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Vishay General Semiconductor - Diodes Division 1.5SMC6.8CA-M3/57T
- Part No.:
- 1.5SMC6.8CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CA-M3/57T.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,675
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Product details
Overview
1.5SMC6.8CA-M3/57T 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), 1500 W peak pulse power (10/1000 µs), clamping voltage of 10.5 V at 143 A, and operates across -65 °C to +150 °C. It is widely deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC6.8CA-M3/57T datasheet, 1.5SMC6.8CA-M3/57T pinout, 1.5SMC6.8CA-M3/57T application, or 1.5SMC6.8CA-M3/57T equivalent, this page delivers verified electrical specs, SMC (DO-214AB) package details, bidirectional clamping behavior, thermal resistance (RθJA = 75 °C/W), and AEC-Q101-qualified halogen-free alternatives.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response (<1 ns) and low incremental surge resistance. Its symmetrical V-I characteristics enable identical clamping in both polarities, eliminating polarity concerns in AC-coupled or floating signal paths.
The device complies with J-STD-020 MSL Level 1 (260 °C peak reflow), supports automated SMT placement, and is rated for 1500 W peak pulse power under standardized 10/1000 µs waveform conditions - validated with 0.31" × 0.31" copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise voltage threshold where avalanche conduction begins in either direction |
| VWM | 5.80 V - maximum continuous reverse working voltage before leakage exceeds 1000 µA; sets safe operating margin below breakdown |
| VC @ IPPM | 10.5 V at 143 A - clamped voltage during 1500 W transient; determines protected circuit's maximum stress level |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform; enables suppression of lightning-induced surges and inductive switching spikes |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient; informs board-level thermal design when mounted on standard 8 mm × 8 mm copper pads |
| Package | SMC (DO-214AB) - surface-mount package with 2.06 mm height and 7.75 mm length; optimized for high-power density and automated assembly |
Pinout & Package
Package: SMC (DO-214AB), bidirectional configuration - no polarity marking; symmetrical terminals function as interchangeable anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on instantaneous polarity; no fixed polarity assignment |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path for ± transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or ungrounded lines without polarity constraints |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly laid out on PCB |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance requirements for automotive and industrial OEMs without compromising surge performance |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak - eliminates baking requirements |
| AEC-Q101 qualification option | Available in HM3 variant (e.g., 1.5SMC6.8CAHM3_A/H) for automotive-grade reliability validation |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to clamp ± transients before reaching signal conditioning ICs. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V interface ICs by limiting transient voltage to ≤10.5 V during 143 A surges. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and 0–10 V analog inputs in programmable logic controllers against field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Maintains signal integrity by suppressing >1 kV transients within nanoseconds while adding negligible capacitance (<100 pF) to low-bandwidth analog paths. |
| Telecom Line Card Protection | Consumer Power Adapter EMI Filter |
|
Use Scenario: Secondary surge protection on Ethernet PHY interfaces and DSL line drivers exposed to induced lightning surges. IC Role / Device Role / Timing Role: Back-to-back clamping element in conjunction with gas discharge tubes (GDTs) for staged protection architecture. Use Value: Provides fast-response secondary clamping after GDT fires, reducing let-through voltage to levels safe for Ethernet magnetics and PHY ICs. |
Use Scenario: Input-stage transient suppression in AC-DC adapters and USB-C PD chargers subjected to mains-borne surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across primary-side bulk capacitor or secondary-side DC output rails. Use Value: Absorbs 1500 W energy pulses without degradation, preventing overvoltage shutdown or capacitor rupture during EN 61000-4-5 testing. |
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), same VBR (6.45–7.14 V), SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer electronics but not for automotive or industrial surge classes requiring ≥1 kW | Select when board area is critical and surge threat level is limited to IEC 61000-4-2 ESD only |
| 1.5KE6.8CA | Higher RθJA (~100 °C/W), through-hole DO-201 package, same VBR/VC, 1500 W rating | Used in legacy designs or high-reliability power supplies where manual assembly or wave soldering is preferred | Choose for through-hole compatibility or when thermal mass of leadframe improves sustained surge handling |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CA-M3/57T delivers optimal balance of high-power SMT capability, low-profile packaging, and halogen-free compliance - making it the preferred choice for new automotive and industrial designs requiring AEC-Q101 readiness and automated manufacturing.
Availability
1.5SMC6.8CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC6.8CA-M3/57T 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent 1500 W clamping performance with AEC-Q101 qualification options and halogen-free material compliance.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC6.8CA-M3/57T?
The 1.5SMC6.8CA-M3/57T has a specified breakdown voltage range of 6.45 V to 7.14 V at 10 mA test current (VBR), representing a ±5% tolerance around the nominal 6.8 V rating. This tight tolerance ensures predictable clamping onset across production lots and temperature ranges from -65 °C to +150 °C.
Is the 1.5SMC6.8CA-M3/57T suitable for automotive applications?
Yes - the 1.5SMC6.8CA-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and an AEC-Q101-qualified variant (1.5SMC6.8CAHM3_A/H) is available. While the base M3/57T part itself is commercial-grade, its construction, thermal rating (+150 °C TJ), and surge capability align with automotive subsystem requirements when used per manufacturer layout guidelines.
How does the clamping voltage of the 1.5SMC6.8CA-M3/57T compare to its breakdown voltage?
The 1.5SMC6.8CA-M3/57T clamps to 10.5 V at its rated peak pulse current of 143 A, which is approximately 1.54× its minimum breakdown voltage (6.45 V). This clamping ratio reflects low dynamic impedance and ensures downstream ICs experience minimal overvoltage stress during transient events - critical for protecting 5 V and 3.3 V logic interfaces.
What is the mounting pad requirement for achieving the rated 1500 W pulse power of the 1.5SMC6.8CA-M3/57T?
To achieve the full 1500 W peak pulse power rating, the 1.5SMC6.8CA-M3/57T must be mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as defined in the Vishay datasheet. Smaller pads reduce heat dissipation and derate pulse power significantly - e.g., a 1.0 mm² pad may limit IPPM to <50 A instead of the rated 143 A.
Does the 1.5SMC6.8CA-M3/57T have polarity markings on the package?
No - the 1.5SMC6.8CA-M3/57T is a bidirectional TVS diode and carries no polarity marking (e.g., band or dot) on the SMC (DO-214AB) case. Its symmetrical construction allows either terminal to serve as anode or cathode depending on instantaneous voltage polarity, simplifying PCB layout and eliminating orientation errors during assembly.
1.5SMC6.8CA-M3/57T 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-M3/57T FAQ
1.How can I place an order for 1.5SMC6.8CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CA-M3/57T 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-M3/57T reliable?
The price and inventory of 1.5SMC6.8CA-M3/57T 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-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CA-M3/57T?
1.5SMC6.8CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CA-M3/57T 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-M3/57T?
For technical support, including 1.5SMC6.8CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC6.8CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CA-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CA-M3/57T?
All 1.5SMC6.8CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CA-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CA-M3/57T Tags
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Diodes Incorporated
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