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Vishay General Semiconductor - Diodes Division SM6T12CAHE3/5B
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- Part No.:
- SM6T12CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T12CAHE3/5B.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,459
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Product details
Overview
SM6T12CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 12 V standoff voltage (VWM = 10.2 V), 600 W peak pulse power (10/1000 μs), and clamping voltage of 16.7 V at 36 A. It provides robust ESD and surge protection for automotive sensor signal lines, I/O interfaces, and MOSFET gate drivers.
For engineers reviewing the SM6T12CAHE3/5B datasheet, SM6T12CAHE3/5B pinout, SM6T12CAHE3/5B application, or SM6T12CAHE3/5B equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.64), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
The SM6T12CAHE3/5B operates as a voltage-clamped shunt protector with symmetrical breakdown in both directions (VBR min/max = 11.4 V / 12.6 V at 1 mA), enabling use in AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<5 μA at VWM) and long-term reliability under repetitive transients.
Thermally, it features RθJA = 100 °C/W and RθJL = 20 °C/W, supporting continuous dissipation up to 5.0 W at TA = 50 °C on infinite heatsink, with maximum junction temperature of +150 °C and storage range from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum reverse stand-off voltage before significant conduction begins; defines safe operating window for protected circuit. |
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - Bidirectional breakdown threshold; ensures symmetric clamping for AC or differential signals. |
| VC @ IPPM | 16.7 V at 36 A (10/1000 μs) - Clamping voltage during surge; limits stress on downstream ICs to safe levels. |
| PPPM | 600 W - Peak pulse power handling capability; withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source). |
| ID @ VWM | ≤5.0 μA - Reverse leakage current at stand-off voltage; minimizes standby power loss and signal distortion. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" × 0.130" footprint; compatible with J-STD-020 MSL level 1 reflow. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), molded case with matte tin-plated leads, UL 94 V-0 flammability rating, and polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional clamping | Connected to protected line; conducts during positive or negative overvoltage events relative to cathode reference. |
| Cathode | Current exit terminal in forward bias; common node in bidirectional clamping | Typically tied to ground or reference plane; completes low-impedance path for transient energy diversion. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of floating or AC-coupled signal lines without polarity constraints or external biasing. |
| 600 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics. |
| AEC-Q101 qualification | Validates suitability for under-hood and ADAS sensor modules requiring extended temperature and lifetime reliability. |
| Low clamping ratio (VC/VWM ≈ 1.64) | Minimizes voltage overshoot during transients, reducing risk of latch-up or damage to 3.3 V/5 V logic interfaces. |
| MSL level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles without baking, simplifying SMT manufacturing. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
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: Shunt TVS device placed between signal line and chassis ground to clamp transients below IC absolute maximum ratings. Use Value: Maintains signal integrity during 12 V system load dump (up to 60 V, 400 ms) by limiting clamped voltage to ≤16.7 V. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges and ESD events in factory automation. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across isolated input terminals to absorb ±1 kV EFT bursts and 4 kV contact discharge. Use Value: Prevents false triggering and latch-up in optocoupler input stages with <5 μA leakage at 10.2 V stand-off. |
| Consumer Power Adapter Input | MOSFET Gate Driver Protection |
Use Scenario: Secondary-side surge suppression in USB PD and QC adapters exposed to lightning-induced surges on DC output rails. IC Role / Device Role / Timing Role: Fast-response clamping element parallel to DC-DC controller feedback or output sensing nodes. Use Value: Limits transient overvoltage to <17 V during 10/1000 μs surges, preserving feedback accuracy and preventing regulator shutdown. | Use Scenario: Shielding high-side N-channel MOSFET gates from Miller-induced voltage spikes during fast switching in motor drives. IC Role / Device Role / Timing Role: Low-inductance TVS placed between gate and source to clamp dv/dt-induced overshoot. Use Value: Suppresses gate voltage excursions beyond ±20 V using 16.7 V clamping, avoiding oxide breakdown in 30 V-rated MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | Same SMB package, 600 W rating, but VWM = 10.2 V, VC = 19.9 V at 30.1 A - higher clamping voltage and lower peak current capability. | Less effective for low-voltage ICs requiring tight clamping; suitable where margin allows ≥19.9 V transient headroom. | Select SMAJ12CA only if layout constraints require identical footprint and clamping voltage margin exceeds 3.2 V. |
| 1.5KE12CA | Through-hole DO-201 package, 1500 W rating, VWM = 10.2 V, VC = 19.0 V at 79 A - higher power but incompatible mounting and larger footprint. | Used in legacy designs or high-energy surge zones (e.g., AC mains input); not suitable for space-constrained SMT layouts. | Choose 1.5KE12CA only when board-level surge energy exceeds 600 W and through-hole assembly is acceptable. |
Compared with SMAJ12CA and 1.5KE12CA, SM6T12CAHE3/5B delivers tighter clamping (16.7 V vs. ≥19.0 V), AEC-Q101 qualification for automotive use, and optimized SMT manufacturability - making it preferred for modern compact, high-reliability signal-line protection.
Availability
SM6T12CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O protection, and consumer power adapter secondary-side surge suppression requiring stable component supply and full traceability.
Supply support for SM6T12CAHE3/5B 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SM6T Series is designed for robust transient suppression in automotive, industrial, and consumer electronics, targeting AEC-Q101 compliance, low-profile SMT integration, and consistent clamping behavior across temperature and lifetime.
FAQ
What is the clamping voltage of SM6T12CAHE3/5B and how is it measured?
The SM6T12CAHE3/5B has a maximum clamping voltage (VC) of 16.7 V at 36 A, tested with a 10/1000 μs double-exponential surge waveform. This value is measured across the device terminals while applying the specified peak pulse current, and reflects the upper limit of voltage seen by protected circuitry during transient events. The SM6T12CAHE3/5B maintains this clamping performance bidirectionally due to its symmetrical construction.
Is SM6T12CAHE3/5B qualified for automotive applications?
Yes, SM6T12CAHE3/5B is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, confirming suitability for automotive environments such as engine control units, body electronics, and ADAS sensor interfaces. The SM6T12CAHE3/5B meets the reliability and lifetime requirements defined in the AEC-Q101 standard.
What does the "CA" suffix mean in SM6T12CAHE3/5B?
The "CA" suffix in SM6T12CAHE3/5B denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., SM6T12A), the SM6T12CAHE3/5B has no polarity marking and functions identically whether voltage stress is positive or negative relative to ground. This makes SM6T12CAHE3/5B ideal for protecting AC-coupled, differential, or floating signal lines.
What is the thermal resistance of SM6T12CAHE3/5B and how does it affect PCB layout?
The SM6T12CAHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. These values assume mounting on 0.2" × 0.2" copper pads per terminal. To maintain safe junction temperatures under sustained power dissipation, PCB layout must provide adequate copper area and minimize thermal isolation - especially critical when operating near the 5.0 W steady-state limit at elevated ambient temperatures.
How does SM6T12CAHE3/5B compare to unidirectional SM6T12A in terms of electrical performance?
SM6T12CAHE3/5B and SM6T12A share identical VWM (10.2 V), VBR (11.4–12.6 V), and PPPM (600 W) ratings, but differ in polarity behavior: SM6T12CAHE3/5B clamps symmetrically in both directions with no cathode marking, while SM6T12A is unidirectional with a band-marked cathode and conducts only in reverse bias. The SM6T12CAHE3/5B's bidirectional operation eliminates polarity concerns in AC or floating circuits, whereas SM6T12A requires correct orientation relative to ground.
SM6T12CAHE3/5B 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 (SMBJ)
SM6T12CAHE3/5B FAQ
1.How can I place an order for SM6T12CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T12CAHE3/5B 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 SM6T12CAHE3/5B reliable?
The price and inventory of SM6T12CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T12CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SM6T12CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T12CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T12CAHE3/5B?
SM6T12CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T12CAHE3/5B 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 SM6T12CAHE3/5B?
For technical support, including SM6T12CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T12CAHE3/5B requirements.
6.How does Aetrix verify that SM6T12CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T12CAHE3/5B 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 SM6T12CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SM6T12CAHE3/5B?
All SM6T12CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T12CAHE3/5B, 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 SM6T12CAHE3/5B part is unused and in its original packaging.
Return procedure for SM6T12CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T12CAHE3/5B Tags
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