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Taiwan Semiconductor Corporation 1.5SMC6.8CAH
- Part No.:
- 1.5SMC6.8CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CAH.pdf
- Description:
- 1500W, 6.8V, 5%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,506
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Product details
Overview
1.5SMC6.8CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with breakdown voltage 6.46–7.14 V at 10 mA test current, working stand-off voltage 5.80 V, clamping voltage 10.5 V at 1000 A peak pulse current, and AEC-Q101 qualification for automotive-grade surge protection in power rails and I/O lines.
For engineers reviewing the 1.5SMC6.8CAH datasheet, 1.5SMC6.8CAH pinout, 1.5SMC6.8CAH application, or 1.5SMC6.8CAH equivalent, this device is selected for ESD/ISO 7637-2-compliant transient suppression where fast response (<1.0 ps), low leakage (<1 µA above 10 V), and bidirectional clamping symmetry are required in space-constrained SMT designs.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical clamping performance regardless of transient polarity-critical for protecting AC-coupled interfaces or ungrounded signal paths. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The device meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms and supports automotive load-dump immunity when used with appropriate series impedance. Thermal resistance values (RθJA = 50 °C/W, RθJC = 15 °C/W) confirm suitability for PCBs with moderate copper area and no forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 6.46 V / 7.14 V at 10 mA - defines guaranteed conduction onset window for design margining |
| VWM | 5.80 V - maximum continuous DC or RMS voltage before leakage exceeds 1 µA |
| VC @ IPPM | 10.5 V at 1000 A - peak clamped voltage seen by protected circuit during worst-case 1.5 kW transient |
| IPPM | 1000 A - maximum non-repetitive surge current survivable per 10/1000 µs waveform |
| PPK | 1500 W - peak pulse power rating enabling robust protection against lightning-induced surges |
| TJ max | +150 °C - junction temperature limit supporting operation in under-hood or industrial enclosures |
| Response time | <1.0 ps - enables clamping before ESD or fast transients propagate into IC inputs |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional configuration with cathode band omitted (symmetrical terminals). Weight: 0.210 g. Moisture sensitivity level: J-STD-020 Level 1 (unlimited floor life at ≤30 °C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output for transient energy; no polarity dependency in layout |
| Case (body) | Thermal and mechanical interface | DO-214AB molded body provides UL 94V-0 flammability rating and solderable matte tin-plated leads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, infotainment, and ADAS sensor interfaces |
| ISO 7637-2 compliance | Guaranteed immunity to load-dump (Pulse 5a/b), supply transients (Pulse 1/2a/2b), and coupling noise (Pulse 3a/3b) |
| Glass passivated junction | Stable VBR tolerance and low parameter drift over temperature and lifetime |
| Fast response <1.0 ps | Clamps ESD events before propagation across PCB traces or into sensitive CMOS inputs |
| RoHS + halogen-free | Complies with IEC 61249-2-21 and EU directives for green manufacturing and end-of-life recycling |
Applications
| Automotive Power Rail Protection | Industrial Ethernet Port Protection |
|---|---|
Use Scenario: Protecting 5 V or 12 V power domains in vehicle ECUs from battery transients and alternator load dump. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of LDOs or DC-DC converters to limit rail excursions. Use Value: Clamps to 10.5 V at 1000 A, preventing overvoltage damage to downstream regulators rated for ≤16 V absolute max. |
Use Scenario: Safeguarding RJ45 PHY interface pins against ESD and induced surges in factory automation gateways. IC Role / Device Role / Timing Role: Primary line-side TVS on differential pairs (e.g., TX+/TX−), mounted adjacent to connector. Use Value: Sub-1 ps response ensures clamping occurs before 15 kV HBM ESD pulses reach PHY silicon, preserving signal integrity. |
| Consumer USB-C Port Protection | Telecom DSL Line Interface |
Use Scenario: Securing VBUS and CC lines in portable chargers and power banks against hot-plug transients and reverse-voltage faults. IC Role / Device Role / Timing Role: Bidirectional TVS bridging VBUS-to-GND and CC-to-GND to handle ±20 kV contact discharge. Use Value: 5.80 V working voltage allows safe operation across full USB-C VBUS range (4.5–21 V) without leakage-induced battery drain. |
Use Scenario: Front-end surge protection for ADSL/VDSL line drivers exposed to lightning-induced longitudinal surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Paired bidirectional TVS devices across tip/ring and tip-ground/ring-ground to absorb common-mode energy. Use Value: 1500 W peak power rating sustains multiple 10/1000 µs surges up to 1 kV without degradation, meeting ITU-T K.21 basic protection class. |
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 DO-214AA (SMB) package, VC = 11.2 V @ 53.3 A | Not suitable for ISO 7637-2 Pulse 5 or high-energy lightning surges; limited to consumer-grade ESD | Select when board space is tighter and surge threat level is ≤IEC 61000-4-2 Level 4 only |
| 1.5KE6.8CA | Through-hole DO-15 package, higher VC (12.5 V @ 118 A), same 1500 W rating but slower thermal recovery | Requires through-hole assembly; unsuitable for automated SMT lines or high-density layouts | Select only for legacy through-hole designs or where manual rework access is prioritized over production efficiency |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CAH delivers superior surge handling in an SMT-optimized footprint with automotive qualification-enabling single-device compliance with ISO 7637-2 while maintaining compatibility with high-speed placement equipment.
Availability
1.5SMC6.8CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial communications, consumer USB-C power delivery, and telecom line interface designs requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC6.8CAH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management components.
The 1.5SMC series was engineered for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust SMT manufacturability.
FAQ
What is the key difference between 1.5SMC6.8CAH and 1.5SMC6.8AH?
The 1.5SMC6.8CAH is bidirectional (CAH suffix), meaning it clamps symmetrically in both polarities-ideal for AC signals or ungrounded lines. The 1.5SMC6.8AH is unidirectional (AH suffix) with a defined cathode band and only clamps in reverse bias. Both share identical VBR, VC, and PPK, but their circuit integration differs fundamentally. Always verify polarity marking and application topology before substituting 1.5SMC6.8CAH.
Does 1.5SMC6.8CAH meet ISO 7637-2 Pulse 5 (load dump)?
No-1.5SMC6.8CAH meets ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b, but not Pulse 5, which requires sustained clamping at ≥35 V for up to 400 ms. For load dump, a dedicated load-dump suppressor (e.g., TSDxxH series) or TVS paired with a Zener clamp is needed. The 1.5SMC6.8CAH remains valid for all other vehicle-level transients and ESD events.
What is the maximum steady-state power dissipation for 1.5SMC6.8CAH?
The steady-state power dissipation (PD) for 1.5SMC6.8CAH is 6.5 W at TA = 25 °C, derating linearly above that ambient temperature per the datasheet's Fig.2. This rating applies only to continuous DC or low-frequency AC stress-not transient events. In normal operation, leakage current is <1 µA above 10 V, so actual steady-state power is negligible unless biased near VBR.
Can 1.5SMC6.8CAH be used in place of a unidirectional TVS like 1.5SMC6.8H?
Yes-but only if the circuit is inherently symmetrical (e.g., differential data lines, AC-coupled audio, or floating grounds). Replacing a unidirectional 1.5SMC6.8H with 1.5SMC6.8CAH introduces forward conduction in both directions, potentially disrupting bias networks or causing unintended current paths. Layout review and functional validation are mandatory before substitution.
What does the "C" in the 1.5SMC6.8CAH part number signify?
The "C" in 1.5SMC6.8CAH explicitly denotes bidirectional configuration per Taiwan Semiconductor's naming convention. "A" indicates tightened VBR tolerance (±5% vs. ±10% for non-A variants), and "H" specifies the DO-214AB (SMC) package. So 1.5SMC6.8CAH = 1500 W, bidirectional, ±5% VBR, SMC package-fully distinct from 1.5SMC6.8AH (unidirectional) or 1.5SMC6.8H (±10%, unidirectional).
1.5SMC6.8CAH 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):
- 5.8V
- 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)
1.5SMC6.8CAH FAQ
1.How can I place an order for 1.5SMC6.8CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CAH 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 1.5SMC6.8CAH reliable?
The price and inventory of 1.5SMC6.8CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CAH?
1.5SMC6.8CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CAH 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 1.5SMC6.8CAH?
For technical support, including 1.5SMC6.8CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CAH requirements.
6.How does Aetrix verify that 1.5SMC6.8CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CAH 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 1.5SMC6.8CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CAH?
All 1.5SMC6.8CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CAH, 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 1.5SMC6.8CAH part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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