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NXP Semiconductors BZX284-C18,115
- Part No.:
- BZX284-C18,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SOD-110
- Datasheet:
-
BZX284-C18,115.pdf
- Description:
- DIODE ZENER 18V 400MW SOD110
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
BZX284-C18,115 from NXP Semiconductors is a ±5% tolerance Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 18 V nominal working voltage at 5 mA test current, 400 mW total power dissipation, and 25 Ω typical differential resistance at 5 mA - used for precision low-power voltage reference and overvoltage clamping in sensor signal conditioning circuits.
For engineers reviewing the BZX284-C18,115 datasheet, BZX284-C18,115 pinout, BZX284-C18,115 application, or BZX284-C18,115 equivalent, this part serves as a stable, surface-mount Zener solution where tight voltage regulation, low leakage (<50 nA at 0.7×VZ), and thermal stability (±14.4 mV/K tempco) are required in space-constrained industrial control modules.
Technical Context
The BZX284-C18,115 operates as a reverse-biased Zener diode with a nominal breakdown voltage of 17.6–18.4 V at IZ = 5 mA, exhibiting 25 Ω typical dynamic resistance and a positive temperature coefficient of +14.4 mV/K - enabling predictable voltage drift under thermal variation in feedback networks.
It is designed for DC voltage regulation and transient suppression in low-current analog subsystems, with validated performance up to 150 °C junction temperature and non-repetitive peak reverse surge capability of 1.5 A (100 μs pulse), while maintaining <50 nA reverse leakage at VR = 12.6 V (0.7×VZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 18 V at IZ = 5 mA - defines precise DC reference point for feedback loops or clamp thresholds. |
| Tolerance | ±5% - ensures VZ remains within 17.1–19.1 V across production lots for cost-sensitive regulation. |
| Differential Resistance (rdiff) | 25 Ω typical at 5 mA - determines output impedance and load regulation error in shunt regulator designs. |
| Power Dissipation (Ptot) | 400 mW at Tamb = 25 °C - sets maximum continuous power handling without derating on standard PCB. |
| Reverse Leakage (IR) | <50 nA at VR = 12.6 V - minimizes quiescent current loss in battery-powered or high-impedance bias networks. |
| Temperature Coefficient (SZ) | +14.4 mV/K - enables predictable VZ drift compensation in temperature-critical references. |
| Package | SOD110 ceramic SMD - provides hermetic reliability and low parasitic capacitance (93 pF at 0 V) for RF-adjacent analog stages. |
Pinout & Package
SOD110 is a 2-terminal ceramic surface-mount package with cathode marked by a band on one end; terminals are unidirectional anode/cathode with no internal connections beyond the Zener junction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated node; defines polarity for reverse-bias operation. |
| Cathode (banded end) | Zener breakdown terminal / voltage reference output | Connected to higher-potential rail; delivers stable 18 V reference when reverse-biased above knee voltage. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% voltage tolerance | Enables cost-optimized selection for non-critical regulation where 17.1–19.1 V range is acceptable. |
| 400 mW power rating | Supports sustained 22.2 mA Zener current at 18 V - sufficient for driving op-amp references or small logic bias networks. |
| Low 93 pF junction capacitance | Minimizes high-frequency loading in precision ADC reference buffers or RF detector circuits. |
| 150 °C max junction temperature | Allows operation in sealed industrial enclosures or near heat-generating components without thermal shutdown. |
| Ceramic SOD110 package | Delivers moisture resistance and long-term parameter stability superior to plastic SMD packages in humid environments. |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuitry |
|---|---|
|
Use Scenario: Stabilizing 18 V supply rail for analog front-end amplifiers in pressure transducers operating across −40 to +85 °C ambient. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference to maintain amplifier bias point within 1% accuracy despite input rail ripple. Use Value: 25 Ω rdiff and +14.4 mV/K tempco allow predictable calibration offset correction via software lookup tables. |
Use Scenario: Generating clean 18 V threshold for external reset supervisor IC monitoring 24 V system power in programmable logic controllers. IC Role / Device Role / Timing Role: Clamping device limiting supervisor input voltage during brown-out recovery transients. Use Value: 1.5 A non-repetitive surge rating absorbs 100 μs inductive kickback without degradation, ensuring reset integrity. |
| Low-Power Battery Monitoring | Optocoupler Bias Network |
|
Use Scenario: Dividing and regulating 36 V battery pack voltage to feed 18 V input of fuel gauge IC in portable test equipment. IC Role / Device Role / Timing Role: Precision Zener providing stable reference for resistive divider scaling. Use Value: <50 nA reverse leakage preserves battery life over multi-year deployments with minimal standby drain. |
Use Scenario: Biasing LED anode in linear optocoupler feedback loop for isolated DC-DC converter regulation. IC Role / Device Role / Timing Role: Current-setting element establishing fixed LED forward current via shunt regulation. Use Value: Tight 17.6–18.4 V VZ range ensures consistent LED drive across temperature, improving isolation gain stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-C18 | Same 18 V ±5%, but in SOD-123 package with 500 mW rating and higher 300 Ω rdiff. | Higher power margin but poorer regulation accuracy; suitable where surge robustness outweighs voltage stability. | Select BZT52-C18 only if board layout allows larger footprint and thermal mass supports 500 mW dissipation. |
| Vishay BZX84-C18 | Same 18 V ±5% in SOT-23, but with 250 mW rating, 40 Ω rdiff, and 100 nA leakage at 12.6 V. | Lower power and higher leakage limit use in ultra-low-power systems; SOT-23 offers easier rework than ceramic SOD110. | Choose BZX84-C18 when manual assembly or field repairability is prioritized over long-term hermetic reliability. |
Compared with BZX284-C18,115, the BZT52-C18 trades tighter regulation for higher surge tolerance, while the BZX84-C18 sacrifices leakage performance and power handling for assembly flexibility - making the BZX284-C18,115 optimal for hermetically sealed, thermally stable, low-leakage analog references.
Availability
BZX284-C18,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset supervision, and low-power battery monitoring requiring stable component supply with guaranteed long-term manufacturability.
Supply support for BZX284-C18,115 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The BZX284 series was developed to deliver high-stability, low-leakage Zener regulation in miniature ceramic packages for mission-critical analog subsystems in harsh environments.
FAQ
What is the nominal Zener voltage and test condition for BZX284-C18,115?
The BZX284-C18,115 has a nominal Zener voltage of 18 V measured at a test current of 5 mA, with a guaranteed range of 17.1 V to 19.1 V due to its ±5% tolerance. This specification is validated per NXP's 2002 product data sheet under Tj = 25 °C conditions and forms the basis for all downstream regulation accuracy calculations in circuit design.
What is the maximum continuous power dissipation for BZX284-C18,115?
The BZX284-C18,115 has a maximum total power dissipation of 400 mW at ambient temperature of 25 °C when mounted on a standard 11 × 25 × 1.6 mm PCB. Derating is required above 25 °C at 3.17 mW/°C based on its 315 K/W junction-to-ambient thermal resistance, limiting usable current in high-temperature environments.
Does BZX284-C18,115 have a specified reverse leakage current, and at what voltage?
Yes, the BZX284-C18,115 specifies reverse leakage current of less than 50 nA at VR = 12.6 V (0.7 × VZ nominal), per Table 1 in the NXP datasheet. This low leakage is critical for preserving battery life and minimizing error in high-impedance reference divider networks where even nanoamp-level currents cause measurable offset.
What is the differential resistance of BZX284-C18,115 and why does it matter?
The BZX284-C18,115 exhibits a typical differential resistance of 25 Ω at IZ = 5 mA. This value directly impacts load regulation: for every 1 mA change in Zener current, output voltage shifts by ~25 mV - making it essential for calculating stability margins in shunt regulator designs and selecting appropriate series resistors.
Which package type does BZX284-C18,115 use, and what are its key mechanical features?
The BZX284-C18,115 uses the SOD110 package - a very small ceramic rectangular surface-mount outline with dimensions 2.10 × 1.40 × 1.60 mm and cathode identified by a band. Its ceramic construction provides hermetic sealing, low moisture absorption, and superior long-term parameter stability compared to plastic SMD packages in humid or high-reliability applications.
BZX284-C18,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SOD-110
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-110
BZX284-C18,115 FAQ
1.How can I place an order for BZX284-C18,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX284-C18,115 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 BZX284-C18,115 reliable?
The price and inventory of BZX284-C18,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX284-C18,115 is usually 5 days.
3.What payment methods are accepted for BZX284-C18,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX284-C18,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX284-C18,115?
BZX284-C18,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX284-C18,115 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 BZX284-C18,115?
For technical support, including BZX284-C18,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX284-C18,115 requirements.
6.How does Aetrix verify that BZX284-C18,115 is sourced from the original manufacturer or authorized distributors?
All BZX284-C18,115 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 BZX284-C18,115 meets industry standards.
7.What is the process for return or replacement of BZX284-C18,115?
All BZX284-C18,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX284-C18,115, 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 BZX284-C18,115 part is unused and in its original packaging.
Return procedure for BZX284-C18,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX284-C18,115 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
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onsemi
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