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Vishay BZD27B4V3P-HE3_A18
- Part No.:
- BZD27B4V3P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B4V3P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,172
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Product details
Overview
BZD27B4V3P-HE3_A18 from Vishay Semiconductors is a surface-mount, AEC-Q101-qualified Zener diode with nominal 4.3 V breakdown voltage (±2 % tolerance), 100 mA test current, and 150 W peak surge power rating (10/1000 μs waveform). It operates across -65 °C to +175 °C and delivers low dynamic resistance (7 Ω typ.) for stable voltage regulation in automotive power rail protection circuits.
For engineers reviewing the BZD27B4V3P-HE3_A18 datasheet, BZD27B4V3P-HE3_A18 pinout, BZD27B4V3P-HE3_A18 application, or BZD27B4V3P-HE3_A18 equivalent, key selection criteria include its ±2 % VZ tolerance, 150 W surge capability, AEC-Q101 qualification, SOD-123W-compatible DO-219AB package, and -65 °C to +175 °C operating range.
Technical Context
This unidirectional Zener diode functions as a precision voltage reference and transient voltage suppressor in DC power rails. Its design integrates low leakage current (<1 μA at VR), tight 4.21–4.39 V breakdown range, and temperature coefficient of -0.12 to -0.02 %/°C for predictable thermal drift in automotive environments.
The device uses silicon planar construction and meets JESD201 Class 2 whisker testing and MSL Level 1 (260 °C peak reflow). It supports wave and reflow soldering and is rated for non-repetitive 300 W surge power (100 μs pulse) and 150 W (10/1000 μs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ nominal | 4.3 V - precise clamping threshold for 5 V rail stabilization |
| VZ tolerance | ±2 % - ensures consistent regulation across production batches |
| IZT | 100 mA - standard test current enabling accurate VZ measurement |
| PRSM | 150 W - peak surge power handling for 10/1000 μs transients per IEC 61000-4-5 |
| RthJA | 180 K/W - thermal resistance on 3 mm × 3 mm Cu PCB pad, defining derating above 30 °C ambient |
| TJ max | 175 °C - maximum junction temperature enabling under-hood operation |
| αVZ | -0.12 to -0.02 %/°C - low, negative tempco minimizing output drift over temperature |
Pinout & Package
Package: DO-219AB (SOD-123W-compatible), low-profile surface-mount case with cathode marking. Dimensions: 2.9 × 1.4 × 1.08 mm (L × W × H), footprint optimized for automated placement and reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward bias | Connected to lower-potential node; enables 1.2 V max forward drop at 0.2 A |
| Cathode | Zener breakdown terminal | Marked end; connected to higher-potential node for reverse-bias regulation/clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| MSL Level 1 rating | Zero bake requirement before reflow; compatible with standard SMT assembly lines |
| ESD robustness | HBM >8 kV / MM >800 V - withstands handling and board-level ESD events |
| Surge current specification | Defined 150 W (10/1000 μs) and 300 W (100 μs) ratings - enables reliable transient suppression without derating assumptions |
| Low dynamic resistance | 7 Ω typical at 100 mA - minimizes regulation error under load variation |
Applications
| Automotive Power Rail Protection | Industrial Sensor Supply Regulation |
|---|---|
Use Scenario: Protecting 5 V microcontroller supply lines against load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional Zener clamp absorbing transient energy while holding rail voltage below IC absolute maximum rating. Use Value: 150 W surge rating and -65 °C to +175 °C operation ensure reliability in under-hood environments without external TVS cascading. | Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining 4.3 V reference despite input ripple and temperature variation. Use Value: ±2 % VZ tolerance and -0.12 to -0.02 %/°C tempco deliver <±30 mV total drift over -40 to +125 °C sensor operating range. |
| DC-DC Converter Feedback Reference | Overvoltage Detection in Battery Management |
Use Scenario: Providing accurate feedback reference for isolated flyback converters powering infotainment head units. IC Role / Device Role / Timing Role: Shunt-connected Zener setting secondary-side regulation threshold via optocoupler feedback path. Use Value: Low 7 Ω dynamic resistance ensures minimal load-induced error on feedback node, improving output voltage accuracy to ±1.5 %. | Use Scenario: Detecting overvoltage conditions on 12 V lead-acid battery backup rails in telecom power supplies. IC Role / Device Role / Timing Role: Voltage threshold detector triggering shutdown when battery voltage exceeds safe limit. Use Value: Tight 4.21–4.39 V breakdown window enables detection margin of <0.2 V above nominal 4.3 V setpoint, reducing false trips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZD27C4V3P-HE3_A18 | ±5 % VZ tolerance vs. ±2 %; otherwise identical package, surge rating, and AEC-Q101 qualification | Acceptable where tighter regulation not required; lower cost tier | Select BZD27C4V3P-HE3_A18 only if system-level validation confirms ±5 % VZ meets overvoltage trip margin requirements |
| SMBJ4.3AHE3_A/H | TVS diode (not Zener); 4.3 V standoff, 6.3 V clamping at 1 A; 600 W peak power; DO-214AA package | Superior transient suppression but no precision regulation; larger footprint and higher clamping voltage | Choose SMBJ4.3AHE3_A/H when primary need is high-energy surge absorption rather than stable DC reference |
Compared with BZD27B4V3P-HE3_A18, the BZD27C4V3P-HE3_A18 trades regulation precision for cost, while the SMBJ4.3AHE3_A/H shifts from regulation to clamping with higher surge capacity but looser DC behavior and different form factor.
Availability
BZD27B4V3P-HE3_A18 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor regulation, DC-DC feedback referencing, and battery overvoltage detection requiring stable component supply across extended temperature ranges and AEC-Q101 compliance.
Supply support for BZD27B4V3P-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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and optoelectronics, with emphasis on reliability, automotive qualification, and high-power handling.
The BZD27B Series targets high-stability, high-surge Zener regulation in harsh-environment applications-specifically engineered for automotive power management and industrial control systems demanding AEC-Q101 compliance and extended temperature operation.
FAQ
What is the exact Zener voltage range for BZD27B4V3P-HE3_A18 at 25 °C?
The BZD27B4V3P-HE3_A18 has a guaranteed Zener voltage range of 4.21 V to 4.39 V at 100 mA test current and 25 °C ambient, per Vishay's Rev. 2.1 datasheet (Document Number: 85921). This ±2 % tolerance is measured under pulsed conditions (tp ≤ 5 ms) and defines the device's precision regulation window for design margining.
Is BZD27B4V3P-HE3_A18 qualified for automotive use?
Yes, BZD27B4V3P-HE3_A18 is explicitly AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It meets JESD201 Class 2 whisker testing, MSL Level 1, and ESD ratings (>8 kV HBM), making it suitable for under-hood and chassis-mounted automotive electronics per the Vishay BZD27B Series datasheet.
What package does BZD27B4V3P-HE3_A18 use, and is it compatible with standard SMT processes?
BZD27B4V3P-HE3_A18 uses the DO-219AB (SMF) package-identical in outline to SOD-123W-and is fully compatible with standard reflow and wave soldering. Its MSL Level 1 rating permits direct placement without baking, and the 260 °C peak reflow profile aligns with IPC-J-STD-020 requirements.
How does the temperature coefficient affect BZD27B4V3P-HE3_A18 performance across its operating range?
The BZD27B4V3P-HE3_A18 exhibits a temperature coefficient (αVZ) between -0.12 %/°C and -0.02 %/°C, meaning its Zener voltage decreases slightly with rising temperature. Over -40 °C to +125 °C, this results in a total VZ shift of approximately -35 mV to -10 mV-critical for applications requiring stable reference voltage across wide thermal excursions.
What is the maximum non-repetitive surge power rating for BZD27B4V3P-HE3_A18, and under what waveform?
BZD27B4V3P-HE3_A18 is rated for 300 W non-repetitive peak surge power under a 100 μs square pulse condition, and 150 W under the standardized 10/1000 μs double-exponential waveform per IEC 61000-4-5. These values are specified at TJ = 25 °C prior to surge and assume proper PCB thermal management per datasheet mounting conditions.
BZD27B4V3P-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):
- 4.21V
- 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)
BZD27B4V3P-HE3_A18 FAQ
1.How can I place an order for BZD27B4V3P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B4V3P-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 BZD27B4V3P-HE3_A18 reliable?
The price and inventory of BZD27B4V3P-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 BZD27B4V3P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B4V3P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B4V3P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B4V3P-HE3_A18?
BZD27B4V3P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B4V3P-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 BZD27B4V3P-HE3_A18?
For technical support, including BZD27B4V3P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B4V3P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B4V3P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B4V3P-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 BZD27B4V3P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B4V3P-HE3_A18?
All BZD27B4V3P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B4V3P-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 BZD27B4V3P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B4V3P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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