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Vishay General Semiconductor - Diodes Division SMBJ8.5CAHE3_A/I
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- Part No.:
- SMBJ8.5CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.5CAHE3_A/I.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,343
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Product details
Overview
SMBJ8.5CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V maximum clamping voltage (VC) at 41.7 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ8.5CAHE3_A/I datasheet, SMBJ8.5CAHE3_A/I pinout, SMBJ8.5CAHE3_A/I application, or SMBJ8.5CAHE3_A/I equivalent, this part is evaluated for bidirectional surge protection in DC power rails, low-voltage data lines, and AEC-Q101-compliant automotive subsystems where low-leakage (<20 µA at VWM) and fast response (<1 ns) are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM specifications in either direction. Its glass-passivated junction ensures stable leakage and robust surge handling under repetitive transients.
The device complies with AEC-Q101 for automotive use and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Thermal resistance is RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable operation up to TJ = +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below circuit operating voltage. |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - Confirmed breakdown threshold range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 14.4 V at 41.7 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; defines worst-case stress on downstream components. |
| PPPM | 600 W - Peak pulse power dissipation capability with 10/1000 µs waveform; supports high-energy ESD and lightning-induced surges. |
| ID @ VWM | <20 µA - Low reverse leakage at stand-off voltage, minimizing standby power loss and signal distortion in sensitive analog paths. |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood or enclosed industrial environments without derating. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated SMT placement and reflow. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration with no polarity marking; symmetrical terminals function as interchangeable anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity required in layout. |
| Terminal 2 | Anode / Cathode (bidirectional) | Complementary terminal completing the symmetrical clamping path; enables single-device protection of AC or floating DC lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating DC signal lines without external polarity management. |
| AEC-Q101 qualification | Validated for automotive subsystems including infotainment power rails and body control module sensor interfaces. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) and ISO 7637-2 Pulse 1/2a/3a when properly laid out with minimum copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake requirements prior to assembly. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., temperature, pressure) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pairs or supply-to-ground, responding within <1 ns to limit transient excursions. Use Value: Prevents permanent damage to 3.3 V/5 V transceivers and ADC front-ends while maintaining signal integrity due to low capacitance (<100 pF at 0 V). |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff-connected TVS between input line and common ground, absorbing repetitive 600 W pulses without degradation. Use Value: Extends mean time between failures (MTBF) by eliminating false triggering and component burnout in harsh factory environments. |
| Telecom Power Rail Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Clamping 48 V phantom power rails in VoIP phones and base stations exposed to lightning-induced surges on Ethernet or telephone lines. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at board edge, coordinated with upstream fuses and downstream filtering. Use Value: Limits rail collapse to ≤14.4 V during 41.7 A transients, preventing brownout resets and preserving PoE controller functionality. |
Use Scenario: Protecting USB 2.0 D+/D− lines and VBUS against human-body-model (HBM) and IEC 61000-4-2 contact discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to connector, shunting ESD current before it reaches PHY IC. Use Value: Maintains signal rise/fall times <1 ns and insertion loss <0.5 dB up to 480 MHz, meeting USB IF compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA-E3/52 | Commercial-grade RoHS-compliant version; lacks AEC-Q101 qualification and uses different tape-and-reel packaging (7″ reel, 750 pcs). | Approved for non-automotive industrial and consumer applications only; not suitable for automotive Tier-1 BOMs requiring qualified parts. | Select SMBJ8.5CAHE3_A/I when AEC-Q101 compliance, halogen-free construction, and 13″ reel volume packaging are mandatory. |
| SMCJ8.5CAHE3_A/I | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass (RθJA = 50 °C/W) and 1500 W PPPM. | Used where higher surge energy absorption is needed or PCB layout allows larger footprint; not drop-in compatible due to different pad dimensions. | Choose SMBJ8.5CAHE3_A/I for space-constrained designs requiring 600 W protection in minimal area (SMB vs. SMC). |
Compared with SMBJ8.5CA-E3/52, SMBJ8.5CAHE3_A/I adds automotive qualification and halogen-free materials; compared with SMCJ8.5CAHE3_A/I, it trades surge capacity for compactness-making SMBJ8.5CAHE3_A/I optimal for cost-sensitive, size-limited AEC-Q101 designs.
Availability
SMBJ8.5CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, telecom infrastructure, and consumer USB interface protection requiring stable component supply and full traceability.
Supply support for SMBJ8.5CAHE3_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, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SMBJ series targets high-volume, space-constrained surge protection applications across automotive, industrial, and communications markets, balancing performance, qualification, and manufacturability in surface-mount packages.
FAQ
What is the clamping voltage of SMBJ8.5CAHE3_A/I at its rated peak pulse current?
The SMBJ8.5CAHE3_A/I has a maximum clamping voltage (VC) of 14.4 V at its rated peak pulse current (IPPM) of 41.7 A, measured using the standardized 10/1000 µs double-exponential waveform. This value represents the upper voltage limit imposed on protected circuitry during a full-power transient event and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2. The SMBJ8.5CAHE3_A/I maintains this clamping performance bidirectionally.
Is SMBJ8.5CAHE3_A/I suitable for automotive applications?
Yes, SMBJ8.5CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use, as indicated by the "HE3" suffix and documentation in the Vishay datasheet. It supports under-hood and cabin applications including sensor interfaces, infotainment power rails, and body control modules. The SMBJ8.5CAHE3_A/I also meets MSL Level 1 and offers halogen-free, RoHS-compliant construction required by Tier-1 automotive suppliers.
How does the bidirectional design of SMBJ8.5CAHE3_A/I affect PCB layout?
The SMBJ8.5CAHE3_A/I has no polarity marking and functions identically in either orientation, simplifying PCB layout by eliminating cathode/anode routing constraints. Engineers can place the SMBJ8.5CAHE3_A/I across any two nodes requiring symmetrical overvoltage protection - such as differential signal lines, AC-coupled paths, or floating DC supplies - without verifying orientation during assembly or design review.
What is the maximum reverse leakage current for SMBJ8.5CAHE3_A/I at its stand-off voltage?
At its 8.5 V stand-off voltage (VWM), the SMBJ8.5CAHE3_A/I exhibits a maximum reverse leakage current (ID) of 20 µA at TA = 25 °C, per the Vishay datasheet table on page 2. This low leakage ensures minimal impact on battery-powered or high-impedance sensor circuits, and remains stable across its full operating temperature range of –55 °C to +150 °C.
Does SMBJ8.5CAHE3_A/I require special handling or baking before reflow soldering?
No, SMBJ8.5CAHE3_A/I is rated MSL Level 1 per J-STD-020 and may be stored indefinitely at ambient conditions without moisture sensitivity concerns. It supports standard lead-free reflow profiles with a maximum peak temperature of 260 °C, and no pre-bake is required - unlike higher-MSL components. This simplifies manufacturing flow and reduces process risk for the SMBJ8.5CAHE3_A/I in high-volume SMT lines.
SMBJ8.5CAHE3_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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- 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)
SMBJ8.5CAHE3_A/I FAQ
1.How can I place an order for SMBJ8.5CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.5CAHE3_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 SMBJ8.5CAHE3_A/I reliable?
The price and inventory of SMBJ8.5CAHE3_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 SMBJ8.5CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ8.5CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.5CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.5CAHE3_A/I?
SMBJ8.5CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.5CAHE3_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 SMBJ8.5CAHE3_A/I?
For technical support, including SMBJ8.5CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.5CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ8.5CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ8.5CAHE3_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 SMBJ8.5CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ8.5CAHE3_A/I?
All SMBJ8.5CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.5CAHE3_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 SMBJ8.5CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ8.5CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.5CAHE3_A/I Tags
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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