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Vishay General Semiconductor - Diodes Division SMB8J20CAHE3_B/H
- Part No.:
- SMB8J20CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J20CAHE3_B/H.pdf
- Description:
- 800W,20V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,151
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Product details
Overview
SMB8J20CAHE3_B/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on power and signal lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 32.4 V clamping voltage (VC) at 24.7 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J20CAHE3_B/H datasheet, SMB8J20CAHE3_B/H pinout, SMB8J20CAHE3_B/H application, or SMB8J20CAHE3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.62), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or floating lines without polarity constraints, and its thermal resistance (RθJL = 20 °C/W) supports sustained surge handling when mounted per recommended pad layout.
The SMB8J20CAHE3_B/H complies with ANSI/IEEE C62.35 for surge testing and meets AEC-Q101 stress requirements for automotive environments. Its 150 °C maximum junction temperature and -55 °C to +150 °C operating range allow deployment in under-hood ECUs and industrial motor drives where ambient temperatures exceed 105 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse working voltage before leakage exceeds 1 μA; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 22.2 V / 24.5 V at IT = 1 mA - Confirmed breakdown window ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 32.4 V at 24.7 A - Clamping voltage limits downstream IC stress during 10/1000 µs surge; VC/VWM = 1.62 indicates high efficiency. |
| PPPM | 800 W - Peak pulse power rating with 10/1000 µs waveform; validated on 5.0 mm × 5.0 mm copper pads per JEDEC standards. |
| TJ max. | +150 °C - Enables use in high-temperature automotive and industrial enclosures without derating penalties up to ambient 125 °C. |
| AEC-Q101 | Qualified - Certified for automotive applications including engine control, body electronics, and ADAS sensor modules. |
| Package | SMB (DO-214AA) - Low-profile surface-mount outline with 2.20 mm height; compatible with standard pick-and-place and reflow profiles (peak 260 °C). |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry path (bidirectional) | Accepts surge current in either polarity; symmetric conduction eliminates need for orientation during placement. |
| Cathode (Lead 2) | Transient current return path (bidirectional) | Completes low-impedance surge shunt loop; identical electrical behavior to Anode under reverse bias due to bidirectional structure. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity concerns - critical for CAN, LIN, and sensor bridge outputs. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock - required for Tier-1 ECU designs. |
| Low clamping ratio (VC/VWM) | 1.62 - Minimizes overvoltage exposure to protected ICs (e.g., microcontrollers, transceivers) during 8/20 µs or 10/1000 µs surges. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/85 % RH - eliminates bake requirements and supports just-in-time SMT assembly. |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1 μA at VWM) across temperature (-55 °C to +150 °C) and lifetime. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS shunts transient energy away from precision ADC inputs and op-amp buffers. Use Value: Maintains signal integrity under 100 V/100 ms load dump events while adding <0.5 pF capacitance - no bandwidth degradation. |
Use Scenario: Safeguarding RS-485 transceiver pins on PLC backplanes subjected to EFT bursts and lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response clamp limits line voltage to <33 V during 4 kV EFT, preventing latch-up in SN65HVD7x-series transceivers. Use Value: Survives >1000 surges at rated IPPM without parameter shift - extends field-replaceable module service life. |
| Consumer Power Adapter Input | Motor Drive Gate Driver Protection |
|
Use Scenario: Secondary-side DC bus protection in USB-C PD adapters against capacitor discharge transients and hot-plug spikes. IC Role / Device Role / Timing Role: Absorbs 800 W surges between VBUS and GND, shielding synchronous rectifier controllers and feedback optocouplers. Use Value: Replaces bulkier P6KE series with 30 % smaller footprint and identical PPPM - enables compact 28 mm × 28 mm adapter designs. |
Use Scenario: Shielding isolated gate driver outputs (e.g., Si823x) from Miller-induced voltage spikes during IGBT switching in HVAC inverters. IC Role / Device Role / Timing Role: Clamps gate-emitter voltage excursions to <33 V, preventing false turn-on and shoot-through failure modes. Use Value: Withstands repetitive 100 ns spikes at 200 kHz switching frequency - eliminates need for external RC snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA-E3/52 | Same SMB package, 800 W PPPM, but commercial-grade (non-AEC-Q101); VBR min/max = 22.2 V/24.5 V identical. | Lacks automotive qualification; suitable for industrial/commercial power supplies but not for vehicle-mounted systems. | Select when AEC-Q101 is not mandated and cost optimization is prioritized. |
| 1.5SMC20CA | Higher-power SMC package (1500 W PPPM), same VWM/VBR/VC specs; larger footprint (7.11 mm × 6.22 mm vs. SMB's 4.57 mm × 3.94 mm). | Used where higher single-pulse energy tolerance is needed (e.g., telecom central office equipment), but requires PCB redesign. | Choose only if surge energy exceeds 800 W or thermal dissipation demands larger copper area. |
Compared with SMBJ20CA-E3/52, SMB8J20CAHE3_B/H adds AEC-Q101 assurance for automotive use without sacrificing clamping performance; versus 1.5SMC20CA, it delivers identical protection in 45 % less board area but with lower absolute energy handling - ideal for space-constrained automotive modules.
Availability
SMB8J20CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, consumer power adapter inputs, and motor drive gate driver circuits requiring stable component supply across long production lifecycles.
Supply support for SMB8J20CAHE3_B/H 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8JxxCA family targets high-reliability transient suppression in automotive and industrial environments, engineered to meet AEC-Q101 and deliver consistent clamping behavior under thermal and electrical stress.
FAQ
What is the clamping voltage of SMB8J20CAHE3_B/H at its rated peak pulse current?
The SMB8J20CAHE3_B/H has a maximum clamping voltage (VC) of 32.4 V at 24.7 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions on 5.0 mm × 5.0 mm copper pads and reflects the actual voltage seen by protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMB8J20CAHE3_B/H suitable for automotive applications?
Yes, SMB8J20CAHE3_B/H is AEC-Q101 qualified and specifically designated for automotive use via the "HE3" suffix. It undergoes stress testing including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - making it appropriate for engine control units, body control modules, and ADAS sensor interfaces where reliability under harsh conditions is mandatory.
What does the "B/H" suffix in SMB8J20CAHE3_B/H indicate?
The "B/H" suffix in SMB8J20CAHE3_B/H denotes packaging configuration: "H" specifies 7″ diameter plastic tape and reel with 750 units per reel, while "B" indicates the revision level of the manufacturing process or test specification per Vishay's internal documentation. This ordering code ensures traceability and compliance with the AEC-Q101 qualification baseline used for the part.
How does SMB8J20CAHE3_B/H differ from unidirectional variants like SMB10J20A?
SMB8J20CAHE3_B/H is bidirectional with symmetrical clamping in both polarities, whereas SMB10J20A is unidirectional and conducts only in reverse bias. The SMB8J20CAHE3_B/H supports AC-coupled or floating lines (e.g., CAN bus, audio inputs), while SMB10J20A is suited for DC power rail protection where polarity is fixed - their VWM, VBR, and VC values are closely matched but conduction behavior differs fundamentally.
What is the thermal resistance from junction to lead (RθJL) for SMB8J20CAHE3_B/H?
The SMB8J20CAHE3_B/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, measured under standard mounting conditions. This low value enables efficient heat transfer from the silicon die to the PCB copper through the leads, supporting reliable operation during repetitive surge events and contributing to its ability to sustain 800 W peak pulse power without thermal runaway.
SMB8J20CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 20V
- Current - Peak Pulse (10/1000µs):
- 24.7A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J20CAHE3_B/H FAQ
1.How can I place an order for SMB8J20CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J20CAHE3_B/H 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 SMB8J20CAHE3_B/H reliable?
The price and inventory of SMB8J20CAHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J20CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J20CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J20CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J20CAHE3_B/H?
SMB8J20CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J20CAHE3_B/H 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 SMB8J20CAHE3_B/H?
For technical support, including SMB8J20CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J20CAHE3_B/H requirements.
6.How does Aetrix verify that SMB8J20CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J20CAHE3_B/H 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 SMB8J20CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J20CAHE3_B/H?
All SMB8J20CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J20CAHE3_B/H, 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 SMB8J20CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMB8J20CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J20CAHE3_B/H Tags
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