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Nexperia USA Inc. BZX884S-B18-QYL
- Part No.:
- BZX884S-B18-QYL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-882
- Datasheet:
-
BZX884S-B18-QYL.pdf
- Description:
- DIODE ZENER 18V 365MW DFN1006BD
- Quantity:
- Payment:
- Shipping:
Inventory:7,745
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Product details
Overview
BZX884S-B18-QYL from Nexperia is a ±2 % tolerance Zener diode with 17.6 V to 18.4 V nominal breakdown voltage (VZ), optimized for precision voltage regulation and reference in space-constrained automotive and industrial PCBs. It delivers 365 mW total power dissipation on FR4, features side-wettable flanks for automated optical inspection, and is qualified to AEC-Q101.
For engineers reviewing the BZX884S-B18-QYL datasheet, BZX884S-B18-QYL pinout, BZX884S-B18-QYL application, or BZX884S-B18-QYL equivalent, this page provides verified Zener parameters, SOD882BD package layout, automotive-grade reliability context, and direct substitution guidance for low-power voltage reference design.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse bias at its specified Zener voltage (VZ = 17.6–18.4 V @ IZ = 5 mA) with a typical differential resistance of 50 Ω and temperature coefficient of +12.4 mV/K. Its junction-to-ambient thermal resistance is 340 K/W under standard FR4 mounting conditions.
The diode exhibits ≤0.9 V forward voltage at 10 mA and supports up to 200 mA peak forward current. Reverse leakage remains ≤0.05 μA at 13.5 V (75 % of VZ) and ≤0.05 μA at 15.3 V (85 % of VZ), enabling stable low-current biasing in sensor interfaces and power monitor circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (Nominal) | 18 V - Precise regulation point for 18 V rail stabilization or reference generation |
| VZ Tolerance | ±2 % - Tight tolerance enables accurate voltage setting without post-production trimming |
| IZ Test Current | 5 mA - Standard test condition defining VZ; matches typical low-power reference load currents |
| Ptot | 365 mW - Maximum continuous power on FR4 PCB; defines safe operating area for thermal design |
| rdif | 50 Ω (typ) - Low dynamic impedance ensures minimal output voltage variation under load changes |
| SZ | +12.4 mV/K - Positive temperature coefficient allows predictable drift compensation in multi-diode references |
| Cd | 70 pF @ 1 MHz, 0 V - Low junction capacitance minimizes high-frequency noise coupling in analog signal paths |
Pinout & Package
Package: DFN1006BD-2 (SOD882BD), ultra-small leadless plastic package measuring 1.0 mm × 0.6 mm × 0.47 mm with 0.65 mm pitch and side-wettable flanks for solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to higher-potential node in reverse-bias regulation; marked by bar on top surface |
| 2 | Anode (A) | Connected to lower-potential node (e.g., ground or return path); forms current sink during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joints without X-ray, reducing manufacturing defect escape |
| AEC-Q101 qualification | Validated for automotive under-hood and infotainment applications requiring −40 °C to +125 °C operation |
| Ultra-small footprint | 0.6 mm² board area saves space in dense power management IC layouts and portable electronics |
| Low rdif & tight VZ | 50 Ω dynamic impedance and ±2 % tolerance support stable 18 V reference in feedback loops of DC-DC converters |
| Controlled temperature coefficient | +12.4 mV/K enables predictable thermal drift behavior for calibration-critical sensor excitation circuits |
Applications
| Automotive Sensor Biasing | Industrial Power Monitor Reference |
|---|---|
|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in engine control units. IC Role / Device Role / Timing Role: Zener diode functions as a precision 18 V shunt reference, replacing bulkier TL431-based solutions. Use Value: ±2 % VZ tolerance and +12.4 mV/K coefficient allow direct compensation against ambient temperature shifts in closed-loop calibration. |
Use Scenario: Generating a fixed reference for comparator-based overvoltage detection in 24 V industrial PLC power supplies. IC Role / Device Role / Timing Role: Acts as a passive voltage threshold element in a discrete protection circuit, sinking fault current when input exceeds 18 V. Use Value: 365 mW power rating supports sustained clamping during transient overvoltage events without thermal runaway. |
| Portable Medical Device Voltage Reference | IoT Node Battery Monitoring |
|
Use Scenario: Supplying regulated bias to analog front-end op-amps in handheld ECG signal conditioning modules. IC Role / Device Role / Timing Role: Functions as low-noise, low-capacitance (70 pF) shunt reference to minimize signal path interference. Use Value: Side-wettable flanks ensure reliable reflow soldering on compact flex-rigid PCBs used in wearable medical hardware. |
Use Scenario: Enabling accurate battery voltage measurement in LPWAN sensor nodes using microcontroller ADC with internal reference. IC Role / Device Role / Timing Role: Provides known 18 V reference for resistor-divider scaling of 3.6–4.2 V Li-ion battery voltage into 0–3.3 V ADC range. Use Value: 0.05 μA max reverse leakage at 15.3 V prevents measurable current drain during multi-year sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18 | ±5 % tolerance, 17.1–18.9 V VZ, same SOT-23 package but no AEC-Q101 qualification | Not suitable for automotive environments; acceptable for consumer-grade power monitoring | Select when cost sensitivity outweighs precision and automotive compliance requirements |
| MMSZ5245B | ±5 % tolerance, 17.1–18.9 V VZ, SOD-123 package (larger, no side-wettable flanks) | Larger footprint increases PCB area; lacks AOI capability and AEC-Q101 validation | Choose only if legacy SOD-123 footprint compatibility is mandatory and space is not constrained |
Compared with BZX884S-B18-QYL, BZX84-C18 trades precision and automotive qualification for lower cost, while MMSZ5245B sacrifices miniaturization and manufacturability for broader distributor availability-making the BZX884S-B18-QYL optimal for new AEC-Q101-compliant designs demanding high accuracy in ultra-compact layouts.
Availability
BZX884S-B18-QYL is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power monitor reference, portable medical device voltage reference, and IoT node battery monitoring requiring stable component supply across production lifecycles.
Supply support for BZX884S-B18-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 essential efficiency-enhancing components, delivering high-performance, reliable, and scalable devices for automotive, industrial, and consumer markets.
The BZX884S-Q series belongs to Nexperia's precision Zener diode product line, engineered specifically for AEC-Q101-compliant voltage regulation and reference in miniaturized surface-mount applications where space, thermal performance, and process reliability are critical.
FAQ
What is the maximum reverse voltage (VR) that BZX884S-B18-QYL can withstand before breakdown?
The device is rated for a nominal Zener voltage of 17.6–18.4 V at 5 mA test current. Its absolute maximum reverse voltage is defined by the breakdown characteristic: at 15.3 V (85 % of nominal VZ), reverse current is guaranteed ≤0.05 μA. Breakdown occurs sharply above 17.6 V, with full regulation established by 18.4 V per datasheet Table 8.
Does BZX884S-B18-QYL require a series current-limiting resistor in all applications?
Yes-this is a shunt regulator diode and must always be used with a series resistor to limit current through the diode. For example, at 24 V supply and 5 mA regulation current, a 1.2 kΩ resistor sets appropriate bias. Omitting the resistor risks exceeding the 365 mW power rating and causing thermal failure.
How does the side-wettable flank feature improve manufacturing yield?
The side-wettable flanks on the SOD882BD package allow automated optical inspection (AOI) systems to verify solder fillet formation on the lateral edges of the terminals. This eliminates reliance on X-ray for hidden-joint verification, reducing inspection time and increasing early defect detection in high-volume automotive PCB assembly.
Can BZX884S-B18-QYL replace a TL431 in a feedback loop?
No-it is a two-terminal shunt device without the three-terminal active error amplifier architecture of the TL431. While both regulate voltage, the BZX884S-B18-QYL lacks adjustable reference, gain, or current-sink capability. It can serve as a fixed 18 V reference in simple divider networks but cannot replicate TL431's programmable, high-accuracy closed-loop control.
BZX884S-B18-QYL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-882
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±2.22%
- Power - Max:
- 365 mW
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006BD-2
BZX884S-B18-QYL FAQ
1.How can I place an order for BZX884S-B18-QYL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX884S-B18-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 BZX884S-B18-QYL reliable?
The price and inventory of BZX884S-B18-QYL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX884S-B18-QYL is usually 5 days.
3.What payment methods are accepted for BZX884S-B18-QYL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX884S-B18-QYL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX884S-B18-QYL?
BZX884S-B18-QYL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX884S-B18-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 BZX884S-B18-QYL?
For technical support, including BZX884S-B18-QYL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX884S-B18-QYL requirements.
6.How does Aetrix verify that BZX884S-B18-QYL is sourced from the original manufacturer or authorized distributors?
All BZX884S-B18-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 BZX884S-B18-QYL meets industry standards.
7.What is the process for return or replacement of BZX884S-B18-QYL?
All BZX884S-B18-QYL units undergo pre-shipment inspection (PSI). If there is an issue with BZX884S-B18-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 BZX884S-B18-QYL part is unused and in its original packaging.
Return procedure for BZX884S-B18-QYL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX884S-B18-QYL Tags
-
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
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
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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