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Taiwan Semiconductor Corporation 1.5SMC6.8CA
- Part No.:
- 1.5SMC6.8CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CA.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,297
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Product details
Overview
1.5SMC6.8CA from Taiwan Semiconductor is a bidirectional 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 breakdown voltage (6.46–7.14V), 1500W peak pulse power rating, 10.5V clamping voltage at 1000A, and DO-214AB (SMC) package - used in telecom interface protection and industrial I/O modules.
For engineers reviewing the 1.5SMC6.8CA datasheet, 1.5SMC6.8CA pinout, 1.5SMC6.8CA application, or 1.5SMC6.8CA equivalent, key selection criteria include bidirectional clamping performance, low leakage (<1µA @ 5.8V), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and thermal resistance (RθJA = 50°C/W) for high-reliability board-level surge immunity.
Technical Context
The 1.5SMC6.8CA operates as a voltage-clamped avalanche diode with symmetrical bidirectional conduction, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response (<1.0ps), critical for suppressing ESD events per IEC 61000-4-2.
Designed for surface-mount automation, it meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1. Thermal performance is defined by RθJC = 15°C/W and RθJA = 50°C/W, supporting continuous operation up to TJ = 150°C in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 6.46V / 7.14V - defines precise avalanche initiation window for repeatable clamping onset |
| VWM | 5.80V - maximum continuous reverse operating voltage before leakage rises above 1µA |
| VC@IPPM | 10.5V @ 1000A - clamping voltage during 10/1000µs surge, limiting downstream IC stress |
| PPK | 1500W - peak pulse power handling per single 10/1000µs transient per Fig.5 |
| IR@VWM | <1µA - ultra-low leakage preserves battery life and signal integrity in always-on circuits |
| TJ max | 150°C - maximum junction temperature enabling use in under-hood or enclosed industrial enclosures |
| RθJA | 50°C/W - thermal resistance from junction to ambient, guiding heatsinking requirements on standard FR-4 |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Surge current path | Both terminals function identically; no polarity marking required - simplifies layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term VBR stability and low parameter drift over temperature and lifetime |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching transients without external filtering |
| Moisture Sensitivity Level 1 | Zero bake requirement before reflow - supports standard SMT assembly without dry-pack handling |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives for green manufacturing and end-of-life processing |
| Fast response time <1.0ps | Clamps ESD events (IEC 61000-4-2) before sensitive logic or analog circuitry sustains damage |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24V digital input channels in programmable logic controllers against inductive kickback and field wiring surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt transients before signal conditioning circuitry. Use Value: Withstands 1000A 10/1000µs pulses while clamping to 10.5V - keeps downstream optocoupler and MCU GPIO within safe operating limits. | Use Scenario: Safeguarding LIN bus transceivers and sensor inputs in body electronics exposed to battery load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary surge suppression element across power rail and data lines, meeting OEM-specific EMC immunity requirements. Use Value: Validated for ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a (battery disconnect), and Pulse 3b (capacitive discharge), eliminating need for supplemental RC networks. |
| Telecom Ethernet Port Protection | Consumer USB-C Power Delivery Interface |
Use Scenario: Shielding 10/100BASE-TX PHY differential pairs and bias rails from lightning-induced surges on outdoor-facing Ethernet ports. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to RJ45 magnetics to limit common-mode transients without degrading signal integrity. Use Value: Clamps to 10.5V within <1ps, preserving Ethernet eye diagram margin while surviving multi-kV surge tests per IEC 61000-4-5. | Use Scenario: Protecting CC, VBUS, and SBU pins in USB-C receptacles against hot-plug ESD and accidental 20V PD fault conditions. IC Role / Device Role / Timing Role: First-line defense against ±15kV contact ESD (IEC 61000-4-2) on high-speed, space-constrained connectors. Use Value: Sub-1µA leakage at 5.8V prevents false VBUS detection; DO-214AB footprint enables placement within 2mm of USB-C shell ground. |
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 (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600W; VC = 11.2V @ 53A | Limited to lower-energy surges; unsuitable for ISO 7637-2 Pulse 1 or high-current lightning tests | Select only when board space restricts DO-214AB and surge threat level is ≤600W |
| 1.5KE6.8CA (ON Semiconductor) | Through-hole DO-15 package; identical electrical specs but incompatible mounting | Requires manual soldering or wave-solder process; not suitable for fully automated SMT lines | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CA uniquely delivers 1500W surge capability in an SMT-optimized DO-214AB package with full ISO 7637-2 validation - making it the preferred choice for production-grade automotive, industrial, and telecom systems requiring automated assembly and high-energy immunity.
Availability
1.5SMC6.8CA is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive BCM interfaces, and telecom Ethernet port hardening requiring stable component supply and full traceability.
Supply support for 1.5SMC6.8CA 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 - serving industrial, automotive, and telecom markets since 1979.
The 1.5SMC6.8CA belongs to TSC's high-power surface-mount TVS family engineered specifically for ISO 7637-2 and IEC 61000-4-x compliance in harsh electromagnetic environments.
FAQ
What is the clamping voltage of the 1.5SMC6.8CA under a 1000A transient?
The 1.5SMC6.8CA has a maximum clamping voltage (VC) of 10.5V when subjected to a 1000A peak impulse current with a 10/1000µs waveform. This value is measured per Fig.5 in the datasheet and ensures downstream components remain below their absolute maximum ratings during surge events. The 1.5SMC6.8CA achieves this with minimal voltage overshoot due to its sub-1ps response time.
Is the 1.5SMC6.8CA unidirectional or bidirectional?
Yes, the 1.5SMC6.8CA is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals, differential buses like RS-485 or LIN, and floating power domains. Unlike unidirectional variants (e.g., 1.5SMC6.8A), the 1.5SMC6.8CA has no cathode marking and functions identically across both terminals.
Does the 1.5SMC6.8CA meet automotive surge immunity standards?
Yes, the 1.5SMC6.8CA is explicitly validated to meet ISO 7637-2 test pulses 1, 2a, 2b, 3a, and 3b - covering key automotive transients including load dump, battery disconnection, and capacitive coupling. Its 1500W rating and 10.5V clamping enable direct integration into BCM, ADAS, and infotainment subsystems without additional filtering, as confirmed in Taiwan Semiconductor's S2207 documentation.
What is the maximum working voltage (VWM) for the 1.5SMC6.8CA?
The maximum working stand-off voltage (VWM) for the 1.5SMC6.8CA is 5.80V at 25°C. This is the highest DC or RMS voltage the device can withstand continuously without exceeding 1µA leakage current. Operating above this threshold risks premature conduction and accelerated degradation - so the 1.5SMC6.8CA is best suited for 3.3V or 5V systems with margin, not 12V rails.
What package type does the 1.5SMC6.8CA use, and is it compatible with standard SMT processes?
The 1.5SMC6.8CA uses the DO-214AB (SMC) surface-mount package, which is fully compatible with standard reflow soldering profiles. It carries Moisture Sensitivity Level 1 per J-STD-020 - meaning it can be stored and processed without baking or dry-pack handling. Its matte tin-plated leads comply with J-STD-002 for reliable solder wetting, and the 0.210g weight supports high-speed pick-and-place accuracy.
1.5SMC6.8CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC6.8CA FAQ
1.How can I place an order for 1.5SMC6.8CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CA 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 reliable?
The price and inventory of 1.5SMC6.8CA 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 is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CA?
1.5SMC6.8CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CA 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?
For technical support, including 1.5SMC6.8CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CA requirements.
6.How does Aetrix verify that 1.5SMC6.8CA is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CA 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 meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CA?
All 1.5SMC6.8CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CA, 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 part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CA Tags
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