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Taiwan Semiconductor Corporation 1.5SMC68CH
- Part No.:
- 1.5SMC68CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68CH.pdf
- Description:
- 1500W, 68V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,956
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Product details
Overview
1.5SMC68CH from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 61.2–74.8 V, clamping voltage of 98.0 V at 16 A peak pulse current, and DO-214AB (SMC) package. It protects power rails and signal lines in automotive and industrial systems against ESD, lightning-induced surges, and load-switching transients.
For engineers reviewing the 1.5SMC68CH datasheet, 1.5SMC68CH pinout, 1.5SMC68CH application, or 1.5SMC68CH equivalent, this device offers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1 ps response time, <1 µA leakage above 10 V, and UL 94V-0 molding compound - critical for robust automotive front-end protection design.
Technical Context
This TVS diode operates as a unidirectional clamping device with glass-passivated junction and cathode-band polarity marking. Its 1500 W peak pulse power rating (10/1000 µs waveform), 55.1 V working stand-off voltage, and 98.0 V maximum clamping voltage at 16 A define its surge-handling envelope in DC power line protection.
Thermal performance is characterized by 50 °C/W junction-to-ambient and 15 °C/W junction-to-case thermal resistance. The device supports steady-state dissipation up to 6.5 W at 25 °C ambient and operates across -55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (per 10/1000 µs waveform; defines maximum transient energy absorption capability) |
| Breakdown Voltage (VBR) | 61.2–74.8 V @ 1 mA (guaranteed conduction onset under standardized test conditions) |
| Working Stand-off Voltage (VWM) | 55.1 V (maximum continuous reverse voltage before significant leakage begins) |
| Clamping Voltage (VC) | 98.0 V @ 16 A (voltage seen by protected circuit during worst-case 1500 W surge) |
| Leakage Current (IR) | <1 µA @ 55.1 V (ensures minimal power loss and signal integrity in standby) |
| Response Time | <1.0 ps (enables effective suppression of fast-rising ESD and switching transients) |
| Junction Temperature Range | -55 °C to +150 °C (supports operation in under-hood automotive and high-temp industrial environments) |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g. Meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (reverse-biased configuration) | Connected to ground or low-impedance return path; forms clamping path with cathode |
| Cathode | Current exit terminal (marked with band) | Connected to protected line (e.g., 48 V rail); conducts surge current to ground when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JEDEC standards |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) without degradation |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| UL 94V-0 molding compound | Ensures flame retardancy in high-energy surge events, meeting automotive safety requirements |
| Fast response & low leakage | Sub-1 ps turn-on enables protection of high-speed interfaces; <1 µA leakage preserves battery life in always-on systems |
Applications
| Automotive Power Rail Protection | Industrial DC Input Stage |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs against load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground. Use Value: Limits voltage to ≤98.0 V during 1500 W pulses, preventing damage to downstream DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding programmable logic controller (PLC) power inputs from field-wiring surges and inductive kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input stage, upstream of filtering and regulation. Use Value: Withstands repeated 10/1000 µs surges per IEC 61000-4-5 while maintaining <1 µA leakage at 55.1 V operating voltage. |
| Telecom Line Interface | Consumer Equipment DC Adapter Input |
|
Use Scenario: Front-end protection for PoE-powered network switches handling Ethernet cable ESD and induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant (1.5SMC68AH) used in differential pair protection; 1.5SMC68CH used for single-ended supply rail clamping. Use Value: Clamps transients within 1 ps to preserve signal integrity on 48 V bias rails feeding PHY ICs. |
Use Scenario: Input-stage surge protection for USB-C PD adapters and smart home hubs with external AC/DC supplies. IC Role / Device Role / Timing Role: Standoff-rated TVS on secondary-side 20 V output rail to absorb adapter overshoot and hot-plug spikes. Use Value: 55.1 V VWM ensures no conduction during normal operation; 98.0 V VC prevents latch-up in downstream GaN FET drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A (Bourns) | Lower peak power (600 W), same DO-214AA package, 64 V standoff, 104 V clamping at 5.8 A | Not AEC-Q101 qualified; limited to commercial/industrial use; insufficient for automotive load-dump immunity | Select only for cost-sensitive non-automotive designs where 1500 W surge margin is not required. |
| 1.5KE68A (ON Semiconductor) | Through-hole DO-15 package, 1500 W rating, 68 V standoff, 104 V clamping at 14.3 A | Requires PCB rework for SMT migration; lacks AEC-Q101 and ISO 7637-2 validation | Use only for legacy through-hole designs or prototyping where board space allows axial lead placement. |
Compared with SMBJ64A and 1.5KE68A, the 1.5SMC68CH delivers automotive-grade reliability, surface-mount compatibility, and superior clamping ratio (98.0 V / 55.1 V = 1.78) - enabling tighter voltage margins in next-generation 48 V architectures.
Availability
1.5SMC68CH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input stages, telecom power interface hardening, and consumer DC adapter surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5SMC68CH 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 1.5SMC series was designed specifically for high-reliability automotive and industrial transient suppression, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and robust SMT manufacturability in harsh environments.
FAQ
What is the polarity configuration of the 1.5SMC68CH?
The 1.5SMC68CH is a unidirectional TVS diode with cathode band marking. It conducts only when the cathode is biased positive relative to the anode - making it suitable for DC rail clamping where polarity is fixed. This differs from bidirectional variants like 1.5SMC68AH, which protect AC or differential signals.
Does the 1.5SMC68CH meet automotive qualification standards?
Yes, the 1.5SMC68CH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its glass-passivated junction, UL 94V-0 compound, and -55 °C to +150 °C operating range confirm suitability for under-hood and body-control module applications.
What is the maximum clamping voltage of the 1.5SMC68CH under surge conditions?
The 1.5SMC68CH has a maximum clamping voltage (VC) of 98.0 V at 16 A peak pulse current (10/1000 µs waveform). This value is guaranteed across temperature and lifetime, ensuring protected circuits remain below critical overvoltage thresholds during worst-case transients.
How does the 1.5SMC68CH compare to the 1.5SMC68AH variant?
The 1.5SMC68CH is unidirectional with 55.1 V working stand-off voltage and 98.0 V clamping, while the 1.5SMC68AH is bidirectional with identical VBR (64.6–71.4 V) but 58.1 V VWM and 92.0 V VC. Use 1.5SMC68CH for DC rail protection; choose 1.5SMC68AH for AC-coupled or differential line protection.
What packaging and reel quantity is available for the 1.5SMC68CH?
The 1.5SMC68CH is supplied in DO-214AB (SMC) package on 3,000-piece tape-and-reel format, optimized for high-speed pick-and-place assembly. Lead finish is matte tin, compliant with J-STD-002 solderability standards and JESD201 Class 2 whisker resistance requirements.
1.5SMC68CH 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):
- 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)
1.5SMC68CH FAQ
1.How can I place an order for 1.5SMC68CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68CH 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 1.5SMC68CH reliable?
The price and inventory of 1.5SMC68CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC68CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68CH?
1.5SMC68CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68CH 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 1.5SMC68CH?
For technical support, including 1.5SMC68CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68CH requirements.
6.How does Aetrix verify that 1.5SMC68CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68CH 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 1.5SMC68CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC68CH?
All 1.5SMC68CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68CH, 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 1.5SMC68CH part is unused and in its original packaging.
Return procedure for 1.5SMC68CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68CH Tags
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