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Vishay General Semiconductor - Diodes Division 1.5SMC6.8CAHM3/I
- Part No.:
- 1.5SMC6.8CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CAHM3/I.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,059
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Product details
Overview
1.5SMC6.8CAHM3/I 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 at 143 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC6.8CAHM3/I datasheet, 1.5SMC6.8CAHM3/I pinout, 1.5SMC6.8CAHM3/I application, or 1.5SMC6.8CAHM3/I equivalent, this device delivers AEC-Q101-qualified reliability in SMC (DO-214AB) package with halogen-free RoHS compliance, low incremental surge resistance, and fast sub-nanosecond response for lightning and inductive switching transients.
Technical Context
The 1.5SMC6.8CAHM3/I operates as a bidirectional clamping device, symmetrically suppressing voltage surges in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1000 µA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C peak.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The 10/1000 µs waveform rating reflects standardized surge immunity per ANSI/IEEE C62.35, with derating applied above 25 °C ambient per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 6.45 V min / 7.14 V max at 10 mA - defines precise clamping onset threshold under controlled test conditions |
| Stand-off Voltage VWM | 5.8 V - maximum continuous reverse voltage before significant leakage begins; sets safe operating margin below VBR |
| Clamping Voltage VC | 10.5 V at 143 A IPPM - actual voltage seen by protected circuit during worst-case 10/1000 µs surge |
| Peak Pulse Power PPPM | 1500 W - surge energy handling capacity for transient events per industry-standard waveform |
| Package | SMC (DO-214AB) - surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement for rated power dissipation |
| Operating Temperature | –65 °C to +150 °C - enables deployment in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical PN junction; conducts during negative-going surges |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical PN junction; conducts during positive-going surges |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal/power lines without polarity concerns |
| 1500 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes voltage overshoot across protected ICs or MOSFETs during surge events |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for automotive and industrial end-equipment |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free assembly processes without pre-baking or special handling |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or supply rail to clamp ±100 V surges within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in downstream ASICs by limiting transient voltage to ≤10.5 V at 143 A. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-connected TVS shunting surge current away from optocoupler input or Schmitt trigger input stage. Use Value: Maintains functional integrity under IEC 61000-4-4 EFT (4 kV) and IEC 61000-4-5 surge (2 kV) testing without derating. |
| Telecom Line Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding Ethernet PHY interface transformers and PoE injectors from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Common-mode TVS array element (used in pairs) across transformer center taps or data lines. Use Value: Clamps induced transients to <11 V while preserving signal integrity up to 100 MHz due to low junction capacitance (~1000 pF @ 0 V). |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Across-motor terminals or DC bus rails to absorb stored inductive energy during MOSFET turn-off. Use Value: Eliminates need for snubber RC networks by absorbing 1500 W pulses with <1 ns response, reducing BOM count and board space. |
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 PPPM (600 W), same VBR/VC, SMB (DO-214AA) package - 30% smaller footprint, lower thermal mass | Best suited for space-constrained consumer electronics where 600 W surge margin suffices | Select when PCB area is critical and surge threat level is moderate (e.g., IEC 61000-4-2 contact discharge only) |
| 1.5KE6.8CA | Same 1500 W rating but axial-leaded DO-201AD package - higher RθJA (100 °C/W), no SMT compatibility | Used in legacy through-hole designs or prototyping where rework flexibility is prioritized over automation | Choose only for manual assembly or retrofit scenarios; not recommended for new SMT production |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CAHM3/I uniquely balances high-power surge capability (1500 W), AEC-Q101 qualification, halogen-free compliance, and SMC package thermal performance - making it the preferred choice for automotive and industrial SMT production requiring long-term supply stability and regulatory alignment.
Availability
1.5SMC6.8CAHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input modules, telecom infrastructure equipment, and consumer appliance motor control systems requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC6.8CAHM3/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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, 1500 W surge capability, and SMC package robustness are mandatory.
FAQ
What does the "HM3" suffix mean in 1.5SMC6.8CAHM3/I?
The HM3 suffix in 1.5SMC6.8CAHM3/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It denotes Vishay's commercial-grade automotive variant, distinct from E3 (RoHS only) and HE3 (AEC-Q101, non-halogen-free). The "I" denotes 13-inch tape-and-reel packaging (3500 units per reel), supporting high-volume SMT assembly.
Is 1.5SMC6.8CAHM3/I unidirectional or bidirectional?
The 1.5SMC6.8CAHM3/I is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number. It provides symmetrical clamping for both positive- and negative-polarity transients without polarity marking on the SMC (DO-214AB) package - essential for protecting AC-coupled or floating circuits like differential data lines or transformer-isolated supplies.
What is the maximum clamping voltage of 1.5SMC6.8CAHM3/I under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC6.8CAHM3/I is 10.5 V at 143 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the highest voltage imposed on the protected circuit during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Can 1.5SMC6.8CAHM3/I replace 1.5SMC6.8A in existing designs?
No - 1.5SMC6.8CAHM3/I is bidirectional, whereas 1.5SMC6.8A is unidirectional. Substituting them requires verifying circuit topology: unidirectional devices require cathode-anode orientation and protect only one polarity, while the CA version clamps both directions. Using 1.5SMC6.8CAHM3/I in place of 1.5SMC6.8A may cause unintended conduction in DC-biased rails.
What thermal pad layout is required for 1.5SMC6.8CAHM3/I to achieve full 1500 W rating?
To achieve the full 1500 W peak pulse power rating, 1.5SMC6.8CAHM3/I must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, per Vishay Document 88303 Figure 1. Smaller pads reduce thermal dissipation, derating both pulse power and average power (PD = 6.5 W) - especially critical in high-temperature ambient environments.
1.5SMC6.8CAHM3/I 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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC6.8CAHM3/I FAQ
1.How can I place an order for 1.5SMC6.8CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CAHM3/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 1.5SMC6.8CAHM3/I reliable?
The price and inventory of 1.5SMC6.8CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CAHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CAHM3/I?
1.5SMC6.8CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CAHM3/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 1.5SMC6.8CAHM3/I?
For technical support, including 1.5SMC6.8CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC6.8CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CAHM3/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 1.5SMC6.8CAHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CAHM3/I?
All 1.5SMC6.8CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CAHM3/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 1.5SMC6.8CAHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CAHM3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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