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Vishay General Semiconductor - Diodes Division BZX584C18-HG3-08
- Part No.:
- BZX584C18-HG3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX584C18-HG3-08.pdf
- Description:
- DIODE ZENER 18V 200MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:23,970
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Product details
Overview
BZX584C18-HG3-08 from Vishay Semiconductors is a 18 V ±5 % Zener diode in SOD-523 package, rated for 200 mW power dissipation on FR-4 board, with 10 Ω dynamic resistance at 5 mA test current and -65 °C to +150 °C storage range. It serves as a precision voltage reference or overvoltage clamp in space-constrained automotive and industrial circuits.
For engineers reviewing the BZX584C18-HG3-08 datasheet, BZX584C18-HG3-08 pinout, BZX584C18-HG3-08 application, or BZX584C18-HG3-08 equivalent, key selection criteria include AEC-Q101 qualification, 0.7 × VZ,nom reverse leakage at 16.8 V, ±5 % VZ tolerance, thermal resistance of 600 K/W, and SOD-523 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a single-element silicon Zener diode optimized for stable voltage regulation under reverse bias. Its electrical behavior is defined at 5 mA test current (IZT1), with specified dynamic resistance (ZZ) ≤10 Ω and temperature coefficient αVZ = +8 to +9.5 × 10⁻⁴/°C - indicating positive drift above 12 V nominal range.
The BZX584C18-HG3-08 is manufactured in an AEC-Q101 qualified process and housed in UL 94 V-0 compliant molding compound. It features MSL level 1 moisture sensitivity and supports peak reflow temperatures up to 260 °C, making it suitable for automated surface-mount assembly in automotive-grade production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.8 V min., 18 V nom., 19.1 V max. at IZT = 5 mA - defines clamping threshold with ±5 % tolerance |
| Power Dissipation (Ptot) | 200 mW on FR-4 with recommended footprint - limits continuous energy handling in compact layouts |
| Dynamic Resistance (ZZ) | ≤10 Ω at IZT = 5 mA - ensures low impedance regulation for stable reference output |
| Reverse Leakage (IR) | ≤0.05 μA at VR = 16.8 V - minimizes standby current in battery-powered systems |
| Temperature Coefficient (αVZ) | +8 to +9.5 × 10⁻⁴/°C - indicates predictable positive VZ drift with junction temperature rise |
| Thermal Resistance (RthJA) | 600 K/W on FR-4 with recommended footprint - determines junction-to-ambient temperature rise per watt |
| Package | SOD-523 - 1.3 × 0.85 mm outline, 0.35 mm height, compatible with 0201-class pick-and-place |
Pinout & Package
SOD-523 package: cathode-marked, two-terminal surface-mount device with 0.35 mm pitch; total weight 1.32 mg; UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to circuit ground or lower potential node during Zener operation |
| Cathode | Zener breakdown terminal / high-side connection | Marked end; connected to voltage source or rail requiring regulation/clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| ±5 % Zener voltage tolerance | Enables tighter voltage margin control versus generic Zeners with ±10 % tolerance |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without dry-pack or baking requirements |
| Low dynamic resistance (≤10 Ω) | Reduces output voltage variation under load transients in feedback or reference paths |
| 0.7 × VZ,nom leakage limit | Guarantees sub-0.1 μA reverse current at 16.8 V, critical for ultra-low-power sensing nodes |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping on LIN bus transceiver supply rail subject to load dump transients. IC Role / Device Role / Timing Role: Zener diode providing overvoltage protection by shunting excess energy to ground when rail exceeds 19.1 V. Use Value: Prevents damage to 5 V LDOs and microcontrollers using only 0.85 mm² board area, enabled by AEC-Q101 reliability. | Use Scenario: Precision reference for 16-bit ADC in temperature transmitter with 4–20 mA loop power. IC Role / Device Role / Timing Role: Stable 18 V reference source for DAC-based excitation voltage generation. Use Value: Delivers <±0.1 % long-term stability via low tempco (+8.5 × 10⁻⁴/°C) and <10 Ω dynamic impedance. |
| Medical Wearable Battery Monitor | Smart Home Smoke Detector MCU Reset Circuit |
Use Scenario: Low-current voltage reference for fuel gauge IC monitoring Li-ion cell voltage during sleep mode. IC Role / Device Role / Timing Role: Zener diode operating at 1 μA leakage current to minimize quiescent drain while maintaining accuracy. Use Value: Achieves 0.05 μA max. reverse leakage at 16.8 V, extending battery life beyond 5 years in standby. | Use Scenario: Supervisory reset generator triggered by brown-out on 3.3 V MCU supply derived from 9 V alkaline battery. IC Role / Device Role / Timing Role: Zener-based comparator input reference set to 2.7 V via resistor divider from 18 V node. Use Value: Enables accurate 2.7 V reset threshold with ±5 % tolerance and negligible self-heating in SOD-523 package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C18-G3-08 | Same electrical specs but commercial grade (non-AEC-Q101 qualified); identical SOD-523 package and marking | Not approved for automotive use; suitable for consumer or industrial non-safety-critical designs | Select when AEC-Q101 compliance is not required and cost optimization is prioritized |
| MMBZ5245BS-7-F | 18 V Zener, SOT-323 package (2.1 × 1.3 mm), 350 mW Ptot, ±5 % tolerance, but no AEC-Q101 qualification | Larger footprint and higher power rating; lacks automotive qualification and MSL level 1 rating | Choose only if board space allows larger package and automotive qualification is unnecessary |
Compared with BZX584C18-G3-08 and MMBZ5245BS-7-F, the BZX584C18-HG3-08 uniquely combines AEC-Q101 qualification, SOD-523 miniaturization, and MSL level 1 handling - making it the sole option for space-constrained automotive modules requiring zero-bake assembly and certified reliability.
Availability
BZX584C18-HG3-08 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor signal conditioning, and medical wearable power management requiring stable component supply across extended product lifecycles.
Supply support for BZX584C18-HG3-08 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
Vishay Intertechnology is a global manufacturer of discrete semiconductors and passive components, founded in 1962 and headquartered in Malvern, PA.
The BZX584C-Series targets space-constrained, high-reliability applications where miniature Zener regulation is needed - especially in automotive, industrial, and portable electronics requiring AEC-Q101 validation and ultra-small footprints.
FAQ
What is the Zener voltage tolerance for BZX584C18-HG3-08?
The BZX584C18-HG3-08 has a Zener voltage tolerance of ±5 %, meaning its nominal 18 V rating spans 16.8 V to 19.1 V at 5 mA test current. This tight tolerance enables precise voltage clamping in automotive and industrial circuits where regulatory margins are constrained. The BZX584C18-HG3-08 achieves this specification under AEC-Q101 stress conditions, ensuring consistency across temperature and lifetime.
Is BZX584C18-HG3-08 qualified for automotive applications?
Yes, BZX584C18-HG3-08 is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including body control modules, lighting drivers, and sensor interfaces. The "HG3" suffix explicitly denotes AEC-Q101 qualification and RoHS compliance. This certification covers stress tests for temperature cycling, humidity, mechanical shock, and ESD - all validated per the BZX584C-Series qualification report. BZX584C18-HG3-08 meets these requirements in its native SOD-523 package.
What is the maximum power dissipation of BZX584C18-HG3-08 on a standard PCB?
The BZX584C18-HG3-08 is rated for 200 mW power dissipation when mounted on an FR-4 board using Vishay's recommended soldering footprint. With a 5 mm × 5 mm copper pad, its rating increases to 300 mW due to improved thermal conduction. The device's RthJA of 600 K/W (recommended layout) means a 120 °C junction-to-ambient rise occurs at full 200 mW - so derating is advised above 75 °C ambient. BZX584C18-HG3-08 must be applied within these thermal limits to ensure 150 °C maximum junction temperature.
Does BZX584C18-HG3-08 have moisture sensitivity limitations?
No, BZX584C18-HG3-08 carries MSL level 1 rating per J-STD-020, meaning it has unlimited floor life and may be placed directly into reflow without dry-packaging or baking. This is enabled by its SOD-523 package construction using UL 94 V-0 molding compound and controlled internal moisture content. The MSL level 1 classification applies specifically to the BZX584C18-HG3-08 variant and is verified in Vishay's qualification testing - simplifying manufacturing logistics for high-mix automotive lines.
What is the reverse leakage current specification for BZX584C18-HG3-08?
The BZX584C18-HG3-08 specifies a maximum reverse leakage current (IR) of 0.05 μA at VR = 16.8 V (0.7 × VZ,nom). This ultra-low leakage supports energy-sensitive applications like battery-backed sensors and wearables. Measured at 25 °C, the value remains below 0.1 μA across the full -65 °C to +150 °C storage range. This parameter is guaranteed for every BZX584C18-HG3-08 unit and forms part of its AEC-Q101 test suite.
BZX584C18-HG3-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- BZX584C
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.6 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX584C18-HG3-08 FAQ
1.How can I place an order for BZX584C18-HG3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX584C18-HG3-08 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 BZX584C18-HG3-08 reliable?
The price and inventory of BZX584C18-HG3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX584C18-HG3-08 is usually 5 days.
3.What payment methods are accepted for BZX584C18-HG3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX584C18-HG3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX584C18-HG3-08?
BZX584C18-HG3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX584C18-HG3-08 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 BZX584C18-HG3-08?
For technical support, including BZX584C18-HG3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX584C18-HG3-08 requirements.
6.How does Aetrix verify that BZX584C18-HG3-08 is sourced from the original manufacturer or authorized distributors?
All BZX584C18-HG3-08 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 BZX584C18-HG3-08 meets industry standards.
7.What is the process for return or replacement of BZX584C18-HG3-08?
All BZX584C18-HG3-08 units undergo pre-shipment inspection (PSI). If there is an issue with BZX584C18-HG3-08, 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 BZX584C18-HG3-08 part is unused and in its original packaging.
Return procedure for BZX584C18-HG3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX584C18-HG3-08 Tags
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MMBZ5240B-7-F
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