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Vishay General Semiconductor - Diodes Division SMB8J11CAHE3_A/H
- Part No.:
- SMB8J11CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J11CAHE3_A/H.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,885
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Product details
Overview
SMB8J11CAHE3_A/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 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V clamping voltage (VC) at 44 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 SMB8J11CAHE3_A/H datasheet, SMB8J11CAHE3_A/H pinout, SMB8J11CAHE3_A/H application, or SMB8J11CAHE3_A/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional symmetry, low clamping ratio (VC/VWM ≈ 1.65), 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 an avalanche junction to divert surge energy away from downstream ICs. Its bidirectional structure enables symmetric clamping for AC-coupled or floating lines without polarity concerns, and its glass-passivated chip ensures stable VBR tolerance and long-term reliability under repetitive surges.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = +150 °C. The device meets J-STD-020 MSL Level 1 (260 °C peak reflow), and its 1.0 μA max reverse leakage at VWM ensures minimal standby power impact in battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line's nominal DC bias. |
| VBR min/max | 12.2 V / 13.5 V at IT = 1 mA - tight 10.7% tolerance ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 18.2 V at IPPM = 44 A - clamping voltage defines worst-case stress on downstream circuitry during 10/1000 μs surge. |
| PPPM | 800 W - peak power handling capacity with standard 10/1000 μs waveform; determines survivability against lightning-induced or inductive-switching transients. |
| ID @ VWM | 5.0 μA max - ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - enables use in under-hood automotive environments and thermally constrained industrial enclosures. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals require no orientation during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Transient conduction path | Both terminals function identically; surge current flows bidirectionally between them when |V| > VC - eliminates layout polarity constraints. |
| Case (body) | Thermal and mechanical interface | Plastic case provides UL 94 V-0 flammability rating; thermal path to PCB copper via soldered leads (RθJL = 20 °C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines (e.g., CAN, RS-485, sensor bridges) without external polarity management. |
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules, ADAS sensors, and body controllers requiring extended temperature and lifetime reliability. |
| Low clamping ratio (VC/VWM = 1.65) | Minimizes overvoltage stress on protected ICs - critical for 12 V rail interfaces where margin above VWM must stay below 20 V. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake requirements and reducing manufacturing cost. |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with reduced parameter drift vs. epoxy-passivated alternatives in harsh environments. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine compartments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Bidirectional TVS placed directly at connector entry point to clamp transients before reaching ASIC input pins. Use Value: Withstands 800 W surges while limiting clamped voltage to 18.2 V - within safe operating range of 24 V-tolerant automotive receivers. |
Use Scenario: Shielding PLC digital input modules from field-wiring induced surges (e.g., relay coil flyback, motor switching noise). IC Role / Device Role: Primary front-end transient suppressor on 24 V DC input channels, mounted on 5.0 mm × 5.0 mm thermal pads. Use Value: 44 A IPPM capability and 1.0 μA leakage ensure reliable detection of true logic states without false triggering or standby current penalty. |
| Telecom Line Interface | Consumer USB/Type-C ESD Protection |
|
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE injectors against lightning-induced common-mode surges on twisted-pair cables. IC Role / Device Role: Common-mode TVS pair (two SMB8J11CAHE3_A/H devices) across differential pairs to suppress asymmetrical transients. Use Value: Symmetric bidirectional response maintains signal integrity on full-duplex links while meeting IEC 61000-4-5 Level 3 (1 kV/2 Ω) requirements. |
Use Scenario: Secondary-level surge protection behind primary ESD arrays in USB 2.0 data lines and VBUS paths of portable chargers. IC Role / Device Role: High-power backup suppressor absorbing residual energy after fast ESD diodes clamp initial 8 kV contact discharge. Use Value: 800 W PPPM handles sustained surges (e.g., hot-plug inductive kick) that exceed ESD-only device ratings, extending system robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CAHE3_A/H | Unidirectional variant with same VWM/VBR/VC but asymmetric conduction; lacks reverse conduction path. | Only suitable for DC-biased lines with known polarity; cannot protect AC or floating signals. | Select SMBJ11CAHE3_A/H only when circuit topology guarantees unidirectional surge direction and polarity stability. |
| SMAJ11CAHE3_A/H | Same electrical specs but in smaller SMA (DO-214AC) package; lower PPPM = 400 W due to reduced thermal mass. | Limited to lower-energy transients; unsuitable for automotive load dump or industrial 24 V I/O where 800 W is required. | Choose SMAJ11CAHE3_A/H only for space-constrained consumer applications with verified <400 W surge exposure. |
Compared with SMBJ11CAHE3_A/H and SMAJ11CAHE3_A/H, SMB8J11CAHE3_A/H uniquely delivers bidirectional 800 W surge immunity in AEC-Q101-qualified SMB packaging - making it the sole option for automotive-grade, polarity-agnostic, high-energy protection without derating or parallel devices.
Availability
SMB8J11CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial programmable logic controller (PLC) inputs, telecom line interfaces, and consumer USB power delivery systems requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J11CAHE3_A/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, power density, and automotive qualification.
The SMB8JxxCAHE3 series belongs to Vishay's TRANSZORB® high-power TVS family, engineered specifically for AEC-Q101-compliant surge protection in harsh automotive and industrial environments where bidirectional clamping and thermal robustness are mandatory.
FAQ
What is the clamping voltage of SMB8J11CAHE3_A/H at its rated peak pulse current?
The SMB8J11CAHE3_A/H has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 44 A using the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMB8J11CAHE3_A/H suitable for automotive applications?
Yes, SMB8J11CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3" indicating RoHS-compliant and AEC-Q101-qualified construction. It supports operating junction temperatures from –55 °C to +150 °C and is validated for temperature cycling, highly accelerated life testing, and ESD robustness - making SMB8J11CAHE3_A/H appropriate for engine control units, ADAS camera modules, and body electronics.
How does the bidirectional nature of SMB8J11CAHE3_A/H affect PCB layout?
The bidirectional design of SMB8J11CAHE3_A/H eliminates polarity marking - both terminals are functionally identical, so no cathode band orientation is required during placement. This simplifies layout, reduces assembly errors, and enables use on AC-coupled or floating differential lines (e.g., CAN, RS-485) without additional diodes or routing constraints - a direct advantage over unidirectional variants like SMBJ11CAHE3_A/H.
What is the maximum reverse leakage current for SMB8J11CAHE3_A/H at its stand-off voltage?
At its 11 V stand-off voltage (VWM), the SMB8J11CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 5.0 μA at TA = 25 °C. This ultra-low leakage ensures minimal power loss in always-on systems such as automotive wake-up circuits or battery-powered IoT sensors - preserving battery life and avoiding false triggers in high-impedance monitoring paths.
Can SMB8J11CAHE3_A/H be used in parallel to increase surge current handling?
No - SMB8J11CAHE3_A/H is not characterized or recommended for parallel operation. Variations in VBR tolerance (12.2–13.5 V) and dynamic impedance can cause uneven current sharing during transients, leading to premature failure of one device. For higher IPPM requirements, select a single higher-rated device (e.g., SMB10J11CAHE3_A/H with 1000 W PPPM) rather than paralleling SMB8J11CAHE3_A/H units.
SMB8J11CAHE3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 44A
- 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)
SMB8J11CAHE3_A/H FAQ
1.How can I place an order for SMB8J11CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J11CAHE3_A/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 SMB8J11CAHE3_A/H reliable?
The price and inventory of SMB8J11CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J11CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J11CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J11CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J11CAHE3_A/H?
SMB8J11CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J11CAHE3_A/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 SMB8J11CAHE3_A/H?
For technical support, including SMB8J11CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J11CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J11CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J11CAHE3_A/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 SMB8J11CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J11CAHE3_A/H?
All SMB8J11CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J11CAHE3_A/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 SMB8J11CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMB8J11CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J11CAHE3_A/H Tags
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