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Taiwan Semiconductor Corporation 1.5SMC6.8AH
- Part No.:
- 1.5SMC6.8AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8AH.pdf
- Description:
- 1500W, 6.8V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,074
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Product details
Overview
1.5SMC6.8AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in DC power rails and signal lines. It features a 6.8V nominal breakdown voltage (6.46–7.14 V), 1500W peak pulse power rating, 10.5V maximum clamping voltage at 1000A, and DO-214AB (SMC) package - deployed in automotive infotainment power inputs and industrial sensor interface protection.
For engineers reviewing the 1.5SMC6.8AH datasheet, 1.5SMC6.8AH pinout, 1.5SMC6.8AH application, or 1.5SMC6.8AH equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, leakage current at operating voltage, AEC-Q101 qualification status, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive load-dump immunity.
Technical Context
This TVS operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified breakdown range (6.46–7.14 V @ 10 mA). Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1 µA @ 5.8 V), while sub-1 ps response time enables effective suppression of fast ESD transients per IEC 61000-4-2.
Thermal performance is defined by RθJA = 50°C/W and RθJC = 15°C/W, supporting sustained operation up to TJ = 150°C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - enabling reliable reflow soldering without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.46 V / 7.14 V @ 10 mA - defines precise overvoltage trip threshold with ±5% tolerance |
| VWM | 5.80 V - maximum continuous reverse working voltage; must exceed system operating voltage to avoid leakage-induced power loss |
| VC @ IPPM | 10.5 V @ 1000 A - clamping voltage during 10/1000 µs surge; determines maximum stress on downstream ICs |
| PPK | 1500 W - peak pulse power handling per 1 ms waveform; supports high-energy transients like ISO 7637-2 Pulse 5a |
| IR @ VWM | <1 µA - ultra-low reverse leakage ensures minimal standby current drain in battery-powered systems |
| TJ max | +150 °C - junction temperature limit enabling use in under-hood automotive environments |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band. Designed for automated placement and compatible with standard SMT reflow profiles (J-STD-002 compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential rail in unidirectional configuration; carries forward surge current up to 200 A (8.3 ms half-sine) |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 5V rail); initiates avalanche breakdown when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for front-end power protection in ADAS ECUs |
| Clamping voltage ≤10.5 V @ 1000 A | Ensures protected 5V logic interfaces remain below absolute maximum ratings during ISO 7637-2 Pulse 1 (inductive load dump) |
| Response time <1.0 ps | Enables suppression of nanosecond-scale ESD events (IEC 61000-4-2 ±8 kV contact discharge) before IC damage occurs |
| Moisture sensitivity Level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and avoiding thermal stress on PCB assemblies |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - required for export to EU and automotive OEM supply chains |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 5V power input of an automotive body control module (BCM) against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp transients exceeding 5.8 V. Use Value: Limits peak voltage to 10.5 V during 1000 A surges, preventing damage to downstream LDOs and microcontrollers rated for 6.5 V absolute max. |
Use Scenario: Shielding RS-485 transceiver data lines in factory automation PLCs from EFT and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional protection (using 1.5SMC6.8AH variant with CAH suffix) across differential pair to suppress common-mode transients. Use Value: Sub-1 ps response captures fast edge transients before they propagate into the transceiver's internal ESD structures. |
| Consumer USB Port Protection | Telecom DC Power Feeding |
Use Scenario: Safeguarding USB 2.0 VBUS line in portable docking stations against hot-plug induced voltage spikes and ESD. IC Role / Device Role / Timing Role: Unidirectional TVS connected from VBUS to GND, leveraging low 5.8 V working voltage to avoid interference with 5.0 V ±5% USB spec. Use Value: Leakage <1 µA at 5.8 V prevents battery drain in always-on USB-C accessories. |
Use Scenario: Protecting PoE-powered network switches from induced surges on 48 V DC feeding lines. IC Role / Device Role / Timing Role: TVS array using multiple 1.5SMC6.8AH devices in parallel to handle >3000 W aggregate surge energy. Use Value: 1500 W single-device rating allows scalable design with derated layout for enhanced reliability in outdoor telecom cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | Lower PPK = 600 W; SMB package (smaller footprint, higher RθJA = 85°C/W) | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to consumer-grade ESD-only use | Select when space-constrained and surge energy is ≤600 W; verify thermal margin in enclosed enclosures |
| 1.5KE6.8A | Through-hole DO-201 package; same VBR/VC specs but slower response (~1 ns) and no AEC-Q101 qualification | Excludes automotive under-hood use; requires wave soldering or hand assembly | Choose for legacy through-hole designs or non-automotive industrial controls where reflow compatibility is not required |
Compared with SMBJ6.8A and 1.5KE6.8A, the 1.5SMC6.8AH delivers 2.5× higher surge power handling, AEC-Q101 validation for automotive deployment, and surface-mount scalability - making it the preferred choice for new designs requiring robust, production-ready TVS protection in compact layouts.
Availability
1.5SMC6.8AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor nodes, and telecom power supplies requiring stable component supply, AEC-Q101 compliance, and high-reliability surge immunity.
Supply support for 1.5SMC6.8AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers - with global distribution and AEC-Q101-qualified product lines.
The 1.5SMC series was engineered specifically for high-energy transient suppression in automotive and industrial environments, emphasizing low clamping voltage, fast response, and process-controlled VBR consistency across voltage grades.
FAQ
What is the clamping voltage of the 1.5SMC6.8AH under a 1000 A transient?
The 1.5SMC6.8AH has a maximum clamping voltage (VC) of 10.5 V when subjected to a 1000 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 10.5 V during such a surge event - critical for protecting 5V-rated ICs. The 1.5SMC6.8AH achieves this while maintaining tight VBR tolerance (6.46–7.14 V) and low leakage.
Is the 1.5SMC6.8AH suitable for bidirectional transient protection?
No - the 1.5SMC6.8AH is a unidirectional TVS diode intended for DC line protection where polarity is fixed. For bidirectional applications (e.g., AC signal lines or differential buses), Taiwan Semiconductor specifies the 1.5SMC6.8CAH variant, which uses a center-tap configuration and symmetric breakdown in both directions. Using the 1.5SMC6.8AH in reverse-biased AC scenarios may result in unintended conduction or failure; always select the CAH suffix for true bidirectional capability.
Does the 1.5SMC6.8AH meet automotive qualification standards?
Yes - the 1.5SMC6.8AH is explicitly AEC-Q101 qualified and tested per ISO 7637-2 for Pulse 1, 2a, 2b, 3a, and 3b. It also complies with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - confirming suitability for automotive under-hood and cabin applications. These qualifications are documented in Taiwan Semiconductor's official B2207 datasheet revision and apply specifically to the 1.5SMC6.8AH part number.
What is the maximum steady-state power dissipation for the 1.5SMC6.8AH?
The 1.5SMC6.8AH has a steady-state power dissipation (PD) rating of 6.5 W at TA = 25°C. This value reflects continuous DC power handling capability - distinct from its 1500 W peak pulse rating. In practice, the device is not operated continuously at this level; instead, it remains near-zero power in standby and only dissipates energy briefly during transient events. Thermal design must account for RθJA = 50°C/W to ensure junction temperature stays within −55°C to +150°C limits.
How does the 1.5SMC6.8AH compare to the 1.5SMC6.8H variant?
The 1.5SMC6.8AH offers tighter breakdown voltage tolerance (6.46–7.14 V) versus the 1.5SMC6.8H (6.12–7.48 V), resulting in more predictable clamping behavior and reduced risk of premature triggering. Both share identical package (DO-214AB), PPK (1500 W), and VC (10.5 V vs. 10.8 V), but the "A" grade provides improved VBR consistency - making the 1.5SMC6.8AH preferable for precision-sensitive applications like automotive sensor power rails where margin to IC absolute maximum ratings is constrained.
1.5SMC6.8AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.46V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 150A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC6.8AH FAQ
1.How can I place an order for 1.5SMC6.8AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8AH 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 1.5SMC6.8AH reliable?
The price and inventory of 1.5SMC6.8AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8AH?
1.5SMC6.8AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8AH 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 1.5SMC6.8AH?
For technical support, including 1.5SMC6.8AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8AH requirements.
6.How does Aetrix verify that 1.5SMC6.8AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8AH 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 1.5SMC6.8AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8AH?
All 1.5SMC6.8AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8AH, 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 1.5SMC6.8AH part is unused and in its original packaging.
Return procedure for 1.5SMC6.8AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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