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Vishay General Semiconductor - Diodes Division SMB8J14CAHM3_A/I
- Part No.:
- SMB8J14CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14CAHM3_A/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,124
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Product details
Overview
SMB8J14CAHM3_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 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage (VC) at 34.5 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 SMB8J14CAHM3_A/I datasheet, SMB8J14CAHM3_A/I pinout, SMB8J14CAHM3_A/I application, or SMB8J14CAHM3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 suffix, bidirectional polarity, and verified clamping performance under 10/1000 µs transients per ANSI/IEEE C62.35.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown junction, responding within <1 ps to transient overvoltages. Its bidirectional architecture enables symmetric suppression of positive and negative surges without polarity dependency, making it suitable for AC-coupled or floating signal paths.
Thermal design relies on low RθJL (20 °C/W) and moderate RθJA (72 °C/W), requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for rated 800 W dissipation. It meets MSL level 1 per J-STD-020 and supports reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines safe working range for protected line. |
| VBR min/max | 15.6 V / 17.2 V at 1.0 mA test current - Ensures reliable avalanche initiation within tight tolerance for consistent clamping onset. |
| VC @ IPPM | 23.2 V at 34.5 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 800 W - Peak transient energy absorption capability; validates suitability for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in battery-powered systems. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating below full rating. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads, MSL level 1, 260 °C reflow compatible. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward bias; common node in bidirectional configuration | No polarity marking required - symmetrical structure allows either terminal to serve as input or return path for transient energy. |
| Cathode (unmarked end) | Current exit point in forward bias; identical electrical role to anode in bidirectional mode | Both terminals are functionally interchangeable; no color band or marking distinguishes polarity for SMB8J14CAHM3_A/I. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded sensor outputs without external polarity management. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including engine control modules, ADAS camera links, and body electronics exposed to harsh thermal and vibration profiles. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage overshoot during surge events - critical for safeguarding 3.3 V or 5 V logic interfaces connected to unprotected external connectors. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental compliance mandates and JESD201 Class 2 whisker resistance, supporting sustainable manufacturing and high-reliability assembly. |
| MSL Level 1 handling | Eliminates dry-pack requirement and floor-life constraints - simplifies SMT line logistics and reduces inventory control overhead for high-volume production. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine compartments subject to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between signal line and ground, absorbing >800 W surges while limiting voltage to ≤23.2 V. Use Value: Prevents latch-up or gate oxide damage in 12 V–system microcontrollers and ASICs by maintaining clamped voltage below absolute maximum ratings. |
Use Scenario: Safeguarding PLC digital input channels connected to field wiring exposed to ESD and lightning-induced surges in factory automation. IC Role / Device Role / Timing Role: Bidirectional transient suppressor mounted at connector entry point, shunting surge current away from optocoupler input stages. Use Value: Enables robust 24 V DC input operation with ≤1.0 µA leakage, preserving input threshold accuracy and reducing false triggering. |
| Automotive Camera Link Protection | Consumer USB Port ESD Suppression |
Use Scenario: Shielding MIPI CSI-2 differential pairs in rear-view or surround-view cameras from cable discharge events and ESD coupling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed across differential lanes, leveraging symmetrical clamping to preserve signal integrity. Use Value: Maintains signal fidelity with minimal added capacitance (<100 pF typical), avoiding jitter or eye diagram degradation at 1.5 Gbps data rates. |
Use Scenario: Protecting USB 2.0 D+/D− lines in portable devices against human-body-model (HBM) ESD up to ±15 kV contact discharge. IC Role / Device Role / Timing Role: Fast-response TVS integrated into USB connector subcircuit, clamping transients before reaching USB PHY controller. Use Value: Achieves IEC 61000-4-2 Level 4 compliance (±8 kV contact) with sub-nanosecond response and no signal distortion during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J14CAHE3_A/I | Same electrical specs and SMB package, but RoHS-compliant commercial-grade (E3) without halogen-free certification. | Lacks JESD201 Class 2 whisker resistance and halogen-free compliance required for automotive Tier-1 supply chains. | Select when AEC-Q101 is not mandated and cost sensitivity outweighs environmental compliance requirements. |
| SMAJ14CA | Lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VC specs. | Requires larger PCB area and delivers lower surge margin; not qualified to AEC-Q101. | Use only in space-constrained non-automotive designs where 400 W surge rating suffices and halogen-free is optional. |
Compared with SMB8J14CAHM3_A/I, the HE3 variant trades halogen-free status for lower unit cost in commercial applications, while SMAJ14CA sacrifices surge capacity and thermal performance for legacy footprint compatibility - neither offers drop-in replacement without layout or reliability reassessment.
Availability
SMB8J14CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, and consumer USB port ESD suppression requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for SMB8J14CAHM3_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, efficiency, and application-specific optimization.
The SMB8JxxCA series targets high-surge, automotive-grade transient protection - engineered for robustness in harsh environments and optimized for automated SMT assembly with MSL Level 1 handling.
FAQ
What is the clamping voltage of SMB8J14CAHM3_A/I at its rated peak pulse current?
The SMB8J14CAHM3_A/I exhibits a maximum clamping voltage (VC) of 23.2 V when subjected to its rated 34.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components remain within safe voltage limits during surge events. The SMB8J14CAHM3_A/I maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMB8J14CAHM3_A/I suitable for automotive applications?
Yes, SMB8J14CAHM3_A/I is AEC-Q101 qualified and specifically designed for automotive use cases including sensor interfaces, camera links, and body electronics. Its halogen-free (HM3) construction, MSL Level 1 rating, and validated performance under thermal cycling, high-temperature reverse bias, and humidity testing confirm suitability for under-hood and cabin-mounted systems. The SMB8J14CAHM3_A/I meets ISO 7637-2 and IEC 61000-4-5 immunity requirements when applied per Vishay's recommended layout guidelines.
How does the bidirectional configuration of SMB8J14CAHM3_A/I affect circuit design?
The bidirectional nature of SMB8J14CAHM3_A/I eliminates polarity concerns during placement - both terminals are electrically identical, enabling flexible routing on differential or AC-coupled lines without orientation checks. This simplifies layout for interfaces like CAN, RS-485, or MIPI CSI-2, where symmetric surge protection is required. Unlike unidirectional TVS diodes, the SMB8J14CAHM3_A/I provides equal clamping in both directions, ensuring consistent protection regardless of transient polarity or grounding scheme.
What is the maximum reverse leakage current for SMB8J14CAHM3_A/I at its stand-off voltage?
The SMB8J14CAHM3_A/I specifies a maximum reverse leakage current (ID) of 1.0 µA at its 14 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves signal integrity in high-impedance sensor circuits and minimizes power loss in battery-operated systems. Leakage remains below 5.0 µA up to +85 °C, ensuring stable performance across industrial operating ranges without compromising system accuracy or standby current budgets.
Does SMB8J14CAHM3_A/I require special PCB layout considerations?
Yes - to achieve its rated 800 W peak pulse power, SMB8J14CAHM3_A/I must be mounted on minimum 5.0 mm × 5.0 mm copper pads per terminal, as specified in the Vishay datasheet. Smaller pads cause thermal derating and reduce surge capability. Additionally, short, direct traces to ground planes minimize inductance and ensure effective clamping. The SMB8J14CAHM3_A/I does not require thermal vias for standard operation but benefits from internal layer copper pours for enhanced heat spreading in high-duty-cycle applications.
SMB8J14CAHM3_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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 34.5A
- 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)
SMB8J14CAHM3_A/I FAQ
1.How can I place an order for SMB8J14CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14CAHM3_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 SMB8J14CAHM3_A/I reliable?
The price and inventory of SMB8J14CAHM3_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 SMB8J14CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J14CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14CAHM3_A/I?
SMB8J14CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14CAHM3_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 SMB8J14CAHM3_A/I?
For technical support, including SMB8J14CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J14CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J14CAHM3_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 SMB8J14CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J14CAHM3_A/I?
All SMB8J14CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14CAHM3_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 SMB8J14CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J14CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J14CAHM3_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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Toshiba Semiconductor and Storage
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Diodes Incorporated
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