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Vishay General Semiconductor - Diodes Division SMBJ8.0AHE3/5B
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- Part No.:
- SMBJ8.0AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0AHE3/5B.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,504
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Product details
Overview
SMBJ8.0AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 1 mA, 13.6 V maximum clamping voltage (VC) at 44.1 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive control units.
For engineers reviewing the SMBJ8.0AHE3/5B datasheet, SMBJ8.0AHE3/5B pinout, SMBJ8.0AHE3/5B application, or SMBJ8.0AHE3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamping device in reverse-biased configuration, triggering when transient voltage exceeds its breakdown threshold (VBR). Its low incremental surge resistance and sub-nanosecond response time ensure effective suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
The SMBJ8.0AHE3/5B is rated for 600 W peak pulse power under 10/1000 µs waveform with 0.01 % duty cycle, derated above 25 °C per Fig. 2, and supports 100 A non-repetitive forward surge current (IFSM) for 8.3 ms half-sine wave - confirming robustness in high-energy transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working limit. |
| VBR min/max | 8.89 V / 9.83 V at IT = 1 mA - precise 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; determines protected circuit's maximum overvoltage exposure. |
| PPPM | 600 W - peak pulse power handling capability; defines energy absorption capacity for transient suppression. |
| ID @ VWM | 50 µA max - reverse leakage current at stand-off voltage; low value minimizes standby power loss and system drift. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive and industrial environments. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient; informs PCB copper pad design for thermal management. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when V > VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors. |
| 600 W peak pulse power | Handles high-energy transients from inductive switching and load dump without degradation. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles; no moisture sensitivity concerns pre-assembly. |
| Glass passivated junction | Enhances reliability and stability across temperature and humidity stress conditions. |
| UL 497B recognized | Meets Underwriters Laboratories requirements for telecom and industrial surge protection systems. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VCC and GND, absorbing >100 V spikes within nanoseconds. Use Value: Limits voltage seen by downstream LDOs and MCUs to ≤13.6 V, preventing latch-up or permanent damage per ISO 7637-2 Pulse 5a. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in PLC I/O modules from field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS on 4–20 mA or 0–10 V signal paths, triggered only during fault events. Use Value: Maintains signal integrity below 8.0 V during normal operation while clamping >1 kV ESD events to <13.6 V. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
|
Use Scenario: Front-end protection of Ethernet PHY power rails and bias lines in PoE-powered switches. IC Role / Device Role / Timing Role: Primary TVS on 3.3 V/5 V auxiliary rails, coordinated with upstream GDT or MOV for multi-stage clamping. Use Value: Withstands repeated 10/1000 µs surges up to 600 W, meeting GR-1089-CORE Level 3 telecom immunity requirements. |
Use Scenario: Input-side transient suppression on AC-DC adapter secondary-side outputs before USB-PD or QC controllers. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp limiting overvoltage to downstream USB port ICs during capacitor discharge events. Use Value: Enables compact layout with SMB footprint and eliminates need for larger DO-214AB alternatives while maintaining 13.6 V clamping ceiling. |
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-E3/5B | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and SMB package. | Suitable for non-automotive industrial or consumer designs where automotive qualification is not required. | Select when cost sensitivity outweighs automotive reliability validation needs. |
| SMBJ8.0CAHE3/5B | Bidirectional variant; symmetric VBR (8.89–9.83 V) in both polarities; same VC and PPPM ratings. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal may occur. | Choose only if bidirectional clamping is mandated by signal architecture - not a drop-in replacement. |
Compared with SMBJ8.0AHE3/5B, the SMBJ8.0A-E3/5B offers identical surge performance at lower qualification cost, while SMBJ8.0CAHE3/5B adds polarity symmetry at the expense of unidirectional optimization - making SMBJ8.0AHE3/5B the optimal choice for grounded DC rail protection in AEC-Q101-compliant systems.
Availability
SMBJ8.0AHE3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom line cards, and consumer power adapters requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMBJ8.0AHE3/5B 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, efficiency, and application-specific validation.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for robust clamping, low leakage, and seamless integration into automated SMT assembly lines.
FAQ
What is the clamping voltage of SMBJ8.0AHE3/5B at its rated peak pulse current?
The SMBJ8.0AHE3/5B has a maximum clamping voltage (VC) of 13.6 V at 44.1 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuits during surge events and is critical for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ8.0AHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBJ8.0AHE3/5B qualified for automotive applications?
Yes, SMBJ8.0AHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the 88392 datasheet. This qualification validates its reliability under automotive temperature cycling, humidity, mechanical shock, and lifetime surge endurance requirements - making it suitable for use in engine control units, body control modules, and ADAS sensor power domains.
What is the difference between SMBJ8.0AHE3/5B and SMBJ8.0A-E3/5B?
The core difference is qualification: SMBJ8.0AHE3/5B is AEC-Q101 qualified and RoHS-compliant, while SMBJ8.0A-E3/5B is RoHS-compliant but commercial-grade only. Electrically and physically identical - same VWM (8.0 V), VBR (8.89–9.83 V), VC (13.6 V), and SMB package - the HE3 version adds automotive reliability validation and extended temperature assurance for mission-critical deployments.
Can SMBJ8.0AHE3/5B be used in bidirectional signal protection?
No - SMBJ8.0AHE3/5B is unidirectional and must be installed with cathode toward the protected line and anode to ground. For bidirectional protection (e.g., RS-485, CAN, AC signals), the SMBJ8.0CAHE3/5B variant is required. Using SMBJ8.0AHE3/5B on bidirectional lines risks failure during negative transients, as it lacks reverse conduction capability beyond its specified breakdown threshold.
What PCB pad layout is recommended for optimal thermal performance of SMBJ8.0AHE3/5B?
Vishay specifies a minimum 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pad per terminal for SMBJ8.0AHE3/5B to achieve rated thermal resistance (RθJA = 100 °C/W). Larger or thermally connected copper areas further reduce junction temperature rise during repetitive surges. The device's MSL Level 1 rating allows standard lead-free reflow without pre-baking, provided pad geometry matches the DO-214AA outline in the datasheet.
SMBJ8.0AHE3/5B 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)
SMBJ8.0AHE3/5B FAQ
1.How can I place an order for SMBJ8.0AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0AHE3/5B 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 SMBJ8.0AHE3/5B reliable?
The price and inventory of SMBJ8.0AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ8.0AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0AHE3/5B?
SMBJ8.0AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0AHE3/5B 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 SMBJ8.0AHE3/5B?
For technical support, including SMBJ8.0AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0AHE3/5B requirements.
6.How does Aetrix verify that SMBJ8.0AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0AHE3/5B 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 SMBJ8.0AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ8.0AHE3/5B?
All SMBJ8.0AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0AHE3/5B, 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 SMBJ8.0AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ8.0AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0AHE3/5B Tags
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