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Vishay General Semiconductor - Diodes Division SMB8J17CAHE3_A/I
- Part No.:
- SMB8J17CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17CAHE3_A/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,235
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Product details
Overview
SMB8J17CAHE3_A/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), 18.9–20.9 V breakdown range (VBR at 1 mA), 29.0 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps to ≤27.6 V at rated surge. It is AEC-Q101 qualified and used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J17CAHE3_A/I datasheet, SMB8J17CAHE3_A/I pinout, SMB8J17CAHE3_A/I application, or SMB8J17CAHE3_A/I equivalent, this device delivers verified bidirectional clamping performance, automotive-grade reliability, and surface-mount compatibility with automated assembly - critical for ESD/surge protection in CAN/LIN bus nodes, battery monitoring circuits, and automotive body control modules.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction, diverting surge current away from downstream ICs. Its bidirectional symmetry enables protection of AC-coupled or floating signal lines without polarity constraints.
It complies with ANSI/IEEE C62.35 for transient suppression, achieves 800 W peak pulse power (PPPM) at 10/1000 µs, and maintains <1.0 µA reverse leakage at 17 V (VWM). Thermal resistance is 72 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, supporting sustained operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected line. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | ≤27.6 V at 29.0 A - Clamping voltage under full-rated 10/1000 µs surge; determines maximum stress imposed on downstream circuitry. |
| PPPM | 800 W - Peak pulse power handling capability; validates robustness against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IPPM | 29.0 A - Peak surge current capacity at 10/1000 µs; directly supports design margin for 50 V/1 Ω source impedance transients. |
| TJmax | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments without derating. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals suitable for AC or floating-line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; surge current flows bidirectionally between them during overvoltage events. |
| Cathode band (absent) | Polarity indicator | Not present - confirms bidirectional construction; eliminates risk of incorrect orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential, AC, or ungrounded signal paths without external polarity management. |
| AEC-Q101 qualification | Validates long-term reliability under automotive thermal cycling, humidity, and vibration stresses - required for ECUs and ADAS sensors. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic and analog front-ends with tight absolute maximum ratings. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow soldering without moisture sensitivity concerns - eliminates pre-bake requirement in high-volume SMT lines. |
| Glass-passivated junction | Ensures stable VBR and low leakage over time and temperature - prevents parameter drift in harsh industrial environments. |
Applications
| Automotive LIN Bus Node | Industrial Analog Sensor Input |
|---|---|
|
Use Scenario: Protects LIN transceiver pins against load dump and inductive switching transients in vehicle door modules and seat controllers. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector interface, clamping surges before they reach the LIN PHY. Use Value: Maintains signal integrity below 27.6 V clamp level during 10/1000 µs pulses, preventing LIN frame corruption and transceiver latch-up. |
Use Scenario: Shields 4–20 mA current loop inputs in PLC analog input modules from field wiring surges and ESD events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across signal and return lines, absorbing common-mode and differential transients. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without additional series impedance or filtering. |
| Automotive Battery Monitoring Unit | Consumer Smart Meter Communication Port |
|
Use Scenario: Safeguards voltage-sense inputs of battery management ICs connected to 12 V/48 V vehicle batteries exposed to cranking spikes and alternator load dump. IC Role / Device Role / Timing Role: Primary overvoltage clamp at the BMS front-end, placed immediately after fuse and before precision resistive divider. Use Value: Withstands 800 W surges while maintaining ≤1.0 µA leakage at 17 V, preserving measurement accuracy and minimizing quiescent error. |
Use Scenario: Protects RS-485 transceiver pins in smart electricity meters against lightning-induced surges on utility-side communication lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair (A/B) and common-mode (GND) to suppress both differential and common-mode transients. Use Value: Delivers 29.0 A surge current handling and 27.6 V clamping - sufficient for IEC 61000-4-5 Level 3 (2 kV/12 Ω) immunity testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J17CAHM3_A/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and marking code. | No functional difference; selected where halogen-free compliance is mandated by OEM or regional environmental regulations. | Choose SMB8J17CAHM3_A/I when RoHS + halogen-free material declaration is contractually required. |
| SMBJ17CAHE3_A/I | Same VWM/VBR/VC specs but rated for 1000 W PPPM (unidirectional only); not bidirectional - lacks symmetrical clamping. | Only suitable for DC-biased or ground-referenced lines; cannot protect floating or AC-coupled signals without redesign. | Select SMBJ17CAHE3_A/I only if protecting unidirectional power rails and higher 1000 W surge margin is needed. |
Compared with SMB8J17CAHE3_A/I, SMB8J17CAHM3_A/I offers identical protection performance with halogen-free materials, while SMBJ17CAHE3_A/I trades bidirectionality for higher unidirectional power rating - requiring careful signal topology review before substitution.
Availability
SMB8J17CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and smart meter communication ports requiring stable component supply and AEC-Q101 assurance.
Supply support for SMB8J17CAHE3_A/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, MOSFETs, and protection devices with emphasis on reliability and application-specific validation.
The SMB8JxxCA family targets automotive and industrial transient suppression, engineered for AEC-Q101 compliance, high-power density, and seamless integration into automated SMT lines.
FAQ
What is the clamping voltage of SMB8J17CAHE3_A/I at its rated peak pulse current?
The SMB8J17CAHE3_A/I clamps to a maximum of 27.6 V when subjected to its rated 29.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured and guaranteed per Vishay's datasheet (Document Number 88422, page 3), ensuring predictable overvoltage limiting for protected circuits. The SMB8J17CAHE3_A/I maintains this clamping performance across its qualified temperature range and lifetime.
Is SMB8J17CAHE3_A/I suitable for protecting bidirectional communication lines like LIN or CAN?
Yes, SMB8J17CAHE3_A/I is explicitly designed for bidirectional protection and is commonly deployed on LIN bus nodes and other floating or AC-coupled signal lines. Its symmetrical structure provides identical clamping behavior in both directions, eliminating polarity concerns during layout or assembly. The SMB8J17CAHE3_A/I meets AEC-Q101 requirements, making it appropriate for automotive LIN physical layer protection per OEM specifications.
Does SMB8J17CAHE3_A/I require special PCB layout considerations?
Yes - optimal performance requires mounting SMB8J17CAHE3_A/I on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This pad area ensures adequate heat dissipation and sustains the rated 800 W peak pulse power. Smaller pads reduce thermal mass and may cause premature failure under repeated surges. The SMB8J17CAHE3_A/I also benefits from short, low-inductance traces to the protected node.
How does the AEC-Q101 qualification of SMB8J17CAHE3_A/I impact its use in industrial applications?
The AEC-Q101 qualification of SMB8J17CAHE3_A/I validates its robustness under accelerated stress conditions including high-temperature operating life, temperature cycling, and ESD - exceeding typical industrial requirements. While not mandatory for non-automotive use, this certification provides strong evidence of long-term reliability in demanding environments such as factory automation and outdoor metering. Engineers specify SMB8J17CAHE3_A/I in industrial designs to reduce field failure risk and simplify qualification efforts.
What is the reverse leakage current of SMB8J17CAHE3_A/I at its standoff voltage?
At its 17 V standoff voltage (VWM), the SMB8J17CAHE3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C, as confirmed in the bidirectional electrical characteristics table (page 3 of Document 88422). This low leakage preserves signal integrity and minimizes power loss in high-impedance sensing circuits. The SMB8J17CAHE3_A/I maintains this specification across its full operating temperature range (-55 °C to +150 °C).
SMB8J17CAHE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 29A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J17CAHE3_A/I FAQ
1.How can I place an order for SMB8J17CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17CAHE3_A/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_A/I reliable?
The price and inventory of SMB8J17CAHE3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J17CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17CAHE3_A/I?
SMB8J17CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17CAHE3_A/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_A/I?
For technical support, including SMB8J17CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J17CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J17CAHE3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J17CAHE3_A/I?
All SMB8J17CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17CAHE3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMB8J17CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J17CAHE3_A/I Tags
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