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Vishay General Semiconductor - Diodes Division SM6T6V8CAHE3_A/I
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- Part No.:
- SM6T6V8CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T6V8CAHE3_A/I.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,532
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Product details
Overview
SM6T6V8CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 6.8 V breakdown voltage (VBR), 5.8 V stand-off voltage (VWM), 10.5 V max clamping voltage (VC) at 57 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect automotive sensor interfaces, industrial I/O lines, and USB/RS-485 data paths.
For engineers reviewing the SM6T6V8CAHE3_A/I datasheet, SM6T6V8CAHE3_A/I pinout, SM6T6V8CAHE3_A/I application, or SM6T6V8CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.54), SMB footprint compatibility, and 150 °C maximum junction temperature for under-hood deployment.
Technical Context
This device operates as a voltage-clamped shunt protector: during overvoltage events exceeding VWM = 5.8 V, it avalanches symmetrically in both directions to limit transient voltage to ≤10.5 V at 57 A. Its glass-passivated junction ensures stable breakdown and low leakage (<1000 μA at VWM), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The SM6T6V8CAHE3_A/I is engineered for fast response (sub-nanosecond turn-on) and low dynamic impedance, enabling effective suppression of inductive switching spikes and ESD pulses per IEC 61000-4-2 (±15 kV air, ±8 kV contact). Its thermal resistance (RθJA = 100 °C/W) requires minimal PCB copper area for 5 W steady-state dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise avalanche initiation threshold in both directions |
| VWM | 5.80 V - maximum continuous reverse voltage before leakage exceeds 1000 μA |
| VC @ IPPM | 10.5 V at 57 A (10/1000 μs) - clamping voltage limiting downstream IC stress during surge |
| PPPM | 600 W - peak transient power handling capacity without failure |
| TJ max. | +150 °C - enables operation in automotive engine compartments and industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, no polarity marking for bidirectional configuration, compliant with UL 94 V-0 flammability rating and J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connected to system ground or common reference; conducts during positive or negative overvoltage |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA devices; forms symmetrical clamping junction with Anode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without polarity concerns |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1 (−150 V/50 Ω) and Pulse 3a/b (±100 V) without degradation |
| AEC-Q101 qualification | Validated for automotive applications including powertrain control modules and ADAS sensor hubs |
| Low clamping ratio (VC/VBR) | 1.54 ensures minimal overvoltage margin above breakdown, reducing risk to 3.3 V/5 V logic interfaces |
| MSL Level 1 | Supports standard SMT reflow profiles up to 260 °C peak, eliminating moisture sensitivity handling requirements |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and pressure/temperature sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed between signal line and chassis ground to clamp transients before reaching sensitive analog front-end. Use Value: Limits voltage to ≤10.5 V during 57 A surges, preserving sensor accuracy and preventing MCU reset from overvoltage-induced latch-up. | Use Scenario: Safeguarding 24 V digital input modules in PLCs against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across input terminals to divert >1 kV spikes away from optocoupler input stages. Use Value: Maintains functional safety integrity by ensuring input stage survives repeated 600 W transients per IEC 61000-4-5 Level 3 (2 kV) |
| USB 2.0 Data Line Protection | RS-485 Transceiver Protection |
Use Scenario: ESD hardening of D+/D− lines in automotive infotainment USB ports subjected to ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector to absorb ESD energy before signal integrity degrades. Use Value: Clamps ESD events within <1 ns while adding <0.5 pF parasitic capacitance - no impact on 480 Mbps signaling eye diagram. | Use Scenario: Surge protection for half-duplex RS-485 nodes in factory automation networks exposed to lightning-induced ground potential differences. IC Role / Device Role / Timing Role: Differential-mode TVS across A/B lines plus common-mode TVS to ground, using SM6T6V8CAHE3_A/I for symmetry. Use Value: Enables compliance with ANSI/TIA-485-A surge immunity (4 kV common-mode) while maintaining DC bias stability via matched VBR tolerance (±5%). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8CA | Same VBR (6.8 V) and SMB package, but lower PPPM = 400 W and no AEC-Q101 qualification | Not suitable for automotive under-hood use; limited to commercial-grade industrial controls | Select when cost sensitivity outweighs automotive reliability requirements and surge energy is ≤400 W |
| 1.5KE6.8CA | Higher PPPM = 1500 W but DO-204AC (DO-15) through-hole package - incompatible with SMT assembly | Requires manual soldering or wave soldering; unsuitable for high-density PCBs or automated production | Choose only for legacy through-hole designs where board real estate allows larger footprint and hand-assembly is acceptable |
Compared with SMAJ6.8CA and 1.5KE6.8CA, SM6T6V8CAHE3_A/I uniquely combines AEC-Q101 qualification, 600 W surge rating, and SMB surface-mount compatibility - making it the only option qualified for volume automotive electronics requiring zero rework and full process traceability.
Availability
SM6T6V8CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC inputs, USB 2.0 interface protection, and RS-485 communication nodes requiring stable component supply across multi-year production cycles.
Supply support for SM6T6V8CAHE3_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 SM6T Series is designed specifically for robust transient voltage suppression in automotive, industrial, and communications systems - prioritizing AEC-Q101 compliance, low clamping voltage, and high surge endurance in compact SMB packaging.
FAQ
What does the "CA" suffix indicate in SM6T6V8CAHE3_A/I?
The "CA" suffix in SM6T6V8CAHE3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM6T6V8A), this part has no cathode marking and functions identically in either polarity, making it ideal for AC signal lines like CAN, RS-485, or USB differential pairs. The SM6T6V8CAHE3_A/I achieves this via a back-to-back diode structure integrated into a single SMB package.
Is SM6T6V8CAHE3_A/I suitable for automotive applications?
Yes, SM6T6V8CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101-qualified construction. It meets stringent requirements for temperature cycling, highly accelerated life testing (HALT), and surge robustness needed in engine control units, body electronics, and ADAS sensor interfaces. Its 150 °C maximum junction temperature and MSL Level 1 rating further validate suitability for under-hood and dashboard-mounted systems.
What is the clamping voltage of SM6T6V8CAHE3_A/I at its rated peak pulse current?
The SM6T6V8CAHE3_A/I has a maximum clamping voltage (VC) of 10.5 V when subjected to its rated peak pulse current (IPPM) of 57 A under the standard 10/1000 μs waveform. This value is measured across the device terminals during transient conduction and represents the upper voltage limit imposed on protected circuitry - critical for ensuring compatibility with 3.3 V or 5 V logic interfaces without overstressing downstream components.
How does the SM6T6V8CAHE3_A/I differ from the unidirectional SM6T6V8A?
The SM6T6V8CAHE3_A/I differs from SM6T6V8A primarily in polarity configuration and marking: SM6T6V8CAHE3_A/I is bidirectional with no polarity band and symmetric VBR characteristics, while SM6T6V8A is unidirectional with a cathode band and conducts only in reverse bias. Both share identical VBR (6.45–7.14 V), VWM (5.80 V), and PPPM (600 W), but SM6T6V8CAHE3_A/I supports AC-coupled or differential signal protection without orientation constraints - essential for USB, CAN, and RS-485 implementations.
What PCB pad layout is recommended for optimal thermal performance of SM6T6V8CAHE3_A/I?
Vishay specifies a minimum mounting pad layout of 0.086" × 0.060" (2.18 mm × 1.52 mm) per terminal for SM6T6V8CAHE3_A/I, with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads recommended for thermal derating validation. Adhering to this layout ensures the specified RθJA = 100 °C/W is achieved and supports reliable operation at 5 W steady-state dissipation. Deviation from these dimensions increases junction temperature and may reduce surge endurance during repetitive transient events.
SM6T6V8CAHE3_A/I 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 57A
- 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)
SM6T6V8CAHE3_A/I FAQ
1.How can I place an order for SM6T6V8CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T6V8CAHE3_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 SM6T6V8CAHE3_A/I reliable?
The price and inventory of SM6T6V8CAHE3_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 SM6T6V8CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T6V8CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T6V8CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T6V8CAHE3_A/I?
SM6T6V8CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T6V8CAHE3_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 SM6T6V8CAHE3_A/I?
For technical support, including SM6T6V8CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T6V8CAHE3_A/I requirements.
6.How does Aetrix verify that SM6T6V8CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T6V8CAHE3_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 SM6T6V8CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T6V8CAHE3_A/I?
All SM6T6V8CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T6V8CAHE3_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 SM6T6V8CAHE3_A/I part is unused and in its original packaging.
Return procedure for SM6T6V8CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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