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Vishay General Semiconductor - Diodes Division 1.5SMC6.8CAHE3_A/H
- Part No.:
- 1.5SMC6.8CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CAHE3_A/H.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,036
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Product details
Overview
1.5SMC6.8CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in power and signal lines. It features a 6.8 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 10.5 V clamping voltage at 143 A peak pulse current, and operates across –65 °C to +150 °C junction temperature - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC6.8CAHE3_A/H datasheet, 1.5SMC6.8CAHE3_A/H pinout, 1.5SMC6.8CAHE3_A/H application, or 1.5SMC6.8CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, and compliance with UL 497B for telecom and automotive surge standards.
Technical Context
This device uses a glass-passivated silicon junction to achieve fast response (<1 ns) and low incremental surge resistance, enabling effective suppression of lightning-induced transients and inductive switching spikes. Its bidirectional architecture ensures symmetrical clamping in both polarities without polarity marking on the case.
Rated for 1500 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, it sustains repetitive surges when mounted on 8.0 mm × 8.0 mm copper pads and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
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 both directions |
| VWM | 5.80 V - maximum continuous reverse stand-off voltage before leakage exceeds 1000 µA; sets safe operating margin below clamping |
| VC @ IPPM | 10.5 V at 143 A - clamped voltage during 1500 W transient, limiting downstream IC stress to sub-11 V during worst-case surge |
| IPPM | 143 A - peak pulse current handling capacity under standardized 10/1000 µs waveform, validated with derating above 25 °C |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive and high-ambient industrial environments |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint, compatible with automated placement and IPC-7351B land patterns |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional clamp | Connected to protected line (e.g., CAN_H or RS-485 A); forms symmetrical conduction path with cathode |
| Cathode | Current exit terminal in forward bias; common node in bidirectional clamp | Connected to protected line (e.g., CAN_L or RS-485 B); enables equal clamping voltage magnitude in either polarity |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or AC-coupled lines (e.g., CAN, RS-485) without polarity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 2 Ω source impedance when properly laid out |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS sensor modules requiring zero-defect reliability |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage stress on downstream 5 V or 3.3 V logic, reducing need for additional series impedance |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing flow |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs against load dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry to shunt surge energy before reaching PHY layer. Use Value: Clamps transients to ≤10.5 V while maintaining signal integrity for 5 V tolerant transceivers - no data corruption during 10/1000 µs surge events. |
Use Scenario: Safeguarding half-duplex RS-485 nodes in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Differential-line TVS across A/B bus lines to suppress common-mode surges without affecting DC bias or data eye. Use Value: Symmetrical 6.8 V breakdown ensures balanced clamping on both lines, preserving differential voltage margin for reliable >10 Mbps communication. |
| Telecom DSL Line Protection | Consumer USB Port ESD |
Use Scenario: Front-end protection of ADSL/VDSL line drivers against lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary surge limiter in hybrid coupler interface, coordinated with gas discharge tube (GDT) for staged protection. Use Value: 1500 W rating handles 10/700 µs telecom surges per ITU-T K.20; UL 497B recognition supports regulatory certification. |
Use Scenario: Board-level ESD protection for USB 2.0 D+/D– lines in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional clamp placed adjacent to connector to meet IEC 61000-4-2 ±15 kV contact discharge. Use Value: Sub-11 V clamping prevents latch-up in USB transceivers while adding <0.3 pF parasitic capacitance per line - no signal integrity degradation. |
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 and SMC-compatible SMB (DO-214AA) package | Not qualified to AEC-Q101; suitable for commercial-grade consumer or computing applications only | Select when cost sensitivity outweighs automotive or industrial surge margin requirements |
| 1.5KE6.8CA | Higher package profile (DO-201AD), 1500 W rating, but leaded through-hole mounting | Requires PCB redesign for SMT transition; not compliant with modern automated assembly lines | Choose only for legacy repair, prototyping, or applications where board space permits axial-leaded devices |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CAHE3_A/H delivers AEC-Q101 qualification, SMC surface-mount compatibility, and identical 1500 W surge rating - making it the sole option meeting automotive production, high-density layout, and regulatory compliance simultaneously.
Availability
1.5SMC6.8CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, telecom line interfaces, and consumer USB port hardening requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5SMC6.8CAHE3_A/H 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 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the 1.5SMC6.8CAHE3_A/H under maximum surge conditions?
The 1.5SMC6.8CAHE3_A/H clamps to 10.5 V at its rated peak pulse current of 143 A (10/1000 µs waveform). This value is measured per Figure 1 in Vishay document 88303 and represents the maximum voltage seen by downstream circuitry during a full 1500 W transient event. The 1.5SMC6.8CAHE3_A/H maintains this clamping performance across its specified operating temperature range when mounted per recommended pad layout.
Is the 1.5SMC6.8CAHE3_A/H suitable for automotive applications?
Yes, the 1.5SMC6.8CAHE3_A/H is AEC-Q101 qualified, as indicated by the "HE3" suffix and confirmed in Vishay's ordering information table. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev G, making it appropriate for under-hood and chassis-mounted automotive electronics including ADAS sensors and body control modules.
How does the bidirectional design of the 1.5SMC6.8CAHE3_A/H affect its use in differential signaling lines?
The 1.5SMC6.8CAHE3_A/H provides symmetrical clamping in both polarities, allowing direct placement across differential pairs like RS-485 A/B or CAN_H/CAN_L without polarity orientation concerns. Its matched VBR (6.45–7.14 V) and VC (10.5 V) ensure balanced voltage limiting, preserving differential swing and preventing common-mode shift during surge events - critical for noise-immune serial communication.
What is the thermal resistance of the 1.5SMC6.8CAHE3_A/H, and how does it impact power dissipation?
The 1.5SMC6.8CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended copper pads. At ambient temperatures above 25 °C, its 6.5 W steady-state power dissipation derates linearly - for example, at 70 °C ambient, usable power drops to ~3.5 W. This must be considered in thermally constrained layouts where sustained leakage or frequent surges occur.
Does the 1.5SMC6.8CAHE3_A/H require special PCB layout considerations?
Yes - optimal performance requires mounting the 1.5SMC6.8CAHE3_A/H on 8.0 mm × 8.0 mm copper pads per terminal, as specified in Vishay's thermal derating curves. Short, wide traces to ground/power planes minimize inductance and preserve clamping speed; routing should avoid vias or narrow necks between the device and protected node. The 1.5SMC6.8CAHE3_A/H achieves full 1500 W rating only with this layout.
1.5SMC6.8CAHE3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC6.8CAHE3_A/H FAQ
1.How can I place an order for 1.5SMC6.8CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CAHE3_A/H 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 1.5SMC6.8CAHE3_A/H reliable?
The price and inventory of 1.5SMC6.8CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CAHE3_A/H?
1.5SMC6.8CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CAHE3_A/H 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 1.5SMC6.8CAHE3_A/H?
For technical support, including 1.5SMC6.8CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CAHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC6.8CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CAHE3_A/H 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 1.5SMC6.8CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CAHE3_A/H?
All 1.5SMC6.8CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CAHE3_A/H, 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 1.5SMC6.8CAHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CAHE3_A/H Tags
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