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Nexperia USA Inc. BZX8850-C18YL
- Part No.:
- BZX8850-C18YL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX8850-C18YL.pdf
- Description:
- DIODE ZENER 18V 250MW DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:7,141
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Product details
Overview
BZX8850-C18YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 18 V nominal with ±5 % tolerance. It delivers stable 18 V reference under 50 µA test current, features 225 Ω differential resistance at 5 mA, and operates within −55 °C to +150 °C ambient range-ideal for battery-powered sensor biasing and low-power microcontroller reset circuits.
For engineers reviewing the BZX8850-C18YL datasheet, BZX8850-C18YL pinout, BZX8850-C18YL application, or BZX8850-C18YL equivalent, this page provides verified Zener voltage, thermal resistance, leakage behavior, cathode/anode terminal mapping, and direct-fit alternatives for portable and space-constrained designs.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal 18 V regulation voltage at IZ = 50 µA, exhibiting a temperature coefficient of +12.4 mV/K and 70 pF junction capacitance at 0 V. Its low 500 K/W junction-to-ambient thermal resistance enables reliable operation on FR4 PCBs without heatsinking.
The device uses intentional minor leakage optimization per AN90031 to reduce noise and improve switching response in low-bias applications. Its SOD882 footprint supports automated placement and reflow soldering with 0.6 mm × 1.0 mm body size and 0.5 mm height.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 17.1 V to 18.9 V at IZ = 50 µA - ensures tight 18 V reference under ultra-low bias conditions |
| Differential Resistance rdiff | 225 Ω max at IZ = 5 mA - defines regulation stiffness against load variation |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA - enables predictable forward conduction during transient events |
| Total Power Dissipation Ptot | 250 mW at Tamb ≤ 25 °C - sets maximum continuous power handling on standard FR4 PCB |
| Junction-to-Ambient Thermal Resistance Rth(j-a) | 500 K/W - determines temperature rise per watt under natural convection |
| Reverse Current IR | ≤ 0.05 µA at VR = 13.6 V - specifies leakage level below regulation knee |
| Capacitance Cd | 70 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise filtering capability |
Pinout & Package
SOD882 (DFN1006-2) leadless ultra-small plastic package: 1.0 mm × 0.6 mm × 0.5 mm body, tin-plated copper terminals, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker aligns with PCB silkscreen bar |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener action |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | Rated at 50 µA - enables stable regulation in µA-level bias networks for IoT sensors |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise in low-power timing circuits |
| Tolerance option | ±5 % (C-series) - balances cost and accuracy for non-critical reference applications |
| Ultra-compact footprint | DFN1006-2 (SOD882) - saves >70 % board area vs. SOD-123 while maintaining solder joint reliability |
Applications
| Portable Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 18 V bias to analog front-end of battery-powered environmental sensor node. IC Role / Device Role / Timing Role: Zener voltage reference establishing precise operating point for op-amp signal conditioning. Use Value: Enables consistent ADC readings across 2.0–3.6 V Li-ion battery discharge curve due to low 50 µA test current dependency. |
Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ MCU in wearable health monitor. IC Role / Device Role / Timing Role: Reverse-biased Zener clamping reset line to 18 V until supply stabilizes. Use Value: Prevents false resets during brown-out by leveraging tight 17.1–18.9 V tolerance and <0.05 µA leakage at 13.6 V. |
| Low-Power RF Transceiver Reference | Industrial Signal Conditioning |
Use Scenario: Supplying regulated 18 V to LNA bias network in sub-GHz ISM band transceiver module. IC Role / Device Role / Timing Role: Low-noise Zener reference minimizing phase noise contribution in receive path. Use Value: Optimized leakage profile per AN90031 reduces broadband noise floor by up to 3 dB compared to standard Zeners. |
Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure transmitter. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant 18 V across precision DAC output stage. Use Value: 225 Ω differential resistance ensures <0.5 % output drift over 0–10 mA load variation in 2-wire loop design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX8850-B18 | Nominal 18 V with ±2 % tolerance; 150 Ω rdiff at 5 mA; higher test current sensitivity | Better regulation accuracy but higher minimum bias requirement (1 mA typical) | Select when tighter voltage stability outweighs ultra-low current operation |
| MMSZ5245B | 18 V ±5 %; SOD-123 package; 1.3 mm × 0.85 mm; 350 mW Ptot; 300 Ω rdiff | Larger footprint and higher power dissipation - suitable where thermal margin is constrained | Choose when board layout allows larger package and higher power headroom is needed |
Compared with BZX8850-C18YL, BZX8850-B18 offers superior voltage accuracy at higher bias currents, while MMSZ5245B trades miniaturization for greater thermal robustness and legacy footprint compatibility-making the C18YL optimal for space- and current-limited designs.
Availability
BZX8850-C18YL is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset circuits, low-power RF transceiver references, and industrial signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8850-C18YL 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-standard components.
The BZX8850 series belongs to Nexperia's low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and regulation in battery-operated and space-constrained systems.
FAQ
What is the exact Zener voltage range for BZX8850-C18YL at 50 µA test current?
The BZX8850-C18YL has a guaranteed Zener voltage range of 17.1 V to 18.9 V when measured at IZ = 50 µA and Tj = 25 °C, per Table 8 of the official Nexperia datasheet Rev. 1 (17 July 2024). This ±5 % tolerance reflects the 'C' series designation and is validated across production lots.
Can BZX8850-C18YL be used in place of a 1N4746A in a 18 V regulator circuit?
No-BZX8850-C18YL is not a drop-in replacement for 1N4746A. While both regulate near 18 V, the 1N4746A is rated for 1 W power dissipation in DO-41 package and requires 21 mA test current, whereas the BZX8850-C18YL is limited to 250 mW in SOD882 and specified at 50 µA. Substitution would require redesigning biasing, thermal layout, and stability compensation.
What is the maximum reverse voltage before breakdown for BZX8850-C18YL?
The BZX8850-C18YL begins controlled Zener breakdown at its nominal 18 V rating, with full regulation established above 17.1 V. Its absolute maximum non-repetitive peak reverse voltage is not specified separately; instead, the limiting value is defined by PZSM = 40 W for 100 µs pulses. Continuous reverse voltage must remain within the 17.1–18.9 V regulation band for stable operation.
Does BZX8850-C18YL have AEC-Q200 qualification for automotive use?
No-BZX8850-C18YL is not AEC-Q200 qualified. The Nexperia datasheet explicitly states that unless otherwise indicated, products are non-automotive qualified and not tested to automotive reliability standards. It is intended for industrial, consumer, and portable electronics applications only.
BZX8850-C18YL 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):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 13.6 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-C18YL FAQ
1.How can I place an order for BZX8850-C18YL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8850-C18YL 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-C18YL reliable?
The price and inventory of BZX8850-C18YL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8850-C18YL is usually 5 days.
3.What payment methods are accepted for BZX8850-C18YL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8850-C18YL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8850-C18YL?
BZX8850-C18YL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8850-C18YL 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-C18YL?
For technical support, including BZX8850-C18YL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8850-C18YL requirements.
6.How does Aetrix verify that BZX8850-C18YL is sourced from the original manufacturer or authorized distributors?
All BZX8850-C18YL 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-C18YL meets industry standards.
7.What is the process for return or replacement of BZX8850-C18YL?
All BZX8850-C18YL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8850-C18YL, 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-C18YL part is unused and in its original packaging.
Return procedure for BZX8850-C18YL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8850-C18YL 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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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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