supervisor IC input. Use Value: 4.3 V nominal with −2.7 mV/K TC ensures reset assertion remains valid across −20 °C to +70 °C operating range. |
Use Scenario: Supplies stable bias voltage to MEMS accelerometer analog front-end in Bluetooth LE wearables. IC Role / Device Role / Timing Role: Functions as low-current voltage regulator for op-amp reference rail. Use Value: 50 μA test current draws only 0.215 μW at 4.3 V, extending coin-cell battery life beyond 2 years. |
| ADC Reference Stabilization | ESD-Protected Signal Clamping |
Use Scenario: Stabilizes internal reference of 12-bit SAR ADC in IoT environmental monitor. IC Role / Device Role / Timing Role: Zener shunt regulates reference divider node against supply ripple. Use Value: 95 Ω rdiff limits reference voltage shift to <1.5 mV under 150 μA load transients. |
Use Scenario: Clamps I²C bus lines to 4.3 V in smart home hub to prevent overvoltage damage. IC Role / Device Role / Timing Role: Reverse-biased Zener absorbs ESD pulses while forward-conducting to VDD. Use Value: 0.9 V VF at 10 mA enables fast clamping to rail without forward voltage overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5227BS-7-F | 4.3 V ±5 %, SOT-323 package, 350 mW Ptot, rdiff = 23 Ω at 20 mA | Higher power handling but larger footprint and looser tolerance | Preferred when higher surge immunity is required and board space permits SOT-323 |
| BZX384-B4V3,115 | 4.3 V ±2 %, SOD-323 package, 300 mW Ptot, rdiff = 90 Ω at 5 mA | Larger 1.7 × 1.25 mm package, higher thermal resistance (400 K/W) | Chosen when legacy SOD-323 footprint compatibility is mandatory |
Compared with BZX8850-B4V3YL, MMBZ5227BS-7-F offers lower impedance but sacrifices precision and size efficiency, while BZX384-B4V3,115 trades miniaturization for established manufacturability-making the BZX8850-B4V3YL optimal for space-constrained, low-power, high-accuracy designs.
Availability
BZX8850-B4V3YL is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset circuits, ADC reference stabilization, and ESD-protected signal clamping requiring stable component supply across high-mix production runs.
Supply support for BZX8850-B4V3YL 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 logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.
The BZX8850 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications demanding tight voltage tolerance and ultra-low bias current.
FAQ
What is the maximum reverse voltage before breakdown for BZX8850-B4V3YL?
The BZX8850-B4V3YL exhibits a guaranteed Zener voltage range of 4.21 V to 4.39 V at 50 μA test current. Breakdown begins within this band; no distinct "maximum reverse voltage before breakdown" is specified, as it is a graded junction device with soft knee characteristics per Figure 5 in the datasheet.
Can BZX8850-B4V3YL be used in forward conduction mode?
Yes - its forward voltage is rated ≤ 0.9 V at 10 mA, making it suitable for low-drop clamping or polarity protection. However, it is not optimized for continuous forward conduction; maximum forward current is limited to 200 mA per absolute maximum ratings, and sustained forward bias above 100 mA risks thermal runaway due to 500 K/W Rth(j-a).
How does the −2.7 mV/K temperature coefficient affect long-term accuracy?
A −2.7 mV/K coefficient means the Zener voltage decreases by 2.7 mV per degree Celsius rise. Over a 100 °C range (−25 °C to +75 °C), total drift is ~270 mV - but since nominal VZ is 4.3 V, this represents ~6.3 % full-scale change. For high-accuracy applications, this must be compensated via circuit design or calibration.
Is the SOD882 package compatible with standard reflow profiles?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The recommended solder paste land pattern (Figure 10) uses 0.3 mm wide × 0.9 mm long pads with 0.7 mm center-to-center spacing. Peak temperature must not exceed 260 °C for ≤ 30 seconds to avoid delamination or marking degradation.
BZX8850-B4V3YL 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:
- ±2%
- 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-B4V3YL FAQ
1.How can I place an order for BZX8850-B4V3YL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850-B4V3YL 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-B4V3YL reliable?
The price and inventory of BZX8850-B4V3YL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850-B4V3YL is usually 5 days.
3.What payment methods are accepted for BZX8850-B4V3YL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850-B4V3YL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850-B4V3YL?
BZX8850-B4V3YL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850-B4V3YL 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-B4V3YL?
For technical support, including BZX8850-B4V3YL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850-B4V3YL requirements.
6.How does Aetrix verify that BZX8850-B4V3YL is sourced from the original manufacturer or authorized distributors?
All BZX8850-B4V3YL 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-B4V3YL meets industry standards.
7.What is the process for return or replacement of BZX8850-B4V3YL?
All BZX8850-B4V3YL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850-B4V3YL, 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-B4V3YL part is unused and in its original packaging.
Return procedure for BZX8850-B4V3YL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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