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Vishay BZD27B12P-HE3_A08
- Part No.:
- BZD27B12P-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B12P-HE3_A08.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,353
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Product details
Overview
BZD27B12P-HE3_A08 from Vishay Semiconductors is an AEC-Q101 qualified, surface-mount silicon planar Zener diode optimized for overvoltage protection and voltage regulation in automotive and industrial power rails. It delivers a nominal Zener voltage of 12 V (±2 %), 50 mA test current, 150 W peak surge power rating (10/1000 μs), and operates across -65 °C to +175 °C junction temperature range.
For engineers reviewing the BZD27B12P-HE3_A08 datasheet, BZD27B12P-HE3_A08 pinout, BZD27B12P-HE3_A08 application, or BZD27B12P-HE3_A08 equivalent, key selection criteria include its 12 V clamping voltage at 8.8 A surge current, low dynamic resistance (9.1 Ω), ±0.05 to +0.1 %/°C temperature coefficient, and DO-219AB (SMF) package compatibility with high-reliability automotive PCB layouts.
Technical Context
This unidirectional Zener diode functions as a precision voltage reference and transient voltage suppressor in DC power networks. Its design integrates low leakage current (<5 μA at VR = 10 V), excellent long-term stability, and robust surge handling per IEC 60-1 (10/1000 μs waveform).
The device uses a silicon planar junction structure housed in a low-profile SMF (DO-219AB) package with MSL level 1 moisture sensitivity and JESD 201 Class 2 whisker resistance. It supports wave and reflow soldering with peak temperature up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.76 V min. to 12.24 V max. at 50 mA - ensures tight 12 V regulation tolerance (±2 %) for stable reference or clamp operation |
| Clamping Voltage (VC) | 16 V at IRSM = 8.8 A - defines maximum voltage seen by protected circuit during 10/1000 μs surge |
| Peak Surge Power (PRSM) | 150 W (10/1000 μs) - enables robust transient suppression in automotive load-dump and ISO 7637-2 pulse scenarios |
| Dynamic Resistance (ZZ) | 9.1 Ω max. at 50 mA - minimizes voltage deviation under varying current loads for precise regulation |
| Temperature Coefficient (αVZ) | +0.05 %/°C to +0.1 %/°C - provides predictable, positive drift for thermal compensation in wide-temperature designs |
| Junction Temperature (TJ) | 175 °C max. - supports operation in under-hood automotive environments and high-power industrial enclosures |
| Package | DO-219AB (SMF) - 2.7 × 3.5 mm footprint with 0.85 mm height, compatible with automated SMT assembly and high-density layouts |
Pinout & Package
DO-219AB (SMF) package: low-profile surface-mount case with cathode band marking; dimensions 2.7 mm × 3.5 mm × 0.85 mm; MSL level 1; RoHS-compliant; AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener mode | Provides path for forward conduction (VF ≤ 1.2 V @ 0.2 A); tied to ground or return in clamp configuration |
| Cathode | Current exit terminal in forward bias; Zener breakdown terminal in reverse bias | Connected to protected line (e.g., 12 V rail); defines clamping reference point and polarity-sensitive surge path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS power domains |
| 150 W peak surge rating (10/1000 μs) | Withstands ISO 7637-2 Pulse 5a (load dump) without degradation in automotive 12 V systems |
| ±2 % Zener voltage tolerance | Reduces need for post-production trimming and improves batch-to-batch consistency in safety-critical rails |
| MSL level 1, 260 °C reflow compatible | Eliminates bake requirements before SMT assembly, lowering manufacturing cost and cycle time |
| Low dynamic resistance (9.1 Ω) | Maintains tight voltage regulation under fast transient currents up to 8.8 A, minimizing overshoot |
Applications
| Automotive Power Rail Protection | Industrial Sensor Supply Regulation |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load-dump transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional Zener clamp placed between supply rail and ground to limit voltage excursions. Use Value: Clamps to 16 V at 8.8 A surge current, preventing damage to downstream MCU, CAN transceivers, and analog front-ends. | Use Scenario: Stabilizing 12 V auxiliary supply for pressure, temperature, and position sensors in factory automation. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant bias voltage despite input ripple and load variation. Use Value: Delivers ±2 % regulation with 9.1 Ω dynamic resistance, ensuring sensor output accuracy and ADC reference stability. |
| DC-DC Converter Feedback Reference | Overvoltage Detection in Battery Management |
Use Scenario: Providing accurate voltage reference for optocoupler feedback loop in isolated 12 V → 3.3 V flyback converters. IC Role / Device Role / Timing Role: Zener diode in secondary-side error amplifier reference leg, setting regulated output threshold. Use Value: Stable 12 V reference with +0.05 to +0.1 %/°C TC enables <±1 % output tolerance across -40 °C to +125 °C ambient. | Use Scenario: Monitoring cell stack voltage in 12 V lead-acid or LiFePO4 backup systems to trigger disconnect on overcharge. IC Role / Device Role / Timing Role: Standby-mode voltage monitor using Zener breakdown as threshold detector. Use Value: Low leakage (<5 μA at 10 V) minimizes quiescent drain; sharp 12 V knee enables reliable trip-point detection. |
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 (not Zener); higher clamping voltage (19.9 V), lower dynamic impedance, no regulation capability | Designed for high-energy ESD/surge suppression only; unsuitable for precision voltage reference use | Select when primary need is transient immunity, not DC regulation or stable reference |
| BZX84-C12 | SOT-23 package; 500 mW power rating; ±5 % tolerance; not AEC-Q101 qualified | Limited to low-power consumer or non-automotive industrial use; insufficient surge capacity for load-dump events | Select only for space-constrained, non-automotive, low-surge environments requiring basic regulation |
Compared with SMBJ12A and BZX84-C12, the BZD27B12P-HE3_A08 uniquely combines AEC-Q101 qualification, ±2 % Zener tolerance, 150 W surge rating, and DO-219AB packaging-making it the only option suitable for automotive-grade voltage regulation and coordinated overvoltage protection in single-device implementations.
Availability
BZD27B12P-HE3_A08 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor conditioning, and DC-DC converter feedback circuits requiring stable component supply, high reliability, and AEC-Q101 compliance.
Supply support for BZD27B12P-HE3_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 Series belongs to Vishay's eSMP® Zener portfolio, engineered specifically for high-surge, high-temperature automotive and industrial power-rail protection and regulation with AEC-Q101 qualification built-in.
FAQ
What is the Zener voltage tolerance of BZD27B12P-HE3_A08?
The BZD27B12P-HE3_A08 has a Zener voltage tolerance of ±2 %, with a specified range of 11.76 V to 12.24 V at 50 mA test current. This tight tolerance ensures consistent voltage regulation performance across production lots and operating conditions, critical for automotive and industrial applications where reference accuracy directly impacts system reliability. The BZD27B12P-HE3_A08 achieves this via precision silicon planar junction processing and AEC-Q101 validated screening.
Does BZD27B12P-HE3_A08 support reflow soldering?
Yes, BZD27B12P-HE3_A08 is fully compatible with standard lead-free reflow soldering processes, with a maximum peak temperature rating of 260 °C. It meets J-STD-020 MSL level 1 requirements, meaning it can be stored indefinitely at ambient conditions without baking prior to assembly. The DO-219AB (SMF) package is designed for both wave and reflow soldering, making the BZD27B12P-HE3_A08 suitable for high-volume automated manufacturing lines.
What is the clamping voltage of BZD27B12P-HE3_A08 during surge events?
The clamping voltage (VC) of BZD27B12P-HE3_A08 is 16 V at a peak surge current (IRSM) of 8.8 A under the 10/1000 μs waveform per IEC 60-1. This value defines the maximum voltage imposed on the protected circuit during transient events such as automotive load dump. The BZD27B12P-HE3_A08 maintains this clamping performance while delivering 150 W peak surge power dissipation, distinguishing it from standard Zeners with lower surge capability.
Is BZD27B12P-HE3_A08 qualified for automotive applications?
Yes, BZD27B12P-HE3_A08 is explicitly AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and ESD (HBM >8 kV, MM >800 V), and meets JESD 201 Class 2 whisker resistance. This qualification validates the BZD27B12P-HE3_A08 for use in automotive powertrain, chassis, and body electronics where long-term reliability under harsh environmental conditions is mandatory.
What package type does BZD27B12P-HE3_A08 use?
BZD27B12P-HE3_A08 uses the DO-219AB (SMF) surface-mount package: a low-profile, rectangular case measuring 2.7 mm × 3.5 mm × 0.85 mm with a cathode band marking. This package offers superior thermal performance (RthJA = 180 K/W on 3 mm × 3 mm Cu pads) and mechanical robustness compared to SOD-123 variants. The BZD27B12P-HE3_A08's SMF footprint supports high-density PCB layouts and automated optical inspection due to its defined orientation in carrier tape.
BZD27B12P-HE3_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):
- 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_A08 FAQ
1.How can I place an order for BZD27B12P-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B12P-HE3_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 BZD27B12P-HE3_A08 reliable?
The price and inventory of BZD27B12P-HE3_A08 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_A08 is usually 5 days.
3.What payment methods are accepted for BZD27B12P-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B12P-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B12P-HE3_A08?
BZD27B12P-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B12P-HE3_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 BZD27B12P-HE3_A08?
For technical support, including BZD27B12P-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B12P-HE3_A08 requirements.
6.How does Aetrix verify that BZD27B12P-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All BZD27B12P-HE3_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 BZD27B12P-HE3_A08 meets industry standards.
7.What is the process for return or replacement of BZD27B12P-HE3_A08?
All BZD27B12P-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B12P-HE3_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 BZD27B12P-HE3_A08 part is unused and in its original packaging.
Return procedure for BZD27B12P-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B12P-HE3_A08 Tags
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