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Taiwan Semiconductor Corporation 1.5SMC68H
- Part No.:
- 1.5SMC68H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68H.pdf
- Description:
- 1500W, 68V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,868
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Product details
Overview
1.5SMC68H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It delivers 1500W peak pulse power, 61.2–74.8V breakdown voltage at 1mA test current, 55.1V working stand-off voltage, and clamps transients to ≤98.0V at 16A peak impulse current. It is used in automotive infotainment power rails compliant with ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the 1.5SMC68H datasheet, 1.5SMC68H pinout, 1.5SMC68H application, or 1.5SMC68H equivalent, key selection criteria include clamping voltage vs. protected IC VDD margin, leakage current at operating voltage, thermal resistance (RθJA = 50°C/W), AEC-Q101 qualification status, and DO-214AB package compatibility with automated SMT assembly.
Technical Context
The 1.5SMC68H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (61.2–74.8V). Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1µA @ 55.1V), while fast response time (<1.0ps) enables effective suppression of ESD and lightning-induced transients.
Thermally, it features RθJC = 15°C/W and RθJA = 50°C/W, supporting operation from –55°C to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and moisture sensitivity level 1 per J-STD-020, confirming suitability for reflow-soldered automotive and industrial PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 61.2–74.8V - defines minimum and maximum voltage at which avalanche conduction begins under standardized test conditions |
| VWM | 55.1V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for system DC rail voltage |
| VC @ IPPM=16A | ≤98.0V - clamped voltage during 10/1000µs surge; determines worst-case overvoltage seen by downstream circuitry |
| PPK | 1500W - peak pulse power handling capability per 1ms waveform; defines energy absorption capacity per transient event |
| IR @ VWM | <1µA - reverse leakage at rated stand-off voltage; critical for low-power standby circuits and battery-backed systems |
| TJ max | +150°C - maximum junction temperature; constrains thermal design and derating above ambient |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 × 6.22 mm footprint and cathode band marking |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band on one end. Designed for automated placement and reflow soldering per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / low-side reference | Connected to ground or lower-potential node in unidirectional configuration; carries surge current to reference plane |
| Cathode | Protected line connection / high-side input | Connected to the line being protected (e.g., 48V supply rail); blocks normal operation below VWM, avalanches above VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal and humidity stress |
| Clamping voltage ≤98.0V @ 16A | Provides ≥12% margin below typical 110V automotive load-dump clamp threshold, protecting 100V-rated MOSFETs and regulators |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (capacitive coupling) immunity requirements |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates production delays and moisture-related popcorning risk |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 48V DC power distribution networks in ADAS domain controllers against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to shunt surge energy away from PMICs and microcontrollers. Use Value: Clamps 1500W transients to ≤98.0V, maintaining safe operating area for 100V-input buck converters and preventing latch-up in 3.3V/5V logic supplies. | Use Scenario: Safeguarding 24V digital input modules in factory automation PLCs from field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Front-end transient suppressor on isolated 24V sensor inputs, positioned before optocoupler or digital isolator input stages. Use Value: Sub-1µA leakage at 24V ensures minimal impact on current-loop sensing accuracy; DO-214AB footprint supports dense I/O card layouts. |
| Telecom DC Power Interface | Consumer Equipment AC/DC Secondary Side |
Use Scenario: Surge protection on -48V telecom rectifier outputs feeding baseband processing boards in 5G remote radio units. IC Role / Device Role / Timing Role: Unidirectional TVS connected between -48V rail and return, absorbing ISO 7637-2 Pulse 1/2a/3b events coupled through shared backplane. Use Value: 98.0V clamping limits voltage excursion across -48V-to-ground isolation barriers, preserving creepage/clearance integrity and avoiding secondary breakdown. | Use Scenario: Secondary-side overvoltage suppression on 12V/19V outputs of laptop AC adapters and USB-C PD chargers. IC Role / Device Role / Timing Role: Final-stage TVS on regulated DC output, guarding against regulator failure modes and external short-circuit transients. Use Value: 55.1V VWM allows safe operation with 12V/19V nominal rails while providing robust 1500W surge margin; RoHS/halogen-free construction meets consumer safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | 64V VBR min (64–71.1V), 64V VWM, 1000W PPK, DO-214AA package (smaller footprint) | Lower power rating and tighter VBR tolerance; suitable for lower-energy environments like consumer USB ports | Select SMBJ64A only if system surge energy is ≤1000W and board space constraints favor smaller DO-214AA |
| 1.5KE68A | 68V VBR (64.6–71.4V), 68V VWM, 1500W PPK, axial DO-15 package (through-hole) | Requires manual or wave soldering; lacks AEC-Q101 qualification and ISO 7637-2 validation | Choose 1.5KE68A only for non-automotive, cost-sensitive prototyping where SMT is unavailable |
Compared with SMBJ64A and 1.5KE68A, the 1.5SMC68H provides higher surge robustness in a surface-mount package with automotive-grade qualification-enabling direct integration into AEC-Q200-compliant power modules without layout or reliability compromise.
Availability
1.5SMC68H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply and full traceability.
Supply support for 1.5SMC68H 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 certification capability.
The 1.5SMC68H belongs to TSC's high-power surface-mount TVS family engineered for ISO 7637-2-compliant automotive and industrial surge immunity-designed to replace older axial or lower-power SMD suppressors without sacrificing clamping performance or thermal robustness.
FAQ
What is the breakdown voltage range of the 1.5SMC68H?
The 1.5SMC68H has a guaranteed breakdown voltage range of 61.2V to 74.8V at 1mA test current (VBR @ IT = 1mA), measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures reliable triggering across temperature and unit-to-unit variation while maintaining compatibility with 55.1V working stand-off voltage.
Is the 1.5SMC68H suitable for automotive applications?
Yes, the 1.5SMC68H is AEC-Q101 qualified and explicitly validated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity. Its DO-214AB package, MSL Level 1 rating, and –55°C to +150°C operating range make it appropriate for under-hood and infotainment power rail protection in passenger vehicles and commercial fleets.
What is the maximum clamping voltage of the 1.5SMC68H under surge conditions?
The 1.5SMC68H clamps to a maximum of 98.0V at 16A peak impulse current (IPPM) with a 10/1000µs waveform. This value is measured per Fig.5 in the datasheet and defines the worst-case overvoltage imposed on protected circuitry during standardized surge events.
Does the 1.5SMC68H have bidirectional capability?
No, the 1.5SMC68H is a unidirectional TVS diode. For bidirectional operation, Taiwan Semiconductor offers the 1.5SMC68AH variant (marked DEJ), which provides symmetrical clamping in both polarities and is designated for applications requiring AC line or data-line protection without polarity constraints.
What packaging and reel quantity is available for the 1.5SMC68H?
The 1.5SMC68H is supplied in DO-214AB (SMC) package on tape-and-reel format with 3,000 units per reel. The cathode band marking and matte tin-plated leads comply with J-STD-002 solderability requirements, ensuring compatibility with standard SMT reflow profiles and automated pick-and-place equipment.
1.5SMC68H 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 55.1V
- Voltage - Breakdown (Min):
- 61.2V
- Voltage - Clamping (Max) @ Ipp:
- 98V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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)
1.5SMC68H FAQ
1.How can I place an order for 1.5SMC68H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68H 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 1.5SMC68H reliable?
The price and inventory of 1.5SMC68H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68H is usually 5 days.
3.What payment methods are accepted for 1.5SMC68H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68H?
1.5SMC68H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68H 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 1.5SMC68H?
For technical support, including 1.5SMC68H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68H requirements.
6.How does Aetrix verify that 1.5SMC68H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68H 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 1.5SMC68H meets industry standards.
7.What is the process for return or replacement of 1.5SMC68H?
All 1.5SMC68H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68H, 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 1.5SMC68H part is unused and in its original packaging.
Return procedure for 1.5SMC68H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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