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Vishay General Semiconductor - Diodes Division SM6T12CAHM3/H
- Part No.:
- SM6T12CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T12CAHM3/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,784
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Product details
Overview
SM6T12CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 12 V breakdown voltage (VBR min/max = 11.4–12.6 V), 600 W peak pulse power (10/1000 μs), 16.7 V maximum clamping voltage at IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T12CAHM3/H datasheet, SM6T12CAHM3/H pinout, SM6T12CAHM3/H application, or SM6T12CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (16.7 V / 12 V ≈ 1.39), halogen-free RoHS compliance, MSL level 1 rating, and suitability for automotive-grade ESD/surge protection in sensor interfaces and power rails.
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<5.0 μA at VWM = 10.2 V), while low inductance supports fast transient response under 8/20 μs and 10/1000 μs surge waveforms.
The device is rated for TJ = –65 °C to +150 °C and derates linearly above 25 °C ambient, with RθJA = 100 °C/W and RθJL = 20 °C/W. Mounting on 5.0 mm × 5.0 mm copper pads per terminal is required to sustain full 600 W pulse power per JEDEC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at IT = 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 10.2 V - maximum continuous reverse stand-off voltage before leakage exceeds 5.0 μA |
| VC @ IPPM | 16.7 V at 36.0 A (10/1000 μs) - actual clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak pulse power handling capacity under standardized 10/1000 μs waveform |
| TJ range | –65 °C to +150 °C - enables operation in under-hood automotive and industrial environments |
| Qualification | AEC-Q101 qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated placement and reflow soldering |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated, 0.220" × 0.130" outline, 0.086" cathode band width. Bidirectional construction means no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Accepts surge current in either direction; connects to line being protected |
| Cathode | Transient current exit point (bidirectional) | Completes clamping path to reference plane; electrically identical to Anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and floating power domains without polarity constraints |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) when properly mounted on recommended PCB copper area |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics requiring long-term reliability |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and JESD201 Class 2 whisker resistance for high-reliability solder joints |
| Low clamping ratio (1.39) | Minimizes voltage overshoot during transients, reducing stress on downstream ICs such as microcontrollers and transceivers |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor outputs from load dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential sensor output lines to clamp ±20 V transients to <±17 V. Use Value: Prevents latch-up or damage to analog front-end amplifiers and ADC inputs while maintaining signal integrity below 10.2 V operating range. | Use Scenario: Guarding CANH/CANL lines in factory automation gateways against EFT and surge events per IEC 61000-4-4/4-5. IC Role / Device Role / Timing Role: Symmetric clamping element referenced to common-mode ground, absorbing common-mode surges without disrupting DC bias. Use Value: Maintains bus communication integrity during 1 kV/500 A surge events while adding <0.5 pF capacitance per line at 0 V bias. |
| Consumer Power Adapter Input | Telecom DSL Line Card Protection |
Use Scenario: Safeguarding primary-side rectifier and controller ICs in wall adapters subjected to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Secondary-stage TVS after MOV, limiting let-through voltage to <17 V for 600 W pulses. Use Value: Reduces risk of MOSFET avalanche failure and controller IC overvoltage shutdown during repetitive line disturbances. | Use Scenario: Protecting ADSL/VDSL line interface ICs from induced surges on twisted-pair telephone lines in central office equipment. IC Role / Device Role / Timing Role: Bidirectional shunt device across line pair, referenced to isolation transformer secondary. Use Value: Clamps longitudinal surges to ≤16.7 V while preserving low insertion loss (<0.1 dB) and return loss (>20 dB) up to 30 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | 400 W PPPM, same VBR (11.4–12.6 V), SMA package (smaller thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost or board space is critical and automotive qualification is unnecessary |
| SMCJ12CA | 1500 W PPPM, same VBR, SMC package (larger footprint, higher thermal inertia) | Overqualified for 600 W needs; requires larger PCB pad area | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 or long-life field deployment demands margin |
Compared with SMAJ12CA and SMCJ12CA, the SM6T12CAHM3/H delivers optimal balance of 600 W surge capability, AEC-Q101 qualification, SMB footprint compatibility, and halogen-free compliance-making it the preferred choice for automotive and industrial designs where reliability, regulatory alignment, and layout efficiency are jointly prioritized.
Availability
SM6T12CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN networks, consumer power adapter inputs, and telecom line card protection requiring stable component supply and long-term lifecycle support.
Supply support for SM6T12CAHM3/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 high-reliability, automotive-qualified, and environmentally compliant solutions.
The SM6T Series is engineered specifically for robust transient voltage suppression in harsh environments, targeting automotive, industrial, and telecom applications where bidirectional clamping, AEC-Q101 validation, and consistent surge performance are mandatory.
FAQ
What is the clamping voltage of SM6T12CAHM3/H under a 10/1000 μs surge?
The SM6T12CAHM3/H has a maximum clamping voltage (VC) of 16.7 V at 36.0 A peak pulse current under the 10/1000 μs waveform. This value is measured per JEDEC standard test conditions with 5.0 mm × 5.0 mm copper pads per terminal and represents the highest voltage imposed on the protected circuit during a defined surge event. The SM6T12CAHM3/H maintains this clamping performance across its full operating temperature range.
Is SM6T12CAHM3/H suitable for automotive applications?
Yes, SM6T12CAHM3/H is AEC-Q101 qualified and designated with the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 requirements. The SM6T12CAHM3/H is explicitly intended for use in engine control modules, ADAS sensors, and body electronics where reliability under thermal and electrical stress is critical.
What does the "CA" suffix mean in SM6T12CAHM3/H?
The "CA" suffix in SM6T12CAHM3/H denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both polarities. Unlike unidirectional variants (e.g., SM6T12AHM3/H), the CA version has no cathode marking and functions identically regardless of voltage polarity applied across its terminals. This makes the SM6T12CAHM3/H ideal for protecting AC-coupled signals, differential buses, and floating power domains.
What is the maximum reverse leakage current for SM6T12CAHM3/H at rated VWM?
At the maximum stand-off voltage (VWM = 10.2 V) and ambient temperature of 25 °C, the SM6T12CAHM3/H exhibits a maximum reverse leakage current (ID) of 5.0 μA. This low leakage ensures minimal power loss and signal interference in always-on circuits such as automotive sensor bias networks or telecom line monitoring paths. The SM6T12CAHM3/H maintains leakage below 10 μA up to 125 °C junction temperature per datasheet characterization.
Does SM6T12CAHM3/H require special PCB layout considerations?
Yes, to achieve rated 600 W peak pulse power, SM6T12CAHM3/H must be mounted on minimum 5.0 mm × 5.0 mm copper pads per terminal as specified in the Vishay datasheet. Smaller pads reduce thermal dissipation and cause premature failure under surge conditions. The SM6T12CAHM3/H also requires adherence to SMB (DO-214AA) land pattern dimensions and avoids thermal reliefs on high-current traces to maintain clamping performance during transient events.
SM6T12CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 36A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T12CAHM3/H FAQ
1.How can I place an order for SM6T12CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T12CAHM3/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 SM6T12CAHM3/H reliable?
The price and inventory of SM6T12CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T12CAHM3/H is usually 5 days.
3.What payment methods are accepted for SM6T12CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T12CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T12CAHM3/H?
SM6T12CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T12CAHM3/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 SM6T12CAHM3/H?
For technical support, including SM6T12CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T12CAHM3/H requirements.
6.How does Aetrix verify that SM6T12CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SM6T12CAHM3/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 SM6T12CAHM3/H meets industry standards.
7.What is the process for return or replacement of SM6T12CAHM3/H?
All SM6T12CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T12CAHM3/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 SM6T12CAHM3/H part is unused and in its original packaging.
Return procedure for SM6T12CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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