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Vishay BZD27B4V3P-HM3_A08
- Part No.:
- BZD27B4V3P-HM3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B4V3P-HM3_A08.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,560
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Product details
Overview
BZD27B4V3P-HM3_A08 from Vishay Semiconductors is a surface-mount silicon planar Zener diode optimized for voltage regulation and transient overvoltage protection in automotive-grade power rails, with nominal Zener voltage 4.3 V (±2 %), 100 mA test current, 150 W peak surge power rating, and AEC-Q101 qualification for under-hood electronics.
For engineers reviewing the BZD27B4V3P-HM3_A08 datasheet, BZD27B4V3P-HM3_A08 pinout, BZD27B4V3P-HM3_A08 application, or BZD27B4V3P-HM3_A08 equivalent, this page delivers verified electrical parameters, thermal performance data, package dimensions, and validated alternative parts for automotive ECU, ADAS sensor supply, and infotainment system design.
Technical Context
This unidirectional Zener diode operates as a precision shunt regulator at low currents and transitions to robust clamping during transients, leveraging its 4.3 V nominal breakdown voltage and low dynamic resistance (7 Ω typ. at 100 mA). Its temperature coefficient of –0.12 to –0.02 %/°C ensures stable regulation across –65 °C to +175 °C operating range.
Designed for high-reliability automotive use, BZD27B4V3P-HM3_A08 features MSL Level 1 moisture sensitivity, JESD 201 Class 2 whisker resistance, and >8 kV HBM ESD immunity - all validated per AEC-Q101. The DO-219AB (SMF) package enables wave/reflow soldering with peak temperature up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.21 V min. / 4.3 V nom. / 4.39 V max. - tight ±2 % tolerance enables accurate 3.3 V or 5 V rail clamping without external feedback. |
| Test Current (IZT) | 100 mA - defines regulation point; supports stable operation in medium-current bias networks. |
| Dynamic Resistance (ZZ) | 7 Ω typical - low impedance improves regulation accuracy under load variation. |
| Peak Surge Power (PRSM) | 150 W (10/1000 μs waveform) - withstands ISO 7637-2 pulse 5a/b surges in 12 V vehicle systems. |
| Junction Temperature (TJ) | 175 °C max. - enables placement near hot components (e.g., power MOSFETs, DC-DC inductors) without derating. |
| Leakage Current (IR) | 25 μA max. at VR = 3.4 V - minimizes standby power loss in always-on circuits. |
| Thermal Resistance (RthJA) | 180 K/W on 3 mm × 3 mm Cu pad - informs PCB copper area requirements for thermal management. |
Pinout & Package
Package: DO-219AB (SMF), low-profile surface-mount case outline compatible with SOD-123W footprint; dimensions 2.7–2.9 mm × 1.7–1.9 mm × 0.8–1.2 mm; cathode marked by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal during reverse-bias conduction | Connected to ground or lower-potential node; forms shunt path for overvoltage energy dissipation. |
| Cathode | Current source terminal during reverse-bias conduction | Connected to protected rail (e.g., MCU VDD); clamps voltage when exceeds 4.3 V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - eliminates need for additional qualification testing. |
| MSL Level 1 rating | Zero floor life limitation; supports unlimited storage and standard reflow without baking. |
| 150 W surge capability | Handles repetitive load-dump transients per ISO 7637-2 without degradation - extends system reliability beyond basic TVS diodes. |
| Low leakage (25 μA) | Reduces quiescent current in battery-backed circuits - critical for extended key-off operation in telematics modules. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates (e.g., EU ELV, China RoHS) without compromising thermal or electrical performance. |
Applications
| Automotive Engine Control Unit (ECU) | ADAS Camera Power Supply |
|---|---|
Use Scenario: Protects 5 V microcontroller I/O and analog sensor interfaces from alternator load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Shunt regulator and transient voltage suppressor placed directly at MCU VDD pin. Use Value: Maintains regulated 4.3 V clamp during 150 W surges, preventing latch-up or reset events in ASIL-B compliant ECUs. | Use Scenario: Stabilizes 3.3 V image sensor supply against ignition noise and CAN bus coupling in rear-view camera modules. IC Role / Device Role / Timing Role: Low-leakage Zener reference and overvoltage clamp in LDO input stage. Use Value: 25 μA max. leakage preserves battery life during parking mode; ±2 % VZ ensures consistent sensor bias across temperature. |
| Infotainment System USB Port | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Guards USB VBUS line against ESD and hot-plug transients in head unit front-panel connectors. IC Role / Device Role / Timing Role: Primary ESD protection device with secondary regulation function. Use Value: >8 kV HBM ESD rating meets IEC 61000-4-2 Level 4; fast response clamps sub-10 ns transients before downstream USB PHY damage. | Use Scenario: Clamps gate-drive supply rail during MOSFET shoot-through events and motor regeneration spikes. IC Role / Device Role / Timing Role: Fast-response shunt clamp on 12 V auxiliary rail feeding half-bridge drivers. Use Value: 175 °C junction rating allows mounting on same heatsink as power stage; 150 W surge handles repeated PWM-induced transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation and surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZD27C4V3P-M3-08 | Same Zener voltage (4.3 V), ±5 % tolerance (vs. ±2 %), commercial grade (not AEC-Q101 qualified) | Lacks automotive qualification; suitable only for industrial or consumer power supplies | Select when cost sensitivity outweighs automotive reliability requirements and AEC-Q101 validation is not mandated. |
| SMBJ4.5A | TVS diode with 4.5 V standoff, 7.5 V clamping at 1 A, 600 W peak power - higher clamping voltage, no regulation function | Designed for transient suppression only; cannot replace BZD27B4V3P-HM3_A08 in precision regulation roles | Choose only for pure surge suppression where precise 4.3 V regulation is unnecessary and higher clamping voltage is acceptable. |
Compared with BZD27B4V3P-HM3_A08, BZD27C4V3P-M3-08 trades tighter voltage tolerance and automotive qualification for lower cost, while SMBJ4.5A offers higher surge capacity but lacks regulation capability - making BZD27B4V3P-HM3_A08 uniquely suited for dual-role automotive voltage reference and clamping.
Availability
BZD27B4V3P-HM3_A08 is available at Aetrix Electronics and suitable for automotive ECU design, ADAS camera modules, infotainment USB protection, and electric power steering systems requiring stable component supply with full AEC-Q101 traceability.
Supply support for BZD27B4V3P-HM3_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 automotive, industrial, and computing markets.
The BZD27B-M Series targets automotive voltage regulation and transient protection, engineered to meet AEC-Q101 stress tests and operate reliably at 175 °C junction temperature in harsh under-hood environments.
FAQ
What is the Zener voltage tolerance of BZD27B4V3P-HM3_A08?
BZD27B4V3P-HM3_A08 has a Zener voltage tolerance of ±2 %, specified as 4.21 V minimum to 4.39 V maximum at 100 mA test current. This tight tolerance ensures predictable clamping behavior in safety-critical automotive circuits where voltage margin is constrained, and it is confirmed in the Vishay BZD27B-M Series datasheet revision 1.6.
Is BZD27B4V3P-HM3_A08 qualified to AEC-Q101?
Yes, BZD27B4V3P-HM3_A08 is AEC-Q101 qualified, as indicated by the "-HM3" suffix per Vishay's ordering nomenclature. It passes all required stress tests including temperature cycling, high-temperature operating life, and ESD (HBM >8 kV), making it suitable for automotive applications such as engine control and ADAS subsystems.
What package type does BZD27B4V3P-HM3_A08 use?
BZD27B4V3P-HM3_A08 uses the DO-219AB (SMF) surface-mount package - a low-profile, halogen-free, RoHS-compliant case with dimensions 2.7–2.9 mm × 1.7–1.9 mm × 0.8–1.2 mm. Its footprint is compatible with SOD-123W layouts, and it supports reflow soldering up to 260 °C peak temperature.
What is the maximum surge power rating for BZD27B4V3P-HM3_A08?
BZD27B4V3P-HM3_A08 has a non-repetitive peak surge power rating of 150 W for a 10/1000 μs waveform, per IEC 61000-4-5. This rating is validated at TJ = 175 °C and enables reliable suppression of ISO 7637-2 Pulse 5a/b load-dump events in 12 V automotive systems without parameter shift.
Does BZD27B4V3P-HM3_A08 have a specified thermal resistance?
Yes, BZD27B4V3P-HM3_A08 has a junction-to-ambient thermal resistance (RthJA) of 180 K/W when mounted on an epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 μm thick. This value guides PCB layout decisions for thermal management in high-power transient scenarios.
BZD27B4V3P-HM3_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):
- 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-HM3_A08 FAQ
1.How can I place an order for BZD27B4V3P-HM3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B4V3P-HM3_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 BZD27B4V3P-HM3_A08 reliable?
The price and inventory of BZD27B4V3P-HM3_A08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27B4V3P-HM3_A08 is usually 5 days.
3.What payment methods are accepted for BZD27B4V3P-HM3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B4V3P-HM3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B4V3P-HM3_A08?
BZD27B4V3P-HM3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B4V3P-HM3_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 BZD27B4V3P-HM3_A08?
For technical support, including BZD27B4V3P-HM3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B4V3P-HM3_A08 requirements.
6.How does Aetrix verify that BZD27B4V3P-HM3_A08 is sourced from the original manufacturer or authorized distributors?
All BZD27B4V3P-HM3_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 BZD27B4V3P-HM3_A08 meets industry standards.
7.What is the process for return or replacement of BZD27B4V3P-HM3_A08?
All BZD27B4V3P-HM3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B4V3P-HM3_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 BZD27B4V3P-HM3_A08 part is unused and in its original packaging.
Return procedure for BZD27B4V3P-HM3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B4V3P-HM3_A08 Tags
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