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Vishay BZD27B12P-HE3_A18
- Part No.:
- BZD27B12P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B12P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,255
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Product details
Overview
BZD27B12P-HE3_A18 from Vishay Semiconductors is a surface-mount, AEC-Q101 qualified Zener diode with nominal breakdown voltage of 12 V (±2 %), 50 mA test current, 150 W peak surge power rating, and DO-219AB (SMF) package. It delivers stable voltage regulation and transient overvoltage protection in automotive power rails and industrial DC supply monitoring circuits.
For engineers reviewing the BZD27B12P-HE3_A18 datasheet, BZD27B12P-HE3_A18 pinout, BZD27B12P-HE3_A18 application, or BZD27B12P-HE3_A18 equivalent, key selection criteria include its ±2 % VZ tolerance, 8.8 V clamping voltage at 16 A surge, -65 °C to +175 °C operating range, and MSL level 1 reflow compatibility - all critical for high-reliability automotive ECU and ADAS sensor interface designs.
Technical Context
This unidirectional Zener diode operates in reverse-bias breakdown mode to regulate or clamp voltage. Its design integrates low dynamic impedance (9.1 Ω typical at 50 mA) and a positive temperature coefficient (+0.05 to +0.1 %/°C) for predictable thermal drift in series-regulated or overvoltage-protection configurations.
The device meets AEC-Q101 qualification for automotive use and supports wave and reflow soldering per J-STD-020 (peak 260 °C). Its 150 W non-repetitive peak surge power (10/1000 μs waveform) and 300 W (100 μs square pulse) enable robust transient suppression without derating in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ Nominal | 12 V ±2 % - ensures precise voltage reference within 240 mV tolerance for feedback loops and threshold detection |
| IZT | 50 mA - standard test current defining Zener voltage; aligns with typical biasing in low-power regulator circuits |
| VC @ IRSM | 16 V at 16 A - clamping voltage during 10/1000 μs surge, limiting downstream voltage stress in load-dump scenarios |
| PRSM | 150 W - peak surge power handling enables single-device protection against ISO 7637-2 Pulse 5a transients |
| TJ max | 175 °C - junction temperature rating supports operation in under-hood automotive environments without thermal shutdown |
| Package | DO-219AB (SMF) - 2.7 × 3.5 mm low-profile SMD footprint compatible with automated assembly and high-density routing |
| ESD Rating | HBM > 8 kV - withstands electrostatic discharge during handling and board-level integration without degradation |
Pinout & Package
DO-219AB (SMF) package: 2-terminal surface-mount device with cathode marked by band on top surface; dimensions 2.7 mm × 3.5 mm × 1.08 mm; MSL level 1, reflow-compatible up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Surge current return path | Connected to ground or low-impedance return in clamping configuration; carries full surge current during transient events |
| Cathode | Zener breakdown terminal / Voltage reference node | Connected to protected rail; defines regulated output voltage and serves as sensing point for feedback networks |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS modules per stress-test requirements |
| ±2 % VZ tolerance | Enables accurate voltage setting without external trimming; reduces calibration overhead in production test |
| 150 W peak surge power (10/1000 μs) | Meets ISO 7637-2 Pulse 5a immunity requirements for 12 V vehicle systems without external TVS stacking |
| MSL level 1 rating | Allows unlimited floor life and single-reflow processing without baking, simplifying manufacturing logistics |
| Low dynamic impedance (9.1 Ω) | Minimizes voltage deviation under varying load current, improving regulation stability in precision references |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver power inputs from load dump and jump-start transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional voltage clamp placed between VCC and ground, conducting only during overvoltage events above 12 V. Use Value: Limits rail voltage to ≤16 V during 150 W surges, preventing latch-up or permanent damage to downstream ICs without adding series resistance or delay. | Use Scenario: Stabilizing reference voltage for analog-to-digital conversion in industrial pressure and temperature sensors operating from unregulated 24 V DC supplies. IC Role / Device Role / Timing Role: Shunt regulator providing fixed 12 V reference to op-amp bias networks and ADC reference dividers. Use Value: Delivers ±2 % accuracy and <1 % thermal drift over -40 °C to +125 °C, enabling sub-12-bit measurement repeatability without active regulation. |
| DC-DC Converter Feedback Protection | Motor Drive Gate Driver Clamp |
Use Scenario: Safeguarding optocoupler or error amplifier inputs in isolated flyback converters subject to output overvoltage faults. IC Role / Device Role / Timing Role: Zener clamp across feedback resistor divider to prevent erroneous regulation signals during fault conditions. Use Value: Activates at 12 V with 9.1 Ω dynamic impedance, holding feedback node within safe input range of TL431 or similar comparators during sustained overvoltage. | Use Scenario: Clamping gate-source voltage spikes on N-channel MOSFETs in H-bridge motor drivers exposed to inductive kickback. IC Role / Device Role / Timing Role: Fast-response shunt device connected between gate and source to suppress VGS overshoot beyond 12 V rating. Use Value: Responds within nanoseconds to limit VGS to 12.24 V max, preventing gate oxide breakdown while maintaining drive integrity during PWM switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | TVS diode with 12.2 V standoff, 19.9 V clamping, 600 W peak power - higher clamping voltage, lower VBR tolerance (±5 %) | Designed for system-level ESD/surge protection rather than precision regulation; lacks tight VZ tolerance | Select when primary need is high-energy transient suppression, not stable voltage reference |
| BZX84-C12 | SOT-23 Zener with 12 V ±5 %, 300 mW PD, no AEC-Q101 qualification - smaller package but lower surge capability and thermal rating | Targeted at consumer-grade portable electronics; unsuitable for automotive under-hood or industrial high-temp environments | Select only for space-constrained, non-automotive applications where 150 W surge immunity is unnecessary |
Compared with SMBJ12A and BZX84-C12, the BZD27B12P-HE3_A18 uniquely combines AEC-Q101 qualification, ±2 % VZ tolerance, and 150 W surge rating in a thermally robust DO-219AB package - making it the only option suitable for automotive power rail regulation requiring both precision and ruggedness.
Availability
BZD27B12P-HE3_A18 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and DC-DC converter feedback networks requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for BZD27B12P-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 manufacturer of discrete semiconductors and passive components, specializing in high-reliability devices for automotive, industrial, and computing markets.
The BZD27B Series targets automotive-grade voltage regulation and transient protection, designed specifically to meet AEC-Q101 requirements while delivering tight Zener tolerance and high surge resilience in compact surface-mount packages.
FAQ
What is the Zener voltage tolerance for BZD27B12P-HE3_A18?
The BZD27B12P-HE3_A18 has a nominal Zener voltage of 12 V with a guaranteed tolerance of ±2 %, corresponding to a range of 11.76 V to 12.24 V at 50 mA test current. This tight tolerance is specified per the BZD27B Series datasheet Rev. 2.1 and enables precise voltage referencing in automotive and industrial feedback circuits without external calibration.
Is BZD27B12P-HE3_A18 qualified for automotive applications?
Yes, BZD27B12P-HE3_A18 is AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It meets the full stress-test requirements for automotive discrete semiconductors, including temperature cycling, humidity testing, and mechanical shock - making it suitable for under-hood and chassis-mounted electronic control units.
What is the maximum clamping voltage of BZD27B12P-HE3_A18 during surge events?
The BZD27B12P-HE3_A18 exhibits a maximum clamping voltage (VC) of 16 V at 16 A peak surge current (10/1000 μs waveform), per the Electrical Characteristics table on page 3 of the datasheet. This value defines the upper voltage limit imposed on protected circuits during standardized load-dump transients.
Which package does BZD27B12P-HE3_A18 use, and what are its key mechanical features?
BZD27B12P-HE3_A18 uses the DO-219AB (SMF) package: a low-profile surface-mount case measuring 2.7 mm × 3.5 mm × 1.08 mm with cathode identification via molded band. It complies with MSL level 1 per J-STD-020 and supports reflow soldering up to 260 °C peak temperature without preconditioning.
Does BZD27B12P-HE3_A18 have ESD protection capability?
Yes, BZD27B12P-HE3_A18 is rated for ESD immunity per AEC-Q101: human body model > 8 kV and machine model > 800 V. This ensures robustness against electrostatic discharge during handling, PCB assembly, and field operation in automotive and industrial environments.
BZD27B12P-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):
- 10V (Max)
- Voltage - Breakdown (Min):
- 11.76V
- Voltage - Clamping (Max) @ Ipp:
- 16V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- 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)
BZD27B12P-HE3_A18 FAQ
1.How can I place an order for BZD27B12P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B12P-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 BZD27B12P-HE3_A18 reliable?
The price and inventory of BZD27B12P-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 BZD27B12P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B12P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B12P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B12P-HE3_A18?
BZD27B12P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B12P-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 BZD27B12P-HE3_A18?
For technical support, including BZD27B12P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B12P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B12P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B12P-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 BZD27B12P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B12P-HE3_A18?
All BZD27B12P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B12P-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 BZD27B12P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B12P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B12P-HE3_A18 Tags
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