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Vishay General Semiconductor - Diodes Division 1.5SMC6.8CA-M3/9AT
- Part No.:
- 1.5SMC6.8CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CA-M3/9AT.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,418
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Product details
Overview
1.5SMC6.8CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 6.8 V breakdown voltage (VBR min = 6.45 V), 5.8 V stand-off voltage (VWM), 10.5 V clamping voltage (VC) at 143 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC6.8CA-M3/9AT datasheet, 1.5SMC6.8CA-M3/9AT pinout, 1.5SMC6.8CA-M3/9AT application, or 1.5SMC6.8CA-M3/9AT equivalent, this component delivers verified bidirectional clamping performance, halogen-free RoHS compliance (M3 suffix), SMC (DO-214AB) surface-mount package compatibility, and AEC-Q101 qualification readiness - critical for high-reliability board-level ESD and lightning transient protection design.
Technical Context
The 1.5SMC6.8CA-M3/9AT operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction enables fast response time (<1 ps) and low incremental surge resistance, supporting repetitive 0.01% duty-cycle surges per JEDEC standards.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, with maximum junction temperature of +150 °C and operating range from –65 °C to +150 °C. It is rated for 6.5 W steady-state power dissipation on infinite heatsink at 50 °C ambient and meets MSL Level 1 per J-STD-020 (peak reflow 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise avalanche initiation threshold for bidirectional clamping |
| VWM | 5.8 V - maximum continuous reverse voltage before leakage exceeds 1000 µA, ensuring no conduction during normal operation |
| VC @ IPPM | 10.5 V at 143 A - clamped voltage under 1500 W 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capacity, enabling protection against IEC 61000-4-5 Level 4 surges |
| IPPM | 143 A - maximum non-repetitive peak pulse current, validated with derating above 25 °C ambient |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood automotive and industrial enclosures |
| Package | SMC (DO-214AB) - standardized 8.13 mm × 6.22 mm surface-mount outline with matte tin-plated leads, compatible with automated placement |
Pinout & Package
Package: SMC (DO-214AB), bidirectional device - no polarity marking; symmetrical terminal configuration with cathode/anode roles interchangeable per direction of transient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Interchangeable connection point - conducts in either direction when VWM exceeded; requires no orientation during placement |
| Terminal 2 | Cathode / Anode (bidirectional) | Interchangeable connection point - forms symmetrical clamping path across protected line and ground or differential pair |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., RS-485), and ungrounded sensor outputs without polarity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4th-level surge (4 kV/2 Ω) on 12 V systems with margin, reducing need for cascaded protection stages |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and supports environmentally regulated industrial and automotive supply chains |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile use (peak 260 °C), eliminating bake-out steps in high-volume SMT assembly |
| AEC-Q101 qualification ready | Base P/NHM3 variant (e.g., 1.5SMC6.8CAHM3_A/I) is AEC-Q101 qualified - same die and construction as 1.5SMC6.8CA-M3/9AT |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground, clamping transients within nanoseconds before IC damage occurs. Use Value: Maintains VC ≤ 10.5 V during 143 A surge, keeping protected transceiver input below absolute maximum ratings while surviving >1000 surges. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS shunting transient energy to ground during 10/1000 µs events on discrete input channels. Use Value: Delivers 1500 W pulse handling with <1 ps response, preventing false triggering and latch-up in optocoupler input stages. |
| Telecom Line Interface | Consumer Power Adapter ESD |
|
Use Scenario: Protecting Ethernet PHY magnetics and PoE injectors from lightning-induced common-mode surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional clamp across differential pairs (e.g., ETH_MDIO/MDI) referenced to local ground plane. Use Value: Symmetric VBR (6.45–7.14 V) ensures balanced clamping on both lines, preserving signal integrity while limiting surge voltage to 10.5 V. |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters and wall chargers exposed to user-handling ESD and output short-circuit transients. IC Role / Device Role / Timing Role: Final-stage TVS on 5–20 V output rails, absorbing residual spikes after primary-side regulation and filtering. Use Value: Halogen-free M3 construction complies with IEC 62368-1 flammability and environmental requirements for end-user power products. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA | Lower peak power (600 W), smaller SMB (DO-214AA) package, identical VBR/VC specs | Preferred for space-constrained designs where 1500 W margin is not required (e.g., low-energy consumer ports) | Select SMBJ6.8CA only if PCB layout restricts SMC footprint and surge threat level is ≤ IEC 61000-4-5 Level 2 |
| 1.5KE6.8CA | Through-hole TO-218 package, same electrical specs but higher thermal mass and manual assembly requirement | Suitable for legacy industrial controls, repair kits, or prototyping where SMT is unavailable | Choose 1.5KE6.8CA when through-hole mounting is mandated or when higher single-pulse energy absorption (non-repetitive) is prioritized over board density |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CA-M3/9AT uniquely balances 1500 W surge capability, SMC's automated assembly compatibility, and halogen-free compliance - making it optimal for high-volume automotive and industrial SMT production where reliability, manufacturability, and regulatory alignment are jointly critical.
Availability
1.5SMC6.8CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC6.8CA-M3/9AT 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 high-reliability diodes, MOSFETs, and passive components for demanding industrial, automotive, and computing applications.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - delivering high-power surge handling, AEC-Q101 readiness, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of the 1.5SMC6.8CA-M3/9AT under maximum surge conditions?
The 1.5SMC6.8CA-M3/9AT has a maximum clamping voltage (VC) of 10.5 V at 143 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the 1.5SMC6.8CA-M3/9AT suitable for automotive applications?
Yes - the 1.5SMC6.8CA-M3/9AT uses the same die and construction as AEC-Q101 qualified variants (e.g., 1.5SMC6.8CAHM3_A/I). While the -M3/9AT suffix itself denotes halogen-free RoHS compliance and tape-and-reel packaging, its electrical and thermal specifications fully align with automotive-grade requirements including operating temperature (–65 °C to +150 °C) and surge robustness.
Does the 1.5SMC6.8CA-M3/9AT have polarity markings?
No - the 1.5SMC6.8CA-M3/9AT is a bidirectional TVS diode and carries no polarity marking (e.g., cathode band). Its symmetrical construction allows installation in either orientation across protected lines, simplifying layout and eliminating orientation errors during automated placement.
What is the meaning of the "M3" and "9AT" suffixes in 1.5SMC6.8CA-M3/9AT?
The "M3" suffix indicates halogen-free, RoHS-compliant construction per IPC-1752A; "9AT" specifies packaging in 13-inch diameter plastic tape and reel, with 3500 units per reel. This configuration supports high-speed pick-and-place assembly and satisfies environmental compliance requirements for global industrial and automotive supply chains.
How does the 1.5SMC6.8CA-M3/9AT compare to unidirectional versions like 1.5SMC6.8A-M3/9AT?
The 1.5SMC6.8CA-M3/9AT provides identical VBR, VWM, and VC values as its unidirectional counterpart but operates symmetrically in both directions - essential for protecting AC-coupled, differential, or floating signal paths. Unidirectional types require correct polarity alignment and are limited to DC-biased lines.
1.5SMC6.8CA-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 143A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC6.8CA-M3/9AT FAQ
1.How can I place an order for 1.5SMC6.8CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CA-M3/9AT 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 1.5SMC6.8CA-M3/9AT reliable?
The price and inventory of 1.5SMC6.8CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CA-M3/9AT?
1.5SMC6.8CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CA-M3/9AT 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 1.5SMC6.8CA-M3/9AT?
For technical support, including 1.5SMC6.8CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC6.8CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CA-M3/9AT 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 1.5SMC6.8CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CA-M3/9AT?
All 1.5SMC6.8CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CA-M3/9AT, 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 1.5SMC6.8CA-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CA-M3/9AT Tags
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