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Vishay BZD27B4V7P-HE3_A18
- Part No.:
- BZD27B4V7P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B4V7P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,074
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Product details
Overview
BZD27B4V7P-HE3_A18 from Vishay Semiconductors is a silicon planar Zener diode optimized for precision voltage regulation and transient overvoltage protection in automotive-grade power rails. It delivers a nominal Zener voltage of 4.7 V ±2 % at 100 mA test current, features 150 W peak surge power (10/1000 μs), and operates across -65 °C to +175 °C - enabling use in engine control units and ADAS sensor power supplies.
For engineers reviewing the BZD27B4V7P-HE3_A18 datasheet, BZD27B4V7P-HE3_A18 pinout, BZD27B4V7P-HE3_A18 application, or BZD27B4V7P-HE3_A18 equivalent, key selection criteria include its AEC-Q101 qualification, low dynamic impedance (3 Ω typ. at 100 mA), temperature coefficient (-0.1 %/°C to 0 %/°C), and DO-219AB (SMF) package compatibility with high-density PCB layouts.
Technical Context
This unidirectional Zener diode operates in reverse-bias breakdown mode with tightly controlled voltage tolerance (±2 %) and low leakage (≤10 μA at VR = 3.76 V). Its thermal design supports junction temperatures up to 175 °C, enabled by RthJA = 180 K/W on 3 mm × 3 mm Cu pads and RthJL = 30 K/W for lead-mounted dissipation.
The device meets JESD201 Class 2 whisker resistance and sustains non-repetitive 150 W surge power per IEC 60-1 (10/1000 μs waveform), with clamping voltage VC = 7.5 V at IRSM = 13.3 A - confirming suitability for ISO 7637-2 pulse suppression in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.61 V min. / 4.7 V nom. / 4.79 V max. at IZT = 100 mA - ensures stable reference within ±2 % tolerance for feedback loops. |
| Dynamic Resistance (ZZ) | 3 Ω typ. at IZT = 100 mA - minimizes output voltage shift under load transients in regulator circuits. |
| Surge Power (PRSM) | 150 W (10/1000 μs) - provides robust protection against load dump and inductive switching spikes in automotive ECUs. |
| Junction Temperature (Tj) | 175 °C max. - enables operation in under-hood environments without derating in compact SMT layouts. |
| ESD Rating | >8 kV HBM / >800 V MM - supports handling and assembly in standard electronics manufacturing lines. |
| Package | DO-219AB (SMF) - 2.7 mm × 1.9 mm footprint with 0.85 mm height, compatible with automated reflow and wave soldering. |
| Leakage Current (IR) | ≤10 μA at VR = 3.76 V - reduces standby power loss in always-on vehicle subsystems. |
Pinout & Package
DO-219AB (SMF) surface-mount package: 2.7 mm × 1.9 mm body, 0.85 mm max height, cathode marked by band on top surface. Compatible with IPC-7351B SOIC-2 land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Surge current return path | Connected to system ground or low-side rail; carries full surge current during clamping events. |
| Cathode | Zener breakdown terminal / Voltage reference node | Connected to protected rail (e.g., 5 V microcontroller supply); defines regulated voltage level during reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors - eliminates need for additional qualification testing. |
| ±2 % VZ tolerance | Enables precise voltage regulation without external trimming, reducing BOM count in feedback networks for DC-DC converters. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak - simplifies SMT line integration without baking or dry pack requirements. |
| 150 W surge capability | Withstands ISO 7637-2 Pulse 1 (−150 V/2 Ω) and Pulse 3a (−200 V/50 Ω) without degradation - extends system reliability in 12 V battery networks. |
| Low temperature coefficient | αVZ = −0.1 %/°C to 0 %/°C - maintains voltage stability across −40 °C to +125 °C ambient range in engine bay deployments. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 5 V microcontroller I/O pins from load dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional voltage clamp placed between MCU pin and ground, conducting only during overvoltage events. Use Value: Limits pin voltage to ≤7.5 V at 13.3 A surge, preventing latch-up and permanent damage while maintaining AEC-Q100 compliance. |
Use Scenario: Safeguarding 24 V digital input channels against field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage suppressor at channel entry point, operating in parallel with optocoupler input stage. Use Value: Absorbs 150 W transient energy without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 Level 4 compliance. |
| Automotive Camera Module Power Rail | Medical Infusion Pump Sensor Supply |
Use Scenario: Stabilizing 3.3 V image sensor bias supply exposed to ignition noise and CAN bus coupling in rear-view cameras. IC Role / Device Role / Timing Role: Low-noise Zener reference shunt regulating sensor analog supply, filtering high-frequency ripple. Use Value: Delivers 4.7 V reference with 3 Ω dynamic impedance, reducing output ripple by >15 dB vs. standard Zeners in same footprint. |
Use Scenario: Providing fault-tolerant 5 V reference for pressure transducer signal conditioning in battery-powered infusion pumps. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring ADC reference stays within ±0.5 % despite battery voltage sag or ESD events. Use Value: Maintains ±2 % VZ accuracy from −20 °C to +70 °C, meeting IEC 60601-1-2 immunity requirements for Class BF equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52B4V7S | Same 4.7 V ±2 % rating but SOD-123 package; lower PRSM = 40 W (10/1000 μs); no AEC-Q101 qualification. | Suitable for commercial-grade consumer power supplies, not automotive under-hood use. | Select when cost sensitivity outweighs surge robustness and automotive qualification requirements. |
| ON Semiconductor 1SMA4732BT3G | DO-41 through-hole package; 4.7 V ±5 % tolerance; PRSM = 400 W but larger footprint (4.5 mm × 2.7 mm); no MSL Level 1 rating. | Used in legacy industrial power supplies where board space and reflow compatibility are secondary. | Choose only if through-hole assembly is mandated and thermal cycling stress is minimal. |
Compared with BZD27B4V7P-HE3_A18, the STMicro BZT52B4V7S offers lower cost but lacks automotive qualification and surge margin, while the ON Semi 1SMA4732BT3G trades surface-mount efficiency for higher surge rating and legacy compatibility - making BZD27B4V7P-HE3_A18 optimal for new AEC-Q101-compliant designs requiring compact, high-reliability clamping.
Availability
BZD27B4V7P-HE3_A18 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input protection, and medical sensor power regulation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZD27B4V7P-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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors for automotive, industrial, and computing markets.
The BZD27B Series targets high-reliability voltage regulation and transient suppression in harsh-environment applications, with design emphasis on AEC-Q101 compliance, surge resilience, and thermal stability.
FAQ
What is the Zener voltage tolerance of the BZD27B4V7P-HE3_A18?
The BZD27B4V7P-HE3_A18 has a Zener voltage tolerance of ±2 %, specified as 4.61 V minimum to 4.79 V maximum at 100 mA test current (IZT). This tight tolerance is confirmed in the Vishay BZD27B Series datasheet Rev. 2.1, Table on page 2, and supports precision regulation without external calibration. The BZD27B4V7P-HE3_A18 achieves this via silicon planar process control and 100 % parametric screening.
Is the BZD27B4V7P-HE3_A18 qualified for automotive applications?
Yes, the BZD27B4V7P-HE3_A18 is AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code and explicitly stated in the Vishay datasheet section "FEATURES". It meets JESD201 Class 2 whisker testing, MSL Level 1 per J-STD-020, and ESD ratings >8 kV HBM - all required for automotive under-hood and chassis-mounted electronics. The BZD27B4V7P-HE3_A18 is rated for operation from −65 °C to +175 °C junction temperature.
What is the maximum surge power rating for the BZD27B4V7P-HE3_A18?
The BZD27B4V7P-HE3_A18 has a non-repetitive peak surge power rating of 150 W for a 10/1000 μs waveform, per IEC 60-1, as documented in the Absolute Maximum Ratings table (page 2) and Electrical Characteristics table (page 3) of the Vishay datasheet. This value is validated with TJ = 25 °C prior to surge and supports compliance with ISO 7637-2 Pulse 1 and Pulse 3a test profiles in 12 V automotive systems.
Which package does the BZD27B4V7P-HE3_A18 use?
The BZD27B4V7P-HE3_A18 uses the DO-219AB (SMF) package - a low-profile surface-mount outline measuring 2.7 mm × 1.9 mm with 0.85 mm maximum height. Package dimensions and footprint recommendations are provided in Figure on page 5 of the Vishay datasheet. The BZD27B4V7P-HE3_A18 is compatible with SOD-123W, SOD-123F, and SOD-123FL land patterns per Vishay's compatibility note.
What is the clamping voltage of the BZD27B4V7P-HE3_A18 during surge events?
The clamping voltage (VC) of the BZD27B4V7P-HE3_A18 is 7.5 V at IRSM = 13.3 A for a 10/1000 μs surge, as specified in the Electrical Characteristics table (page 3) of the Vishay datasheet. This value reflects the maximum voltage seen at the cathode during standardized transient suppression and confirms effective protection for 5 V logic interfaces. The BZD27B4V7P-HE3_A18 maintains this clamping performance across its full operating temperature range.
BZD27B4V7P-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):
- 1V (Max)
- Voltage - Breakdown (Min):
- 4.61V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- 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)
BZD27B4V7P-HE3_A18 FAQ
1.How can I place an order for BZD27B4V7P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B4V7P-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 BZD27B4V7P-HE3_A18 reliable?
The price and inventory of BZD27B4V7P-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 BZD27B4V7P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B4V7P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B4V7P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B4V7P-HE3_A18?
BZD27B4V7P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B4V7P-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 BZD27B4V7P-HE3_A18?
For technical support, including BZD27B4V7P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B4V7P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B4V7P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B4V7P-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 BZD27B4V7P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B4V7P-HE3_A18?
All BZD27B4V7P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B4V7P-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 BZD27B4V7P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B4V7P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B4V7P-HE3_A18 Tags
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