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Taiwan Semiconductor Corporation 1.5SMC6.8H
- Part No.:
- 1.5SMC6.8H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8H.pdf
- Description:
- 1500W, 6.8V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,736
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Product details
Overview
1.5SMC6.8H 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 features a 6.8V breakdown voltage (6.12–7.48V), 1500W peak pulse power rating, 10.8V maximum clamping voltage at 1000A, 5.5V working stand-off voltage, and <1μA leakage current above 10V - deployed in automotive infotainment power inputs to absorb ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5SMC6.8H datasheet, 1.5SMC6.8H pinout, 1.5SMC6.8H application, or 1.5SMC6.8H equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, junction temperature derating above 25°C, DO-214AB (SMC) footprint compatibility, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The 1.5SMC6.8H uses a glass-passivated silicon junction optimized for fast transient response (<1.0ps), enabling suppression of ESD (IEC 61000-4-2) and load-dump surges before downstream components experience overstress. Its unidirectional configuration provides asymmetric conduction: low forward voltage (3.5V @ 50A) during surge conduction while blocking reverse leakage below 5.5V.
Thermal performance is defined by RθJA = 50°C/W and RθJC = 15°C/W, supporting operation up to +150°C junction temperature. The device meets ISO 7637-2 test pulses without external series impedance, relying on intrinsic dynamic resistance to limit clamped voltage to ≤10.8V at 1000A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 6.12V / 7.48V at 10mA - defines minimum guaranteed breakdown onset and maximum variation across production lot |
| VWM | 5.5V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below system rail |
| VC @ IPPM | 10.8V at 1000A - clamped voltage during worst-case 1.5kW transient; determines whether protected IC remains within absolute max ratings |
| PPK | 1500W - peak pulse power handling per 1ms waveform; enables survival of automotive load dump and ISO 7637-2 Pulse 5a |
| IR @ VWM | <1μA - ultra-low reverse leakage ensures minimal standby power loss in battery-critical applications |
| TJ max | +150°C - maximum junction temperature; supports under-hood automotive placement with standard PCB copper area |
| Package | DO-214AB (SMC) - industry-standard 2-pin SMT outline with 7.11 × 6.22 mm footprint and cathode band marking |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode unidirectional configuration. Cathode indicated by molded band on case body. Matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path during surge | Connected to protected circuit ground or low-side return; conducts surge current into GND plane when VAK > 3.5V |
| Cathode | Reverse-biased terminal during normal operation | Connected to protected line (e.g., 5V rail); blocks leakage until VK-A ≥ 6.12V, then clamps to ≤10.8V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| Glass passivated junction | Enables stable VBR tolerance and low leakage over lifetime, even under high-humidity industrial environments |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without derating |
| Fast response time <1.0ps | Clamps before ESD or lightning-induced transients propagate beyond first-stage filtering, protecting sensitive PHYs and MCUs |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow; compatible with standard SMT assembly lines |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed infotainment head unit exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary TVS clamp on main 5V/3.3V DC-DC input rail, placed immediately upstream of LDO regulator. Use Value: Limits transient voltage to ≤10.8V, preventing latch-up or gate oxide damage in downstream PMICs rated for 6V absolute max. |
Use Scenario: RS-485 transceiver connected to long field wiring in factory automation cabinets. IC Role / Device Role / Timing Role: Line-side TVS on A/B differential pair, shunting induced surges before receiver input stage. Use Value: Clamps common-mode transients to <11V, maintaining signal integrity and avoiding false logic states during EMC testing. |
| Consumer USB Power Port Protection | Telecom DSL Line Protection |
Use Scenario: USB-C port on portable media player subjected to human-body-model (HBM) ESD events during plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line, referenced to system ground with minimal trace inductance. Use Value: Responds in <1ps to divert 8kV HBM discharge, limiting VBUS overshoot to 10.8V and preserving USB PD controller operation. |
Use Scenario: DSL line card interface exposed to lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: First-stage protector on tip/ring lines before hybrid transformer and line driver IC. Use Value: Absorbs 1500W surge energy per ITU-T K.20/K.21, reducing secondary protector stress and extending system MTBF. |
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 | Same DO-214AA (SMB) package; lower PPK = 600W; VC = 11.2V @ 53.3A | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients like ESD or switching noise | Select only if system surge energy is confirmed ≤600W and layout allows SMB footprint |
| 1.5KE6.8A | Through-hole DO-15 package; PPK = 1500W; VC = 11.5V @ 130A; higher thermal mass but no SMT compatibility | Requires board real estate and wave-solder process; unsuitable for high-density automotive modules | Choose only for legacy through-hole designs where rework to SMT is not feasible |
Compared with SMBJ6.8A and 1.5KE6.8A, the 1.5SMC6.8H delivers identical 1500W surge capability in an SMT-optimized DO-214AB package with tighter VC (10.8V vs. 11.2–11.5V), enabling robust protection for 5V systems with narrow voltage margins.
Availability
1.5SMC6.8H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer USB power protection requiring stable component supply and AEC-Q101 assurance.
Supply support for 1.5SMC6.8H 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 devices.
The 1.5SMC6.8H belongs to TSC's AEC-Q101-qualified SMC-series TVS family, engineered specifically for automotive and industrial DC power rail protection against ISO 7637-2 and IEC 61000-4-5 threats.
FAQ
What is the maximum clamping voltage of the 1.5SMC6.8H under full-rated surge current?
The 1.5SMC6.8H exhibits a maximum clamping voltage (VC) of 10.8V when subjected to its rated peak pulse current of 1000A (1.5kW, 1ms waveform). This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 10.8V during worst-case transient events, making it suitable for safeguarding 5V logic rails with tight voltage tolerances.
Is the 1.5SMC6.8H suitable for bidirectional transient protection?
No - the 1.5SMC6.8H is a unidirectional TVS diode intended for DC line protection where polarity is fixed. For bidirectional AC or data-line applications, TSC offers the 1.5SMC6.8AH variant (marked DEJ), which provides symmetrical clamping in both directions and is explicitly designated for bipolar use per datasheet Note 4.
Does the 1.5SMC6.8H require derating at elevated ambient temperatures?
Yes - the 1.5SMC6.8H must be derated above 25°C ambient per Figure 2 in the datasheet. At 85°C ambient, its peak pulse power drops to approximately 900W (60% of 1500W), and at 125°C, it falls to ~450W. Designers must verify thermal layout and junction temperature using RθJA = 50°C/W to ensure TJ stays ≤150°C under worst-case surge duty cycle.
What is the leakage current specification for the 1.5SMC6.8H at its working stand-off voltage?
The 1.5SMC6.8H specifies a maximum reverse leakage current (IR) of 1000μA at its working stand-off voltage (VWM) of 5.5V, tested at 25°C. However, typical leakage is <1μA above 10V, and actual measurements at 5.5V show sub-μA values - critical for low-power battery-operated systems where standby current budget is constrained.
How does the 1.5SMC6.8H compare to the 1.5SMC6.8AH in terms of breakdown voltage tolerance?
The 1.5SMC6.8H has a VBR range of 6.12–7.48V (±10% around nominal 6.8V), while the 1.5SMC6.8AH tightens this to 6.46–7.14V (±5%). This narrower tolerance improves predictability in precision clamping applications but does not affect clamping voltage (VC remains 10.8V for both), and both share identical 1500W rating and DO-214AB packaging.
1.5SMC6.8H 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):
- 5.5V
- 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)
1.5SMC6.8H FAQ
1.How can I place an order for 1.5SMC6.8H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8H 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 1.5SMC6.8H reliable?
The price and inventory of 1.5SMC6.8H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8H is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8H?
1.5SMC6.8H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8H 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 1.5SMC6.8H?
For technical support, including 1.5SMC6.8H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8H requirements.
6.How does Aetrix verify that 1.5SMC6.8H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8H 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 1.5SMC6.8H meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8H?
All 1.5SMC6.8H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8H, 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 1.5SMC6.8H part is unused and in its original packaging.
Return procedure for 1.5SMC6.8H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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