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Vishay General Semiconductor - Diodes Division SMBJ8.0AHE3/52
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- Part No.:
- SMBJ8.0AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0AHE3/52.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,093
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Product details
Overview
SMBJ8.0AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and ESD events on power and signal lines. It features 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 10 mA, 13.6 V maximum clamping voltage (VC) at 44.1 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMBJ8.0AHE3/52 datasheet, SMBJ8.0AHE3/52 pinout, SMBJ8.0AHE3/52 application, or SMBJ8.0AHE3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and real-world clamping behavior under surge conditions - all critical for robust overvoltage protection design.
Technical Context
The SMBJ8.0AHE3/52 operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for fast response (<1 ns) to transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling consistent clamping performance across repetitive 10/1000 µs surges at 0.01% duty cycle.
Designed for surface-mount assembly on 0.2" × 0.2" copper pads per terminal, it meets MSL Level 1 (JEDEC J-STD-020) with 260 °C peak reflow profile and complies with AEC-Q101 for automotive-grade reliability. The device exhibits a positive temperature coefficient of VBR (+0.069 %/°C), supporting predictable voltage drift under thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system supply rails. |
| VBR (min/max) | 8.89 V / 9.83 V at IT = 10 mA - Confirmed breakdown window ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 13.6 V at 44.1 A - Clamping voltage during 10/1000 µs surge defines worst-case stress on protected downstream circuitry. |
| PPPM | 600 W - Peak pulse power handling capacity determines survivability against lightning-induced or inductive-switching transients. |
| ID @ VWM | 50 µA max - Low leakage preserves efficiency in battery-powered or high-impedance sensing circuits. |
| TJ max. | +150 °C - Enables operation in under-hood automotive or industrial environments with elevated ambient temperatures. |
| RθJA | 100 °C/W - Thermal resistance informs PCB copper pad sizing and layout for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping. |
| Cathode | Reverse-biased terminal / Clamping node | Connected to protected line (e.g., 12 V rail or signal trace); voltage referenced to anode during transient suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without derating on standard PCB layouts. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces requiring long-term reliability. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs and ICs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing and inventory management. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage over temperature and lifetime, critical for mission-critical protection circuits. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppresses load-dump and jump-start transients on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes up to 35 V. Use Value: Limits peak voltage to ≤13.6 V during 44.1 A surge, preventing damage to LDO regulators and microcontrollers downstream. | Use Scenario: Shields analog output lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between signal line and ground to absorb ESD (IEC 61000-4-2 ±8 kV) and cable discharge events. Use Value: Sub-1 ns response and 50 µA leakage preserve signal integrity and measurement accuracy in 4–20 mA loops. |
| DC-DC Converter Input Protection | MOSFET Gate Driver Transient Suppression |
Use Scenario: Protects buck converter front-end from inductive kickback when upstream relay or fuse opens. IC Role / Device Role / Timing Role: TVS mounted directly at converter input pins to clamp transients before bulk capacitance. Use Value: 600 W rating handles repetitive 10/1000 µs surges common in motor drive power supplies without degradation. | Use Scenario: Prevents gate oxide rupture in high-side N-channel MOSFETs driven by isolated gate drivers. IC Role / Device Role / Timing Role: Unidirectional TVS tied between gate and source to clamp Miller-induced voltage spikes during switching. Use Value: 13.6 V clamping voltage stays well below typical 20 V gate-source max rating, ensuring safe operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A-E3/52 | Commercial-grade version; same VWM, VBR, VC, and PPPM; no AEC-Q101 qualification. | Lacks automotive qualification; suitable for consumer or industrial non-automotive use. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| SMBJ8.0CAHE3/52 | Bidirectional variant; identical VWM (8.0 V), but symmetric clamping in both polarities; ID doubled for VWM ≤10 V. | Required for AC-coupled or floating signal lines where polarity reversal may occur. | Choose only if bidirectional protection is needed; not a drop-in replacement due to polarity symmetry. |
Compared with SMBJ8.0AHE3/52, the E3 variant offers identical electrical performance without automotive qualification, while the CAHE3 variant provides bidirectional clamping at the expense of asymmetric surge handling - making SMBJ8.0AHE3/52 optimal for grounded DC rail protection where unidirectional clamping and AEC-Q101 compliance are mandatory.
Availability
SMBJ8.0AHE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, DC-DC converter inputs, and MOSFET gate driver protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMBJ8.0AHE3/52 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series is engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure resilience and long-term stability are non-negotiable.
FAQ
What is the clamping voltage of SMBJ8.0AHE3/52 and how is it measured?
The SMBJ8.0AHE3/52 has a maximum clamping voltage (VC) of 13.6 V, measured at a peak pulse current (IPPM) of 44.1 A using the standardized 10/1000 µs double-exponential waveform. This value represents the highest voltage the device allows across its terminals during a surge event, directly protecting downstream components from overvoltage stress. The test condition is defined in IEC 61000-4-5 and confirmed in Vishay's datasheet Figure 1 and Table on page 2.
Is SMBJ8.0AHE3/52 suitable for automotive applications?
Yes, SMBJ8.0AHE3/52 is AEC-Q101 qualified, as indicated by the "HE3" suffix, and is explicitly rated for automotive use in engine control units, body electronics, and ADAS sensor modules. Its construction includes glass-passivated junctions, MSL Level 1 reflow compatibility, and guaranteed operation from –55 °C to +150 °C junction temperature - all validated per AEC-Q101 stress test requirements.
What does the "HE3" suffix mean in SMBJ8.0AHE3/52?
The "HE3" suffix in SMBJ8.0AHE3/52 denotes a RoHS-compliant, AEC-Q101 qualified version with matte tin-plated leads meeting J-STD-002 and JESD 22-B102 solderability standards. It distinguishes this automotive-grade variant from commercial versions like SMBJ8.0A-E3/52 (no AEC-Q101) and confirms compliance with whisker testing (JESD 201 Class 2) and flammability (UL 94 V-0).
How does SMBJ8.0AHE3/52 differ from SMBJ8.0CAHE3/52?
SMBJ8.0AHE3/52 is unidirectional with cathode-band polarity, intended for DC rail protection where surge direction is known. SMBJ8.0CAHE3/52 is bidirectional, offering symmetrical clamping for AC or floating lines. Their VWM and VC values are identical, but the CA variant doubles the maximum reverse leakage (ID) limit per note (3) in the datasheet and lacks a polarity marker - making them functionally distinct and not interchangeable without circuit review.
What PCB layout guidance applies to SMBJ8.0AHE3/52 for optimal thermal performance?
For optimal thermal performance, SMBJ8.0AHE3/52 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet footnote (2) and Figure on page 5. This pad area achieves the published RθJA of 100 °C/W; smaller pads increase junction temperature and reduce surge endurance. Thermal vias under pads are recommended for high-reliability automotive designs.
SMBJ8.0AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 44.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ8.0AHE3/52 FAQ
1.How can I place an order for SMBJ8.0AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0AHE3/52 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 SMBJ8.0AHE3/52 reliable?
The price and inventory of SMBJ8.0AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ8.0AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0AHE3/52?
SMBJ8.0AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0AHE3/52 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 SMBJ8.0AHE3/52?
For technical support, including SMBJ8.0AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0AHE3/52 requirements.
6.How does Aetrix verify that SMBJ8.0AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0AHE3/52 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 SMBJ8.0AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ8.0AHE3/52?
All SMBJ8.0AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0AHE3/52, 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 SMBJ8.0AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ8.0AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0AHE3/52 Tags
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