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Vishay General Semiconductor - Diodes Division SMB8J17CAHE3_B/I
- Part No.:
- SMB8J17CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17CAHE3_B/I.pdf
- Description:
- 800W,17V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,245
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Product details
Overview
SMB8J17CAHE3_B/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 17 V standoff voltage (VWM), 27.6 V clamping voltage (VC) at 29.0 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 SMB8J17CAHE3_B/I datasheet, SMB8J17CAHE3_B/I pinout, SMB8J17CAHE3_B/I application, or SMB8J17CAHE3_B/I equivalent, this device serves as an AEC-Q101-qualified, RoHS-compliant bidirectional TVS for robust ESD and lightning-induced transient suppression where low clamping voltage, fast response (<1 ns), and stable thermal performance up to +150 °C junction temperature are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping under repetitive transients.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, and its thermal resistance (RθJA = 72 °C/W, RθJL = 20 °C/W) enables reliable operation on standard 0.2" × 0.2" copper pads. AEC-Q101 qualification confirms suitability for automotive powertrain and body electronics environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line |
| VBR (min/max) | 18.9 V / 20.9 V at 1.0 mA - precise breakdown threshold ensuring predictable turn-on during overvoltage events |
| VC @ IPPM | 27.6 V at 29.0 A - clamping voltage limits downstream IC stress during 10/1000 µs surge; critical for MOSFET gate or MCU I/O survival |
| PPPM | 800 W - peak pulse power handling capability with 10/1000 µs waveform; validates protection against IEC 61000-4-5 Level 4 surges |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor circuits |
| TJ max. | +150 °C - extended junction temperature rating supports under-hood automotive and industrial ambient conditions |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly; 0.220" × 0.130" outline with matte tin leads |
Pinout & Package
SMB8J17CAHE3_B/I uses the standard SMB (DO-214AA) package: two-terminal, bidirectional configuration with no polarity marking (unlike unidirectional variants). The case is molded compound rated UL 94 V-0; terminals are matte tin-plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current bidirectionally when voltage exceeds ±VBR |
| Case (exposed cathode pad) | Thermal and mechanical anchor | Not electrically connected; provides thermal dissipation path to PCB copper and mechanical stability during reflow |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces requiring zero-failure reliability |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with 12 V/24 V systems |
| MSL Level 1 moisture sensitivity | Enables use without dry-pack or baking; supports standard SMT reflow at 260 °C peak temperature |
| Glass-passivated junction | Ensures long-term parameter stability and resistance to humidity-induced degradation in harsh environments |
| Halogen-free & RoHS-compliant (HE3 suffix) | Fulfills environmental compliance for global automotive OEMs and industrial equipment sold in EU/China markets |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Clamps transients to ≤27.6 V within nanoseconds, preventing latch-up or gate oxide damage in 5 V-tolerant transceivers and ADC front-ends. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage protector on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Withstands repeated 800 W surges without parameter drift, maintaining accuracy and longevity of precision op-amp and isolator stages. |
| USB Type-C Port Protection | Smart Meter Communication Line |
Use Scenario: Guarding USB 2.0 D+/D− lines and VBUS against ESD (IEC 61000-4-2 ±15 kV) and cable discharge events in portable diagnostic tools. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector to absorb sub-nanosecond ESD pulses before reaching USB PHY. Use Value: Sub-1 ns response time and <1.0 µA leakage preserve signal integrity and meet USB 2.0 eye diagram requirements at 480 Mbps. |
Use Scenario: Protecting RS-485/MBus communication lines in electricity meters from induced surges on long outdoor runs. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), clamping residual voltage to safe levels for isolated transceiver ICs. Use Value: 27.6 V clamping ensures transceiver survival under IEC 61000-4-5 2 kV surge tests while avoiding false triggering during normal 12 V bias 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 |
|---|---|---|---|
| SMBJ17CA-E3/52 | Unqualified for AEC-Q101; same VWM/VC/IPPM specs but commercial-grade only | Limited to non-automotive industrial or consumer use; not approved for automotive production | Select when AEC-Q101 is not mandated and cost optimization is prioritized |
| SMCJ17CAHE3_A/H | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VC | Better suited for higher-energy surges (e.g., 4 kV IEC 61000-4-5); requires larger PCB area | Choose when system-level surge testing exceeds 800 W requirements and board space permits SMC footprint |
Compared with SMBJ17CA-E3/52 and SMCJ17CAHE3_A/H, SMB8J17CAHE3_B/I uniquely balances AEC-Q101 compliance, SMB footprint constraints, and 800 W surge capability - making it optimal for space-constrained automotive modules where qualification and reliability are non-negotiable.
Availability
SMB8J17CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and smart meter communication line safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SMB8J17CAHE3_B/I 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, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMB8JxxCA family delivers high-power-density TVS solutions optimized for AEC-Q101-compliant automotive and industrial systems demanding robust, low-leakage, bidirectional surge protection in compact SMB packages.
FAQ
What does the "HE3_B/I" suffix mean in SMB8J17CAHE3_B/I?
The HE3 suffix indicates RoHS-compliant and AEC-Q101-qualified construction; "B" denotes revision level; "I" specifies packaging in 13-inch tape-and-reel format with 3200 units per reel. This full ordering code ensures traceability, automotive qualification, and automated assembly compatibility for SMB8J17CAHE3_B/I.
Is SMB8J17CAHE3_B/I unidirectional or bidirectional?
SMB8J17CAHE3_B/I is a bidirectional TVS diode, confirmed by its "CA" designation and symmetric electrical characteristics (VBR min/max identical for both polarities, no cathode band marking). It protects AC signals, differential buses, and floating nodes without polarity concerns - unlike unidirectional "A" variants such as SMB10J17A.
What is the clamping voltage of SMB8J17CAHE3_B/I under a standard 10/1000 µs surge?
The maximum clamping voltage (VC) of SMB8J17CAHE3_B/I is 27.6 V at 29.0 A peak pulse current (IPPM) with a 10/1000 µs waveform, as specified in the Vishay datasheet Document Number 88422. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured at TJ = 25 °C.
Can SMB8J17CAHE3_B/I replace SMBJ17CA in an existing design?
SMB8J17CAHE3_B/I can serve as a functional upgrade to SMBJ17CA where AEC-Q101 qualification and tighter parameter tolerances are required. Both share identical VWM (17 V), VC (27.6 V), and SMB package, but SMB8J17CAHE3_B/I adds automotive qualification and improved consistency - verify layout compatibility and reflow profile adherence before substitution.
What is the maximum operating temperature for SMB8J17CAHE3_B/I?
The maximum operating junction temperature (TJ max.) for SMB8J17CAHE3_B/I is +150 °C, per Vishay's datasheet. This rating enables deployment in under-hood automotive locations and high-ambient industrial enclosures, provided PCB thermal design maintains junction temperature below this limit using recommended 0.2" × 0.2" copper pads per terminal.
SMB8J17CAHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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)
SMB8J17CAHE3_B/I FAQ
1.How can I place an order for SMB8J17CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17CAHE3_B/I 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 SMB8J17CAHE3_B/I reliable?
The price and inventory of SMB8J17CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J17CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J17CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17CAHE3_B/I?
SMB8J17CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17CAHE3_B/I 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 SMB8J17CAHE3_B/I?
For technical support, including SMB8J17CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17CAHE3_B/I requirements.
6.How does Aetrix verify that SMB8J17CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J17CAHE3_B/I 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 SMB8J17CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J17CAHE3_B/I?
All SMB8J17CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17CAHE3_B/I, 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 SMB8J17CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMB8J17CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J17CAHE3_B/I Tags
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