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Taiwan Semiconductor Corporation 1.5SMC6.8CH
- Part No.:
- 1.5SMC6.8CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CH.pdf
- Description:
- 1500W, 6.8V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,654
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Product details
Overview
1.5SMC6.8CH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It delivers 1500W peak pulse power handling, 6.12–7.48V breakdown voltage at 10mA test current, 5.5V working stand-off voltage, clamps to ≤10.8V at 1000A peak impulse current, and features glass-passivated junction with AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1.5SMC6.8CH datasheet, 1.5SMC6.8CH pinout, 1.5SMC6.8CH application, or 1.5SMC6.8CH equivalent, this device is selected for robust ESD and surge immunity in automotive infotainment power supplies, industrial sensor interfaces, and telecom line-card front-ends where fast response (<1ps), low leakage (<1000µA @ 5.5V), and DO-214AB package compatibility are critical.
Technical Context
This TVS operates as a unidirectional clamping device with cathode-anode polarity marked on the DO-214AB case. Its silicon junction is glass passivated for stable leakage and long-term reliability under repeated transients. The device meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements and supports automotive-grade thermal cycling from –55°C to +150°C junction temperature.
It exhibits a 0.057%/°C temperature coefficient of VBR, enabling predictable voltage drift across operating range. With RθJA = 50°C/W and RθJC = 15°C/W, it supports high-power transient absorption while maintaining safe junction temperatures under sustained ambient conditions up to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 10mA | 6.12–7.48V - defines minimum and maximum guaranteed breakdown threshold under standard test conditions |
| VWM | 5.5V - maximum continuous reverse voltage before significant leakage begins; sets safe operating margin below breakdown |
| IPPM | 1000A - peak impulse current it can safely clamp without failure, per 10/1000μs waveform |
| VC @ IPPM | ≤10.8V - clamped voltage during full-rated surge, determining protected circuit's maximum stress level |
| PPK | 1500W - peak pulse power dissipation capability, defining transient energy absorption capacity |
| IR @ VWM | <1000µA - reverse leakage at stand-off voltage, critical for low-power and battery-backed systems |
| TJ max | +150°C - maximum junction temperature, enabling operation in under-hood or enclosed industrial environments |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR |
| Anode | Reference / return path | Typically tied to system ground or low-impedance return; completes clamping path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and infotainment systems |
| Clamping time <1.0ps | Enables protection of high-speed digital interfaces and RF-sensitive circuits against nanosecond-scale ESD events |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Guarantees survivability against real-world automotive load-dump and inductive-switching transients |
| Moisture sensitivity level 1 (J-STD-020) | Allows unlimited floor life and reflow compatibility without dry-pack or baking requirements |
| RoHS and halogen-free (IEC 61249-2-21) | Complies with global environmental regulations and enables use in green manufacturing programs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 5V supply rail of an automotive rear-view camera module from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp surges before they reach LDO regulators and image sensors. Use Value: Limits transient voltage to ≤10.8V, preventing latch-up or permanent damage to downstream 5V logic and analog components. |
Use Scenario: Safeguarding RS-485 transceiver inputs in factory automation PLC I/O modules exposed to motor switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping (via CH suffix variant) across differential bus lines to absorb common-mode surges. Use Value: Maintains signal integrity by suppressing >1kV transients within <1ps, avoiding communication errors or transceiver reset. |
| Telecom Line Card Front-End | Consumer USB Power Delivery Port |
Use Scenario: Shielding Ethernet PHY power pins in telecom access equipment from lightning-induced surges on PoE lines. IC Role / Device Role / Timing Role: Primary-stage TVS on 3.3V/5V bias rails feeding magnetics and PHY ICs. Use Value: Absorbs 1500W pulses without degradation, preserving PHY functionality during field-deployed surge events. |
Use Scenario: Adding secondary-level overvoltage protection on VBUS line of USB-C PD sink port in portable audio devices. IC Role / Device Role / Timing Role: Fast-clamping TVS placed after primary fuse and upstream of buck converter input. Use Value: Clamps ESD strikes (±15kV contact) to <10.8V, preventing gate oxide damage to power FETs and controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | 600W rating, SMB package (smaller footprint), lower IPPM (100A vs. 1000A), same VBR range | Suitable for space-constrained consumer designs with lower surge exposure | Select when board area is limited and peak surge energy is ≤600W |
| 1.5KE6.8C | Through-hole DO-201 package, identical 1500W rating and VBR, but slower response (~1ns) and higher thermal resistance | Fits legacy through-hole production or high-reliability military/aerospace boards requiring axial leaded parts | Choose for through-hole assembly or where DO-201 mechanical robustness is prioritized over SMT automation |
Compared with 1.5SMC6.8CH, SMBJ6.8A trades surge capacity for compactness, while 1.5KE6.8C retains full power rating but sacrifices mounting flexibility and speed-making 1.5SMC6.8CH optimal for automated, high-energy, surface-mount automotive and industrial protection.
Availability
1.5SMC6.8CH is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial sensor interfaces, and telecom line-card front-ends requiring stable component supply, AEC-Q101 compliance, and DO-214AB packaging.
Supply support for 1.5SMC6.8CH 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, rectifiers, and MOSFETs with global distribution and AEC-Q101 validation capabilities.
The 1.5SMC series was engineered specifically for high-energy, surface-mount transient suppression in automotive and industrial environments-balancing clamping speed, power density, and process reliability in DO-214AB packaging.
FAQ
What is the polarity configuration of the 1.5SMC6.8CH?
The 1.5SMC6.8CH is a unidirectional TVS diode with cathode-anode polarity. The cathode is marked by a band on the DO-214AB package and must be connected toward the protected line, while the anode connects to ground. This configuration ensures conduction only during positive transients on the protected node relative to ground.
Does the 1.5SMC6.8CH meet automotive qualification standards?
Yes, the 1.5SMC6.8CH is AEC-Q101 qualified and tested to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its glass-passivated junction, moisture sensitivity level 1 rating, and –55°C to +150°C operating range make it suitable for under-hood and body-control module applications where reliability under harsh conditions is mandatory.
What is the maximum clamping voltage of the 1.5SMC6.8CH at its rated surge current?
The 1.5SMC6.8CH clamps to a maximum of 10.8V at 1000A peak impulse current (IPPM) under the standardized 10/1000μs waveform. This value is guaranteed across temperature and lot variations, ensuring downstream 5V or 3.3V ICs remain within absolute maximum ratings during surge events.
Can the 1.5SMC6.8CH be used in bidirectional configurations?
No-the 1.5SMC6.8CH is unidirectional. For bidirectional protection, Taiwan Semiconductor offers the 1.5SMC6.8AH variant (with "AH" suffix), which provides symmetrical clamping in both polarities and is explicitly intended for AC-coupled or floating-line applications such as RS-485 or CAN bus protection.
What is the thermal resistance profile of the 1.5SMC6.8CH?
The 1.5SMC6.8CH has a junction-to-ambient thermal resistance (RθJA) of 50°C/W and junction-to-case resistance (RθJC) of 15°C/W. These values assume standard PCB layout with recommended pad dimensions per DO-214AB footprint; actual performance depends on copper area, layer count, and airflow in the final assembly.
1.5SMC6.8CH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5.5V
- Voltage - Breakdown (Min):
- 6.12V
- Voltage - Clamping (Max) @ Ipp:
- 10.8V
- Current - Peak Pulse (10/1000µs):
- 145A
- 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)
1.5SMC6.8CH FAQ
1.How can I place an order for 1.5SMC6.8CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CH 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 1.5SMC6.8CH reliable?
The price and inventory of 1.5SMC6.8CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CH?
1.5SMC6.8CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CH 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 1.5SMC6.8CH?
For technical support, including 1.5SMC6.8CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CH requirements.
6.How does Aetrix verify that 1.5SMC6.8CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CH 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 1.5SMC6.8CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CH?
All 1.5SMC6.8CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CH, 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 1.5SMC6.8CH part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CH Tags
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