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Vishay General Semiconductor - Diodes Division SMB8J11CAHM3_A/I
- Part No.:
- SMB8J11CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J11CAHM3_A/I.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,662
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Product details
Overview
SMB8J11CAHM3_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 12.2 V minimum breakdown voltage (VBR), 11 V standoff voltage (VWM), 18.2 V clamping voltage (VC) at 44.0 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with AEC-Q101 qualification for automotive use.
For engineers reviewing the SMB8J11CAHM3_A/I datasheet, SMB8J11CAHM3_A/I pinout, SMB8J11CAHM3_A/I application, or SMB8J11CAHM3_A/I equivalent, this device is selected for robust ESD and lightning surge protection in automotive sensor interfaces, industrial I/O modules, and telecom line cards where low clamping voltage, fast response (<1 ns), and halogen-free RoHS compliance are critical.
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 VBR tolerance (±10%), low leakage (<5.0 μA at VWM), and reliable operation from −55 °C to +150 °C junction temperature.
The device uses a 10/1000 μs standard surge waveform per ANSI/IEEE C62.35, with thermal resistance RθJA = 72 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, supporting high-reliability mounting in space-constrained automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 12.2 V / 13.5 V - Breakdown occurs within this band at 1.0 mA test current; ensures predictable turn-on during transients. |
| VC @ IPPM | 18.2 V - Clamped voltage at 44.0 A peak pulse current; limits downstream voltage stress during 800 W surge events. |
| PPPM | 800 W - Peak pulse power handling capability under 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 immunity. |
| IPPM | 44.0 A - Maximum non-repetitive surge current the device safely clamps; determines minimum trace width and fuse coordination. |
| Junction Temp Range | −55 °C to +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures without derating. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads, MSL level 1 (260 °C reflow peak), UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward bias; symmetrical terminal in bidirectional operation | No polarity marking required; terminals are functionally identical for AC surge suppression. |
| Cathode (unmarked end) | Current exit point in forward bias; symmetrical terminal in bidirectional operation | Identical to anode in bidirectional configuration; device conducts equally in both directions above VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential pairs (e.g., CAN, RS-485) without external polarity management. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure to downstream ICs-critical for 12 V rail protection in automotive ECUs. |
| AEC-Q101 qualified + HM3 suffix | Confirms suitability for automotive applications requiring zero defects, extended temperature operation, and long-term reliability. |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and eliminates corrosive halogen emissions during board assembly or field failure. |
| Fast response time (<1 ns) | Clamps ESD events (IEC 61000-4-2) before sensitive logic or analog front-ends are damaged. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and temperature/pressure sensor outputs from load dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±100 V transients within 1 ns. Use Value: Maintains signal integrity by limiting clamped voltage to 18.2 V-well below 24 V system rail and IC absolute maximum ratings. | Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from induced surges due to nearby motor switching. IC Role / Device Role / Timing Role: Primary surge shunt located between input terminals and signal conditioning op-amp stage. Use Value: Absorbs 800 W surges without degradation, preserving measurement accuracy and preventing ADC saturation or latch-up. |
| Telecom Line Card Protection | Consumer USB Port ESD Guard |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-line defense in series with common-mode chokes, rated for IEC 61000-4-5 Level 4 (4 kV/2 Ω). Use Value: Delivers 44.0 A peak current handling with 18.2 V clamping-reducing secondary protection burden on integrated PHY ESD structures. | Use Scenario: Adding discrete-level ESD protection to USB 2.0 data lines (D+/D−) in portable devices where SoC ESD rating is insufficient. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed directly at USB connector, minimizing stub length. Use Value: Provides <5.0 μA leakage at 11 V and sub-1 ns response-preserving signal rise time while passing IEC 61000-4-2 ±15 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J11CAHE3_A/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Preferred for commercial-automotive hybrids where halogen content is unrestricted. | Select when cost sensitivity outweighs halogen-free requirement and full automotive supply chain traceability is not mandated. |
| SMAJ11CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (95 °C/W), same VWM/VC. | Suitable for space-constrained consumer or industrial boards with lower surge threat levels. | Choose only if layout area is limited and IEC 61000-4-5 Level 3 (2 kV) suffices-avoid for automotive or heavy industrial use. |
Compared with SMB8J11CAHM3_A/I, the HE3 variant trades halogen-free status for marginally lower cost without sacrificing AEC-Q101 compliance, while the SMAJ11CA reduces surge capacity and thermal performance to fit tighter footprints-neither is pin-compatible due to differing package outlines (SMB vs. SMA).
Availability
SMB8J11CAHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial I/O module production, and telecom infrastructure projects requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB8J11CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMB8JxxCA family is engineered for high-power transient suppression in harsh environments-specifically targeting automotive, industrial, and telecom systems needing AEC-Q101-qualified, bidirectional, low-clamping TVS diodes in compact SMB packages.
FAQ
What is the clamping voltage of SMB8J11CAHM3_A/I at its rated peak pulse current?
The SMB8J11CAHM3_A/I has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 44.0 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe operating limits during standardized surge events. The SMB8J11CAHM3_A/I maintains this performance across its full operating temperature range.
Is SMB8J11CAHM3_A/I suitable for automotive applications?
Yes, SMB8J11CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets requirements for temperature cycling, high-temperature reverse bias, and ESD robustness. The SMB8J11CAHM3_A/I is specified for junction temperatures from −55 °C to +150 °C, making it appropriate for under-hood and body-control module deployments.
How does the bidirectional nature of SMB8J11CAHM3_A/I affect its placement in circuit design?
The SMB8J11CAHM3_A/I has no polarity marking and functions identically in both directions, simplifying layout for AC-coupled or differential signal lines such as CAN, RS-485, or Ethernet pairs. Unlike unidirectional TVS diodes, the SMB8J11CAHM3_A/I requires no orientation check during automated placement and eliminates risk of reverse installation-reducing assembly errors and enabling symmetric protection topology.
What is the standoff voltage (VWM) of SMB8J11CAHM3_A/I, and why is it important?
The standoff voltage (VWM) of SMB8J11CAHM3_A/I is 11 V-this is the maximum continuous DC or RMS voltage the device can block without entering conduction. It must be selected ≥10–20% above the normal operating voltage of the protected line to prevent leakage or false triggering. For a 12 V automotive system, the SMB8J11CAHM3_A/I's 11 V VWM provides tight margin for nominal conditions while allowing headroom for ripple and transients.
Does SMB8J11CAHM3_A/I require special PCB layout considerations?
Yes-optimal performance of SMB8J11CAHM3_A/I requires adherence to Vishay's recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 800 W pulse power and thermal resistance (RθJA = 72 °C/W). Short, wide traces and ground plane connection beneath the device minimize inductance and improve clamping speed. The SMB8J11CAHM3_A/I should be placed as close as possible to the protected connector or IC pin.
SMB8J11CAHM3_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):
- 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:
- 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_A/I FAQ
1.How can I place an order for SMB8J11CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J11CAHM3_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 SMB8J11CAHM3_A/I reliable?
The price and inventory of SMB8J11CAHM3_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 SMB8J11CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J11CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J11CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J11CAHM3_A/I?
SMB8J11CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J11CAHM3_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 SMB8J11CAHM3_A/I?
For technical support, including SMB8J11CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J11CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J11CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J11CAHM3_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 SMB8J11CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J11CAHM3_A/I?
All SMB8J11CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J11CAHM3_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 SMB8J11CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J11CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J11CAHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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