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Vishay BZD27B9V1P-HE3_A18
- Part No.:
- BZD27B9V1P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B9V1P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,926
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Product details
Overview
BZD27B9V1P-HE3_A18 from Vishay Semiconductors is a surface-mount silicon planar Zener diode optimized for voltage regulation and transient overvoltage protection in automotive-grade power rails. It delivers a nominal Zener voltage of 9.1 V ±2 % at 50 mA test current, 150 W peak surge power (10/1000 μs), and operates across -65 °C to +175 °C. It is used in engine control unit (ECU) input protection circuits where AEC-Q101 qualification and high-temperature stability are required.
For engineers reviewing the BZD27B9V1P-HE3_A18 datasheet, BZD27B9V1P-HE3_A18 pinout, BZD27B9V1P-HE3_A18 application, or BZD27B9V1P-HE3_A18 equivalent, key selection criteria include its 9.1 V Zener voltage tolerance, 150 W non-repetitive surge rating, AEC-Q101 qualification status, SOD-123W-compatible SMF (DO-219AB) package, and temperature coefficient of +0.03 to +0.08 %/°C.
Technical Context
This device functions as a unidirectional, single-element Zener diode with precise voltage clamping behavior under reverse-bias conditions. Its electrical characteristics are specified at 25 °C ambient, with Zener voltage tested at IZT = 50 mA and dynamic resistance of 5 Ω (typ.) at that current.
The BZD27B9V1P-HE3_A18 features low leakage current (≤10 μA at VR = 7.5 V), clamps transients to ≤12.9 V at IRSM = 11.3 A (10/1000 μs), and maintains stable operation up to TJ = 175 °C - enabled by its MSL Level 1 moisture sensitivity rating and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.92–9.28 V at 50 mA - ensures tight regulation tolerance for 9 V rail stabilization |
| Surge Power (PRSM) | 150 W (10/1000 μs) - withstands automotive load-dump transients per ISO 7637-2 |
| Clamping Voltage (VC) | 12.9 V at 11.3 A - limits downstream IC voltage stress during ESD/surge events |
| Dynamic Resistance (ZZ) | 5 Ω (typ.) at 50 mA - minimizes voltage deviation under varying load currents |
| Temperature Coefficient (αVZ) | +0.03 to +0.08 %/°C - supports stable reference performance across wide automotive temperature range |
| Package | SMF (DO-219AB) - low-profile 2.7 × 3.9 mm SMD footprint compatible with SOD-123W layout |
| AEC-Q101 Qualified | Yes - validated for automotive applications including powertrain and body electronics |
Pinout & Package
SMF (DO-219AB) package: 2-terminal surface-mount device with cathode band marking; dimensions 2.7 mm × 3.9 mm × 1.08 mm; MSL Level 1, peak reflow temperature 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower-potential node in shunt regulation configuration |
| Cathode | Zener breakdown terminal / high-side connection | Connected to protected line; conducts when reverse voltage exceeds 9.1 V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including engine control, ADAS, and infotainment systems |
| 150 W surge rating (10/1000 μs) | Meets ISO 7637-2 pulse 5a requirements for 12 V vehicle systems |
| ±2 % VZ tolerance | Enables accurate voltage thresholding without external trimming components |
| Low dynamic resistance (5 Ω typ.) | Reduces output voltage variation under fast-changing load or transient conditions |
| MSL Level 1 handling | Allows unlimited floor life and standard reflow without baking preconditioning |
Applications
| Engine Control Unit (ECU) Input Protection | Automotive Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Protects microcontroller analog inputs and CAN transceiver power pins from load dump and jump-start surges in 12 V vehicle systems. IC Role / Device Role / Timing Role: Shunt-clamping Zener diode placed directly across protected rail and ground. Use Value: Limits voltage to ≤12.9 V during 11.3 A transients, preventing latch-up or permanent damage to 5 V/3.3 V logic. | Use Scenario: Stabilizes 9 V auxiliary supply feeding audio amplifiers and display controllers in head units. IC Role / Device Role / Timing Role: Precision voltage reference and overvoltage clamp in linear regulator feedback path. Use Value: Maintains ±2 % regulation accuracy across -40 °C to +125 °C ambient, reducing need for active compensation. |
| Body Control Module (BCM) Sensor Interface | ADAS Camera Module ESD Protection |
Use Scenario: Guards LIN bus transceivers and temperature/humidity sensor outputs against induced transients on wiring harnesses. IC Role / Device Role / Timing Role: Low-leakage (≤10 μA) Zener element providing bidirectional clamping via series resistor. Use Value: Prevents false triggering and signal corruption while adding <0.1 μA standby current penalty. | Use Scenario: Shields MIPI CSI-2 interface lines and image sensor bias rails from ESD events during assembly and field operation. IC Role / Device Role / Timing Role: Fast-response transient voltage suppressor placed adjacent to connector entry point. Use Value: Clamps 8 kV HBM ESD pulses within nanoseconds, preserving signal integrity of high-speed video links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Higher clamping voltage (12.6 V @ 10.3 A), larger SMB package (4.5 × 3.9 mm), 600 W surge rating | Better suited for primary-level surge suppression; less precise for regulation due to wider VBR tolerance (±5 %) | Select when higher energy handling is needed and board space allows larger footprint |
| BZX84-C9V1 | Smaller SOT-23 package, ±5 % VZ tolerance, 300 mW Ptot, no AEC-Q101 qualification | Limited to low-energy consumer applications; unsuitable for automotive under-hood environments | Choose only for cost-sensitive, non-automotive designs with relaxed reliability requirements |
Compared with SMBJ9.0A and BZX84-C9V1, the BZD27B9V1P-HE3_A18 uniquely balances automotive-grade reliability, tight 9.1 V regulation (±2 %), compact DO-219AB footprint, and 150 W surge capability - making it optimal for space-constrained, high-stability ECU and BCM protection nodes.
Availability
BZD27B9V1P-HE3_A18 is available at Aetrix Electronics and suitable for automotive power management, engine control unit (ECU) protection, and body electronics requiring stable component supply with full AEC-Q101 traceability.
Supply support for BZD27B9V1P-HE3_A18 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 automotive, industrial, and computing markets.
The BZD27B Series was developed specifically for AEC-Q101-compliant automotive voltage regulation and transient suppression, targeting under-hood and chassis-mounted modules operating up to 175 °C junction temperature.
FAQ
What is the Zener voltage tolerance of the BZD27B9V1P-HE3_A18?
The BZD27B9V1P-HE3_A18 has a Zener voltage range of 8.92 V to 9.28 V at 50 mA test current, corresponding to a ±2 % tolerance around the nominal 9.1 V value. This tight tolerance is confirmed in the Vishay datasheet (Document Number: 85921, Rev. 2.1) and enables precise voltage referencing without calibration. The BZD27B9V1P-HE3_A18 achieves this consistency through silicon planar process control and post-package screening.
Is the BZD27B9V1P-HE3_A18 qualified for automotive applications?
Yes, the BZD27B9V1P-HE3_A18 is AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It meets JESD201 Class 2 whisker testing, MSL Level 1 per J-STD-020, and supports operating temperatures from -65 °C to +175 °C. These qualifications make the BZD27B9V1P-HE3_A18 suitable for engine control, transmission, and ADAS modules where long-term reliability under thermal cycling is critical.
What is the maximum clamping voltage of the BZD27B9V1P-HE3_A18 during surge events?
The BZD27B9V1P-HE3_A18 clamps to a maximum of 12.9 V at a peak surge current of 11.3 A under the 10/1000 μs waveform condition. This value is specified in the "Electrical Characteristics" table (page 3) of the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during standardized automotive transients such as ISO 7637-2 Pulse 5a. The BZD27B9V1P-HE3_A18 achieves this with low dynamic impedance and stable thermal response.
Which package does the BZD27B9V1P-HE3_A18 use, and is it compatible with standard SMT processes?
The BZD27B9V1P-HE3_A18 uses the SMF (DO-219AB) package - a low-profile surface-mount outline measuring 2.7 mm × 3.9 mm × 1.08 mm. It is fully compatible with standard reflow soldering processes, rated for peak temperatures up to 260 °C, and classified as MSL Level 1, meaning it requires no dry-pack or baking prior to assembly. The BZD27B9V1P-HE3_A18 footprint aligns with SOD-123W land patterns, simplifying layout reuse.
How does the temperature coefficient affect the BZD27B9V1P-HE3_A18's performance in automotive environments?
The BZD27B9V1P-HE3_A18 exhibits a positive temperature coefficient of +0.03 %/°C to +0.08 %/°C, meaning its Zener voltage increases slightly with rising junction temperature. This behavior improves stability in high-temperature under-hood applications by counteracting typical semiconductor voltage drift. For example, at 150 °C junction temperature, the shift remains within ±0.8 % of nominal - well within system margin. The BZD27B9V1P-HE3_A18's coefficient is tightly controlled and documented in the datasheet's Electrical Characteristics table.
BZD27B9V1P-HE3_A18 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):
- 7.5V (Max)
- Voltage - Breakdown (Min):
- 8.92V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- 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)
BZD27B9V1P-HE3_A18 FAQ
1.How can I place an order for BZD27B9V1P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B9V1P-HE3_A18 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 BZD27B9V1P-HE3_A18 reliable?
The price and inventory of BZD27B9V1P-HE3_A18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27B9V1P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B9V1P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B9V1P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B9V1P-HE3_A18?
BZD27B9V1P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B9V1P-HE3_A18 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 BZD27B9V1P-HE3_A18?
For technical support, including BZD27B9V1P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B9V1P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B9V1P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B9V1P-HE3_A18 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 BZD27B9V1P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B9V1P-HE3_A18?
All BZD27B9V1P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B9V1P-HE3_A18, 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 BZD27B9V1P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B9V1P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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