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Vishay General Semiconductor - Diodes Division SMB8J11CAHM3_B/H
- Part No.:
- SMB8J11CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J11CAHM3_B/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,680
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Product details
Overview
SMB8J11CAHM3_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 signal and power lines. It features a 12.2 V minimum breakdown voltage (VBR), 11 V stand-off voltage (VWM), 18.2 V maximum clamping voltage (VC) at 44.0 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 SMB8J11CAHM3_B/H datasheet, SMB8J11CAHM3_B/H pinout, SMB8J11CAHM3_B/H application, or SMB8J11CAHM3_B/H equivalent, this part delivers AEC-Q101 qualified transient suppression for bidirectional signal paths where low clamping voltage, fast response (<1 ns), and halogen-free RoHS compliance are required in space-constrained surface-mount designs.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response to ESD and lightning-induced transients. Its 18.2 V clamping voltage at 44.0 A ensures robust protection of downstream 12 V logic and analog circuitry without overstressing IC inputs.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W, enabling reliable performance under sustained surge duty cycles when mounted on 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 12.2 V / 13.5 V at 1.0 mA test current - defines precise voltage threshold where avalanche conduction begins |
| VWM | 11 V - maximum continuous reverse working voltage before leakage exceeds 5.0 µA |
| VC @ IPPM | 18.2 V at 44.0 A (10/1000 µs) - limits voltage seen by protected circuit during worst-case surge |
| PPPM | 800 W - peak transient power handling capability under standardized surge waveform |
| IPPM | 44.0 A - maximum non-repetitive surge current the device safely clamps without failure |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; surge current flows bidirectionally through same junction |
| Cathode Band (absent) | Polarity indicator | Not applicable - bidirectional construction requires no marking per datasheet specification |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and supports lead-free reflow profiles up to 260 °C peak |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 12 V systems |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; no baking required prior to assembly |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
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 TVS placed directly at connector entry point to clamp transients before reaching PHY layer. Use Value: 18.2 V clamping ensures <12 V rail integrity during 800 W surges, preserving signal fidelity and preventing latch-up in 12 V microcontrollers. |
Use Scenario: Shielding PLC digital input modules from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Primary surge shunt on 24 V DC input lines, coordinated with upstream fuse and series impedance. Use Value: 44.0 A IPPM rating handles repetitive 10/1000 µs transients common in factory automation without degradation. |
| Consumer USB Port Protection | Telecom Line Interface |
Use Scenario: Safeguarding USB 2.0 data lines (D+/D−) against ESD events per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to connector to minimize stub length. Use Value: Sub-nanosecond response and 18.2 V clamping prevent data corruption while maintaining signal integrity up to 480 Mbps. |
Use Scenario: Protecting Ethernet PHY front-end and telephone line interface circuits from lightning-induced surges. IC Role / Device Role / Timing Role: First-stage clamping device on twisted-pair lines before isolation transformer and receiver IC. Use Value: 800 W PPPM sustains multi-kV surge events without failure, extending system uptime in outdoor telecom cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J11CAHE3_B/H | Same electrical specs; RoHS-compliant but not halogen-free; uses standard tin plating instead of matte tin | Approved for commercial/industrial use only - not AEC-Q101 qualified | Select when automotive qualification is unnecessary and cost optimization is prioritized |
| SMAJ11CA | Lower PPPM (400 W), higher VC (23.0 V), SMA package (smaller footprint, lower thermal mass) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump | Choose only for space-constrained consumer applications with ≤400 W surge requirements |
Compared with SMB8J11CAHM3_B/H, the HE3 variant lacks halogen-free certification and automotive qualification, while the SMAJ11CA sacrifices 50 % surge power handling and clamping performance - making SMB8J11CAHM3_B/H the sole option meeting AEC-Q101, 800 W, and 18.2 V clamping in SMB package.
Availability
SMB8J11CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line interface circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J11CAHM3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power, bidirectional transient suppression in automotive and industrial environments where AEC-Q101 compliance and low clamping voltage are critical.
FAQ
What is the clamping voltage of SMB8J11CAHM3_B/H at its rated peak pulse current?
The SMB8J11CAHM3_B/H has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 44.0 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures protected circuits remain below critical overvoltage thresholds during surge events. The SMB8J11CAHM3_B/H maintains this clamping performance across its full operating temperature range.
Is SMB8J11CAHM3_B/H suitable for automotive applications?
Yes, SMB8J11CAHM3_B/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, and automotive-grade). It meets stringent requirements for temperature cycling, humidity testing, and surge endurance - making it appropriate for engine control units, body electronics, and ADAS sensor interfaces. The SMB8J11CAHM3_B/H is listed in Vishay's automotive ordering matrix with base code HM3_X.
What does the "HM3_B/H" suffix indicate in SMB8J11CAHM3_B/H?
The "HM3" denotes halogen-free, RoHS-compliant construction with matte tin-plated leads qualified to JESD 201 Class 2 whisker resistance, while "B/H" specifies packaging in 7″ diameter plastic tape and reel with 750 units per reel. This suffix confirms compliance with automotive environmental standards and ensures compatibility with lead-free reflow processes peaking at 260 °C. The SMB8J11CAHM3_B/H ordering code is fully aligned with Vishay's documented automotive logistics format.
How does SMB8J11CAHM3_B/H differ from unidirectional variants like SMB10J11A?
SMB8J11CAHM3_B/H is bidirectional with symmetrical clamping behavior and no polarity marking, whereas SMB10J11A is unidirectional with a cathode band and forward conduction capability (IFSM = 100 A). The SMB8J11CAHM3_B/H offers 800 W PPPM, while SMB10J11A provides 1000 W but only in one direction. Their VBR and VC values are closely matched, but the SMB8J11CAHM3_B/H is optimized for AC or floating signal lines, unlike the SMB10J11A intended for DC rail protection.
What is the thermal resistance of SMB8J11CAHM3_B/H, and how does it affect layout design?
SMB8J11CAHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W when mounted on 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal. This requires PCB layout with adequate copper area to dissipate heat during repeated surge events; reducing pad size increases thermal impedance and risks junction overheating. The SMB8J11CAHM3_B/H datasheet specifies exact mounting pad dimensions to ensure rated performance.
SMB8J11CAHM3_B/H 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 11V
- Current - Peak Pulse (10/1000µs):
- 44A
- 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)
SMB8J11CAHM3_B/H FAQ
1.How can I place an order for SMB8J11CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J11CAHM3_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 SMB8J11CAHM3_B/H reliable?
The price and inventory of SMB8J11CAHM3_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 SMB8J11CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J11CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J11CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J11CAHM3_B/H?
SMB8J11CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J11CAHM3_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 SMB8J11CAHM3_B/H?
For technical support, including SMB8J11CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J11CAHM3_B/H requirements.
6.How does Aetrix verify that SMB8J11CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J11CAHM3_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 SMB8J11CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J11CAHM3_B/H?
All SMB8J11CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J11CAHM3_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 SMB8J11CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMB8J11CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J11CAHM3_B/H Tags
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