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Vishay BZD27B18P-HE3_A08
- Part No.:
- BZD27B18P-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B18P-HE3_A08.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
BZD27B18P-HE3_A08 from Vishay Semiconductors is a surface-mount silicon planar Zener diode rated for 18 V nominal breakdown voltage (±2 % tolerance), 25 mA test current, and 150 W non-repetitive peak surge power (10/1000 μs waveform), designed for overvoltage protection in automotive power rails and industrial DC supply lines.
For engineers reviewing the BZD27B18P-HE3_A08 datasheet, BZD27B18P-HE3_A08 pinout, BZD27B18P-HE3_A08 application, or BZD27B18P-HE3_A08 equivalent, key selection criteria include its AEC-Q101 qualification, 175 °C max junction temperature, low dynamic resistance (13 Ω typ. at 25 mA), and SOD-123W-compatible SMF (DO-219AB) package with MSL level 1 handling.
Technical Context
This unidirectional Zener diode operates as a voltage reference and transient suppressor in clamping configurations. It delivers stable regulation with ±2 % VZ tolerance and a positive temperature coefficient of +0.06 to +0.11 %/°C across its operating range.
Its surge capability is defined per IEC 60-1 (10/1000 μs pulse), with clamping voltage of 24.6 V at 5 A peak reverse current and reverse leakage ≤5 μA at 15 V. The device meets JESD 201 Class 2 whisker testing and supports wave/reflow soldering up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 17.64 V min. to 18.36 V max. at 25 mA - ensures tight regulation for 18 V rail protection |
| Surge Power | 150 W (10/1000 μs) - withstands high-energy transients per ISO 7637-2 |
| Clamping Voltage | 24.6 V at 5 A IRSM - defines maximum voltage seen by protected circuit during surge |
| Junction Temp | 175 °C max. - enables operation in under-hood automotive environments |
| Dynamic Resistance | 13 Ω typical at 25 mA - minimizes voltage shift under varying load current |
| Leakage Current | ≤5 μA at 15 V - reduces standby power loss in always-on systems |
| Temp Coefficient | +0.06 to +0.11 %/°C - predictable VZ drift over temperature for stable design margins |
Pinout & Package
The BZD27B18P-HE3_A08 uses the SMF (DO-219AB) low-profile surface-mount package, compatible with SOD-123W footprint, measuring 2.7 × 1.2 mm with 0.85 mm height and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward bias | Connected to lower-potential node in clamping configuration; VF ≤ 1.2 V at 0.2 A |
| Cathode | Zener breakdown terminal | Connected to protected line; reverse-biased to clamp overvoltage events above 18 V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| MSL Level 1 | Zero floor life limitation - can be stored indefinitely before reflow without baking |
| ESD robustness | HBM > 8 kV / MM > 800 V - survives handling and board-level ESD events |
| Low-profile SMF package | 0.85 mm height - enables compact layout in space-constrained modules |
| Surge-rated construction | Rated for 150 W (10/1000 μs) - exceeds standard TVS requirements for harsh environments |
Applications
| Automotive Power Rail Protection | Industrial DC Supply Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional Zener clamping diode placed between supply rail and ground. Use Value: Limits transient voltage to 24.6 V at 5 A, preventing damage to downstream 3.3 V/5 V regulators and microcontrollers. | Use Scenario: Safeguarding programmable logic controllers (PLCs) powered from 24 V industrial supplies. IC Role / Device Role / Timing Role: Standby overvoltage protector in parallel with bulk capacitance on main DC bus. Use Value: Maintains 18 V regulation with ±2 % tolerance and 13 Ω dynamic resistance, ensuring stable reference for analog monitoring circuits. |
| On-Board Charger Interface | Motor Drive Control Board |
Use Scenario: Input stage protection for bidirectional OBCs interfacing with 400 V EV battery systems. IC Role / Device Role / Timing Role: Secondary clamping element in multi-stage surge suppression network. Use Value: Provides fast response (<1 ns) and 150 W surge rating to absorb coupling-induced spikes without degradation. | Use Scenario: Gate driver supply rail stabilization in 3-phase inverter modules. IC Role / Device Role / Timing Role: Zener reference for isolated feedback or auxiliary bias generation. Use Value: Delivers stable 18 V reference with +0.06 to +0.11 %/°C TC, minimizing drift across -40 to +150 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | TVS diode with 18.8 V standoff, 28.8 V clamping at 10.4 A; higher surge rating (600 W) | Designed for fast transient suppression rather than precision regulation | Select when primary need is high-energy surge absorption, not tight voltage reference |
| BZX84-C18 | SOT-23 package; 18 V ±5 % tolerance; 300 mW power rating; no AEC-Q101 or surge spec | General-purpose regulation only; unsuitable for automotive or high-surge environments | Select only for cost-sensitive, non-automotive, low-power signal conditioning |
Compared with SMBJ18A and BZX84-C18, the BZD27B18P-HE3_A08 uniquely combines AEC-Q101 qualification, ±2 % VZ tolerance, 150 W surge rating, and SMF packaging-making it optimal for automotive-grade voltage clamping where precision, reliability, and ruggedness are jointly required.
Availability
BZD27B18P-HE3_A08 is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and motor control systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZD27B18P-HE3_A08 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial and automotive applications.
The BZD27B Series is part of Vishay's eSMP® Zener portfolio, engineered specifically for high-surge, high-temperature environments where AEC-Q101 compliance and tight voltage tolerance are mandatory.
FAQ
What is the Zener voltage tolerance for BZD27B18P-HE3_A08?
The BZD27B18P-HE3_A08 has a nominal Zener voltage of 18 V with a guaranteed tolerance of ±2 %, meaning the actual breakdown voltage falls between 17.64 V and 18.36 V when tested at 25 mA. This tight tolerance is confirmed in the Vishay datasheet revision 2.1 and applies specifically to the BZD27B18P-HE3_A08 variant, supporting precision voltage clamping in safety-critical automotive designs.
Is BZD27B18P-HE3_A08 qualified for automotive use?
Yes, BZD27B18P-HE3_A08 is AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It meets stress test requirements including high-temperature operating life, temperature cycling, and mechanical shock, and is rated for operation from -65 °C to +175 °C. This qualification makes BZD27B18P-HE3_A08 suitable for under-hood and powertrain applications where reliability is critical.
What package does BZD27B18P-HE3_A08 use, and is it RoHS-compliant?
BZD27B18P-HE3_A08 uses the SMF (DO-219AB) surface-mount package, which is compatible with SOD-123W footprints and features dimensions of 2.7 mm × 1.2 mm × 0.85 mm. It is RoHS-compliant and halogen-free, as confirmed by Vishay's material declarations and the "-HE3" designation indicating commercial-grade RoHS compliance with AEC-Q101 qualification.
What is the maximum clamping voltage of BZD27B18P-HE3_A08 during surge events?
The maximum clamping voltage (VC) of BZD27B18P-HE3_A08 is 24.6 V at a peak reverse surge current (IRSM) of 5 A, measured using the 10/1000 μs waveform per IEC 60-1. This value is specified in the Vishay BZD27B Series datasheet and reflects the upper voltage limit imposed on protected circuitry during standardized surge events, ensuring compatibility with 24 V system interfaces.
Does BZD27B18P-HE3_A08 support automated assembly processes?
Yes, BZD27B18P-HE3_A08 supports both wave and reflow soldering, with a maximum peak temperature of 260 °C compliant with J-STD-020 MSL Level 1. Its SMF package is tape-and-reel supplied (3000 units per 7″ reel), and the device passes JESD 201 Class 2 whisker testing-ensuring robust performance in high-volume SMT manufacturing without solder joint reliability concerns.
BZD27B18P-HE3_A08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- Package/Case:
- DO-219AB
- Series:
- BZD27B, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V (Max)
- Voltage - Breakdown (Min):
- 17.64V
- Voltage - Clamping (Max) @ Ipp:
- 24.6V
- Current - Peak Pulse (10/1000µs):
- 5.9A
- Power - Peak Pulse:
- 150W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
BZD27B18P-HE3_A08 FAQ
1.How can I place an order for BZD27B18P-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B18P-HE3_A08 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 BZD27B18P-HE3_A08 reliable?
The price and inventory of BZD27B18P-HE3_A08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27B18P-HE3_A08 is usually 5 days.
3.What payment methods are accepted for BZD27B18P-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B18P-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B18P-HE3_A08?
BZD27B18P-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B18P-HE3_A08 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 BZD27B18P-HE3_A08?
For technical support, including BZD27B18P-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B18P-HE3_A08 requirements.
6.How does Aetrix verify that BZD27B18P-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All BZD27B18P-HE3_A08 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 BZD27B18P-HE3_A08 meets industry standards.
7.What is the process for return or replacement of BZD27B18P-HE3_A08?
All BZD27B18P-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B18P-HE3_A08, 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 BZD27B18P-HE3_A08 part is unused and in its original packaging.
Return procedure for BZD27B18P-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B18P-HE3_A08 Tags
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